--- source_url: "https://www.toptal.com/services/technology-services/mobile-app-testing-services?utm_source=openai" title: "Mobile App Testing Services | Toptal®" mirrored_at: 2026-08-18T01:00:59.280Z host: www.toptal.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/www.toptal.com/services/technology-services/mobile-app-testing-services__q__utm_source_openai" --- > **Original source:** https://www.toptal.com/services/technology-services/mobile-app-testing-services?utm_source=openai - [Skip to Navigation](#nav) - [Skip to Content](#main) - [Skip to Footer](#footer) - [Get a Free Consultation Now](https://www.toptal.com/hire/services?interested_in=mobile_app_testing_services) - [Log In](https://www.toptal.com/users/login) Mobile App Testing Services/ ## Mobile App Testing Services – Deliver Flawless Functionality Successfully launch and continually improve your mobile app with Toptal’s Mobile App Testing Services. We make sure your app is free from performance issues, provides users with a seamless and engaging experience across devices, and maintains high operational standards. [Get a Free Consultation Now](https://www.toptal.com/hire/services?interested_in=mobile_app_testing_services) Clients Served 35,000+ Total Vetted Professionals 30,000+ Toptal Total Projects Delivered 85,000+ Years in Business 15+ TRUSTED BY LEADING BRANDS ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F8519150%2Fimage%2Foptimized%2Fokta-e1a11254ea5df3701d99daf12abb1d1c.svg) ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F8519149%2Fimage%2Foptimized%2FUSC-30912e526f6ee02be8bd99aa5e1038a6.svg) ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F8519152%2Fimage%2Foptimized%2FDuolingo-00f9469829a60ddbf4ebca881dc8230c.svg) ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F8519148%2Fimage%2Foptimized%2Fmotorola-5cf692665738bc3bb57c160ab3fb25a7.svg) ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F8519151%2Fimage%2Foptimized%2FAMN-1f1a79e87eff2f3b33d6e9e86b8c440f.svg) ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcp_trustbar%2Flogo%2F6050364%2Fimage%2Foptimized%2FDoordash_logo_Padded__1_-2dc77d776a2eb128c48b9bc9f71f6634.svg) Our Services Provide flawless functionality, security, and user satisfaction with Toptal’s Mobile App Testing Services. Our comprehensive solutions deliver seamless performance and reliability across all devices and platforms. ### Mobile Functional Testing Ensure flawless functionality with comprehensive testing services across a wide range of mobile devices. ### Mobile Performance Testing Assess how your app performs under stress by evaluating its speed, responsiveness, and stability across mobile devices. ### Mobile Usability Testing Enhance user satisfaction by ensuring seamless experiences through expert usability testing on various screen resolutions. ### Mobile Security Testing Protect your mobile app from vulnerabilities with rigorous security testing aligned with industry standards. ### Mobile Compatibility Testing Achieve app compatibility across OS versions and devices to deliver consistent user experiences with every update. ### Mobile Test Automation Expedite the mobile app testing process via automation, ensuring efficiency and accuracy on all devices. ### Mobile Accessibility Testing Confirm that your mobile app meets accessibility standards and provides an inclusive experience for all users. ### Mobile Beta Testing Management Collect valuable feedback with structured mobile beta testing services to refine your app before launching it. ### Mobile Installation Testing Verify smooth installation, updates, and uninstallation across all mobile devices. ### App Store Compliance Testing Make sure your app complies with all app store guidelines and requirements to avoid rejection during submission. ### Mobile Regression Testing Prevent new bugs from being introduced by thoroughly retesting your app after every update. ### Mobile Localization Testing Expand global reach by ensuring your app’s language and regional settings are accurate with localization testing. PARTNERSHIP THAT WORKS ## How We Deliver Mobile App Testing Services Our mobile app testing experts, with experience at leading companies, develop tailored solutions to meet your business needs and unique industry demands for sustainable results and long-term success. * * * 1 ### Discover A leader from our team works with you to understand your business challenges, pain points, and strategic goals to uncover new opportunities and identify the options to reach your objectives. 2 ### Define Toptal leaders collaborate with your team to define your specific goals and service needs, evaluating multiple approaches and aligning requirements with your strategic objectives to define the best solution. 3 ### Develop Once your service is defined and your talent or team is on board, they will create your unique project timeline, process, and initial proposals, whether it’s designing a custom mobile app testing plan or implementing advanced automation testing solutions. 4 ### Deploy Toptal will get to work, tracking quality assurance, handling project management, and maintaining the delivery schedule. [Get a Free Consultation Now](https://www.toptal.com/hire/services?interested_in=mobile_app_testing_services) [Robert Orshaw](https://www.linkedin.com/in/robert-orshaw-97028b1a/) ![](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F547d690ccd8244a1.svg)CEO, Technology Services As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies.As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies. Previously At ![Deloitte](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcompany_logo%2F5923134%2Fwhite_image%2Foptimized%2Fdeloitte-183d3d859c4a3bfa1e1832b171aedf1c.svg) CUSTOMIZED SOLUTIONS ## Mobile App Testing Services That Deliver Value Toptal delivers leading mobile app testing services through its diverse talent network and flexible delivery models. We implement the right skills at each project phase, blending expertise from various roles for seamless execution. - End-to-End Delivery by Toptal - On-demand Talent and Teams End-to-End Delivery by Toptal Comprehensive project delivery, tailored to your specific requirements. ![CEO, Technology Services's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcore_team_member%2F11475224%2Fphoto%2Foptimized%2FRobert-fd3cf7e1c788bcc009dcaae998d1e641.png) CEO, Technology Services ![Delivery Manager's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcore_team_member%2F9811838%2Fphoto%2Foptimized%2FRachael%2520Karaffa-e7a224854e886621a651a358add426e9.png) Delivery Manager ![Mobile QA Engineer's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035842%2Fimage_url%2Foptimized%2FEnzo%2520Heredia-6f5918f690d7810ff3cfaff246a1d639.png) Mobile QA Engineer ![Mobile Test Automation Engineer's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035843%2Fimage_url%2Foptimized%2FSargis%2520Sargsyan-0cfc445418f173c4a28262a281ed0208.png) Mobile Test Automation Engineer ![Mobile App Tester Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035844%2Fimage_url%2Foptimized%2FSeema%2520K%2520Nair-04ef7a804a6da1b3938ae1762464348d.png) Mobile App Tester Expert ![Regression Testing Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035845%2Fimage_url%2Foptimized%2FDimitris_Karavias-545aef488e8b65b20eccd69be229189c.png) Regression Testing Expert ![Mobile App Tester Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035846%2Fimage_url%2Foptimized%2FDolly%2520Arora-3fd7cc64eaf4180e91d7d0b5cc4fbe70.png) Mobile App Tester Expert ![Mobile Security Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035847%2Fimage_url%2Foptimized%2FCarl_Brown-8756a7bdd191329aae11e7c6ba3517d1.png) Mobile Security Expert ![Robert Orshaw](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcore_team_member%2F11475224%2Fphoto%2Foptimized%2FRobert-fd3cf7e1c788bcc009dcaae998d1e641.png) [Robert Orshaw](https://www.linkedin.com/in/robert-orshaw-97028b1a/) ![Toptal Logo](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe1d52ae643f59f7c.svg) CEO, Technology Services As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies. Previously at ![Deloitte](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_core_team_member%2F9500795%2Flogo%2Foptimized%2FDeloitte-2a6cc4d4d2406822cb3568c948c51699.svg) Technology Experience 35+ Years ![Rachael Karaffa](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcore_team_member%2F9811838%2Fphoto%2Foptimized%2FRachael%2520Karaffa-e7a224854e886621a651a358add426e9.png) [Rachael Karaffa](https://www.linkedin.com/in/rachael-karaffa-0b880815b/) ![Toptal Logo](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe1d52ae643f59f7c.svg) Delivery Manager Rachael serves as a Delivery Manager at Toptal with a focus on leading diverse global teams in developing innovative solutions for our clients. She works across multiple disciplines, including technology, marketing, and management consulting. Rachael specializes in managing people and client relationships, process optimization, and driving teams toward optimal business outcomes. Previously Managed Client ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_core_team_member%2F6370656%2Flogo%2Foptimized%2FVolvo_-e7daeda07eb8391f41cfdf65a2640c21.svg) Experience 9+ Years ![Enzo Heredia](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035842%2Fimage_url%2Foptimized%2FEnzo%2520Heredia-6f5918f690d7810ff3cfaff246a1d639.png) [Enzo Heredia](https://www.toptal.com/developers/resume/enzo-heredia) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 18+ Years of Experience Mobile QA Engineer Enzo is an engineer with more than 18 years of experience in QA and QA automation; he has worked with the latest technologies and highest industry quality standards to automate web UIs, REST APIs, and back-end services. He’s comfortable in startups as well as large companies, either as the only person in a QA role or a member of any size team. He also has experience defining processes, procedures, and tools to achieve the best quality. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035842%2Flogo_url%2Foptimized%2FGoogle%2520%25281%2529-c9662d766df20dbc8ea25251680a97e5.svg) ![Sargis Sargsyan](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035843%2Fimage_url%2Foptimized%2FSargis%2520Sargsyan-0cfc445418f173c4a28262a281ed0208.png) [Sargis Sargsyan](https://www.toptal.com/developers/resume/sargis-sargsyan) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 13+ Years of Experience Mobile Test Automation Engineer Sargis is a QA engineer and currently a director of quality engineering with more than 13 years of experience and deep expertise in test automation. He has worked with companies specializing in mobile, web, SaaS, and enterprise applications. Sargis has been an excellent asset to distributed international teams, he is an advocate for the Agile methodology, and a skilled practitioner of Agile, Scrum, and Kanban. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035843%2Flogo_url%2Foptimized%2FAdobe%2520workfront-72ff07aa868f0891c2f7dd9dc4bf928e.svg) ![Seema K Nair](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035844%2Fimage_url%2Foptimized%2FSeema%2520K%2520Nair-04ef7a804a6da1b3938ae1762464348d.png) [Seema K Nair](https://www.toptal.com/developers/resume/seema-k-nair) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 20+ Years of Experience Mobile App Tester Expert Seema brings more than 20 years of software testing and quality assurance expertise to the table. She has substantial experience with manual testing and the test automation of web and mobile applications. Seema is a certified Scrum master, an IBM-certified Db2 professional, and an AWS-certified solutions architect comfortable with Agile and Waterfall approaches. Her in-depth knowledge of API and performance testing delivers excellent results. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035844%2Flogo_url%2Foptimized%2FDell-5964f9d606cc434e51fd000182210d1c.svg) ![Dimitrios Karavias](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035845%2Fimage_url%2Foptimized%2FDimitris_Karavias-545aef488e8b65b20eccd69be229189c.png) [Dimitrios Karavias](https://www.toptal.com/developers/resume/dimitris-karavias) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 12+ Years of Experience Regression Testing Expert Dimitris is a QA automation architect focused on de-risking clients’ technical investments by upskilling teams and automating processes. He particularly enjoyed his four years at Novoda, the mobile agency, where he worked on challenging projects with no existing testing practices. Dimitris has set up clients’ QA teams from scratch and developed his leadership skills. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035845%2Flogo_url%2Foptimized%2FDuolingo__1_-971d6ded3802b980bcbb01f46fd80270.svg) ![Dolly Arora](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035846%2Fimage_url%2Foptimized%2FDolly%2520Arora-3fd7cc64eaf4180e91d7d0b5cc4fbe70.png) [Dolly Arora](https://www.toptal.com/developers/resume/dolly-arora) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 11+ Years of Experience Mobile App Tester Expert Dolly is a QA engineer with more than 11 years of experience in a range of industries, including real estate, travel, finance, and aviation. She has created multiple testing frameworks from the ground up using Selenium, TestNG, Cucumber, and Cypress, and has automated QA processes. Dolly manages test execution not only from the technical point of view but also from the customer’s, as she believes product usability is as vital as functionality. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035846%2Flogo_url%2Foptimized%2FAccenture-aa79c23f4b056ae4cd83ca569d6a2f97.svg) ![Carl Brown](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035847%2Fimage_url%2Foptimized%2FCarl_Brown-8756a7bdd191329aae11e7c6ba3517d1.png) [Carl Brown](https://www.toptal.com/developers/resume/carl-brown) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 20+ Years of Experience Mobile Security Expert Carl is a senior security architect with multiple decades of experience building security standards, developing security solutions, and ensuring the appropriate security controls are in place and functioning as designed before a project and infrastructure move into production. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035847%2Flogo_url%2Foptimized%2FNASA_Worm_logo_1-937cfcf0862d4615f6143309254c01ef.svg) On-demand Talent and Teams 30,000+ vetted professionals, ready to deploy individually or in teams. ![Mobile Product Manager's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F8682252%2Fimage_url%2Foptimized%2FMario%2520Hoek-641e19e85f2c2456fe5ae1f66d3d6af5.png) Mobile Product Manager ![Mobile Performance Tester's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035851%2Fimage_url%2Foptimized%2FAdrian%2520Lachowski-c4530250196aef2e3d8a1f836657c787.png) Mobile Performance Tester ![Mobile App Tester Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035848%2Fimage_url%2Foptimized%2FChieko%2520Higashi-3a46c912124864b87ee5f2e6e52439a1.png) Mobile App Tester Expert ![iOS Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035852%2Fimage_url%2Foptimized%2FMehul%2520Dhorda_-965236b1d569660c0584d2cf5a0892f3.png) iOS Expert ![Android Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035849%2Fimage_url%2Foptimized%2FKevin%2520Lo_-5e2fca1e1c9eca7417089678ae42bcbb.png) Android Expert ![Mobile Security Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035850%2Fimage_url%2Foptimized%2FClaudio%2520Nazzari-1958fc35925319d7b52d2b4e127681f6.png) Mobile Security Expert ![Mobile App Test Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035853%2Fimage_url%2Foptimized%2FNatalya%2520Rymarava-048556b8303873af20905e58f30f20af.png) Mobile App Test Expert ![Regression Testing Expert's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035854%2Fimage_url%2Foptimized%2FHarish%2520Meeran%2520Mohamed_-286a886d2756d7da019d4717d6484647.png) Regression Testing Expert ![Manual QA Engineer's avatar](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035855%2Fimage_url%2Foptimized%2FAlejandro_Restrepo_Mu_oz-956c06eb01e5f8d6659606f09ae3b947.png) Manual QA Engineer ![Mario Hoek](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F8682252%2Fimage_url%2Foptimized%2FMario%2520Hoek-641e19e85f2c2456fe5ae1f66d3d6af5.png) **Verified Expert** in Product Management ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 35+ Years of Experience Mobile Product Manager Mario is a seasoned, customer-driven professional with more than 35 years of experience in the management of digital transformation projects, developing, planning, and launching products in the telecommunications, financial, and media industries. He has helped companies create winning digital strategies and design world-class user experiences. Mario’s clients include Sony, Virgin Mobile, Monsanto, Huawei, and Blackberry. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F8682252%2Flogo_url%2Foptimized%2Fhuawei-10577d3bbec27a38ba9fb8ae21e5e1bd.svg) ![Adrian Lachowski](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035851%2Fimage_url%2Foptimized%2FAdrian%2520Lachowski-c4530250196aef2e3d8a1f836657c787.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 10+ Years of Experience Mobile Performance Tester Since 2014, Adrian has been developing using Java and a variety of testing frameworks such as JUnit, TestNG, Selenium, Cucumber, and REST Assured, along with tools like JMeter, SoapUI, and IntelliJ IDEA. He has worked with numerous teams and projects, which enables him to communicate easily and adapt seamlessly to new work environments. Adrian is passionate about test automation and has joined Toptal to broaden the reach of his expertise through freelance projects globally. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035851%2Flogo_url%2Foptimized%2FHSBC-c6b2cd8c9381c5113bdc2890db7f6c65.svg) ![Chieko Higashi](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035848%2Fimage_url%2Foptimized%2FChieko%2520Higashi-3a46c912124864b87ee5f2e6e52439a1.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 19+ Years of Experience Mobile App Tester Expert Chieko is a senior QA engineer with more than 19 years of experience testing software in various industries such as apparel, fintech, and security. She’s led teams in the implementation of software QA, test automation, and manual QA, as well as managing QA test plans to ensure that the end product is robust and high-quality. Chieko is passionate about achieving quality by following good development and QA processes and is wholeheartedly dedicated to ensuring that software meets the customers’ needs. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035848%2Flogo_url%2Foptimized%2FMcAfee-f6183d015f981b8cbe6c9de628c68cfb.svg) ![Mehul Dhorda](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035852%2Fimage_url%2Foptimized%2FMehul%2520Dhorda_-965236b1d569660c0584d2cf5a0892f3.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 11+ Years of Experience iOS Expert Mehul is a full-stack engineer with more than 11 years of professional experience, specializing in iOS development for the last seven years. He has led consumer-facing projects impacting millions of Uber, BlackBerry, and Bolt users. His professional background includes working with various technologies, including iOS, web, back-end, and desktop. Mehul is eager to take on iOS projects where he can leverage his experience to drive projects forward efficiently and with high-quality work. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035852%2Flogo_url%2Foptimized%2FUber%2520Logo-775cd1590f9f7384ab6c0b50d66ff068.svg) ![Kevin Lo](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035849%2Fimage_url%2Foptimized%2FKevin%2520Lo_-5e2fca1e1c9eca7417089678ae42bcbb.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 16+ Years of Experience Android Expert Kevin has extensive experience in hands-on development in the Android mobile native space and with technical project and product management. His technical knowledge and cross-functional skills have been honed throughout his career at various startup and larger-sized companies, and he has a proven track record of delivering results that drive business growth. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035849%2Flogo_url%2Foptimized%2FIBM-7163d90025a9c8d463a219785c2f609c.svg) ![Claudio Nazzari](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035850%2Fimage_url%2Foptimized%2FClaudio%2520Nazzari-1958fc35925319d7b52d2b4e127681f6.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 18+ Years of Experience Mobile Security Expert Claudio has more than 18 years of software development experience and a cybersecurity degree. He has worked in back-end, front-end, and full-stack development; DevSecOps; application security; penetration testing; and solutions architecture. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035850%2Flogo_url%2Foptimized%2FAccenture-aa79c23f4b056ae4cd83ca569d6a2f97.svg) ![Natalya Rymarava](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035853%2Fimage_url%2Foptimized%2FNatalya%2520Rymarava-048556b8303873af20905e58f30f20af.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 11+ Years of Experience Mobile App Test Expert Natalya is a QA engineer experienced in testing web, hybrid, native mobile, and desktop applications. She has worked in various business domains, including fintech, finance, medicine, and telecommunications, testing front-end and back-end parts and different console applications. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035853%2Flogo_url%2Foptimized%2Fa1qa-3e46f6fe08d2c128df6e38151c5a96dc.svg) ![Harish Meeran Mohamed](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035854%2Fimage_url%2Foptimized%2FHarish%2520Meeran%2520Mohamed_-286a886d2756d7da019d4717d6484647.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 12+ Years of Experience Regression Testing Expert Harish is a QA professional with more than 12 years in different QA roles, including test automation, test management, test analyst, test lead, manual testing, and scrum master. He specializes in different testing levels (unit/API/E2E) and testing types (functional, performance, security) for mobility, web, APIs, and legacy mainframes applications. With a solution-oriented mindset and a customer-centric focus, Harish is a team player who enjoys working with people following the Lean and Agile approaches. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035854%2Flogo_url%2Foptimized%2Fimages-2-b29d84a756835c9a0d703594f22c4fb6.svg) ![Alejandro Restrepo Muñoz](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035855%2Fimage_url%2Foptimized%2FAlejandro_Restrepo_Mu_oz-956c06eb01e5f8d6659606f09ae3b947.png) **Verified Expert** in Engineering ![Experience Icon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fe3a3a80c29a34881.svg) 6+ Years of Experience Manual QA Engineer Alejandro is a QA engineer with more than six years of experience in manual and automated testing for web and mobile applications within the banking and fintech sectors. He has experience designing, building, executing, and maintaining automated tests, including API testing and integration with the CI/CD methodology. Alejandro is self-sufficient and has taught himself various stacks, making him efficient in implementing technologies, tools, or techniques needed for the team or the client. Previously at ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Fcustomized_solutions_talent%2F11035855%2Flogo_url%2Foptimized%2FAccenture-aa79c23f4b056ae4cd83ca569d6a2f97.svg) Looking for guidance about the perfect mobile app testing services for your needs? Looking for guidance about the perfect mobile app testing services for your needs? UNRIVALED EXPERTISE ## Our Talent Has Worked With Top Companies Having previously worked with these leading global companies, our talent brings valuable insights and expertise to deliver world-class outcomes. Why organizations choose us ## Toptal in Action Discover the cutting-edge benefits our clients enjoy from the global Toptal network. * * * ![Toptal helps Calm achieve better production stability with EKS on AWS.](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Ffeatured_case_study_section%2Ffeatured_case_study%2Fcase_study%2F10207492%2Fimage%2Foptimized%2Fimages-237562767d8eafc3e48610d79edbf02b.jpeg) ### Toptal helps Calm achieve better production stability with EKS on AWS. **Challenge:** Calm’s existing Kubernetes infrastructure became a source of operational risk as the company scaled. Following a significant outage, the company needed a more reliable platform that could support ongoing growth without compromising stability. **Solution:** Toptal was able to immediately help Calm’s team build a new, fully automated cluster to be managed by Amazon Web Services (AWS), running under AWS’s new Elastic Kubernetes Services (EKS). **Outcome:** Calm benefited from improved stability, reliable networking, and elimination of costly outages. In the months since, the company has been able to easily absorb significant revenue growth without performance issues. Toptal’s work was a crucial milestone that enabled us to scale our engineering teams and systems in step with our rapid growth. Mark Marcantano Technical Program Manager ![](https://assets.toptal.io/images?url=https%3A%2F%2Fbs-uploads.toptal.io%2Fblackfish-uploads%2Fcomponents%2Ffeatured_case_study_section%2Ffeatured_case_study%2Fcase_study%2F10207492%2Flogo%2Foptimized%2FCalm-6f1ee7b5eacd9f8df8ff2fe7a0a055e0.svg) [Read Full Case Study](https://www.toptal.com/case-study/calm-aws-eks-infrastructure-rebuilt-in-3-days) ![](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F6b4393fdb4ec7e6a.svg) * * * ![](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fdf3a66ccf7513cc2.svg) ## Toptal Ranked #1 Most Reliable Professional Services Company in America Newsweek and Statista’s rankings were based on an independent survey of more than 2,400 decision-makers at Fortune 500s. ![](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F168be0eb07c867d4.svg) Newsweek's Most Reliable Companies in America 2026 ranking. Toptal is ranked #11, the highest-ranked professional services firm. 1 ![Microsoft](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F887ef356a9c50010.svg) 2 ![IBM](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F8fec608d9327e3cd.svg) 3 ![Amazon](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Febea28a775627411.svg) 11 ![Toptal](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F686db681353f9ec3.svg) 12 ![Adobe](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fb4e5321bb99bec2b.svg) 33 ![Accenture](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fef8e62bb426a30d7.svg) 39 ![Deloitte](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2Fc5a40f7535bd9173.svg) 66 ![Cognizant](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F4f5d46f8e2dc9dfb.svg) 80 ![McKinsey & Company](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F451aedae824c922b.svg) 101 ![KPMG](https://assets.toptal.io/images?url=https%3A%2F%2Ffrontier-assets.toptal.com%2F5c00dc9b26468c00.svg) Highest ranked across all industries Other Professional Services [See the **Most Reliable Companies** in America](https://rankings.newsweek.com/americas-most-reliable-companies-2026) OUR THOUGHT LEADERSHIP ## Explore Insights From the Mobile App Testing Field Read the latest articles and resources to keep you current on emerging trends in mobile app design, testing, and more. ![Apply These QA Techniques to Improve Your Product Development Process](https://bs-uploads.toptal.io/blackfish-uploads/components/blog_post_page/6000174/cover_image/optimized/Untitled-dfc9850dc3be654d0fcac5026a22badc.png) ![Andy Chiang](https://bs-uploads.toptal.io/blackfish-uploads/talent/479573/picture/retina_238x238/huge_ee2e387639d430db5b25bf78b2ccc850-bc27c3bece0ae692c6038df0d0e798c9.jpg) Andy is a product manager and technology expert who helps businesses, from startups to global corporations, scale teams and increase revenue. His previous roles include Director of Supply Chain Strategy at Gap Inc. and Director of Product Management at Coupa, which was featured on the Fortune Future 50 index in 2021. Expertise Previously at ![Gap Inc.](https://bs-uploads.toptal.io/blackfish-uploads/components/previous_company/6192293/logo/optimized/Gap_Inc-527595f9540299d90f04243658388db3.svg)![Coupa](https://bs-uploads.toptal.io/blackfish-uploads/components/previous_company/6192289/logo/optimized/Coupa-1711e91f36cbe9af26bd87d6506766fe.svg) **Verified Expert** in Engineering Cameron Chapman **Verified Expert** in Engineering MOBILE APP TESTING SERVICES RELATED OFFERINGS ## Explore Related Services and Roles Pair Toptal’s Mobile App Testing Services with related competencies to effectively tackle your business challenges.