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Top freelance Testing developers available to hire

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Freelance Testing Developer - Michael Ayoub
Freelance Testing Developer5.0 (71 reviews)

I’m Michael Ayoub, a Solution Architect and Innovation Leader with over 15 years of experience delivering complex, scalable, and secure technology solutions across fintech, banking, aviation, and enterprise platforms. I specialize in digital transformation, payment systems, enterprise architecture (TOGAF), and product development, with hands-on leadership across B2B, B2C, and microfinance ecosystems. Having held senior roles in companies like Sharjah Airport, Banque Misr, Fawry, and CashCall, I bridge business goals with cutting-edge technology, driving innovation, operational efficiency, and regulatory compliance. Passionate about aligning IT strategy with business value, I thrive in dynamic, cross-functional environments and continuously explore emerging tech to fuel growth and competitive advantage.

Freelance Testing Developer - Lyle Poisson
Freelance Testing Developer

Senior data engineer specializing in financial data infrastructure, large-scale pipeline architecture, and cloud data systems on AWS/GCP/Snowflake. I build and fix data pipelines that handle real stakes — regulatory reporting, trading infrastructure, high-volume financial data — and I have a track record of measurable improvements: full data loads from 3 weeks to 6 hours, ingest times from 45 minutes to 3, query runtimes improved 500%. Recent work: 🏦 Lead data engineer at MSRB (US federal regulator, $4T municipal bond market): 30 ETL pipelines supporting $9B+ in daily trades, pricing data availability increased 800% across 2.7M securities 📦 Data infrastructure at Trafigura: serverless pipelines processing ~500GB of multi-domain financial, industrial, and geopolitical data 📑 Greenfield SEC filing pipeline: 20 years of filings across 4,000+ companies, structured for LLM querying ⚙️ DataPraxis: container-based ingestion platform (GCE/Docker/Kubernetes) reducing ingest time from 45 minutes to 3 🌍 Catalist: Productionizing machine learning models at 1,000,000x scale and implemented Cloudera colocation -> BigQuery transtion MS Applied Mathematics & Statistics, Johns Hopkins University.

Freelance Testing Developer - Pavneet Singh
Freelance Testing Developer5.0 (2232 reviews)

I am an adept **Full Stack Software Engineer and Architect** and with a wealth of experience in frontend, backend, and Data Structures and Algorithms (DSA) solution development. My expertise spans **clean architecture, TDD(test driven development), code reviews, debugging, and profiling**, enabling the delivery of high-quality solutions within constrained short timeframes. I have worked and collaborated with numerous prominent global blue chip corporations, startups, and international clients. Additionally, have made substantial contributions to Pluralsight and Stack Overflow, boasting a reputation exceeding 37k+ and ranking within the top 0.30% of users on the latter platform. Motto: Full refund in case of no help. Discounts: - Student discount is applied automatically. • Senior software engineer, have worked as a Subject Matter Expert and lead with the primary role to develop features, solve complex bugs, architecture refinements, feature integration, and development. • I intent to deliver a top-quality experience by delivering the most optimal solutions and guidance to enlighten the learners. • I have helped many developers to fix critical bugs and implement complex features on the Codementor platform. • Teaching is one of passing and I have helped numerous mentees on their journey to become successful developers in various fields such as web, native mobile, and big data. • I have expertise in curating and simplifying the content to deliver the best experience with different analogies. • I am deft at feature implementation, debugging, and refactoring. If you have any questions, Feel free to reach out, looking forward to meeting you.

Freelance Testing Developer - Rengaraj
Freelance Testing Developer5.0 (2 reviews)

I have experience in Python for more than 10+ years. I have been using Python in Embedded systems. I have experience in Making Test setup for various Embedded device for automation testing.

Freelance Testing Developer - Jose Antonio Such Llinas
Freelance Testing Developer5.0 (134 reviews)

Hi everyone! I am a Software and QA Architect with a strong background on designing, developing and testing complex applications. Currently, I am the Head of QA of an insurtech company, which is a really exciting sector inside the software development industry. In my daily basis I perform both Software and QA Leadership tasks as well Software And Automation Architecturing, as well as designing Unit tests, Integration, and so on. My main goal is to help organizations and individuals to achieve the maximum level of quality in terms of development and automated testing.

Freelance Testing Developer - Manish Kumar
Freelance Testing Developer5.0 (19 reviews)

- I am expert in Test automation. I have created regression pack using various technologies like: **restassured**, okhttpclient, restTemplate, selenium, page object model using page factory, cucumber, extent report) - I have delivered many selenium/API automation project successfully . - I have 12 year experience in API/frontend automation. ( started working from soap request and qtp ;) ) - I can **integrate regression pack** with Jenkins and schedule it. - I can build a stable automation suite, which will simplify onboarding of new APIs/Pages. - I can also do performance testing using open source tool Jmeter - UI and API Development using Python, **Flask Framework**: - Developed an internal utility for data analysis of Jira - This includes libraries like request, Flask-Login, Flask-Form, Flask bootstrap. - Also experienced in developing APIs using Flask-RESTful

Freelance Testing Developer - Ayush Goel
Freelance Testing Developer5.0 (12 reviews)

I am eager to share my decade of expertise in software testing and development as a Codementor. With significant experience in automation and manual testing, I aim to guide aspiring developers and testers. Certified in ISTQB and experienced in leading teams and developing testing frameworks, I find joy in elevating others’ skills. Joining Codementor allows me to extend this mentorship globally, helping professionals enhance their abilities and meet industry standards

Freelance Testing Developer - Bolaji Salau
Freelance Testing Developer5.0 (10 reviews)

I am a seasoned software developer with years of experience in designing, developing, and deliveringhigh-quality web and enterprise solutions. My capacities span a wide range of technologies including; cloud computing, microservices, enterprise solutions development, server systems, messaging systems, database systems, containerization, CI/CD, data engineering andenterprise development. * 15+ years experience in designing, developing and managing web and enterprise applications as a senior full stack developer in various domains. * Extensive work experience involvement in all phases of Software Development Life Cycle (SDLC) starting with project initiation, requirement gathering, requirement analysis, functional design, systems design, coding and implementation of multi tier enterprise solutions using Agile and SCRUM methodology. * Extensive experience in Java, Jakarta EE technologies such as JDBC, JSP, Servlets, Spring Framework (Spring Boot, Spring IOC, Spring AOP, Spring MVC, Spring Cloud, Spring Security, Spring Data JPA, Spring Cache, Hibernate, activeMQ etc). * Extensive experience in the implementation of Event Driven, RESTful APIs and Microservices using spring boot and spring cloud. * Experienced in developing UI or frontend based applications with JSP, EL and React.js. * Extensive use of Docker containers to dockerize applications into images for CI/CD applications pipeline setup, to run tests in sandboxed environments for consistent test runs, on local and continuous integration to staging and production environments.

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Frequently asked questions

How long do Testing projects normally take?

The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Testing project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Testing request on Codementor, check out our article.

How much does it cost to hire a freelance Testing developer?

We don’t charge anything when you post a freelance hiring request for Testing developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.

What makes Codementor Testing developers different?

We do a comprehensive technical and communications screen of all Testing developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Testing developers’ user satisfaction rates.

What happens if I’m not happy with the freelancer’s work?

As a platform, we strive to ensure you’re always happy with your Testing project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.

For more answers to frequently asked questions, see here.

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