Middle QA Engineer

Debifi; United States; Remote; USD 90,000 - 140,000; Full time

Benefits offered by this job

Fully remote work

Annual professional development budget

Performance-based bonuses

Flexible schedule

20 paid vacation days

Job summary

Debifi is seeking a Middle QA Engineer to help shape the future of decentralized finance through secure, high-performance testing of fintech products used by 100,000+ users worldwide.

You will perform manual testing, API testing, and develop E2E automated tests using Playwright or similar frameworks, with a focus on native/hybrid mobile apps and robust bug documentation. This is a fully remote position with global collaboration.

Qualifications

• 2+ years of experience in manual functional, regression, and exploratory testing of web applications.
• Strong API testing and debugging skills using Postman, Swagger, Fiddler, or similar tools.
• Experience building, running, and maintaining End-to-End automated tests (UI and/or API checks) with Playwright, Cypress, Selenium, or RestAssured.
• Basic programming skills (JS, Python, Java, Ruby, etc.) to support test automation.
• Familiarity with security principles and detecting vulnerabilities (XSS, SQLi) during testing.
• Proficient in Jira and writing detailed bug reports and test documentation.
• Experience testing native and/or hybrid mobile apps (iOS/Android).
• Expert-level knowledge of browser developer tools for network and element analysis.
• Understanding of web app testing, SDLC, and client-server architectures.
• Proficiency in English for business communication and technical reading.
• Self-motivated, proactive, and able to work remotely in an asynchronous setup.

Responsibilities

• Perform manual functional, regression, and exploratory testing of web applications.
• Execute API testing using Postman, Swagger, Fiddler, or equivalent tools.
• Develop, run, and maintain End-to-End automated tests (Playwright or similar).
• Test native and/or hybrid mobile apps (iOS/Android).
• Log and document defects in Jira with clear bug reports.
• Create and update test documentation (test cases, checklists).
• Analyze browser dev tools data, network traffic, and logs during testing.
• Collaborate with the development team and management in an async remote environment.

Skills

Manual testing

API testing

UI testing

Programming basics

Security testing

Bug reporting

Jira proficiency

Mobile testing

Browser dev tools

SDLC knowledge

Tools

Postman

Swagger

Fiddler

Playwright

Cypress

Selenium

RestAssured

Job description

About Debifi

At Debifi, we live under the mantra “Own your money.

” We believe in the transformative power of Bitcoin - not just as an asset, but as a foundation for true financial independence. Our Philosophy, “Never sell. Borrow.”, empowers Bitcoin holders to unlock liquidity without parting with their assets. Through our non-custodial lending solutions, we enable users to “Hold Your Keys” and stay in full control of their Bitcoin while accessing the financial flexibility they need.

We are building the future of decentralized finance - one where Bitcoin becomes supercollateral and financial sovereignty is the norm.

The Role

As a Middle QA Engineer at Debifi, you will help build the future of decentralized finance by developing secure, high-performance systems. You will work on fintech products used by more than 100,000 people globally, contributing to non-custodial Bitcoin lending solutions where Financial sovereignty is the norm. In this role, you’ll collaborate closely with a small, focused team to create scalable, reliable services. We’re looking for developers for long-term cooperation who are passionate about Bitcoin, clean code, and shaping the next generation of financial products.

Responsibilities

• Performing manual functional, regression, and exploratory testing of web applications.
• Executing API testing using tools like Postman/Fiddler or their equivalents.
• Developing, running, and maintaining End-to-End (E2E) automated tests (primarily using Playwright or similar frameworks).
• Testing native and/or hybrid mobile applications (iOS/Android).
• Testing native and/or hybrid mobile applications (iOS/Android).
• Properly logging and documenting found defects (bug reports) in a project management system (e.g., Jira).
• Creating and updating test documentation (test cases, checklists).
• Creating and updating test documentation (test cases, checklists).
• Debugging and analysis: using browser developer tools to inspect elements, view stored data, and analyze network traffic during testing.
• Effective written communication in English (including managing tasks in Jira).

Future Responsibilities / Growth Potential (Nice to Have)

• Active learning and filling knowledge gaps according to project needs and your personal development plan.
• Participating in data quality and integrity validation, functional testing of machine learning models, and their monitoring in a production environment.
• Learning and implementing test automation for native/hybrid mobile applications (e.g., using Appium, XCUITest, Espresso).

About You

• 2+ years of experience in manual functional, regression, and exploratory testing of web applications.
• Solid experience in API testing and debugging using Postman, Swagger, Fiddler, or similar tools; understanding of REST/SOAP principles.
• Experience in developing, running, and maintaining End-to-End (E2E) automated tests (including UI and/or API/integration checks) using frameworks such as Playwright, Cypress, Selenium, or RestAssured.
• Basic programming skills (JS, Python, Java, Ruby, etc.) to work with the test automation stack.
• Basic understanding of security principles and experience in detecting common vulnerabilities (XSS, SQLi, etc.) during manual testing.
• Strong proficiency in project management systems (e.g., Jira) and skills in writing detailed bug reports and test documentation (test cases, checklists).
• Experience testing native and/or hybrid mobile applications (iOS/Android).
• Expert-level knowledge of browser developer tools (network traffic analysis, element inspection, viewing saved data, etc.).
• Deep understanding of web application testing principles, SDLC, and client-server architecture.
• English proficiency sufficient for business correspondence, reading technical documentation, and discussing tasks in corporate chats (Upper-Intermediate preferred).
• Proactivity, strong analytical skills, ability to solve complex problems independently, and effective collaboration with the development team and management.
• Willingness to quickly fill knowledge gaps and learn new technologies.
• High level of self-organization and productivity in a fully remote and asynchronous communication environment.

Nice to have

• Basic understanding of machine learning principles and approaches to testing ML models.
• Experience in testing Fintech products, particularly platforms dealing with cryptocurrencies or virtual assets.
• Experience in test automation for native and/or hybrid mobile apps using modern frameworks (e.g., Appium, XCUITest, Espresso).

Compensation and Benefits

• Salary range is location and seniority-determined
• Annual professional development budget
• Option to participate in business trips and in specialized conferences
• Corporate reward system and performance-based bonuses
• Referral bonuses for bringing in a new team member
• Opportunities for both vertical and horizontal career growth
• Fully remote work and a flexible schedule
• 20 working days of paid vacation