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Senior QA Engineer - Crypto DeFi & Backend APIs (EMEA)
- New York, New York, United States
- New York, New York, United States
Über
Please note: This role requires you to be located in EMEA. Your application will not be considered otherwise.
What you’ll do
Review and interpret DeFi protocol documentation and Solidity contracts to understand expected on-chain behavior
Validate the correctness of Zap VM executions by ensuring that both the inputs and outputs match the expected behavior of the underlying DeFi protocol’s smart contracts
Design and implement robust testing strategies for backend services, REST APIs, and protocol integrations
Collaborate with the QA team to uphold and evolve our testing standards across plugin development and compiler workflows
Ensure newly added features and protocol integrations meet strict quality and correctness criteria
Track, manage, and drive resolution for bugs—especially those related to protocol behavior, integration logic, and output discrepancies
Identify UX or product issues, communicate them clearly, and propose improvements
Work closely with the development team to ensure high-quality releases and consistent QA processes
Maintain clear and comprehensive test documentation, plans, and reports
Our tech stack:
TypeScript – for protocol integration plugins
Rust – powering the compiler service that converts TypeScript into instructions
Solidity – smart contracts deployed across EVM networks
DragonflyDB / Redis – caching and state layer
What makes you a good candidate
5+ years in QA, ideally focused on backend, API, or integration testing
Deep crypto-native understanding, including:
Ability to read DeFi protocol docs
Comfort interpreting Solidity contracts
Familiarity with on-chain transaction flows and protocol mechanics
Experience with Git, GitHub (Actions), TypeScript, Playwright, and Postman
Strong communication skills and the ability to work cross-functionally
Self-driven, detail-oriented, and able to work independently or collaboratively
Ability to understand development changes quickly and ensure compatibility across features
Bonus: experience with JIRA and QA automation tooling
A passion for DeFi and eagerness to continuously grow technically
We encourage you to apply if you feel your experience and skills equip you for this job but are not listed here!
Company culture
Embracing the differences
Embrace your own differences
Respect and welcome the unique qualities of others
See others’ differences as an opportunity to grow
Own it, do it
Own tasks end-to-end
Hold yourself to a high bar for execution
Make bold decisions, and be accountable
Understand your limitations and seek for help
Fail forward
Try - don’t be afraid to fail
Learn - don’t make the same mistake twice
Adapt - grow with the experience
Have fun together
Take the time to get to know and understand each other better
Don’t take yourself too seriously and keep it light-hearted
Fun should be coming from a place of love and respect
What you’ll get
Annual team offsites (Thailand in 2023 and Vietnam in 2024 were a blast, Marrakech in March 2025 was blast-ier; let’s see what happens in 2026!)
30 days of PTO
Flexible remote days
Flexible working hours
Equity participation from day 1
Entitlement to work computer (choice of equipment)
An annual 1,000€ personal development budget once you have worked 6+ months (pro-rated the first year)
A one-time 1,000€ remote budget to use on coworking, office setup, etc.
If you join us as an independent contractor, you’re only entitled to the first five benefits of this list.
Application process Setting yourself up for success starts with the application! Click here to discover valuable tips that will help you navigate our application process effectively.
LI.FI is an equal opportunity employer. We encourage individuals of all backgrounds to apply. Join us in our dedication to fostering a workplace that values and respects each team member's unique contributions.
Shortlisted candidates will undergo a comprehensive interview process, including a people operations interview, a take-home assignment, a meet-the-team & founder interview, and a reference check.
For more information, visit our page detailing our hiring process!
Apply Now:
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Sprachkenntnisse
- English
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