Mid Senior QA Engineer Jumper

A quick run-down of the job We’re looking for a Mid/Senior QA Engineer to raise the bar for quality across Jumper, shaping testing strategy, automation, and reliability for a product used by thousands of DeFi users every day. If you love catching the bugs before they hatch, bringing structure to complex systems, and working closely with engineers on something technically challenging and genuinely useful, this one’s for you. What you’ll do Take ownership of QA planning and execution across Jumper.Exchange’s core features; from UI to API to cross-chain integrations. Build, maintain, and scale automated testing frameworks with Playwright, Jest, and related tooling. Work closely with engineering, product, and security to review requirements, test new releases, and improve our processes. Investigate, reproduce, and help resolve production issues, driving real fixes, not just reports. Monitor quality metrics and help shape continuous improvement initiatives. Champion a “quality-first” mindset within the team, balancing speed with stability. What makes a good candidate 3+ years of experience in QA or software testing, ideally in a fast-moving product company. Strong hands‑on experience with Playwright and Jest for automated and integration testing. Solid foundation in API testing, CI/CD pipelines, and end‑to‑end quality practices. Experience or curiosity for blockchain, DeFi, or cross‑chain technologies. Great communication and collaboration skills, you’ll be working with distributed teams across engineering, product, and design. Analytical, detail‑oriented, and proactive in spotting and solving quality issues. Fluent in English and located within the EMEA timezone. Nice to have Familiarity with PostgreSQL and Redis for database and caching layer testing. Understanding of Ethereum‑based testing libraries (Viem, Wagmi). Experience in QA for high‑traffic or fintech/blockchain applications. 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. 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. #J-18808-Ljbffr