We are hiring a Senior SDET to ensure the stability, reliability, and security of a blockchain-based product. You will own QA automation before and after launch, build and evolve TypeScript-first test suites, and work closely with developers and DevOps in fast release cycles. Strong TypeScript programming matters more than operating specific tools.

Responsibilities

• Own QA automation from pre-launch through post-launch stabilization.
• Build and maintain TypeScript-first suites with Playwright, Jest, and Node-based tooling.
• Design scalable API, UI, and CLI automation with clear, reliable signals at scale.
• Integrate tests into CI/CD (GitHub Actions, Docker; parallel pipelines) and enforce quality gates.
• Create and manage containerized test environments and test data (Docker, K8s).
• Validate functional correctness and protocol interoperability; support regulatory compliance checks where applicable.
• Author and maintain manual and automated test cases where they add value; keep documentation current.
• Log, triage, track, and re-test defects in the agreed issue tracker.
• Participate in release readiness reviews and sign-off.
• Perform security testing and collaborate with engineers to drive fixes.
• Use advanced Git workflows in day-to-day collaboration.

Requirements

Must-have

• 5+ years of QA experience in blockchain or fintech.
• Strong TypeScript automation expertise (Playwright, Jest, Node-based frameworks).
• Deep understanding of TypeScript fundamentals, SOLID principles, and core data structures.
• Proven API / UI / CLI automation at scale.
• Security testing experience.
• CI/CD integration experience (GitHub Actions, Docker; parallel pipelines).
• Advanced Git proficiency.

Nice-to-have

• Rust familiarity.
• Performance and load testing (k6).
• Smart contract / DApp QA (Hardhat, Foundry, ethers.js, viem).
• Web3 QA on major chains (Ethereum, Bitcoin, Solana, etc.).
• Blockchain node and RPC testing, event verification.
• Containerized test environments (Docker, K8s).
• Experience with privacy-preserving or privacy-focused systems and protocols.
• Experience working in regulated environments or aligning QA with regulatory compliance.

How we work

• Fully remote. EU-friendly hours with short daily syncs; mostly async outside that window.

What we offer

• Competitive contractor compensation.
• International Web3 projects.
• Fully remote work and flexible hours.
• Conference participation and publishing opportunities.
• Mentoring, training, and real career growth.
• Supportive, multicultural team.

What will help you stand out

• Evidence of TypeScript automation you’ve written (links or samples).
• Solid CI examples (parallel pipelines, containerized runners, caching strategy).
• Clear, proactive communication: you seek missing details, clarify undocumented areas, and help improve documentation.