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Serokell Logo Serokell · IT - Software Development

Middle SDET

· Job Posted December 12, 2025
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Job Description

We are looking for a Middle SDET (QA Automation) to join a team of fierce and fun Serokellers and help ensure the stability, reliability, and quality of a blockchain-based solution.

Job Responsibility

  • Support QA activities from pre-launch through stabilization after release
  • Build and maintain TypeScript-first automation (Playwright, Jest, Node-based tooling)
  • Design API, UI, and CLI test coverage with reliable, actionable signals
  • Integrate tests into CI/CD (GitHub Actions, Docker
  • basic pipelines) and keep them green
  • Collaborate with engineers/DevOps to provision containerized test environments and, when needed, ephemeral testnets
  • Author and maintain manual and automated test cases
  • keep test docs current
  • Log, triage, track, and re-test defects in the agreed issue tracker
  • Participate in release readiness reviews and sign-off
  • Use Git proficiently in day-to-day work (branching, merges, rebases, conflict resolution)

Requirements

  • 3+ years of QA in blockchain or fintech
  • TypeScript test automation experience (Playwright, Jest, Node-based frameworks)
  • Solid understanding of core data structures
  • Hands-on API / UI / CLI automation
  • CI/CD integration experience (GitHub Actions, Docker
  • basic pipelines)
  • Git proficiency (branching, merges, rebases, conflict resolution)

Nice to have

  • Rust familiarity
  • Performance and load testing (k6)
  • Security testing
  • 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 envs (Docker, K8s, ephemeral testnets)

What we offer

  • Competitive salary
  • Attractive international projects
  • Participation in the leading world conferences
  • International teams and multicultural environment
  • Fully remote work and flexible working hours
  • Possibility to take days off at any time you need
  • Investment in your professional and career growth, which will correspond to wage growth
  • Mentoring and training
  • Opportunity to contribute to one of the functional programming industry’s leading blogs
  • Therapy sessions to support your well-being
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