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Serokell Logo Serokell · IT - Software Development

Senior SDET (QA Automation, TypeScript)

· Job Posted December 12, 2025
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Job Description

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

Job Responsibility

  • Own QA automation from pre-launch through post-launch stabilization
  • Build and maintain TypeScript-first test suites (Playwright, Jest, Node-based tooling)
  • Design scalable API, UI, and CLI test coverage with reliable signals at scale
  • Integrate tests into CI/CD (GitHub Actions, Docker
  • parallel pipelines) and enforce quality gates
  • Create and manage containerized test environments (Docker, K8s) and test data
  • Validate functional correctness and protocol interoperability
  • verify critical on-chain/user flows (when in scope)
  • Author and maintain manual and automated test cases where needed
  • keep documentation current
  • Log, triage, track, and re-test defects in the agreed issue tracker
  • Drive release readiness reviews and sign-off processes
  • Collaborate closely with developers and DevOps
  • use advanced Git workflows
  • Perform security testing and contribute to secure-by-default test coverage
  • Support fast diagnosis and fixes for critical issues during stabilization after release

Requirements

  • 5+ years of QA 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 experience with 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 envs (Docker, K8s)

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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