Senior QA Automation Engineer (TypeScript, Web3)

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

Responsibilities

• Support QA activities pre-launch and through post-launch stabilization.
• Ensure functional correctness, protocol interoperability, and regulatory compliance.
• Author and maintain manual and automated test cases.
• Perform functional, non-functional, unit, API, system, and integration tests.
• Plan and execute performance, load, and security testing.
• Collaborate with DevOps to keep test environments and CI/CD pipelines reliable.
• Log, track, and re-test defects in the agreed issue tracker.
• Participate in release readiness reviews and sign-off.

Requirements

• 5+ years of QA experience in blockchain/fintech.
• Strong TypeScript testing experience; you can write clean TS code.
• Hands-on QA for smart contracts and DApps.
• Proven API/UI/CLI automation experience.
• Experience with performance, load, and security testing.
• Familiarity with privacy-focused systems or protocols.
• Web3 QA background across major L1/L2 ecosystems.
• Rust familiarity is a plus.

How we work

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

What we offer

• Competitive contract compensation.
• International Web3 projects.
• Fully remote work and flexible hours.
• Conference participation and publishing opportunities.
• Mentoring, training, and real career growth.
• Supportive, multicultural team and therapy sessions for well-being.

What will help you stand out

• Security mindset for Web3 systems.
• Clear, proactive communication: you seek missing details, clarify undocumented areas, and help improve documentation.
• Evidence of TypeScript automation you’ve written (links or samples).

By joining Serokell, you’ll become part of a warm community of ingenious engineers, computer scientists, designers, marketers, and other inventive people. You’ll take part in ambitious projects that build the next generation of computer software, explore bold initiatives free from bureaucracy, and enjoy our Slack channels that range from #music to #philosophyandtears (did we mention our extensive custom emoji set?).