Senior SDET (QA Automation, TypeScript) Jobs

Serokell

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IT - Software Development

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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

Additional Information:

Job Posted:
December 12, 2025

Work Type:

Remote work

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Senior SDET (QA Automation, TypeScript)