Software Testing Engineer
We are seeking a skilled and passionate Software Testing Engineer to join our innovative blockchain project team. This role focuses on hands-on testing, maintaining test automation frameworks, and ensuring high-quality releases. The ideal candidate will have a strong background in QA Automation and blockchain domain knowledge.
You will
Work independently with a strong desire to improve existing solutions
Create, manage, and optimize automated testing frameworks, ensuring our products' continuous and flawless updates
Understand business scenarios and tech design, design and develop auto tests
Collaborate with a tech lead and engineering team to meet technical requirements and deliver on project goals
Prioritize sharp & iterative delivery on tight deadlines
Stay updated with new trends and best practices specifically with a focus on scaling blockchain infrastructure and performing systematic testing
What you bring
5+ years of experience in software testing
Strong knowledge of Node.js/TS, Playwright, Jest, Synpress
Strong knowledge of functional / non-functional testing
Performance testing
Excel in communication and collaboration across teams
Desire to have skin in the game & make it big
Nice to have
Experience in blockchain domain
Experience in finance domain
Understanding of Prediction Markets
Previous work in a startup or product-focused environment, especially in DeFi
Passion for decentralization and the broader impact of blockchain on industries
Experience using prediction markets or understanding of how they function
Tech stack
Frontend
Typescript, Node.js, Next.js
ChakraUI / Tailwind.css
Axios, React-query, GraphQL / Apollo
React context, React hooks
Wagmi, Web3Auth
Account Abstraction - Pimlico
Jest, Vitest, Playwright
Eslint, Prettier, Husky
Backend
Typescript, Node.js, Nest.js
Gnosis Safe
Google Cloud
EVM
Solidity, TypeScript
Hardhat, Foundry
Mocha, Chai, Smock
OpenZeppelin Contracts, Ethers-v6, Typechain, Conditional Token Framework(CTF)
ESLint, Prettier, Husky
Benefits
Competitive option stock & salary based compensation
Unlimited PTO
Global team offsites
Professional development opportunities
Hardware (if needed)
Office in Lisbon
Published on: 5/7/2026

Limitless Labs
limitless.exchange is a prediction market app we’re scaling to viral, mainstream adoption. We processed more than $170M in trading volume, with a focus on financial markets like crypto, stocks & commodities. We have strong signs of PMF, with 40% 7 day retention among traders and the average trader spending 5.5hrs per week on the platform.
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