Software Testing Engineer
Lisbon Portugal, Remote
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:
- 3+ years of experience in software testing
- Strong knowledge of Node.js/TS, Playwright, Jest, Synpress
- Strong knowledge of functional / non-functional testing
- Experience in finance domain
- Excel in communication and collaboration across teams
- Desire to have skin in the game & make it big
Nice to have:
- Experience in blockchain domain
- Understanding of DeFi
- 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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