The Software Engineer will design, develop, and maintain frontend applications using Angular, improving performance and collaborating with teams. Senior candidates will lead architectural initiatives and mentor others.
1inch is the DeFi ecosystem building financial freedom for everyone. 1inch products help users and builders trade, hold and track digital assets - with the self-custody, comprehensive security and the intuitive user experience they need to unlock the potential of true crypto ownership. 1inch protocols and APIs provide core infrastructure across the DeFi industry and beyond.
Your mission
1inch builds some of the most-used interfaces in DeFi — from our flagship swap aggregator to advanced trading tools, portfolio views and developer-facing pages. Our frontend engineers own these experiences end-to-end, ensuring they are fast, reliable and intuitive for millions of users across multiple chains.
We are building a talent pool of frontend engineers at mid and senior level. This is an evergreen posting: there is no single open role tied to it, but when approved positions arise you will already be in our pipeline.
What you'll do
- Design, develop, and maintain frontend applications and shared UI components using Angular, RxJS, and TypeScript
- Build responsive, scalable, and high-performance web applications with strong usability and security standards
- Contribute to frontend architecture decisions, testing strategies, CI/CD workflows, and development standards
- Improve frontend reliability, maintainability, accessibility, and browser performance optimisation
- Collaborate closely with product, design, backend, and blockchain engineering teams to deliver seamless user experiences
- Participate in code reviews, testing workflows, and continuous improvement of frontend engineering practices
- Monitor frontend application performance and contribute to observability and debugging processes
- At senior level, lead architectural initiatives, mentor engineers, and drive frontend engineering standards across teams
Who you are
- Strong proficiency with Angular, RxJS, and TypeScript
- Solid understanding of modern web technologies including DOM, SCSS/CSS, HTTP, CORS, and CSP
- Experience working with frontend monitoring, testing, and CI/CD tooling such as Sentry and GitHub Actions
- Familiarity with Service Workers and browser performance optimisation techniques
- Experience writing unit and integration tests for frontend applications
- Strong communication skills and ability to work effectively within distributed engineering teams
- Professional frontend engineering experience building scalable web applications in production environments
- For senior-level candidates, experience designing frontend architectures, reusable component systems, and leading technical initiatives
Nice to haves
- Experience working with Ethereum, JSON-RPC, Solidity, smart contracts, or Web3 technologies
- Familiarity with Ethers.js, EIP-2612, and Automated Market Maker (AMM) protocols
- Experience building decentralised applications and blockchain-based user interfaces
- Backend exposure with technologies such as NestJS, Docker, or microservices
- Experience working in fast-paced startup, scale-up, or high-growth technology environments
1inch is an equal opportunity employer. We are committed to evaluating all candidates on the basis of their skills, experience, and potential — regardless of race, ethnicity, nationality, gender, age, religion, disability, or any other characteristic. We believe diverse teams build better products, and we welcome applications from all backgrounds.
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If asked to name the birthplace of the RMS Titanic, you might not say Belfast. Similarly, if asked to name Europe's leading destination for foreign direct investment in new software development, Belfast might not come to mind. Yet, both are true. The city has emerged as a tech powerhouse, recently ranked among the best in the U.K. for tech careers — especially for software developers. It also leads the U.K. with the highest percentage of software development jobs advertised.
