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. So if you're someone who thinks big, moves fast and wants to make an impact right from day one, then get ready to join our industry-changing team.

Your mission

This is not an active vacancy. Instead, we're building a network of exceptional Blockchain Engineers (Smart Contracts) who have successfully completed our interview process and are ready to join 1inch when new positions become available.

Our engineering needs evolve rapidly, and we're always looking to connect with exceptional smart contract developers who want to help shape the future of DeFi. We look for engineers with a high-agency, Get Stuff Done mindset and an unrelenting passion for decentralised innovation.

We also embrace AI as a force multiplier for engineering, and value developers who thoughtfully leverage AI-powered tools to accelerate development, improve code quality, and solve complex technical challenges.

Successful candidates who pass the interview process will join our Pre-Qualified Talent Network. This means that when a suitable position becomes available, you'll be among the first people we consider, allowing us to move quickly through the final hiring stages and, where appropriate, straight to an offer.

What You'll Do

Contribute to the design and optimisation of scalable, secure, and high-performance blockchain architectures
Develop, integrate, test, and maintain smart contracts and decentralised protocol components
Conduct technical research and support proof-of-concept initiatives for new blockchain and DeFi features
Contribute to cross-chain interoperability solutions, including bridging and atomic swap mechanisms
Improve execution efficiency and optimise smart contract logic for gas consumption and performance
Collaborate with engineering and security teams to identify vulnerabilities and strengthen protocol reliability
Participate in code reviews, testing, CI/CD workflows, and engineering best practices
Work closely with cross-functional teams to support successful product delivery and continuous improvement

Who You Are

Professional experience building and operating backend systems in production environments
Strong proficiency in Golang, Typescript or another backend/systems programming language with practical concurrency and performance knowledge
Solid understanding of system design fundamentals including services, data flows, reliability, and maintainability
Familiarity with blockchain platforms, smart contracts, transaction handling, and on-chain integrations
Experience working with containerised services and modern deployment practices
Strong problem-solving skills and ability to work effectively in fast-paced engineering environments
Ability to balance technical quality, scalability, and operational reliability
At senior level, experience owning projects end-to-end and contributing to architectural decision-making

Nice to haves

Experience contributing to open-source blockchain or Web3 projects
Familiarity with zero-knowledge technologies or rollup architectures
Experience building distributed systems or low-latency infrastructure
Understanding of blockchain infrastructure automation and deployment tooling
Experience working in high-growth startup or scale-up 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.

We use AI-assisted tools to help us review applications efficiently. These tools support our recruitment team but do not make decisions on our behalf — every application is reviewed by a person before any outcome is determined. No offer or rejection is made solely on the basis of automated processing. For full details on how we use these tools and your rights in relation to them, please see our Applicant and Candidate Privacy Notice.

Talent Pool - Software Engineer, Blockchain (Smart Contracts)