What you'll do

• Build, extend, and operate backend services and APIs that power 1inch products and internal platforms
• Improve scalability, reliability, maintainability, and developer experience across backend systems
• Design and implement integrations with smart-contract platforms, blockchain data sources, and external services
• Contribute to observability, monitoring, incident response, and post-mortem processes
• Optimise backend services for performance, resilience, and operational efficiency
• Collaborate closely with product, blockchain, and infrastructure teams to deliver reliable distributed systems
• Participate in code reviews, testing workflows, and engineering best practices across the development lifecycle
• At senior level, own services end-to-end, define technical direction, and mentor other engineers

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 working with multiple blockchain networks or non-EVM ecosystems
• Familiarity with on-chain data indexing, observability tooling, or protocol debugging systems
• Experience building performance-sensitive systems such as routing engines, risk controls, or high-throughput pipelines
• Experience working within fintech, crypto, or other correctness-critical domains
• Exposure to distributed systems or low-latency infrastructure architectures

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.