Your mission
1inch is one of the most widely used DeFi platforms, powering swaps, limit orders and liquidity tools across multiple chains. Our backend systems sit between users and the blockchain — routing transactions, aggregating liquidity, serving APIs at scale, and ensuring every operation is correct in a high-stakes financial environment.
We are building a talent pool of backend engineers at mid and senior level who want to help shape this infrastructure. 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
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
