Overview

1inch is the DeFi ecosystem building financial freedom for everyone. 1inch products help users and builders trade, hold and track digital assets with self-custody, security and an intuitive user experience. 1inch protocols and APIs provide core infrastructure across the DeFi industry and beyond. We are looking for a Senior Blockchain Engineer to join our team and help us deliver innovative and secure DeFi solutions.

Location: We hire with a focus on Dubai and Europe. For this role, we prefer candidates who are either based in Dubai or working remotely within +/- 4 hours GST time. This position requires a Get Stuff Done mentality and a passion for innovation.

Responsibilities

• Designing and optimising blockchain product architecture with a focus on scalability, security, and performance
• Leading the development, auditing, and integration of smart contracts within decentralised protocols
• Conducting technical research and PoC experiments, while implementing best practices in blockchain development
• Developing and improving cross-chain interoperability solutions, such as cross-chain swaps and bridges
• Designing and developing efficient algorithms, with a focus on gas optimisation
• Defining and implementing effective CI/CD processes for blockchain development
• Analysing and addressing potential attack vectors and ensuring security best practices
• Continuously monitoring emerging blockchain, Web3, and crypto technologies
• Performing rigorous code reviews, mentoring developers, and enforcing best practices in blockchain engineering
• Collaborating with auditors and cross-functional teams to ensure successful product launches

Requirements

• 7+ years of software development experience, with at least 3+ years in blockchain engineering
• Deep understanding of blockchain ecosystems, smart contracts (Solidity, Yul, EVM), and decentralized applications (dApps)
• Hands-on experience with Ethereum, Layer 2 solutions (Optimistic & ZK Rollups), and cross-chain protocols (atomic swaps, bridges, etc.)
• Proven track record in technical leadership, architectural decision-making, and mentoring development teams
• Strong background in blockchain security and experience with smart contract audits

Skills

• Proficiency in Solidity, Yul, Rust, TypeScript
• Experience with smart contract development and deployment frameworks (Foundry, Hardhat)
• Understanding of DeFi protocols, AMMs, liquidity pools, and oracle integrations
• Expertise in blockchain security principles and smart contract auditing methodologies
• Experience in building high-performance distributed systems

Why you'll love working with us

• Join a young, creative team in a fast-paced and supportive environment
• We’re open to new ideas — if you’ve got a vision, pitch it and make it happen
• Enjoy competitive pay that matches your skills and experience
• Be part of a company that’s shaping the future of DeFi
• Take time when you need it — we offer unlimited vacation days
• Get fully compensated for your work gear — we’ll set you up for success
• Travel with us! We host an annual team retreat at a top international location