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Quick apply
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Senior Software Engineer, Blockchain (Smart Contracts)

1inch
Remote

Quick apply

Job details

Full-time

Qualifications

CI/CD
Performance tuning
Mentoring junior staff
CI/CD pipelines
Distributed systems
Mentoring
AI

Full job description

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

At 1inch, our engineering needs evolve rapidly. We are constantly seeking exceptional smart contract engineers to join our mission.

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

As part of our engineering ecosystem, you will contribute to designing, developing, and optimising the smart contracts and underlying infrastructure powering 1inch.

We value sophisticated problem-solvers who can navigate the lightning-fast shifts of the crypto landscape while executing securely at scale.

Working alongside our product leads and world-class engineers, your commitment to open-source excellence will keep 1inch at the absolute cutting edge of DeFi.

What you’ll do

Design and optimise blockchain architectures with a strong focus on scalability, security, and performance
Develop, integrate, and maintain smart contracts across decentralised protocols and infrastructure components
Conduct technical research and build proof-of-concepts for new DeFi and blockchain innovations
Design and improve cross-chain interoperability solutions, including bridging and atomic swap mechanisms
Optimise smart contract execution efficiency with a focus on gas consumption and low-latency performance
Collaborate with internal and external security auditors to identify vulnerabilities and strengthen protocol security
Lead code reviews and contribute to engineering best practices, CI/CD workflows, and development standards
Mentor junior and mid-level engineers while contributing to a collaborative engineering culture

Who you are

7+ years of professional software engineering experience, including 3+ years focused on blockchain development
Deep expertise in Ethereum and EVM ecosystems, including Solidity, Yul, and decentralised application architecture
Strong experience building and deploying smart contracts in production environments
Hands-on experience with Layer 2 scaling solutions and cross-chain infrastructure
Proven ability to drive architectural decisions and lead complex technical initiatives from design to deployment
Strong understanding of smart contract security principles, auditing processes, and vulnerability mitigation
Experience working in fast-paced, high-growth engineering environments
Strong problem-solving skills with a proactive, ownership-driven mindset

Nice to haves

Experience contributing to open-source blockchain or DeFi projects
Familiarity with zero-knowledge technologies and rollup architectures
Experience building high-performance distributed systems or low-latency infrastructure
Understanding of DeFi protocols, liquidity aggregation, or on-chain trading systems
Knowledge of Web3 developer tooling and blockchain infrastructure automation

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.

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