Senior Software Engineer, Blockchain (Smart Contracts)
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Key skills for this role
About the Role
1inch is seeking a Senior Software Engineer to design and optimize smart contracts and blockchain infrastructure for DeFi products. The role requires deep expertise in Ethereum, Solidity, and production smart contract deployment.
Key Skills for This Role
Responsibilities
- Design and optimise blockchain architectures with a 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
Requirements
- 7+ years of professional software engineering experience
- 3+ years focused on blockchain development
- Deep expertise in Ethereum and EVM ecosystems, including Solidity and Yul
- Strong experience building and deploying smart contracts in production
- Hands on experience with Layer 2 scaling solutions and cross chain infrastructure
- Proven ability to drive architectural decisions and lead complex technical initiatives
- Strong understanding of smart contract security principles and auditing processes
- Experience working in fast paced, high growth engineering environments
Full Job Posting
About 1inch
- 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 and security.
- 1inch protocols and APIs provide core infrastructure across the DeFi industry.
Your Mission
- We are seeking exceptional smart contract engineers to join our mission.
- We look for engineers with a high agency, 'Get Stuff Done' mindset and passion for decentralised innovation.
- We embrace AI as a force multiplier for engineering.
What You’ll Do
- Design and optimise blockchain architectures with a 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.
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