Senior Blockchain Engineer - De Fi / Smart Contracts Lausanne, Switzerland (Hybrid) | 80-100% | Permanent contract A fast-growing Swiss technology company is looking for an experienced Senior Blockchain Engineer to strengthen its De Fi product team.
In this role, you'll be at the heart of designing and building innovative decentralized finance solutions, working in a collaborative environment where new ideas are encouraged and quickly turned into Blockchain Developer - Web3 Scale-up Your Mission- Take ownership of the design, development, testing and deployment of smart contracts within a sophisticated De Fi ecosystem.- Translate business and product requirements into secure, scalable blockchain architectures.- Work hand-in-hand with fellow engineers, product owners and other stakeholders to deliver new blockchain functionalities.- Apply rigorous testing methodologies (unit, integration, fuzzing) to ensure robustness and security.- Help evolve the blockchain infrastructure, improve internal tools, and streamline development workflows.- Keep a close eye on emerging De Fi trends, L2 solutions and smart contract best practices to push innovation forward.
What You Bring- A deep interest in De Fi innovation and blockchain technologies, coupled with strong analytical and problem-solving skills.- The ability to thrive in a fast-moving environment, make informed decisions with partial information, and work autonomously while collaborating effectively.
Several years of hands-on blockchain development, including:- Advanced proficiency in Solidity and smart contract security.- Solid understanding of De Fi primitives, DEXs, and liquidity mechanisms.- Strong generalist software engineering background (multiple languages, testing, clean architecture).- Experience working in multidisciplinary engineering teams on complex, scalable codebases.
Leadership experience is a plus.- Excellent communication skills in English; proficiency in French is a strong asset.
Technical Environment of the company- Blockchain: EVM-compatible chains, Solidity, Foundry/Hardhat toolchains, extensive smart contract test coverage including fuzzing and property-based testing.- Frontend: Modern Type Script stack with React-based frameworks, tightly integrated with blockchain backends.- Backend & Infrastructure:, REST/Graph QL APIs, Dockerized services, CI/CD pipelines for rapid iteration and secure deployments.- Architecture: Modular on-chain/off-chain integration, data indexing, monitoring and analytics dashboards to ensure reliability and performance.- Culture: Developer-driven workflows, open discussions on architecture choices, strong emphasis on code quality, security, and peer review.
Why Join- Collaborate with a high-caliber team of blockchain specialists to build cutting-edge De Fi products.- Benefit from a competitive compensation package aligned with your expertise.- Enjoy a hybrid working model, with two remote days per week and flexible hours.- Contribute to impactful projects at the forefront of the De Fi ecosystem.
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