About Fhenix

Fhenix is pioneering the future of privacy in Web3 by bringing Fully Homomorphic Encryption (FHE) to the EVM.

Our mission is to make encrypted computation feel native and accessible — no cryptography PhD required. Backed by over $20M in funding, we're building the infrastructure and applications that unlock powerful, real-world use cases for encrypted smart contracts. As a fast-moving team of builders, researchers, and dreamers, we’re shaping a more private, secure blockchain ecosystem — starting with CoFHE, our off-chain co-processor that enables smart contracts to compute on encrypted data by simply importing our library. and we’re just getting started...

Job Responsibilities

• Innovate & Collaborate – Work closely with the team to brainstorm and design cutting-edge Web3 applications.
• Own the Build – Lead the full development lifecycle of dApps and platforms, from concept to deployment.
• Smart Contract Development – Write, test, and deploy secure and efficient smart contracts using Solidity.
• UI Implementation – Translate prototypes into elegant, user-friendly frontends with seamless user experiences.
• Responsive Design – Ensure designs are mobile-friendly and consistent across browsers and devices.
• Testing & QA – Develop robust test suites to maintain high code quality and application reliability.

Qualifications

• 3+ years of experience as a Web3 Full Stack Developer or in a similar role
• Strong proficiency in front-end technologies: HTML, CSS, JavaScript/TypeScript, and frameworks like React, Angular, or Vue
• Hands-on experience with smart contracts and tooling (Solidity, Hardhat, Foundry, wagmi, viem, ethers.js)
• Solid understanding of backend technologies (Node.js, Express.js, Python, etc.)
• Familiarity with databases: SQL, NoSQL, MongoDB, PostgreSQL, or similar
• Strong collaboration and communication skills
• Comfortable working in a fast-paced, startup environment
• Proven ability to lead end-to-end development of apps or platforms

Bonus points

• Experience with mobile development (React Native or native iOS/Android)
• Familiarity with cloud environments (AWS, GCP, Azure)
• Contributions to open-source projects or personal dev projects
• Understanding of cryptographic concepts (hashing, encryption)
• Experience with privacy focused technologies