Senior Back Engineer

Senior Backend Developer - Web3 Infrastructure (TypeScript & Rust)

Location: Lausanne, Switzerland Work Setup: Hybrid (2 days remote/week)

Type: Permanent Start Date: Flexible Workload:%

Are you a backend engineer passionate about building performant, scalable systems and eager to explore cutting-edge technologies in the Web3 space? We're looking for a Senior Backend Developer to join a fast-growing DeFi project backed by a highly technical team and a strong crypto-native vision.

ðŸ" Your Mission

• Architect and implement high-reliability backend services (using TypeScript & Rust) that support core blockchain-enabled products.
• Build APIs, data pipelines, and internal tooling to streamline platform scalability and performance.
• Participate in the full development lifecycle from system design to testing, deployment, monitoring, and maintenance.
• Collaborate cross-functionally with engineering and product teams to ensure consistent, secure, and robust system behavior.
• Contribute to CI/CD pipelines and DevOps automation.
• Continuously improve code quality, performance benchmarks, and developer experience.

ðŸ ï Tech Environment

• Core Stack: TypeScript (-based microservices), Rust (growing footprint)
• Web3 / Smart Contracts: Solidity (EVM), Hardhat, multi-chain deployments (ETH, BSC, Arbitrum, etc.)
• API / Data: GraphQL, Apollo, NoSQL, Redis
• Infra & DevOps: AWS, Docker/Kubernetes, Terraform, GitHub Actions, CI/CD, monitoring with Prometheus & Grafana
• Frontend: React, TailwindCSS
• Culture: Clean code, code reviews, test coverage, end-to-end ownership, pragmatic use of new tech

✠What You Bring

• Must-have: Strong experience in backend engineering with TypeScript in production environments.
• Solid understanding of system architecture, microservices, and containerized infrastructure.
• Interest in Rust and motivation to upskill in a Web3/Rust-native ecosystem.
• Familiarity with modern DevOps tools and CI/CD practices.
• Excellent communication skills in both English and French.
• Proven ability to thrive in fast-paced, iterative environments with a high degree of autonomy.

🌠Bonus Points

• Prior exposure to DeFi or blockchain technologies.
• Experience with protocol integrations or backend systems interacting with smart contracts.
• Understanding of high-availability systems and performance optimization.

🚀 Why Join

• Work on impactful Web3 infrastructure projects with real-world traction.
• Join a lean, collaborative team with deep technical experience and crypto-native culture.
• Enjoy flexible work hours, 2 remote days per week, and an agile work environment.
• Competitive compensation and benefits aligned with your seniority.

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