B2B Sales Manager:in – DACH-Markt (Homeoffice, 50 %) – Freelance

The role We are hiring a Backend Engineer to design, build, and maintain scalable backend services. You will own APIs, data models, and integrations with blockchain and third-party systems. Stack is not limited to Node — strong engineers in Rust, Go, Java, Python, or Ruby are welcome. This is a hands-on role focused on reliability, security, and production readiness. What you'll do Build and maintain backend services in one or more of: Node.js, Rust, Go, Java, Python, Ruby Design REST and/or GraphQL APIs Model data and own PostgreSQL / Redis (or equivalent) usage Integrate blockchain APIs, wallets, and external services Implement auth, permissions, and operational controls Write tests, improve observability, and participate in reviews Ship production-ready services with CI/CD What we're looking for Must-have experience and skills for this role. 3+ years of backend engineering experience Strong proficiency in at least one of: Node.js/TypeScript, Rust, Go, Java, Python, or Ruby Experience with relational databases (PostgreSQL preferred) and caching Solid understanding of REST APIs and system design basics Experience integrating external APIs or microservices Strong coding fundamentals and production debugging skills Nice to have Proficiency across multiple backend languages Web3 integrations (ethers.js, smart contract APIs, chain clients) Event-driven or distributed systems experience AWS / GCP familiarity Fintech or consulting experience Tech stack Node.js · TypeScript Rust Go Java Python Ruby PostgreSQL · Redis Docker · AWS / GCP Why join Work on modern Web3, RWA, and digital products High ownership and visible product impact Close collaboration with engineering, product, and design Fast-paced environment with real production systems Remote-friendly across global time zones What success looks like Stable APIs in production Clear data models and service boundaries Reliable integrations with blockchain and third-party systems Low operational noise and strong code qua…

Publié 23 Oct 2026

The role We are hiring a Blockchain Engineer to design and implement smart contracts and chain integrations. You will work closely with backend and product teams to ship secure, production-ready on-chain systems. This is a hands-on role focused on correctness, gas efficiency, and operational safety. What you'll do Design and implement smart contracts Integrate on-chain systems with backend and frontend services Write tests, deployment scripts, and upgrade paths Review contract security and operational risks Support indexing, events, and transaction monitoring Collaborate on token, custody, and market flows What we're looking for Must-have experience and skills for this role. 3+ years of software engineering experience Strong Solidity or equivalent smart contract experience Understanding of EVM fundamentals and common patterns Experience with Hardhat / Foundry (or similar) Ability to reason about security and edge cases Comfort collaborating with backend and product teams Nice to have Audit experience or formal verification exposure L2 networks (Polygon, Arbitrum, Optimism) ethers.js / web3.js integrations RWA, DeFi, or fintech product experience Tech stack Solidity Hardhat / Foundry Ethereum · L2s ethers.js Node.js PostgreSQL Why join Work on modern Web3, RWA, and digital products High ownership and visible product impact Close collaboration with engineering, product, and design Fast-paced environment with real production systems Remote-friendly across global time zones Hiring process Application review Technical interview Final discussion How to apply We review every relevant profile. Keep it concise and concrete. Resume or LinkedIn GitHub profile or portfolio (preferred) Examples of relevant work you're proud of Apply with the button on this page. Find Jobs in Switzerland on Arbeitnow

Publié 23 Oct 2026