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Blockchain Engineer

The roleWe 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 doDesign and implement smart contractsIntegrate on-chain systems with backend and frontend servicesWrite tests, deployment scripts, and upgrade pathsReview contract security and operational risksSupport indexing, events, and transaction monitoringCollaborate on token, custody, and market flowsWhat we're looking forMust-have experience and skills for this role.3+ years of software engineering experienceStrong Solidity or equivalent smart contract experienceUnderstanding of EVM fundamentals and common patternsExperience with Hardhat / Foundry (or similar)Ability to reason about security and edge casesComfort collaborating with backend and product teamsNice to haveAudit experience or formal verification exposureL2 networks (Polygon, Arbitrum, Optimism)ethers.js / web3.js integrationsRWA, DeFi, or fintech product experienceTech stackSolidityHardhat / FoundryEthereum · L2sethers.jsNode.jsPostgreSQLWhy joinWork on modern Web3, RWA, and digital productsHigh ownership and visible product impactClose collaboration with engineering, product, and designFast-paced environment with real production systemsRemote-friendly across global time zonesHiring processApplication reviewTechnical interviewFinal discussionHow to applyWe review every relevant profile. Keep it concise and concrete.Resume or LinkedInGitHub profile or portfolio (preferred)Examples of relevant work you're proud ofApply with the button on this page.Find more English Speaking Jobs in Switzerland on Arbeitnow

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Backend Engineer

The roleWe 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 doBuild and maintain backend services in one or more of: Node.js, Rust, Go, Java, Python, RubyDesign REST and/or GraphQL APIsModel data and own PostgreSQL / Redis (or equivalent) usageIntegrate blockchain APIs, wallets, and external servicesImplement auth, permissions, and operational controlsWrite tests, improve observability, and participate in reviewsShip production-ready services with CI/CDWhat we're looking forMust-have experience and skills for this role.3+ years of backend engineering experienceStrong proficiency in at least one of: Node.js/TypeScript, Rust, Go, Java, Python, or RubyExperience with relational databases (PostgreSQL preferred) and cachingSolid understanding of REST APIs and system design basicsExperience integrating external APIs or microservicesStrong coding fundamentals and production debugging skillsNice to haveProficiency across multiple backend languagesWeb3 integrations (ethers.js, smart contract APIs, chain clients)Event-driven or distributed systems experienceAWS / GCP familiarityFintech or consulting experienceTech stackNode.js · TypeScriptRustGoJavaPythonRubyPostgreSQL · RedisDocker · AWS / GCPWhy joinWork on modern Web3, RWA, and digital productsHigh ownership and visible product impactClose collaboration with engineering, product, and designFast-paced environment with real production systemsRemote-friendly across global time zonesWhat success looks likeStable APIs in productionClear data models and service boundariesReliable integrations with blockchain and third-party systemsLow operational noise and strong code qualityHiring processApplication reviewTechnical discussion (backend + system design)Final discussionFind more English Speaking Jobs in Switzerland on Arbeitnow

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