{"id":3403392,"url":"https://alion.io/job/link-group-blockchain-developer","title":"Blockchain Developer","company":{"id":880,"name":"Link Group","domain":"linkgroup.co","url":"https://alion.io/company/link-group","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitify","truth_index":{"grade":"B","score":83,"open_postings":94,"ghost_share":0,"stale_share":0.67,"repost_share":0,"time_to_fill_p50_days":46,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Web3","role_family":"Web3","seniority":null,"employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":27000,"max":32000,"currency":"PLN","period":"month","gross":null,"usd_annual":97284},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Go","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false},{"name":"Smart Contracts","optional":false},{"name":"TypeScript","optional":false},{"name":"DeFi","optional":true},{"name":"Ethereum","optional":true},{"name":"Ethers.js","optional":true},{"name":"Foundry","optional":true},{"name":"Hardhat","optional":true},{"name":"Layer 2","optional":true},{"name":"Solidity","optional":true}],"status":"live","first_seen_at":"2026-10-28T14:36:05Z","employer_posted_date":"2026-10-28","last_verified_at":"2026-10-31T15:38:35Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Blockchain Developer\nRole Overview\nWe are looking for a Blockchain Developer to design, develop, and maintain blockchain-based applications and decentralized solutions. The ideal candidate has strong software engineering skills, experience with smart contracts, and an understanding of blockchain architecture and security principles.\nResponsibilities\nDesign, develop, test, and deploy blockchain applications and smart contracts.\nBuild and maintain decentralized applications (dApps) and blockchain integrations.\nWork with blockchain protocols, distributed systems, and cryptographic mechanisms.\nDevelop and integrate APIs connecting blockchain solutions with external systems.\nOptimize smart contract performance, scalability, and transaction costs.\nConduct code reviews, testing, and security assessments to ensure code quality.\nCollaborate with product managers, architects, and other developers to deliver reliable solutions.\nStay up to date with emerging blockchain technologies and industry best practices.\nRequirements\nProfessional experience in software development, preferably in blockchain projects.\nKnowledge of blockchain architecture, distributed ledgers, and consensus mechanisms.\nHands-on experience developing and deploying smart contracts.\nProficiency in at least one relevant programming language, such as Rust, Python, Go, or JavaScript/TypeScript.\nExperience with blockchain development frameworks, APIs, and testing tools.\nUnderstanding of cryptography, wallet integrations, and blockchain security.\nFamiliarity with Git, automated testing, and CI/CD practices.\nGood problem-solving skills and the ability to work independently and collaboratively.\nNice to Have\nExperience with Ethereum, EVM-compatible networks, or other blockchain platforms.\nKnowledge of Web3 libraries and tools, such as ethers.js, Hardhat, or Foundry.\nExperience with DeFi, tokenization, NFTs, or other blockchain use cases.\nFamiliarity with Layer 2 solutions, cross-chain integrations, and scalability mechanisms.\nExperience with cloud infrastructure and containerization technologies.\nUnderstanding of smart contract auditing and security 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