{"id":492600,"url":"https://alion.io/job/datachain-backend-engineer-contract-position","title":"Backend Engineer (Contract Position)","company":{"id":99268,"name":"Datachain","domain":"datachain.jp","url":"https://alion.io/company/datachain","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"HERP","truth_index":{"grade":"A","score":95,"open_postings":9,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":147,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"inferred_company_offices","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["JP"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":90000,"max_usd":231000,"period":"year","method":"global_role_seniority_cell","sample_n":7270},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Go","optional":false},{"name":"Rust","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false}],"status":"live","first_seen_at":"2026-09-07T01:36:13Z","employer_posted_date":null,"last_verified_at":"2026-09-07T01:36:13Z","board_verified":false,"closed_at":null,"days_open":48,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":48},"description":"Description\nJob Overview\n1. The Blockchain Market and Our Challenge\nSince our early days, we have focused heavily on R&D in blockchain infrastructure. Through these efforts, we have successfully developed technology that enables secure, cost-efficient, and scalable interoperability between different blockchains.\nThis technology is highly innovative on a global scale and has received strong recognition, including from SWIFT (Society for Worldwide Interbank Financial Telecommunication).\nLeveraging this technology and our deep expertise in blockchain, we are advancing businesses related to blockchain-based finance and digital currencies, including stablecoins and tokenized deposits.\n2. Products You Will Work On\nYou will lead the planning, development, and growth of products that are expected to become critical infrastructure for on-chain finance, including our recently announced enterprise Web3 wallet and Data Privacy solutions.\n3. Mission\n“To bring cutting-edge blockchain technology into real-world use and create the next generation of trust infrastructure.”\nAs a Blockchain Engineer supporting the core of our Web3 products, you will tackle advanced technical challenges such as data privacy protection and the implementation of sophisticated policy engines.\nYou will be expected to define platform specifications by working backward from business needs and serve as a specialist in smart contract implementation, providing the technical foundation that supports our products at their core.\n4. Key Responsibilities\nDesign and implement privacy-preserving technologies, including Zero-Knowledge Proofs and Confidential Transactions\nDesign, implement, and support audits of smart contracts\nConduct in-depth implementation work at the protocol level for EVM-compatible blockchains\nImplement backend systems for policy engines and access control\nCollaborate technically with external blockchain partners\n5. About Datachain\nSince its founding in 2018, Datachain has continued to invest in R&D as a Japan-born global deep-tech company, with the goal of creating infrastructure that becomes the de facto industry standard.\nAs we prepare for a future in which real-world assets (RWAs) such as equities, bonds, and real estate are increasingly represented as digital assets, we are accelerating the development of next-generation financial infrastructure.\nWe are hiring for this position to strengthen the backend engineering capabilities that will play a central role in building this infrastructure.\nRequired Qualifications\n5+ years of professional experience as a backend engineer\nHands-on professional experience in blockchain and smart contract development, including experience with EVM-compatible blockchains\nExperience implementing on-chain and off-chain systems using at least one of the following languages: Solidity, Go, or Rust\nPreferred Qualifications\nPractical knowledge of cryptographic technologies, such as elliptic curve cryptography, Zero-Knowledge Proofs, or MPC\nExperience designing and implementing smart contract wallets\nExperience operating and customizing blockchain nodes\nExperience with smart contract security audits and vulnerability remediation\nIdeal Candidate Profile\nAble to define appropriate implementation standards for software intended for long-term use, such as OSS, and translate those standards into high-quality implementations\nStrong understanding of low-level system concepts, including networking, security, data structures, and computational costs, with the ability to apply that knowledge in implementation\nStrong interest in technically challenging areas, with experience such as contributing to OSS projects","description_format":"text","description_chars":3661,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Japan","iso":"JP","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies","Stablecoins"],"lifecycle":[{"event":"open","at":"2026-09-07T02:09:43Z"}],"visa":[],"liveness":{"score":31,"band":"fade","label":"Fading","p_open":0.4,"p_active":0.787,"p_room":1,"age_days":48,"expected_fill_days":147,"reasons":["seen:48","win:early"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/datachain-backend-engineer-contract-position","json_url":"https://alion.io/job/datachain-backend-engineer-contract-position.json","meta":{"generated_at":"2026-10-26T01:04:26Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":1384,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":99268},"rest":"https://alion.io/mcp/rest/get_company?id=99268"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdatachain-backend-engineer-contract-position"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fdatachain-backend-engineer-contract-position"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fdatachain-backend-engineer-contract-position"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/datachain-backend-engineer-contract-position\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdatachain-backend-engineer-contract-position"}]}