{"id":2221152,"url":"https://alion.io/job/iesf-group-senior-web3-back-end-developer-fully-remote","title":"Senior Web3 Back-End Developer - fully remote","company":{"id":679069,"name":"IESF Group","domain":"iesf.ch","url":"https://alion.io/company/iesf","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Join","truth_index":null},"role":"Web3","role_family":"Web3","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":147000,"max_usd":243000,"period":"year","method":"role_seniority_country_cell","sample_n":9},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Smart Contracts","optional":false},{"name":"Tenderly","optional":false},{"name":"DeFi","optional":true},{"name":"Ethereum","optional":true},{"name":"JavaScript","optional":true},{"name":"Node JS","optional":true},{"name":"Solidity","optional":true}],"status":"live","first_seen_at":"2025-11-21T00:40:17Z","employer_posted_date":"2025-11-21","last_verified_at":"2026-10-12T03:39:58Z","board_verified":true,"closed_at":null,"days_open":325,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":325},"description":"Our client is an US based company, operating within the crypto economy and is supported by top tier funds. The company is focussed to connect capital to the most attractive risk adjusted yield across chains.\nThe company is growing its valued engineering team and we are looking for a skilled Senior Web3 Back End Engineer (fully remote role).\nTasks\nWe are seeking for a seasoned backend engineer with sharp web3 expertise.\nYou will help design and scale the infrastructure that powers a multichain yield platform.\nIf you enjoy building real systems rather than prototypes, you could be an excellent match.\nCore Tasks\nTake ownership of core backend systems for a multichain yield engine\n\nShape how on chain yield products evolve in the coming years\n\nJoin early and influence product, architecture and culture\n\nRequirements\nYour Profile:\n3 or more years of experience building and launching production web3 backend systems\nStrong experience integrating with protocols and smart contracts, including complex transaction flows and RPC interactions\nSolid understanding of EVM internals, smart contract design patterns and industry best practices\nComfortable with tools such as Tenderly, ethers, viem and wagmi\nAble to push through technical challenges with creativity and persistence\nComfortable working independently in an environment with a shifting context\nCare deeply about building things that users trust\nCare about a secure, fault-tolerant, and maintainable infrastructure\nNice to Have\nExperience deploying smart contracts to mainnet and EVM-compatible networks\nSolidity DeFi protocols development\nJavaScript BE with NodeJS\nBenefits\nFast growing company with excellent work environment.\nFlexibility and great salary range!","description_format":"text","description_chars":1724,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies","Recruiting & Staffing","Management Consulting"],"lifecycle":[{"event":"open","at":"2026-10-10T13:57:22Z"}],"visa":[],"liveness":{"score":52,"band":"ok","label":"Likely open","p_open":1,"p_active":0.86,"p_room":0.6,"age_days":325,"expected_fill_days":389,"reasons":["conf:3","win:late","crowd:"],"computed_at":"2026-10-12T06:55:09Z"},"pay":null,"html_url":"https://alion.io/job/iesf-group-senior-web3-back-end-developer-fully-remote","json_url":"https://alion.io/job/iesf-group-senior-web3-back-end-developer-fully-remote.json","meta":{"generated_at":"2026-10-12T12:25:34Z","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":19397,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"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":679069},"rest":"https://alion.io/mcp/rest/get_company?id=679069"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fiesf-group-senior-web3-back-end-developer-fully-remote"},{"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%2Fiesf-group-senior-web3-back-end-developer-fully-remote"},{"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%2Fiesf-group-senior-web3-back-end-developer-fully-remote"},{"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/iesf-group-senior-web3-back-end-developer-fully-remote\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fiesf-group-senior-web3-back-end-developer-fully-remote"}]}