{"id":3256104,"url":"https://alion.io/job/0x-senior-software-engineer-api-products","title":"Senior Software Engineer (API Products)","company":{"id":47499,"name":"0x","domain":"0x.org","url":"https://alion.io/company/0x-org","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"role":"Backend","role_family":"Backend","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":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":150000,"max":230000,"currency":"USD","period":"year","gross":null,"usd_annual":230000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"DeFi","optional":false},{"name":"Rust","optional":false},{"name":"Solana","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-10-26T00:02:51Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-27T14:38:12Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Join our API Products team as a Senior Software Engineer. You'll lead projects from conception to production, build new APIs and trading products, maintain and extend existing APIs, and ensure their speed and reliability. This is a hands-on role for someone who thrives with autonomy and wants to make a real impact. Enjoy benefits like unlimited time off, a fully paid health plan, and a monthly wellness allowance.\nMissions\nLead projects from initial concept to production, focusing on new products and existing APIs.\nBuild new APIs and trading products, from researching the problem and designing the architecture to shipping the first version.\nMaintain and extend existing APIs, ensuring they remain fast and reliable as traffic grows.\nProfil recherché\n - Built and maintained developer-facing APIs- You’re an AI power user who uses it to multiply your impact as an engineer, yet you don’t let it replace your judgment\n- Senior or Lead Engineer with a track record of owning complex projects end to end\n- Deep onchain knowledge, especially EVM: how transactions work, including calldata, contract interfaces, gas and approvals\n- Clear communicator, comfortable explaining technical tradeoffs to non-engineers\n- Able to attend annual in-person team offsites around the globe\n- 7+ years of backend engineering experience, including at least 2 years in DeFi at a trading app, wallet, DEX aggregator, onchain data company or similar\n- Aligned with our core values: do the right thing, consistently ship, and focus on long-term impact\n- Strong system design experience for production-scale backend services\n- Experience with cross-chain/bridging, or DEX aggregation\n- Experience with other ecosystems outside of EVM such as Solana\n- Experience with TypeScript and/or Rust, our main languages","description_format":"text","description_chars":1790,"description_truncated":false,"requirements":{"experience_years_min":7,"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","DeFi"],"lifecycle":[{"event":"open","at":"2026-10-26T01:59:41Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":7,"reasons":["conf:0","win:early"],"computed_at":"2026-10-27T05:46:45Z"},"pay":{"stated_usd_annual":230000,"is_top_pay":true},"html_url":"https://alion.io/job/0x-senior-software-engineer-api-products","json_url":"https://alion.io/job/0x-senior-software-engineer-api-products.json","meta":{"generated_at":"2026-10-27T16:49:21Z","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":6288,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"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":47499},"rest":"https://alion.io/mcp/rest/get_company?id=47499"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2F0x-senior-software-engineer-api-products"},{"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%2F0x-senior-software-engineer-api-products"},{"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%2F0x-senior-software-engineer-api-products"},{"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/0x-senior-software-engineer-api-products\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2F0x-senior-software-engineer-api-products"}]}