{"id":8517,"url":"https://alion.io/job/polymarket-senior-web-engineer","title":"Senior Web Engineer","company":{"id":604,"name":"Polymarket","domain":"polymarket.com","url":"https://alion.io/company/polymarket","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"C","score":58,"open_postings":3,"ghost_share":0.333,"stale_share":0.667,"repost_share":0.333,"time_to_fill_p50_days":52,"computed_at":"2026-10-29T05:49:05Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":230000,"max":330000,"currency":"USD","period":"year","gross":null,"usd_annual":330000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Next.js","optional":false},{"name":"React.js","optional":false},{"name":"State Management","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-04-29T05:58:15Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-29T17:26:11Z","board_verified":true,"closed_at":null,"days_open":183,"trust":{"level":"ghost","repost_count":2,"flags":["stale","repost"],"days_open":182},"description":"About Polymarket\nPolymarket is the world's largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centralized \"house,\" Polymarket aggregates diverse opinions into transparent, market-based probabilities that reflect collective expectations about the future.\nWe're growing fast - both in terms of volume ($21B traded in 2025) and adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media and we need your help adding fuel to the fire.\nAbout the Role\nPolymarket is looking for a Senior Web Engineer to own complex frontend features, improve reliability, and help us ship faster with confidence. You'll own major web surfaces end-to-end: from scoping and implementation through launch, monitoring, and production support. This is a high-ownership role at the intersection of frontend product development, backend systems, performance, and reliability. You should have experience in crypto and be comfortable shipping complicated React/Next.js features, debugging ambiguous production issues, and working across teams without needing hand-holding. We want someone who can move fast, make strong technical decisions, and help raise the quality bar for our frontend systems.\nWhat You'll Do\nOwn and ship complex features end-to-end. Build and launch web features across Polymarket's core product surfaces, making thoughtful tradeoffs between speed, quality, architecture, and long-term maintainability.\n\nCollaborate across the stack. Work closely with backend engineers to design APIs, reason through data flows, and build reliable user experiences on top of complex systems. Partner with QA, TPM, product, and design to clarify requirements, manage launches, and improve product quality.\n\nOwn reliability and incident response for your domain. Monitor dashboards, alerts, and user reports to identify and respond to issues quickly. Work with backend and infrastructure teams during incidents to isolate root causes, ship mitigations, and follow through with fixes and prevention work.\n\nImprove frontend observability. Build and improve the logs, metrics, alerts, dashboards, and error reporting that give the team visibility into how our frontend systems are performing.\n\nRaise the engineering bar. Identify meaningful technical debt, propose pragmatic refactors, and contribute to system design discussions that evolve our frontend architecture as the product scales. Lead by example through strong code reviews, clear communication, and high-quality execution.\n\nTie technical work to outcomes. Connect your work to measurable results - performance, reliability, product quality, and conversion - and help break down ambiguous product requirements into shippable engineering work.\n\nWhat We're Looking For\n5+ years of frontend web engineering experience with experience in crypto, Web3, or adjacent financial infrastructure\n\nStrong hands-on experience with React, Next.js, TypeScript, and modern frontend development\n\nStrong frontend system design instincts across state management, data fetching, caching, performance, reliability, and maintainability\n\nExperience owning complex features from scoping through launch\n\nStrong debugging skills and experience responding to production issues\n\nComfortable working with backend engineers on APIs, data contracts, failure modes, and system behavior\n\nHigh agency: you notice problems, propose solutions, and drive work to completion\n\nProduct-minded: you care about user experience, not just implementation\n\nAble to operate independently in a fast-moving, ambiguous environment\n\nClear communicator during planning, launches, bugs, and incidents\n\n(Plus) Frontend performance specialization\n\n(Plus) Experience with high-traffic, real-time, marketplace, trading, or financial products\n\n(Plus) Experience building for WebViews or shared web/mobile surfaces\n\n(Plus) Experience improving frontend observability, alerting, or reliability practices\n\n(Plus) Strong practical use of AI tools to improve engineering productivity\n\nBenefits\nCompetitive salary & equity\n\nUnlimited PTO\n\nFull Health, Vision, & Dental coverage\n\n401k match\n\nHardware setup: new MacBook Pro, big display, & accessories\n\nPay Transparency\nBase salary range: $230,000 to $330,000 annually, plus equity and benefits.\nThis range reflects a good-faith estimate for this position. Experience levels vary widely within a title here, so please reach out even if your expectations fall outside it. We're always happy to chat.","description_format":"text","description_chars":4643,"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":["401k plan","Apple Macbook","Equity","Unlimited PTO"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Web3 & dApps","iGaming & Gambling"],"lifecycle":[{"event":"open","at":"2026-04-29T05:58:15Z"},{"event":"close","at":"2026-08-13T11:30:17Z"},{"event":"reopen","at":"2026-08-30T15:36:31Z"},{"event":"close","at":"2026-09-23T23:07:32Z"},{"event":"reopen","at":"2026-10-26T17:39:18Z"}],"visa":[],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.3,"p_room":0.28,"age_days":182,"expected_fill_days":52,"reasons":["conf:1","repost:2","velocity","ghost","win:tail","crowd:"],"computed_at":"2026-10-29T05:49:05Z"},"pay":{"stated_usd_annual":330000,"is_top_pay":true},"html_url":"https://alion.io/job/polymarket-senior-web-engineer","json_url":"https://alion.io/job/polymarket-senior-web-engineer.json","meta":{"generated_at":"2026-10-29T19:47:35Z","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":29356,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":604},"rest":"https://alion.io/mcp/rest/get_company?id=604"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fpolymarket-senior-web-engineer"},{"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%2Fpolymarket-senior-web-engineer"},{"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%2Fpolymarket-senior-web-engineer"},{"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/polymarket-senior-web-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fpolymarket-senior-web-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":8517}},{"tool":"search_jobs","arguments":{"company":"polymarket.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":8517},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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