{"id":14863,"url":"https://alion.io/job/retell-ai-senior-software-engineer-full-stack","title":"Senior Software Engineer, Full Stack","company":{"id":4592,"name":"Retell AI","domain":"retellai.com","url":"https://alion.io/company/retell-ai","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":81,"open_postings":9,"ghost_share":0,"stale_share":0.778,"repost_share":0,"time_to_fill_p50_days":39,"computed_at":"2026-10-16T05:45:00Z"}},"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":"explicit","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":200000,"max":300000,"currency":"USD","period":"year","gross":null,"usd_annual":300000},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Node JS","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false},{"name":"Voice Agents","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2025-10-06T13:12:52Z","employer_posted_date":"2025-10-06","last_verified_at":"2026-10-16T17:46:36Z","board_verified":true,"closed_at":null,"days_open":375,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":374},"description":"ABOUT RETELL AI\nRetell AI is using first-principles thinking to reimagine the call center with cutting-edge voice AI. Thousands of companies now use Retell's AI voice agents to handle sales, support, and logistics calls that once required large teams of human agents. Backed by Y Combinator, Alt Capital, and other leading investors, we've scaled to $80M in ARR with a team of 50, up from $5M at the start of 2025, and are now valued at over $1.5B.\nOur vision for 2026 is to build a modern CX platform where entire contact centers are powered by AI. Instead of basic automation that needs constant human tuning, we're creating intelligent AI “workers” that act as frontline agents, QA analysts, and managers, continuously executing, monitoring, and improving every customer interaction.\nWe're growing fast and looking for ambitious builders who want to tackle hard technical problems, move quickly, and have a real impact on one of the fastest-growing voice AI companies in the world.\nLet's build the future together.\nRecent recognition:\nNo. 1 Best Places to Work in the Bay Area, San Francisco Business Times 2026\n\nTop 50 AI Apps, a16z (2025)\n\n#3 Fastest-Growing Software Company, G2 Best Software Awards 2026\n\nBest Agentic AI Software, G2 Best Software Awards 2026\n\n#4 Fastest-Growing Software Vendor, Brex Benchmark 2025\n\nEnterprise Tech 30 Class of 2026, Nasdaq & Wing VC\n\nTop-Ranked Startup, Lean AI Leaderboard\n\nBacked by Y Combinator\n\nABOUT THE ROLE\nRetell AI transforms customer experience with voice AI for enterprises, including customers like CVS/Aetna, American Airlines, Lenovo, and Grab. We have more customer stories than we can tell!\nAs a Senior Full-Stack Engineer, you’ll shape the heart of Retell AI’s voice automation platform, building scalable systems and intuitive interfaces that power millions of AI-driven conversations. You’ll work across the stack, leveraging React, TypeScript, and Node.js, to deliver fast, beautiful, and reliable solutions. Collaborating closely with the founding team, you’ll bridge backend architecture (like prompt orchestration and telephony integrations) with frontend experiences (such as dashboards and analytics tools), ensuring seamless customer onboarding and impactful user experiences. This high-impact role offers rapid feedback loops, customer collaboration, and the opportunity to define a category-leading product that transforms global communication.\nKEY RESPONSIBILITIES\nDevelop core features like prompt orchestration, dashboards, analytics, and telephony integrations.\n\nBuild scalable full-stack systems, from polished UIs to robust APIs and DevOps workflows.\n\nLead projects from architecture to production, owning coding, deployment, and iteration.\n\nCreate intuitive interfaces and APIs, enabling customers to activate in hours.\n\nSupport customer onboarding, debug issues, and turn feedback into product enhancements.\n\nYOU MIGHT THRIVE IF\nHave 2+ years of full-stack experience with React, TypeScript, Node.js, or Python.\n\nHold a degree in CS, CE, or equivalent practical experience.\n\nTake ownership like a founder, proactively solving problems across the stack.\n\nThrive in fast-paced settings, quickly adapting to new tools and challenges.\n\nCommunicate clearly, collaborating effectively in small, dynamic teams.\n\nJOB DETAILS\nCash: 200k - 300k\n\nEquity: Offers Meaningful Equity\n\nLocation: Redwood City, CA, US (100% Relocation Provided)\n\nUS Visas: Retell AI is open to sponsoring work authorization for qualified candidates, including H1B/H-1B, TN, L-1, E-3, F-1 (OPT/CPT), and O-1 visas.\n\nOTHER BENEFITS\n100% coverage for medical, dental, and vision insurance\n\n$70/day DoorDash credit for unlimited breakfast, lunch, dinner, and snacks\n\n$200/month wellness reimbursement (gym, fitness classes, etc.)\n\n$300/month commuter reimbursement (gas, Caltrain, etc.)\n\n$75/month phone bill reimbursement\n\n$50/month internet reimbursement\n\nCOMPENSATION PHILOSOPHY\nBest Offer Upfront: Choose from three cash-equity balance options; no negotiation needed.\n\nTop 1% Talent: Above-market pay (top 5 percentile) to attract exceptional builders.\n\nHigh Ownership: Small teams, >$1M revenue/employee, and significant equity.\n\nPerformance-Based: Offers tied to interview performance, not experience or past salaries.\n\nINTERVIEW PROCESS\nIntro Call (15-20min): Connect with our Founding Recruiter to get a deeper look at the team and the work you'd be doing.\n\nTechnical Interview (60 min): Practical coding session focused on code fluency and system design (For frontend roles, we will focus on React-specific questions. For backend roles, we take a technology-agnostic approach.)\n\nTechnical Interview (45 min): A system design-focused interview assesses your knowledge of building product-ready systems.\n\nOnsite/Virtual Interviews (2-3 hrs): Hosted in our office if located in the Bay Area or virtual, with three rounds:\nPractical Coding: Tackle real-world coding tasks with debugging.\n\nSystem Design: Architect a production-ready system.\n\nExisting codebase","description_format":"text","description_chars":5005,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Internet reimbursement","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Conversational AI","Speech & Audio AI","AI Agents","Contact Center Software"],"lifecycle":[{"event":"open","at":"2025-10-06T13:12:52Z"},{"event":"open","at":"2026-09-25T18:08:30Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 12","filings_12m":12,"filings_prev_12m":3,"green_card_filings_12m":0,"median_offered_wage_usd":248750,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":10}],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.277,"p_room":0.28,"age_days":374,"expected_fill_days":39,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":300000,"is_top_pay":true},"html_url":"https://alion.io/job/retell-ai-senior-software-engineer-full-stack","json_url":"https://alion.io/job/retell-ai-senior-software-engineer-full-stack.json","meta":{"generated_at":"2026-10-16T20:30:55Z","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":1139,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":4592},"rest":"https://alion.io/mcp/rest/get_company?id=4592"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fretell-ai-senior-software-engineer-full-stack"},{"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%2Fretell-ai-senior-software-engineer-full-stack"},{"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%2Fretell-ai-senior-software-engineer-full-stack"},{"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/retell-ai-senior-software-engineer-full-stack\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fretell-ai-senior-software-engineer-full-stack"}]}