{"schemaVersion":"jobsearcher.job.v1","id":"bb7bbebfbb2dcd0f2f9c8982","url":"https://jobsearcher.com/jobs/bb7bbebfbb2dcd0f2f9c8982","canonicalUrl":"https://jobsearcher.com/jobs/bb7bbebfbb2dcd0f2f9c8982","title":"Senior Full Stack Engineer (Back-End)","description":"Senior Full Stack Engineer (Back-End)\r\nThis is a full‑time, in‑person role based in San Francisco (Presidio). You must be based in the Bay Area or willing to relocate before starting. We require US work authorization, but are open to O‑1 visa sponsorship for truly exceptional candidates.\r\nWhat You’ll Do\r\nYou’ll write and ship full‑stack features end to end, from the agent runtime and backend APIs, to the web and desktop UI that users interact with every day.\r\nWe're still ~15 people and shipping to our first paying users. You won’t just be building features, you’ll be making the decisions that determine whether this system holds at 1000x the current load.\r\nYou’ll work directly with our CTO. Here are a few examples of the kinds of things you might work on:Build and operate the sandbox infrastructure where agents execute code, process isolation, resource limits, secure credential handling across thousands of concurrent sessions.\r\nDesign the deployment and migration pipeline for a Cloudflare Workers + Fly.io architecture, including blue‑green rollouts and canary patterns.\r\nInstrument real‑time workloads end to end: SSE streaming, task queues, and multi‑model LLM provider routing.\r\nShip new backend capabilities, tool integrations, scheduled task execution, memory indexing, and see them used by real people the same week.\r\nReduce operational toil for a small team: structured logging, tracing, monitoring, and incident response tooling that actually works at our scale.Stack\r\nTypeScript, Cloudflare Workers, Durable Objects, Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, Vite.\r\nWho You Are\r\nMinimum5+ years of engineering experience building and operating backend systems in production. You’ve been on‑call.\r\nFluent in TypeScript and comfortable working across the stack, but instinctively deeper on the backend.\r\nBuilt real‑time systems: WebSockets, SSE, event streaming, or message queues in production.\r\nDistributed systems intuition, understand consistency tradeoffs, and hold opinions about them.\r\nShipped infrastructure to real users, not just internal tooling.Bonus (but Not Required)Worked with Cloudflare Workers, Durable Objects, or serverless compute at the edge.\r\nBuilt agent systems, model routing layers, or tool‑use architectures with LLMs.\r\nBeen a founder or early‑stage engineer and care deeply about product.Compensation & Benefits\r\nBase salary: $180K–$240K + meaningful early‑stage equity + health, dental, 401(k).\r\nThe ProcessApplication: Submit your resume and answer a few short questions.\r\n15‑minute intro call: Quick check to align on location, motivation, and logistics.\r\n45‑minute technical interview: Work through a real backend problem.\r\nSystem design interview: Deep dive into how you architect systems, using a real Wordware problem.\r\nFinal conversation: Answer your questions and scope the work trial.\r\nWork trial: Paid trial to work on a real project in person with us, usually a few days to two weeks.About the company\r\nWordware (YC S24)\r\n#J-18808-Ljbffr","company":"SupportFinity","rawCompany":"supportfinity","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-10-04T03:08:02.832Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Full Stack Engineer (Back-End)","description":"Senior Full Stack Engineer (Back-End)\r\nThis is a full‑time, in‑person role based in San Francisco (Presidio). You must be based in the Bay Area or willing to relocate before starting. We require US work authorization, but are open to O‑1 visa sponsorship for truly exceptional candidates.\r\nWhat You’ll Do\r\nYou’ll write and ship full‑stack features end to end, from the agent runtime and backend APIs, to the web and desktop UI that users interact with every day.\r\nWe're still ~15 people and shipping to our first paying users. You won’t just be building features, you’ll be making the decisions that determine whether this system holds at 1000x the current load.\r\nYou’ll work directly with our CTO. Here are a few examples of the kinds of things you might work on:Build and operate the sandbox infrastructure where agents execute code, process isolation, resource limits, secure credential handling across thousands of concurrent sessions.\r\nDesign the deployment and migration pipeline for a Cloudflare Workers + Fly.io architecture, including blue‑green rollouts and canary patterns.\r\nInstrument real‑time workloads end to end: SSE streaming, task queues, and multi‑model LLM provider routing.\r\nShip new backend capabilities, tool integrations, scheduled task execution, memory indexing, and see them used by real people the same week.\r\nReduce operational toil for a small team: structured logging, tracing, monitoring, and incident response tooling that actually works at our scale.Stack\r\nTypeScript, Cloudflare Workers, Durable Objects, Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, Vite.\r\nWho You Are\r\nMinimum5+ years of engineering experience building and operating backend systems in production. You’ve been on‑call.\r\nFluent in TypeScript and comfortable working across the stack, but instinctively deeper on the backend.\r\nBuilt real‑time systems: WebSockets, SSE, event streaming, or message queues in production.\r\nDistributed systems intuition, understand consistency tradeoffs, and hold opinions about them.\r\nShipped infrastructure to real users, not just internal tooling.Bonus (but Not Required)Worked with Cloudflare Workers, Durable Objects, or serverless compute at the edge.\r\nBuilt agent systems, model routing layers, or tool‑use architectures with LLMs.\r\nBeen a founder or early‑stage engineer and care deeply about product.Compensation & Benefits\r\nBase salary: $180K–$240K + meaningful early‑stage equity + health, dental, 401(k).\r\nThe ProcessApplication: Submit your resume and answer a few short questions.\r\n15‑minute intro call: Quick check to align on location, motivation, and logistics.\r\n45‑minute technical interview: Work through a real backend problem.\r\nSystem design interview: Deep dive into how you architect systems, using a real Wordware problem.\r\nFinal conversation: Answer your questions and scope the work trial.\r\nWork trial: Paid trial to work on a real project in person with us, usually a few days to two weeks.About the company\r\nWordware (YC S24)\r\n#J-18808-Ljbffr","datePosted":"2026-10-04T03:08:02.832Z","dateModified":"2026-10-04T03:08:02.832Z","hiringOrganization":{"@type":"Organization","name":"SupportFinity","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"bb7bbebfbb2dcd0f2f9c8982"},"url":"https://jobsearcher.com/jobs/bb7bbebfbb2dcd0f2f9c8982"}}