{"schemaVersion":"jobsearcher.job.v1","id":"f929d9f2f7464d83deaae2e7","url":"https://jobsearcher.com/jobs/f929d9f2f7464d83deaae2e7","canonicalUrl":"https://jobsearcher.com/jobs/f929d9f2f7464d83deaae2e7","title":"Senior Full Stack Engineer (Back-End)_TT","description":"We're looking for a Senior Full Stack Engineer with a strong backend focus to build and scale the core infrastructure of a fast-growing AI platform. You'll work directly with the CTO on backend systems, agent runtimes, and real-time infrastructure as the company brings on its first paying users. The work centers on TypeScript at the edge: Cloudflare Workers, Durable Objects, and Postgres, with SSE streaming, task queues, and routing across multiple LLM providers. You'll be comfortable across the stack, but your instinct is to go deeper on the backend and take ownership of reliability and operational excellence. The team is small, direct, and high-energy, and engineers are trusted to own big problems end-to-end. It's a great fit for a senior engineer with startup DNA who has shipped production infrastructure that real users depend on.Details:Schedule: Full timeLocation: San Francisco, United States (Onsite, 5 days a week; relocation before start is possible)Start: ASAPDuration: Long-termEnglish: FluentType of collaboration: Internal EmploymentAbout the project: The company is a well-funded, seed-stage AI startup that has raised $30M to build a hybrid AI and software platform. The product acts as a shared brain for user context, bringing together information and actions so AI agents can do useful work for people. The team is about 15 people and growing, and many of them are former founders or CTOs. It is now onboarding its first paying users, so scaling the backend reliably is a top priority. The architecture combines Cloudflare Workers and Fly.io, with modern practices like blue-green rollouts and canary releases. This is a chance to shape the core infrastructure of an ambitious AI product at a very early stage.You have:5+ years of experience building and operating backend systems in production, including on-call responsibilityFluent TypeScript and comfort across the stack, with a clear preference for going deep on the backendExperience building real-time systems in production, such as WebSockets, SSE, event streaming, or message queuesStrong distributed systems intuition, including a solid understanding of consistency tradeoffsInfrastructure you've shipped to real external users, not only internal toolingA working understanding of LLM agent loops and model interaction patterns (ML engineering depth is not required)Based in the San Francisco Bay Area or willing to relocate before starting; US work authorization (O-1 or J-1 sponsorship possible for exceptional candidates)A direct, proactive communication style suited to a small, in-person teamOpenness to a paid in-person work trial on a real project, from a few days to two weeksNice to have: experience with Cloudflare Workers, Durable Objects, Fly.io, or other edge/serverless computeNice to have: experience building agent systems, model routing layers, or LLM tool-use architecturesNice to have: background as a founder, CTO, or early engineer, ideally at an AI or agentic companyNice to have: hands-on AI side projects or active experimentation with AI toolsFamiliarity with parts of the stack is a plus: Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, ViteWhat to do:Work directly with the CTO to design, build, and scale the core backend infrastructureBuild and operate agent runtimes, including SSE streaming, task queues, and multi-model LLM provider routingDesign distributed systems on Cloudflare Workers, Durable Objects, and Postgres, making clear tradeoffs around consistency and performanceOwn deployments across Cloudflare Workers and Fly.io, using blue-green rollouts and canary patternsSet a high bar for reliability, monitoring, and incident response as the platform onboards its first paying usersContribute across the stack, including React frontend work when neededTake ownership of complex technical problems end-to-end, from design through productionHelp shape engineering practices and culture as the team grows","company":"Pulserise Technologies","rawCompany":"pulserise technologies","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-09-27T09:17:00.467Z","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":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"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)_TT","description":"We're looking for a Senior Full Stack Engineer with a strong backend focus to build and scale the core infrastructure of a fast-growing AI platform. You'll work directly with the CTO on backend systems, agent runtimes, and real-time infrastructure as the company brings on its first paying users. The work centers on TypeScript at the edge: Cloudflare Workers, Durable Objects, and Postgres, with SSE streaming, task queues, and routing across multiple LLM providers. You'll be comfortable across the stack, but your instinct is to go deeper on the backend and take ownership of reliability and operational excellence. The team is small, direct, and high-energy, and engineers are trusted to own big problems end-to-end. It's a great fit for a senior engineer with startup DNA who has shipped production infrastructure that real users depend on.Details:Schedule: Full timeLocation: San Francisco, United States (Onsite, 5 days a week; relocation before start is possible)Start: ASAPDuration: Long-termEnglish: FluentType of collaboration: Internal EmploymentAbout the project: The company is a well-funded, seed-stage AI startup that has raised $30M to build a hybrid AI and software platform. The product acts as a shared brain for user context, bringing together information and actions so AI agents can do useful work for people. The team is about 15 people and growing, and many of them are former founders or CTOs. It is now onboarding its first paying users, so scaling the backend reliably is a top priority. The architecture combines Cloudflare Workers and Fly.io, with modern practices like blue-green rollouts and canary releases. This is a chance to shape the core infrastructure of an ambitious AI product at a very early stage.You have:5+ years of experience building and operating backend systems in production, including on-call responsibilityFluent TypeScript and comfort across the stack, with a clear preference for going deep on the backendExperience building real-time systems in production, such as WebSockets, SSE, event streaming, or message queuesStrong distributed systems intuition, including a solid understanding of consistency tradeoffsInfrastructure you've shipped to real external users, not only internal toolingA working understanding of LLM agent loops and model interaction patterns (ML engineering depth is not required)Based in the San Francisco Bay Area or willing to relocate before starting; US work authorization (O-1 or J-1 sponsorship possible for exceptional candidates)A direct, proactive communication style suited to a small, in-person teamOpenness to a paid in-person work trial on a real project, from a few days to two weeksNice to have: experience with Cloudflare Workers, Durable Objects, Fly.io, or other edge/serverless computeNice to have: experience building agent systems, model routing layers, or LLM tool-use architecturesNice to have: background as a founder, CTO, or early engineer, ideally at an AI or agentic companyNice to have: hands-on AI side projects or active experimentation with AI toolsFamiliarity with parts of the stack is a plus: Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, ViteWhat to do:Work directly with the CTO to design, build, and scale the core backend infrastructureBuild and operate agent runtimes, including SSE streaming, task queues, and multi-model LLM provider routingDesign distributed systems on Cloudflare Workers, Durable Objects, and Postgres, making clear tradeoffs around consistency and performanceOwn deployments across Cloudflare Workers and Fly.io, using blue-green rollouts and canary patternsSet a high bar for reliability, monitoring, and incident response as the platform onboards its first paying usersContribute across the stack, including React frontend work when neededTake ownership of complex technical problems end-to-end, from design through productionHelp shape engineering practices and culture as the team grows","datePosted":"2026-09-27T09:17:00.467Z","dateModified":"2026-09-27T09:17:00.467Z","hiringOrganization":{"@type":"Organization","name":"Pulserise Technologies","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"f929d9f2f7464d83deaae2e7"},"url":"https://jobsearcher.com/jobs/f929d9f2f7464d83deaae2e7"}}