> Markdown version of [/jobs/ext/2713047-full-stack-engineer](https://www.wearedevelopers.com/jobs/ext/2713047-full-stack-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Engineer - **Company:** SAUNA WOODWORK BY DESIGN - **Location:** San Francisco, CA, United States - **Experience:** Expert - **Salary:** $180,000.0 - $240,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Desktop Computing, Distributed Systems, Middleware, Design of User Interfaces, Human-Computer Interaction, PostgreSQL, Queueing Systems, Next.js, Data Streaming, TypeScript, WebSocket, Data Logging, Network Routing, Real Time Systems, ReactJS, Large Language Models, Backend, Webpack, Cloudflare, Serverless Computing, Docker - **Published:** September 4, 2026 - **Apply:** https://www.careerbuilder.com/job-details/senior-full-stack-engineer-back-end-san-francisco-ca--09b1eea4-7b67-49db-ac7f-5cf401c14343 ## About the Role * You have 5+ years of engineering experience building and operating backend systems in production. You've been on-call. * You're fluent in TypeScript and comfortable working across the stack, but your instinct is to go deeper on the backend. * You've built real-time systems: WebSockets, SSE, event streaming, or message queues in production. * You have distributed systems intuition, you understand consistency tradeoffs and have opinions about them. * You've shipped infrastructure to real users, not just internal tooling. Bonus (but not required): * You've worked with Cloudflare Workers, Durable Objects, or serverless compute at the edge. * You've built agent systems, model routing layers, or tool-use architectures with LLMs. * You've been a founder or early-stage engineer and care deeply about product., Application Programming Interface (API), Artificial Intelligence (AI), Desktop PC, Distributed Computing, Engineering, Incident Response, Machine Tool, Memory Hardware, Messaging Middleware, Network Routing, On Call, Production Systems, User Interface/Experience (UI/UX) ## Description You'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. We're still ~20 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. What You'll Do: You'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. * Design the deployment and migration pipeline for a Cloudflare Workers + Fly.iohttp://Fly.io architecture, including blue-green rollouts and canary patterns. * Instrument real-time workloads end to end: SSE streaming, task queues, and multi-model LLM provider routing. * Ship new backend capabilities, tool integrations, scheduled task execution, memory indexing, and see them used by real people the same week. * Reduce operational toil for a small team: structured logging, tracing, monitoring, and incident response tooling that actually works at our scale. * Plus whatever you see that needs building. Stack: TypeScript, Cloudflare Workers, Durable Objects, Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, Vite ## Related Videos - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Micro Frontends with Module Federation: Why and How?](https://www.wearedevelopers.com/videos/165-micro-frontends-with-module-federation-why-and-how) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 139 - Soft and hard queries](https://www.wearedevelopers.com/magazine/487-dev-digest-139-soft-and-hard-queries)