Senior Full Stack Engineer (Back-End)

Wordware; California (MO); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

401(k) plan

Equity participation

Job summary

Wordware is seeking a Senior Full Stack Engineer based in San Francisco (Presidio) for a full-time, in-person role. The ideal candidate will have 5+ years of experience and be proficient in TypeScript, focusing on backend systems. Responsibilities include building full-stack features and designing deployment pipelines.

Compensation includes a base salary of $180K–$240K, along with equity and benefits such as health and dental insurance.

Qualifications

• 5+ years of engineering experience building backend systems in production.
• Fluent in TypeScript; comfortable working across the stack.
• Experience with real-time systems like WebSockets or event streaming.

Responsibilities

• Write and ship full-stack features end to end.
• Build and operate sandbox infrastructure where agents execute code.
• Design deployment and migration pipeline for architecture.

Skills

TypeScript

Backend Systems

Real-Time Systems

Distributed Systems

Tools

Docker

Postgres

Vercel AI SDK

Job description

Please read first

• This is a full-time, in-person role based in San Francisco (Presidio) - we work from the office 5 days a week.

• You must be based in the Bay Area or willing to relocate before starting.

• We require US work authorisation, but are open to O-1 visa sponsorship for truly exceptional candidates.

Senior Full Stack Engineer (Back-End)

What You'll Do

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 ~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.

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.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.

Stack

TypeScript, Cloudflare Workers, Durable Objects, Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, Vite

Who You Are

Minimum

• 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.

Compensation & Benefits

Base salary: $180K–$240K + meaningful early-stage equity + health, dental, 401(k).