Senior Platform Engineer
About the role
Senior hands-on platform/backend engineer focused on building and maintaining the agent runtime and execution engine for Wordware's Sauna AI agents. In-person role based in San Francisco, US work authorization required; visa sponsorship available for exceptional candidates.
Responsibilities
- Build and improve the runtime that starts agent work, carries session state through tool calls, and resumes interrupted runs.
- Choose between actors and jobs for different kinds of work and implement the decision, considering overlapping sessions.
- Design how long-running processes drain or resume when code changes, keeping in-flight work accounted for across releases.
- Handle retries and timeouts around tool calls, including edge cases where actions succeed but responses are delayed or missing.
- Make runtime failures traceable, diagnose why a run stopped or stalled, fix the execution path, and deploy to production.
Qualifications
- Built and operated stateful backend systems in production, including long-running work.
- Ability to justify architectural decisions between actors, background jobs, or simpler services and demonstrate shipped outcomes.
- Experience debugging concurrency, retries, or recovery in owned code.
- Proficiency with TypeScript and a desire to continue coding in scope expansion.
Skills
Benefits
- health, dental, 401(k), considerable PTO, gym budget, lunch
About Wordware
AI agents you can rely on
AI Agents have arrived. They are powerful enough to read, plan, and act across your everyday life and work. The question is no longer whether they can run canned demos to check the weather, it’s whether real teams can rely on them for critical work. We optimize for adoption over spectacle: useful, accountable systems that help top professional complete real tasks. Wordware is backed by Spark Capital, Felicis, and Y Combinator, with a $30M seed round. Our beautiful, historic San Francisco office sits in the shadow of the Golden Gate Bridge, it’s full of plants and radiates innovation and calm. We genuinely love working together. At lunch we talk about alignment and AI consciousness, we have surfboards in the office ready to use, we take walking meetings on the beach and hang out after work at the bar or climbing wall. We work really hard because we care deeply about what we do. Sauna is Wordware’s AI workspace for professionals. Think ‘Cursor for Knowledge Work’ and you’re halfway there. With explicit permission, it connects to tools like Gmail, Calendar, Slack, and thousands more, to gather the right context to move your work forward. It learns who you are, drafts and refines your documents, presentations, and datasets, researches across the web and your org’s internal knowledge, summarizes long threads to cut through the noise, proposes next steps, even acts on your behalf when enabled. You can work with Sauna live, side-by-side, or schedule jobs to run automatically in the background, with clear permissions and easy off-switches. Sauna brings the power of AI Agents to all professionals.
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