Senior Product Engineer

The role

You will own the product surface of Sauna, focusing on the interfaces used to delegate work, monitor progress, and manage memory. This is a product role with a frontend center of gravity involving interaction design, client architecture, and full-stack feature ownership.

What you will do

• Own the product surface of Sauna
• Develop delegation primitives for handing work to Sauna and following progress
• Build surfaces for visible memory where users see and correct what Sauna has learned
• Create surfaces for routines and apps including backends, data, and URLs
• Develop connected Saunas for shared real-time sessions
• Maintain a consistent assistant experience across web, iOS, iMessage, Slack, and email
• Build a local-first client with TanStack Query and IndexedDB persistence
• Manage the funnel from landing page to trial to paying team
• Own full-stack features from migration and routes to UI and analytics
• Ship, get feedback, and iterate autonomously

Required qualifications

• Must be based in the Bay Area or willing to relocate before starting
• Must have US work authorisation (O-1 or J-1 visa sponsorship available for exceptional candidates)
• Shipped complex web products and owned them after launch
• Experience with multiplayer experiences, large-data apps, or streaming/realtime UIs
• Deep knowledge of React including state management and component reuse
• Comfortable owning a full-stack feature end to end
• Ability to explain caching, invalidation, and optimistic-update choices
• Autonomous and low ego

Nice to have

• Built UIs for LLM-based products
• Real-time collaboration (CRDTs, Y.js, Automerge, or a homegrown equivalent)
• Local-first architectures and sync strategies
• Design background or a strong visual sense
• Founding or early frontend engineer who set standards from scratch

Benefits

• health
• dental
• 401(k)
• generous PTO
• gym budget
• lunch

Before you apply

• Must be based in the Bay Area or willing to relocate before starting
• Requires US work authorisation (O-1 or J-1 visa sponsorship available for exceptional candidates)
• Application requires resume, links, and one thing you've shipped that you're proud of
• Process includes a system design interview and a paid work trial

About the company

Sauna is an AI assistant that does work for you by connecting to tools like Gmail, Calendar, Slack, Linear, and Notion. It is built by Wordware, a team of about 20 in the Presidio in San Francisco.