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We're hiring a Senior Software Engineer for an early-stage, US-based AI software company. You'll own large product features end to end, from a loosely defined spec to production, on a small team that ships fast while the product finds its market. This is a full-time, fully remote role on US Pacific hours.
What you'll do
Turn large, loosely defined product specs into technical plans, milestones and shipped code
Build across the stack: Python and FastAPI on the backend, React and TypeScript on the frontend
Design data models across BigQuery (SQL) and Firestore (NoSQL)
Push toward higher automation rates for customers, so the product does more of the work for them
Surface issues early, take initiative and own your projects from design through production
Get your engineering plans reviewed and signed off by the team, and bring product questions to leadership
Use AI coding tools in a disciplined workflow, while fully understanding the code you ship
Join the on-call rotation and keep production healthy
You may be a fit if
You have senior-level experience owning large, ambiguous scopes from spec to production
You write strong production Python, ideally with FastAPI or Flask, and work comfortably in React and TypeScript
You model data well across relational/analytical and NoSQL databases
You've built systems that grew in users, traffic or data, and you design for scale
You operate autonomously and proactively, raise problems before they grow, and are reliable on deadlines
You use AI tools daily and review their output carefully
You're energized by fast iteration and comfortable when an experiment fails and the plan changes
You're fluent in English and communicate well in writing, in an async-first team
You can work 9 AM to 6 PM US Pacific Time
You're based in Latin America (Mexico and Central America preferred for time zone overlap)
Nice to have
Early engineer at a startup that grew significantly while you were there
Founder or founding engineer experience or BigTech experience
Shipped AI features: LLM integrations, chatbots, agents or support automation
Experience with SMB-focused SaaS, payments or commerce
What we offer
Full-time, fully remote, long-term role (independent contractor)
Real ownership on a small, senior team with no project managers or process overhead
A flexible day: no time tracking, you're judged on what you ship