Senior Software Engineer - Infrastructure
Probook, a NYC startup building an AI operating system for home services, is hiring its first dedicated Infrastructure Engineer. Day to day: own production infrastructure for real-time AI products and build agent infrastructure (sandboxes, eval harnesses, CI/CD, coding-agent fleets). In-office 5 days/week in Manhattan.
- Compensation
- $200K–$250K / yr
- Location
- Manhattan
- Work setup
- Onsite
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 3+ years
- Category
- Software engineering
- Posted
Skills
Must have
- 3–6 years of engineering experience with meaningful ownership over infrastructure projects
- Experience building infrastructure at a fast-growing startup or on a team building new systems from 0 to 1
- Enjoys solving product-driven engineering problems through an infrastructure lens
- Comfortable moving across the stack when the problem calls for it
- Experience working in high-growth, high-ambiguity environments where priorities change quickly
- Strong infrastructure fundamentals across cloud infrastructure, distributed systems, networking, CI/CD, and observability
- Experience building production infrastructure that engineers and customers rely on
- Track record of owning infrastructure end-to-end, from design through production
- Strong engineering judgment on when to invest in architecture vs optimize for speed
- In-office, 5 days a week in Manhattan
Full description
Who we are
Probook is the AI operating system for home services. We started with dispatch, the decision that determines how a $750B industry makes its money, and have since built across the rest of the front office. Our customers do $10M to $100M a year in revenue and run their operations on us.
Dispatch was the first step. The harder problems are ahead of us.
Our team: 2x IMO medalists, 3x ICPC World Finalists and coaches, a Columbia professor, former founders, MIT, Waterloo, GT, and engineers from Citadel Securities, Stripe, Palantir, Two Sigma, and Meta.
What we want you to own
- Product infrastructure. Build and operate the infrastructure behind our real-time decision systems — durable execution, workflow orchestration, reliability, and performance for products customers run their business on.
- Agent infrastructure. Build the sandboxes, evaluation infrastructure, and harnesses our engineers use to develop and ship agent workflows, including the compute environments agents execute in.
- The developer platform. CI/CD, deployment, local development, and internal tooling — the abstractions that let the team ship in days rather than quarters.
- Reliability and observability. Instrumentation, monitoring, incident response, and debugging tooling for systems whose failure modes are often probabilistic rather than deterministic.
- Cost and scale. Cloud and inference costs as the product footprint grows, and capacity and architecture decisions made before they become bottlenecks.
- Partner across engineering. Work directly with the product engineers building on your infrastructure, and with the customers affected by it.
Who this is for
- 3–6 years of engineering experience with meaningful ownership of infrastructure you built rather than inherited.
- Zero-to-one experience. You've built infrastructure from scratch at a startup, or stood up new systems on a team inside a larger company.
- Strong infrastructure fundamentals across distributed systems, cloud infrastructure, networking, CI/CD, and observability.
- Real software engineering. Infrastructure at Probook means writing code and owning complex systems end to end, from design through production.
- Breadth over depth. You'd rather build new systems than operate mature ones, and you move up the stack when that's where the problem is.
- Judgment. You know when a system deserves careful architecture and when it deserves to be finished this week.