Senior Software Engineer

Probook AI Operating SystemProbook is the AI Operating System for the home services industry, transforming how plumbing, HVAC, and electrical businesses operate.Our impact is real. Dispatching the right technician to the right job can mean the difference between a $300 "band-aid" fix and a $20,000 system replacement. By automating previously high-touch workflows around-the-clock, Probook ensures a consistent customer experience without the need for 24/7 live staffing. We unify our customers' processes into a single, scalable platform, giving businesses one place to run their entire dispatch operation.The OpportunityThis is not a role where you'll work on incremental features—you'll architect and ship the fundamental capabilities that define our platform.Every feature you build will directly impact ARR. You'll see your work drive customer adoption in real-time, informed by direct customer feedback from our in-person onboarding process.This is the ground floor of a category-defining company. The systems you build in the next 12 months will scale revenue.What You'll DoBuild and deploy production AI systems that automate complex decision-making for thousands of service businessesShip features at a pace that would be quarterly initiatives at larger companies—expect weekend sprintsWork directly with customers to understand their workflows and translate needs into technical solutionsIntegrate state-of-the-art AI frameworks and tools into production systemsArchitect scalable backend infrastructure that supports rapid growthOwn critical product features end-to-end, from design through deploymentWhat We're Looking ForTechnical ExcellenceExceptional coding fundamentals—comfortable with quant-level technical problems while leveraging AI coding tools as force multipliers2-6 years of backend engineering experience, ideally at fast-growing early-stage startups or as a founding engineerTrack record of building impressive systems or products (we actively evaluate for this in interviews)Ability to master an existing codebase and ship meaningful contributions within 48 hoursExecution & JudgmentExtreme bias for action—you ship fast without sacrificing qualityStrong product sense and customer empathy—you understand what users need and how to deliver valueArchitectural judgment—you build robust, scalable systems, not fragile quick fixesComfort with ambiguity and rapid context-switchingWhy Join Now?You're joining at the exact inflection point where the technical foundation is still being built — your architecture decisions will matter for years. The team is small enough that you'll shape company culture and technical standards.In 12 months, this role will exist, but it won't be this role. Right now, you can still define everything.Why Join Probook?The Tailwinds: $700B industry with clear tailwinds: AI adoption, labor shortages, and generational transitions creating demand for operational modernization. We are defining the category, not fighting for share.The Traction: $XXM ARR in 18 months. Cash-flow positive. Product-market fit proven; now we're scaling.Funding: $40M raised from Sequoia and Andreessen HorowitzThe Team: >60 people, our founding team comes from the space and has spent thousands of days onsite with our customers. We live the space. We're also becoming one of the most talent-dense start-ups in NYC (MIT, Harvard, UPenn M&T, Waterloo, Citadel, Palantir, ICPC world finalists, IMO Gold Medalists).Compensation & BenefitsEquity: Meaningful early-stage equitySalary: $200K – $250KHealth: Comprehensive medical, dental, and visionPerks: $500 monthly Ramp card for commuting, meals, gym, etc. (plus $25 in nightly meal delivery credit) and really good office snacksAccess: Direct access to world-class investors and advisors