Probook is the AI dispatching software for the $700B home services space (think plumbers, electricians, HVAC technicians, etc.). Matching technicians to the right jobs can mean the difference between a $300 band-aid fix and a $20,000 system replacement, yet this process is currently manual and rarely data-driven.

Probook changes that. We fully automate dispatching using AI, optimizing for outcomes that drive revenue and customer satisfaction. Since emerging from stealth, we’ve grown rapidly—bootstrapping to $4M in ARR within 9 months and operating cash-flow positive from day one. Our growth has been driven by obsessive customer focus and relentless execution.

We’re an in-office team working six days a week (Sunday through Friday), and our culture is shaped by three core values:

• 🦺 Blue Collar – For our engineers, this means being passionate about building software with real impact for people in the trades—real working-class Americans. It means eagerly jumping on customer calls to deeply understand their pain points and translate them into effective solutions.

• 💵 3-Month Runway Mentality – Engineers at Probook prioritize shipping speed and execution. We're thoughtful with design, but we focus on building what's most effective for our customers, not over-engineered solutions just because they're "cool. " We understand trade-offs and deliver value today.

• 🔧 Low Maintenance – This value for engineers means we're focused on execution, uphold a high engineering bar, and are accountable for deadlines, doing whatever it takes to deliver for our customers. We're on the same team, avoiding politics to deliver results.

We grow by delivering real value. Every customer is onboarded in person, and our product spreads through word of mouth—not a GTM team. We’re a high-performance team, built for intensity and outcomes. Every member of Probook is an A-player—sharp, driven, and committed to excellence—with a track record of excelling in high stakes environments. As an engineer here, you'll work on products with direct and measurable impact on the company's growth. Every feature you build directly drives net new ARR, and our growth is a testament to building a product so good that our customers rave about us, fueling inbound interest and

expansion.

This isn't just a job; it's a proving ground for future founders. At Probook, you'll gain direct, hands-on experience in every aspect of building a hyper-growth company, from working intimately with customers to shape our product, to understanding the mechanics of our rapid revenue generation. We are world-class at product discovery and boast a stronger PMF than most series B/C companies. We know precisely what our customers want and what needs to be built in the next 3-6 months. For us, the risk isn't product or market; it's our own ability to execute and build a product so valuable that our customers can't live without us. This is a unique opportunity for a future founder to come in, own an entire product from 0 to 1 with high autonomy within a structured environment, learning exactly how we've figured out to build and scale at Probook. If you're looking for the real startup grind—the kind that demands everything and gives back even more—this is it.

WHAT WE’RE LOOKING FOR

Probook is seeking a highly driven founding backend product engineer to join our team. In this pivotal role, you'll work directly with our CTO, Lewis, to rapidly build and deploy the core AI use cases for our customers, shaping the technical foundation of our product from the ground up.

While some frontend experience is a plus, your core strength and passion should lie in robust backend systems. You're someone who can:

• Ship new product features at an exceptional pace, with a strong bias for action.

• Demonstrate a passion for tackling hard technical and applied research problems.

• Quickly integrate into and master an existing codebase, becoming productive within the first two days.

• Exhibit an exceptionally high level of technical achievement (e.g., success in hackathons or coding/math competitions, having built something highly impressive, or experience as a past founder). We actively seek this during our interview process.

• Possess very strong coding fundamentals (e.g., capable of passing a quant dev interview) while also championing AI coding tools as a significant force multiplier.

• Have a strong product sense, understanding what customers truly need and how tobuild features that deliver value. You're deeply invested in the outcome.

• Architect well-designed systems that are robust and scalable, avoiding hacky, band-aid fixes.

WHAT YOU'LL DO

• Collaborate closely with our CTO, Lewis, to rapidly prototype and build the initial set of AI use cases for our customers, primarily focusing on backend development.

• Be prepared to ship impactful features from day one. Projects that might span quarters at larger tech companies will be weekend sprints for you.

• Stay ahead of the curve, constantly integrating state-of-the-art frameworks and tools for building high-quality GenAI applications.

YOUR BACKGROUND LOOKS SOMETHING LIKE THIS:

• 2-6 years of focused experience in backend product engineering.

• Preferably, this experience was gained at fast-growing, early-stage startups (ideally AI/ML startups), or as a successful past founder/founding engineer with a proven track record in AI product development.

• Demonstrated experience working directly with customers and a history of shipping features quickly to meet user needs.

WHO YOU ARE:

• A selfless teammate who consistently shows up for others, owns the hard stuff, and leads by example without needing the spotlight.

• Comfortable giving and receiving direct, constructive feedback without ego or defensiveness.

• Treats company resources like their own—budget-conscious and thoughtful with spending.

• You're internally driven to go the extra mile, not because anyone's watching, but because that's who you are.

BENEFITS

• Medical, dental, and vision benefits

• Take what you need vacation policy

• Monthly food stipend for lunches and dinners

• Unlimited office snacks and beverages