Toronto (Financial District) · In office, five days a week · Full-time The Product Builder owns a product problem from the first client conversation to working software in the client's hands. You find the problem worth solving, decide what to build, and build it with coding agents. About 15Rock 15Rock pairs top experts with custom AI agents and workflows to deliver institutional-grade research and analysis.

Our clients include large asset owners and some of the largest advisory firms in North America. We also work with fast-growing, complex companies on value creation, corporate strategy and M&A;, and we help clients expand into recent markets and industries. 2,000+ companies rebuilt in financial models, from P&Ls; and margins to working capital and unit costs ~US$4B+ in cash tied up in working capital, found in accounting footnotes ~ 1,000+ firms mapped to 170+ defence supply chains, including suppliers that industry codes miss On a drone assembly line, parts spent 99.8% of their lead time waiting. We rebuilt a large North American telecom carrier's management structure from public data and sized more than US$400M in structural savings.

On a long-term naval support contract, more than C$100M in performance fees depended on fleet readiness. We traced the shortfall to slow parts-planning data, not a lack of technicians. For a luxury carmaker, our model showed a planned flagship store would lose money every year on new-car margins alone.

A seasonal location cut modeled occupancy costs by about 90%. Across 66 Canadian hospital networks, we benchmarked 100 indicators per weighted patient case and sized about C$180M in savings from clinical supplies and surgical scheduling. Learn how they work today and where it breaks down.





Build it end to end with coding agents: the interface, the API, the data and the AI workflow behind it. Read the code and test the outputs against the sources. Ship it, watch how people use it, and improve it.

Bid teams want to know what a contract is likely to be awarded at. Estimate what a product should cost to make, using public data and supplier evidence, with every assumption visible. You have shipped software that people use, and you can show it to us.

You use coding agents such as Claude Code or Cursor every day.

You work across the stack: interface, back end and data. You have taken LLM features past the demo stage, with evaluations that tell you when the output is wrong. You can walk a senior client through your work and answer hard questions about it.

Experience in finance, consulting, procurement or public-sector bids Data pipelines that pull from public sources such as company filings and procurement portals Enough design sense to ship a clean interface without a designer Two things to know before you apply This is an in-person job, five days a week in our Toronto office. Equity under the company's equity incentive plan Health and dental coverage AI tools without limits: frontier models and coding agents, no seat caps, no token budget to manage Applying Apply through LinkedIn with your resume and a link to something you built and shipped. A short demo video is welcome.

On that project, what did you decide not to build, and why? Describe a time an AI tool gave you code that looked right and wasn't. 15Rock uses AI-assisted tools to help organize, screen, and assess applications. If you need an accommodation during the hiring process, please tell us what would help. #

📌 Product Builder / Senior Product Engineer — Ai Products (Toronto)
🏢 15Rock
📍 Toronto