# FoundingProduct Engineer > Canonical page: https://briefcase.so/careers/founding-product-engineer > Briefcase content index: https://briefcase.so/llms.txt Join Briefcase as a Founding Product Engineer. London, Onsite. [All jobs](https://briefcase.so/careers) LondonOnsiteFounding team Join the team replacing the knowledge worker in accounting. A $700B+ industry, rebuilt from the ground up with AI. [Apply now](https://briefcase.so/careers/founding-product-engineer/apply) The mission ## We're replacing the knowledge worker Accounting is a **$700B+ industry** still run on manual processes and human judgement. We're building the leading AI-native platform to replace it; a fleet of 20+ AI agents running in production today, automating what used to require entire teams. Humans stay in the loop only when it genuinely matters. We are not building a tool. We are replacing the knowledge worker. The team ## People who love to build A top-performing, highly ambitious group working together in our London office. These things matter to us: ### Agency Everyone owns and prioritises their own work. No asking for permission. ### Product obsession We redefine workflows from first principles; opinionated, and aiming for simplicity. ### Everyone codes Everyone ships. We deploy to production 30-40 times a day. ### High-velocity Rapid experimentation, lean autonomous teams, and minimal bureaucracy. ### AI first We use AI to move faster with higher-quality results, across every part of the business. ### Excellence We hold ourselves to the highest standard in everything we ship. Good enough is never enough. ![The team](https://briefcase.so/marketing/team/img3133.jpg) ![The team](https://briefcase.so/marketing/team/img2226.jpg) ![All of us enjoying a team social](https://briefcase.so/marketing/team/team-social.jpg) ![Sara creating custom merch](https://briefcase.so/marketing/team/sara.jpg) ![George repping the Briefcase](https://briefcase.so/marketing/team/george.jpg) ![Team offsite](https://briefcase.so/marketing/team/img2709.jpg) The role ## What you'll own πŸ› οΈ Own and ship core product end-to-end You set the bar, define the solution, and put it in production. No hand-offs, no waiting for sign-off. 🧠 Make high-leverage architectural decisions Define a category-leading platform at real scale. Your decisions will have lasting impact. πŸ€– Build and push the boundaries of our AI agent fleet 20+ agents in production and rapidly growing. You'll be at the frontier of what's possible. 🀝 Work directly with customers Understand the real problem, not a distilled brief. You'll shape the product from first-hand insight. πŸš€ Genuine ownership from day one No ticket queues, no hand-offs, no waiting for permission. Just you and the problem. Who you are ## About you You have a track record of outperforming your peers; whether that's a first from a top university, a scholarship, a hackathon win, a national ranking in sport or chess, or simply being the best at whatever you set your mind to. You thrive in fast-paced environments; you've worked at a high-growth startup, built something yourself, have founding experience, want to become a founder β€” or simply love being in a startup environment. You are self-motivated and thrive in a high-agency environment. You are impatient and bias heavily towards shipping. You want maximum responsibility and ownership from day one. You hold yourself to a high technical bar and care deeply about the craft. You are very curious and a fast learner, comfortable moving across the stack. Perks ## Benefits πŸ’° Competitive salary + founding team equity πŸ–οΈ 25 days holiday πŸ’» MacBook provided πŸ• Free team lunch every Friday ⚽ Weekly team sport social ✈️ Annual offsite; last year, Mallorca Further reading ## Resources [ ![Our culture](https://briefcase.so/marketing/blog/how-we-build-briefcase.jpg) Engineering9 Mar 2026 ### Our culture A company is just a group of people. Briefcase is a group of people that are naive enough to think we will change the world. 5 min readRead ](https://briefcase.so/blog/our-culture)[ ![Building autopilot](https://briefcase.so/marketing/blog/building-autopilot.png) Engineering9 Nov 2025 ### Building autopilot Probabilistic AI agents paired with deterministic formal verification create the perfect combination for high trust domains like finance and accounting. 15 min readRead ](https://briefcase.so/blog/building-autopilot)[ ![Building Tax-Aware AI](https://briefcase.so/marketing/blog/building-tax-aware-ai.png) Engineering15 Dec 2025 ### Building Tax-Aware AI When an AI agent classifies a transaction's VAT treatment, it shouldn't be guessingβ€”it should cite the exact HMRC guidance it relied on. 12 min readRead ](https://briefcase.so/blog/building-tax-aware-ai) [ ![Cursor x Briefcase: FinTech London Hackathon](https://images.lumacdn.com/cdn-cgi/image/format=auto,fit=cover,dpr=2,background=white,quality=75,width=400,height=400/event-covers/rn/4c00276e-c611-47ec-8d13-c7a3877ed628.png) Past Events Cursor x Briefcase: FinTech London Hackathon 150 developers. One evening. Build AI-powered fintech tools with Cursor; hosted by Briefcase and White Circle at Halkin, London. lu.ma/2ohizf10 β†— ](https://lu.ma/2ohizf10) Join us ## Ready to apply? We read every application personally. Takes 2 minutes. [Apply now](https://briefcase.so/careers/founding-product-engineer/apply)