Our product and technology are always evolving, so being a fast learner matters more than knowing our stack on day one. Here is what we are currently building with:

• Frontend: React, Next.js
• Backend: Node.js, Express, TypeScript, Python, Protobuf
• Data and Infrastructure: PostgreSQL, Redis, Google Cloud Platform, Terraform

🧩 WHAT YOU NEED

• Ownership and DRI mindset: You own problems end to end, create clarity when none exists, and take responsibility for outcomes without waiting to be told what to do next.
• Full stack depth with a backend focus: Strong TypeScript and Node.js fundamentals, comfortable across the stack, solid on API design, async processing, failure handling, and data modelling.
• Judgment under ambiguity: You make high-quality trade-offs between speed, correctness, and long-term system health. You choose simple and scalable where others over-engineer.
• Product and customer mindset: You think in customer problems, not tickets. You have talked to users and used what you learned to change what you built.
• Learning speed: You close gaps independently and with urgency. You do not need a long ramp-up or structure to orient yourself.
• Execution and reliability: You have shipped things that mattered and felt personally responsible when they did not work. You design for failure from the start.
• Influence and leverage: You make the engineers around you faster and better through how you write code, share context, and raise issues.

🚀 WHAT’S IN IT FOR YOU

• Foundational role: Help shape a category-defining company from an early stage, working directly with founders and a small, high-agency team.
• Cutting-Edge Technology: Work at the forefront of the AI revolution in a product where AI is core, not bolted on
• Meaningful ownership: Competitive equity in a company scaling rapidly towards $10m ARR, where your impact will directly shape the outcome.
• Cutting-edge product and tech: Work at the intersection of AI and finance, building systems that fundamentally change how companies run their financial close.
• High-calibre team: Collaborate with people from companies like Uber, Plaid, Miro, and Mollie.
• Exceptional workspace: Our London HQ is based in Fora — a modern, design-led space in the heart of the city with access to a gym, classes, and an environment built for focused, in-person building
• Strong team culture: We run regular socials and off-sites that bring the team together properly, we recently have our 2-year anniversary party in Amsterdam, with board games, a tarot card reader and live music 🎶

🤝 THE HIRING PROCESS

We move fast. Most candidates complete the full process within two weeks

• Step 1: 30 min intro chat with our TA team to learn more about Stacks and get genuinely excited about what we are building
• Step 2: 45 min product and tech chat to explore how engineering and product collaborate at Stacks and what ownership really looks like here
• Step 3: 60 min coding session, a focused moment for you to tackle a real engineering problem the way you would on the job
• Step 4: 60 min system design, your chance to show how you translate product requirements into technical architecture and make trade-offs that matter
• Step 5: 45 min onsite conversation with our Founder about Stacks culture, values, and the journey ahead
• Step 6: Offer. If we have gotten this far, we are excited about you and we will make that clear