Engineering · London
Founding Software Engineer (Staff)
Build the platform that replaces spreadsheets for how engineering organisations plan, measure and attribute the cost of work, human and AI.
We're not able to sponsor visas right now. You'll need to be based in the UK with the right to work here.
The role
You'll work full stack, shipping features that solve real problems for engineering leaders. This isn't a "build to spec" role. You'll talk directly to customers, shape what we build and own your work end-to-end.
We don't have product managers. Customers and engineering set the direction and make the product decisions. Our product is already evolved, but there's plenty of room to shape where it goes next.
You'll be based in our central London office, working alongside the founding team. Most of us are in most of the week. We value proximity for the speed it brings to decision-making and collaboration.
The profile
You are an ex-founder or an engineer who moves fast and thrives in ambiguity. You've built things from scratch and know what it takes to ship.
You're commercially minded, technically curious and comfortable making decisions without waiting for permission. You simplify complex systems. We're dealing with financial modelling, data pipelines and ML, so you enjoy untangling gnarly problems and making them feel simple.
What you'll bring
- Experience building products end-to-end, from problem discovery through to production
- Strong TypeScript and React. You're comfortable across the full stack
- You've shipped software that real users depend on, in a startup or high-growth environment
- You can hold your own in a customer conversation and translate what you hear into what you build
- Familiarity with our stack or something similar: Next.js, Node.js, Postgres, Redis, BigQuery, Python
Don't tick every box? Apply anyway. If you're close and the problem excites you, we want to hear from you.
Bonus points
- Systems of record, financial products or FP&A tools
- Integrations with HRIS, ATS or project management platforms
- LLMs (Claude, Gemini) in production
- Fine-tuning, evals or building on modern AI stacks
- Go, Swift or .NET. They're part of our stack, not day-one requirements
- Security fundamentals: OWASP, OAuth, SAML
Stack
Open-source-first. Common, portable tools before cloud-native services.
Benefits
- Meaningful early-stage equity
- Salary that reflects your value and removes life stress
- Employer pension contribution
- 25 days holiday + bank holidays
- Private health insurance
- Cycle to work scheme
- Free breakfast and subsidised gym membership
- Claude Code with unlimited budget
- New MacBook Pro and any tooling you need
About Flowstate
Flowstate is the Workforce Engineering platform. We help organisations measure, optimise and recover the full value of their workforce, human and AI. Every cost attributed to teams, projects and outcomes in real time. Every decision faster.
We're backed by a16z Scout Fund, Ventures Together, Haatch and Openseed. We're a small team of ex-founders who believe the way companies plan and measure the cost of work is about to change completely. We're building the system that makes it happen.
We don't do sprints or planning cycles. We figure out what needs to happen, plan it, and execute in days not months. No product managers. No layers. Everyone talks to customers. Everyone owns outcomes.
We work from our central London office. Life happens and we're flexible when it does, but we believe the best ideation and collaboration come from sharing the same walls.
What to expect
Four stages, no tricks. We've documented every step of the technical interview.
Read the process