About the role
At Sumary, we are rebuilding finance from first principles. Leading accounting firms already run their live client books on Sumary, and we are building the products that will define how finance teams across Europe work in the coming decade.
As a Senior Full-Stack Engineer, you will build, refine and ship the products bookkeepers, controllers and finance teams use every day. You will own features end to end, from the data model to the interface, and work directly with our founders, our users and the accounting firms whose work we automate. You will be based in our Copenhagen office.
What you'll do
- Design and build features end to end
- Take real ownership of our codebase, balancing robustness, security and speed
- Work with TypeScript, React and Next.js, Node.js, Postgres and Supabase, Temporal, Modal and our AI service layers
- Design and evolve our internal platform, from data pipelines to workflow engines
- Work directly with founders, users and accounting firms to shape the workflows we automate
- Drive continuous improvement, and challenge us, the product and yourself
What we're looking for
- 3 to 5 years of experience building real products end to end
- Comfort across the entire stack
- Autonomy and resourcefulness: you thrive with ownership
- The ability to think holistically about system design
- Knowledge of AI and agentic workflows
Nice to have
- Experience with infrastructure, integrations, or financial and ledger data