About Invopop
Invopop helps global companies like SumUp, Fever, and DeepL issue and receive invoices across more than 25 countries through a single API.
In the next five years, more than 40 countries, including the entire EU, will mandate that businesses send invoices electronically (in XML format) and report them in real-time to tax authorities. This reduces fraud and enables companies to automate invoice processing instead of relying on OCR. There’s only one catch: each country has defined unique standards, forcing global companies to build dozens of local integrations—or integrate once with Invopop. :)
Invopop was founded by Sam Lown, co-founder and former CTO of Cabify, based on his experience dealing with this problem at Cabify.
We’ve raised €2.8M from top-tier global VC firms, including YCombinator (W23), and have been named the Best Startup at South Summit 2024 and Madrid's Hottest Startup of 2024 by Wired.
Your mission as a Staff Backend Product Engineer
With Invopop, users build workflows by chaining Actions, each action being managed by an App. An App is a standalone service focused on a single goal, such as reporting an invoice to a tax authority, synchronizing it with an external system (e.g., ERP), or transforming/enriching a document.
As a Staff Backend Product Engineer, you’ll be the owner of several Apps end-to-end, from the initial research to maintaining in production:
- Investigate new countries and systems: read regulations and technical docs, turn ambiguity into clear requirements, and consult local experts when needed.
- Design and build integrations in Go on top of our modular architecture (NATS, CQRS patterns, Kubernetes on GCP).
- Drive product decisions: define what “good” looks like, choose trade-offs, cut scope when needed, and ship.
- Support customers using your Apps and iterate based on real feedback.
- Raise the bar across the team: review PRs, mentor engineers, and influence product and technical direction (architecture, patterns, quality
Why join Invopop
- Real ownership: you research, decide, build, ship, and support your own Apps.
- Work closely with Sam Lown (founding CTO of Cabify) and a small, high-bar team.
- Hyper-growth: 15 launches planned in 2026 and a 3x growth goal.
- Full room to experiment: frameworks, databases, schemas, AI tools — nothing is sacred, as long as you can justify the choice.
- No politics: product, taste, and good ideas win.