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Synced from Ashby · Feb 11

Staff Product Engineer

InvopopMadridPosted Feb 11, 2026
Backend EngineerHybridStaff
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Mirrored from Invopop's own Ashby careers system · refreshed hourly

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Other open Invopop roles
Feb 11
Posted
Ashby
Applicant system
Job description

TL;DR

  • We’re a global e-invoicing platform operating in 25+ countries.

  • Revenue grew 10x last year, and we plan to 3x in 2026.

  • Role: own integrations end-to-end, research, define, build, ship, and iterate with customers.

  • Looking for: 10+ years of backend experience, strong product judgment, fluent English, builder mentality, comfort with ambiguity, and complex domains.

  • Compensation: €90k–€140k base + Stock Options.

  • Location: Madrid (4-5 days/week in office).

⸻

Hi there 👋🏼,

I’m Juan, the CEO of Invopop. We help companies like Fever, DeepL, Booksy, and SumUp issue and receive invoices that comply with local requirements across 25+ countries.

We’re looking for a Staff Backend Product Engineer to join our team. If you enjoy solving hard problems with elegant software, owning your roadmap, and helping shape what we build (and how), this role could be a great fit.

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

Who we’re looking for

  • 10+ years building backend systems (APIs, distributed systems, or complex domains). Golang is a plus, but not required.

  • Fluent English: it's our internal working language.

  • Strong product judgment: you can scope, prioritize features, and make trade-offs under ambiguity.

  • Customer empathy: you’re comfortable speaking with customers and translating feedback into product decisions.

  • A track record of high-agency: you’ve led projects end-to-end, improved systems over time, and made teams faster through reviews, standards, and mentorship.

Compensation

€90k–€140k base + Stock Options, depending on seniority level.

Where you’ll work

We’re based in Madrid (Calle Guadalquivir, El Viso), 5 minutes from Nuevos Ministerios.

We genuinely enjoy working in the office, and right now the team benefits significantly from high-context, fast decision-making in person. So our default is Madrid-based.

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.

Interview process

  • Intro call (30 min)

  • Take-home exercise (optional)

  • Technical interview (1h)

  • Final interview, in person (1h)

View original posting on Ashby

What applying to Invopop usually looks like

Based on publicly available information, candidates applying through ashby for backend-engineer or software-engineer positions can typically expect a structured online application process beginning with a form submission and resume review. Ashby-based systems commonly include an initial screening stage, which may be followed by a recruiter or hiring manager conversation. Technical roles often involve a skills assessment or take-home exercise, and candidates may encounter multiple stages of interviews focused on technical knowledge, system design, and team fit, though the exact structure can vary. Communication is generally handled through automated email updates via the platform, and response times vary depending on the volume of applicants and internal scheduling. Candidates should prepare standard materials, including an updated resume and portfolio or code samples where relevant, and may be asked to complete additional forms or assessments as part of the process.

Based on publicly available information. LandEarly does not verify interview process details.

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Staff Product Engineer
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