Staff Backend Product Engineer

Invopop (YC W23)

Staff Backend Product Engineer owning integrations end-to-end at a global e-invoicing platform. Working with backend systems, mentoring, and collaborating with teams in Madrid.

Posted 4/12/2026full-timeMadrid • 🇪🇸 SpainLead💰 €90,000 - €140,000 per yearWebsite

Tech Stack

Tools & technologies

Distributed SystemsGo

About the role

Key responsibilities & impact

Own integrations end-to-end, research, define, build, ship, and iterate with customers
Investigate new countries and systems and consult local experts
Design and build integrations in Go on top of our modular architecture
Drive product decisions and support customers using your Apps
Raise the bar across the team: review PRs, mentor engineers

Requirements

What you’ll need

10+ years building backend systems (APIs, distributed systems, or complex domains)
Fluent English: it's our internal working language
Strong product judgment
Customer empathy
A track record of high-agency

Benefits

Comp & perks

Stock Options
Travel expenses paid when working from the office 3-4 days per month

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Gobackend systemsAPIsdistributed systemsmodular architecture

Soft Skills

product judgmentcustomer empathyhigh-agencymentoringteam collaboration