--- title: 'Graduate Product Engineer at Invopop' canonical: 'https://feeny.ai/job/graduate-product-engineer-invopop-madrid-t75mnbpne8nt' type: 'job' last_seen: '2026-09-09' --- # Graduate Product Engineer at Invopop - **Company:** Invopop - **Location:** Madrid, Spain - **Compensation:** €45k - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-02-10 - **Last confirmed live:** 2026-09-09 - **Apply:** https://jobs.ashbyhq.com/invopop/e7c7ca4c-72ae-4a48-a905-94eeda3b7d48 ## 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, iterate with customers. No PMs or bureaucracy in between. - Looking for: new grads engineers with strong software development fundamentals, fluent English (no Spanish required), a builder mentality, and comfort with ambiguity. - Compensation: €45k base + Employee Stock Options (ESOP) - Location: Madrid (4-5 days/week in office). ⸻ Hi there 👋🏼, I’m Juan, CEO of Invopop. We help companies like Fever, DeepL, and Booksy issue and receive invoices that comply with local requirements across 25+ countries. We hire only exceptional early-career talent. If you’re looking for the fastest way to become a great engineer, or eventually start your own company, it’s hard to beat working directly with Sam Lown (founding CTO of Cabify) and Juan Moliner (ex-BCG) and a small, high-bar team where your work ships to production and direct customer interaction. This is a full-time role for someone who has completed (or is about to complete) university and can join Invopop within 1–2 months. ## ABOUT INVOPOP Invopop helps global companies like SumUp, Fever, or DeepL manage electronic invoicing in over 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 formats and report them live 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 (Spain's first tech unicorn), and Juan Moliner (ex-BCG), based on Sam’s experience dealing with this problem in ten Latin American countries with Cabify We’ve raised €2.8M from top-tier venture capital 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 GRADUATE PRODUCT ENGINEER You’ll own one or more Apps from research to production - Design and build backend integrations in Golang - Investigate new countries and systems: read docs, interpret requirements, ask questions, and turn ambiguity into a clear plan. - Make product decisions with support: what to build first, what to cut, when to ship. - Support customers using your integrations and iterate based on real feedback. ## WHO WE'RE LOOKING FOR - Degree in Computer Science or Telecommunications Engineering, or a proven track record building software outside formal education. - Evidence of exceptional ability: top of your class, standout projects, or similar - Builder mindset: side projects, open-source contributions, hackathons - Fluent English (spoken and written). It’s our working language. - You can join full-time in Madrid within the next 1-2 months ## WHERE YOU'LL WORK We’re in Madrid (Calle Guadalquivir 22, El Viso), 5 minutes from Nuevos Ministerios. We enjoy the energy and collaboration of working together in person. We expect you to default to working in-person, but trust you to find the best balance between office and remote work. ## WHY JOIN INVOPOP - Real ownership from day one: you’ll ship production work that customers rely on. - Steep learning curve: you’ll grow fast with direct feedback and high standards. - Work closely with Sam Lown (founding CTO of Cabify) and a small, senior team. - Hyper-growth: 15 launches planned in 2026 and a 3x growth goal. - High-signal culture: good product and good engineering win. ## INTERVIEW PROCESS The process has four steps: - Intro call (30 min) - Take-home exercise - Technical interview (1h) - Final interview, in person (1h) ## About Invopop ## Company Overview - **One-liner**: Invopop provides a single API for global e-invoicing and tax compliance, automating the conversion of sales data into locally compliant e-invoice formats for over 25 countries. - **Entity Type**: Private (Startup, Y Combinator W23 batch) - **Headquarters**: Madrid, Spain (with a second office in London, UK) - **Founded**: 2020 (Y Combinator profile lists 2021) - **Founders**: Sam Lown (Co-founder & CTO, previously Co-founder & CTO of Cabify) and Juan Moliner Malaxechevarría (Co-founder, previously a consultant at BCG) ## Core Business - **Primary industry/industries**: E-Invoicing, Sales Tax/VAT Compliance, Fintech, B2B SaaS - **Target customers**: B2B; global software companies, fast-growing companies, and enterprises that need to issue compliant invoices across multiple jurisdictions (e.g., SumUp, Fever, DeepL). - **Mission or purpose statement**: "Help us make invoicing great again" and "Simplify Sales Tax/VAT compliance, globally." ## Products & Services - **Invopop API**: A single API that receives sales transaction data in a simple, open-source format (GOBL) and converts it to locally compliant e-invoices. This includes syncing with tax authorities for real-time reporting (e-invoicing), generating custom-branded PDF invoices, and integrating with the company’s existing stack (ERP, billing, payments, reconciliation). - **GOBL (Global Open Business Language)**: An open-source, global invoice format that Invopop is "proudly built on," designed to standardize invoice data across different countries. ## Market Standing - **Valuation/Market Cap**: Not publicly available (private startup). - **Key Metric**: Total Funding — Not publicly disclosed beyond being a Y Combinator-backed company (Winter 2023 batch). The Y Combinator profile lists a standard SAFE note with a valuation cap range (0.10% - 1.00%). - **Notable Investors/Partners**: Y Combinator (W23 batch). The company website also lists individual angel investors including Maex Ament (Co-founder of RevenueCat), Jeff Epstein (Former CFO of Oracle), Mark Villacampa (Co-founder of Cabify), and others. - **Growth Signals**: - Trusted by global companies like SumUp, Fever, and DeepL. - Live in Colombia, Spain, Portugal, and many more countries coming soon (Mexico, Italy, Peru). - Team size is listed as 7 on Y Combinator (likely at time of batch) and 17 total employees on Built In, indicating recent growth. - The company is positioned to capitalize on a massive regulatory tailwind: over 40 countries (including all EU member states) will require real-time e-invoicing in the next 1-5 years. ## Competitive Advantages - **Single API for global compliance**: Instead of building and maintaining numerous local integrations, companies integrate once with Invopop, saving significant time and engineering resources. - **Open-source foundation (GOBL)**: By building on an open standard, they reduce vendor lock-in and foster a community around their format, making it easier for partners and customers to adopt. - **Founder-Market Fit**: Co-founder Sam Lown experienced the e-invoicing "nightmare" firsthand as CTO of Cabify during its expansion into Latin America, giving the team deep, first-hand knowledge of the problem. - **Y Combinator Backing**: Provides credibility, network, and access to a global community of startups. ## Strategic Focus - **Global Expansion**: Rapidly adding support for new countries (Mexico, Italy, Peru, etc.) to stay ahead of the regulatory curve. - **Product Development**: Building out the platform to handle more complex compliance scenarios and deeper integrations with customer stacks. - **Talent Acquisition**: Actively hiring for key roles (VP of E-invoicing Compliance, Staff Backend Engineer, Founding Solutions Engineer, Founding Marketer) to scale the team and product. ## Why Work Here - **High-Impact Problem**: Work on a critical infrastructure problem that is becoming a global necessity for any company doing cross-border business. - **Strong Founding Team**: Learn from experienced founders who have built and scaled a unicorn (Cabify). - **Culture & Values**: The company emphasizes values like "Seek Honesty" and "Build," fostering a team of "curious, kind, and ambitious builders" [invopop.com]. - **Work Model**: Hybrid (with offices in Madrid and London). The Built In profile notes "OnSite Workspace" with employees working from physical offices, but job postings also indicate a hybrid model. - **Compensation**: Y Combinator profile lists salary ranges for roles (e.g., €50K - €140K EUR) plus significant equity (0.10% - 1.00%), which is typical for an early-stage, high-growth startup. - **Engineering Culture**: Focus on backend product engineering with a modern tech stack (GOBL, API-first). The team is small (7-17 people), offering significant ownership and impact. ## Sources 1. [invopop.com](https://www.invopop.com/) 2. [invopop.com/about](https://www.invopop.com/about) 3. [invopop.com/careers](https://www.invopop.com/careers) 4. [ycombinator.com/companies/invopop](https://www.ycombinator.com/companies/invopop) 5. [builtin.com/company/invopop](https://builtin.com/company/invopop) ## Other roles at Invopop - [Sales Development Representative](https://feeny.ai/job/sales-development-representative-invopop-madrid-c75yk8nrpj9g) — Madrid, Spain - [Founding Solutions Engineer](https://feeny.ai/job/founding-solutions-engineer-invopop-madrid-0khd58s5hbzp) — Madrid, Spain - [Staff Backend Product Engineer](https://feeny.ai/job/staff-backend-product-engineer-invopop-madrid-9s4pexef99vk) — Madrid, Spain - [Backend Product Engineer](https://feeny.ai/job/backend-product-engineer-invopop-madrid-dvhsq8be0pna) — Madrid, Spain