Backend Engineer

About usComplir is the AI platform for the product compliance lifecycle, built for retailers, brands, and manufacturers selling physical consumer products across multiple markets.We believe getting a physical product to market shouldn't mean fighting spreadsheets, PDFs, and supplier emails just to prove it's safe and legal to sell. Product compliance should be continuous, automatic, and understandable - not a bottleneck that slows launches down. We're building the AI infrastructure that makes that possible.We work with many of the worlds largest retailers and brands across fashion, furniture, cosmetics, toys, electronics and many other product categories. We're backed by Y Combinator, and a roster of investors who see what we see: Product compliance is the next major infrastructure category, and we're leading it.About the roleEvery product on every shelf in Europe has a paper trail: test reports, declarations, supplier certificates, safety documentation. That trail lives in ERP systems, PIM systems, PLM systems, supplier portals, and (more often than anyone admits) someone's inbox. Our customers ship thousands of new products a month, and their product data is scattered across all of it.Your job: Build the pipes that pull it all together. If you find deep satisfaction in making messy enterprise systems talk to each other cleanly, this is the most interesting integration problem you'll find in Copenhagen.Data gathering is the front door of our entire platform: Nothing downstream works without clean product data flowing in. You'll own the integration layer that connects Complir to our customers' ERP, PIM, and PLM systems, the difference between a customer onboarding in days versus months.This is a senior role with real architectural ownership. You'll design how our integration layer scales from a handful of bespoke connections to a product surface that can plug into any system a new customer brings. The role will grow beyond integrations into broader backend ownership as the platform expands.Where you'll be basedYou'll be at our central Copenhagen HQ, working alongside our AI engineers, our in-house product compliance experts, and the founders. We're a small team that moves fast, laughs a lot, and celebrates wins loudly - and the distance between "customer has a problem" and "fix is in production" is measured in hours, not sprints.What you'll doDesign and build integrations with customer ERP, PIM, and PLM systems (think SAP, Dynamics, inRiver, Akeneo, Centric, and the long tail of systems you've never heard of yet)Own the data ingestion pipeline: product data and documents in, normalized and reliable, at portfolio scaleTurn one-off integration work into reusable patterns: connector frameworks, mapping tools, monitoringWork directly with customers' technical teams during onboarding, then make the next onboarding easier than the lastCollaborate with our AI engineers so ingested data feeds classification, risk assessment, and document generation cleanlyHelp shape backend architecture, tooling, and engineering culture as the team growsYou will love this job, if you are:A senior backend engineer (5+ years or the scars to match) who has built integrations with enterprise systems before and didn't hate itFluent in API design, data modeling, and the unglamorous reality of other people's data (inconsistent, incomplete, occasionally in a 2007 Excel format)Pragmatic: you'd rather ship a reliable connector this week than a perfect abstraction next quarter, but you know when the abstraction pays offComfortable talking to customers' IT teams without a translatorBonus points: experience with PIM/PLM ecosystems, retail/e-commerce data, or compliance-adjacent domainsWhat you getA core architectural problem that's genuinely yours, at a Y Combinator-backed company in a market being reshaped by new EU regulationSmall, sharp team: AI engineers, product compliance experts, and founders who shipDirect influence on product and engineering cultureA central Copenhagen office, great coffee, and mandatory pastriesCompetitive salary and equity