Backend Engineer We're hiring a Backend Engineer to join our team in AarhusBuild the infrastructure powering the AI revolution in ecommerceWe're looking for a backend engineer with a few years of experience who wants to grow while building systems that operate at scale. You'll work alongside experienced engineers on the core infrastructure that enables AI agents to autonomously optimize ecommerce operations for our customers.You'll work at the intersection of event-driven architecture, AI agents, and real-time data processing, contributing to systems that ingest, analyze, and act on massive amounts of ecommerce data. This is a role for someone who is curious about systems, cares about code quality, and wants to develop their craft alongside a strong technical team.Join us on our growth journeyAt Cernel, we're bringing the AI revolution to ecommerce by building the intelligent backbone behind every item sold online. We make ecommerce teams work smarter, faster, and with amplified abilities across the entire value chain - starting with what lies at the core: product data.Our infrastructure continuously monitors and acts upon large amounts of data to drive value for ecommerce shops. We ingest customer data, process it, analyze it, and use algorithms to provide and execute optimizations autonomously on webshops.As Backend Engineer, you'll report to our CTO and work closely with the broader engineering team, contributing to technical decisions and helping build the platform that enables us to scale globally.Responsibilities and daily workPlatform developmentBuild and maintain core platform services (APIs, OAuth, billing services, integration layers)Contribute to event-driven systems that handle large-scale data ingestion and processingDevelop integration and data ingestion APIs that enable seamless customer onboardingParticipate in architectural discussions and translate decisions into working codeCode qualityFollow and help refine our development guidelines and code quality standardsWrite end-to-end tests and apply testable design patternsImplement well-defined abstractions and system interaction patterns across domainsCollaborate with the team on technical best practicesFeature development and optimizationBuild features that unlock automation potential for customersOptimize performance and reliability of existing systemsSupport AI development teams with reliable infrastructure and toolingCollaborate with Product and AI teams to translate requirements into working solutionsTechnology stackWork with and contribute to our evolving tech stackStay curious about new technologies that could improve our capabilitiesBuild systems that support our AI agents' autonomous decision-makingHelp ensure infrastructure reliability and observabilityTechnologies you'll work withYou'll have the opportunity to work with cutting-edge technologies in a modern stack:Event-driven architecture for real-time data processingSQL databases for complex relationship modelingTemporal for workflow orchestrationProtobuf/gRPC and OpenAPI for API developmentGoogle Cloud Platform for infrastructureGolang and Python as primary languagesMost AI providers currently availableWho you are and requirementsYou have:3+ years of professional backend development experienceA flair for AI-driven developmentWork onsite in Aarhus (remote not accepted)Solid experience with Golang, Python or similar languagesExposure to or interest in event-driven architecturesExperience building reliable backend systemsWorking knowledge of distributed systems, databases, and API designFamiliarity with test-driven development and a desire to write high-quality codeWho we areCernel is building the next generation of ecommerce infrastructure with AI-powered agents that automate complex tasks and connect workflows across systems. We're developing an advanced agent framework that analyses data, makes decisions, and drives performance - giving ecommerce teams better results, higher conversions, and more time for creative work.We are currently a team of 24 people working from our brand new HQ at Frederiksbjerg, Aarhus. We are ambitious, caring, and collaborative. We work hard, move fast, and genuinely care about building both a great product and a great organisation.We value honesty, data-driven decisions, and ownership. Our team is collaborative and thrives on open communication. You'll have the responsibility and autonomy that comes with working in a startup, contributing to the system that enables Cernel's mission.Next steps and how to applyThe process for the role will look as follows:Apply and share information about yourselfComplete personality assessment60 minutes onsite interview w/ CTO and CEO80 minutes technical interview w/ CTOMeet the team and culture fit conversationStart date: As soon as possible