Senior Back End Developer
€60,000 - €90,000 per year
Key Skills
Job Description
Elockers runs the smart-locker platform that festivals, venues, and events across six countries rely on for real-time payments and marketplace-style payouts, including on-sale moments where a large share of a site's lockers can sell out within a minute. We're live in eleven countries, with further international expansion underway. Our platform is genuinely strong: microservices architecture (~30 services), event-driven data flow, and a payments stack built for a real marketplace. This isn't a role about fixing something broken. It's about strengthening a platform that already works well, hands-on. The Role We're looking for an exceptionally strong, hands-on Senior Back-end Developer to work deep in our microservices platform, where software, payments, and physical hardware come together. You'll match our current technical level and raise it through your own hands-on work. This is a pure individual-contributor role: you'll design, build, and debug complex systems yourself, with real technical depth, not people management. What you'll work on • Our microservices platform, with Node.js and modern architecture patterns at the core • Cloud-native engineering on DigitalOcean App Platform: deployment, scaling, monitoring, and production reliability • Reliability at peak: real-time payments and traffic spikes during live events, with zero tolerance for downtime • Our Adyen-based payments and marketplace systems, and how our software connects to physical locks and hardware • Engineering discipline: CI/CD, documentation, and AI-assisted development, as we raise an already-strong platform further What you'll bring • Deep, hands-on technical seniority. You independently design, build, and debug complex distributed systems • Strong, current Node.js and microservices expertise, a core requirement • Real soft skills and team fit. A clear communicator who works well in a small, fast-moving team • Genuine ownership mentality. You step up when something business-critical is on the line • Cloud/platform engineering experience, ideally DigitalOcean App Platform • Payments or marketplace experience (Adyen, PSPs, split payments, KYC) and comfort with high-peak, mission-critical systems • IoT/hardware integration experience is a genuine plus, our software talks to physical lockers • Nice to have: React Native/Expo experience, multi-country scaling with GDPR awareness, background in events or ticketing Our stack today Microservices (~30 services), moving toward Node.js at the core. Adyen for payments. Kafka, ClickHouse, Metabase for data. React Native/Expo for mobile. DigitalOcean, Sentry, New Relic, Jira for infra and tooling. What we offer • A gross annual salary of €60,000-€90,000, depending on experience • Real technical depth, working on a platform where software, payments, and hardware genuinely come together Sound like you? The most efficient way to apply is to apply here or on our website. For questions feel free to contact Brendan @ 0615348554 or [email protected]
Core Responsibilities
Design, build, and debug complex systems across the microservices platform, with a focus on Node.js, cloud-native operations, and reliability during high-traffic live events. Strengthen payment and marketplace systems, hardware integrations, and engineering practices including CI/CD, documentation, and AI-assisted development.
Requirements
Candidates need strong, current Node.js and microservices expertise, hands-on experience designing and debugging complex distributed systems, and clear communication skills suited to a small, fast-moving team. Cloud/platform engineering and payments experience are valued; IoT or hardware integration, React Native/Expo, multi-country scaling, GDPR awareness, and events or ticketing experience are additional advantages.
About elockers
Industry: Events Services
Company size: 11-50 employees
elockers has years of experience and knowledge from the festival and events industry. We have developed the ultimate lock, which we have built in our own factory. As a result, we offer the most flexible, vandal-proof and, above all, most transparent locker solution in the world. elockers is the only one in the market that makes it possible for visitors to store their belongings quickly and safely. Completely cashless, staffless, wireless, keyless and qless. 1. Sell lockers via elockers.online. With our platform it is possible to sell 90% of your lockers in advance! Therefore, let the entire sale take place via elockers.online in your own corporate identity. Visitors can buy a locker code online in 22 seconds and share it with friends via WhatsApp with just a tap. 2. Sell lockers through your own ticket provider. Would you rather handle your sales through your own ticket provider? Using the elockers API you can determine your own cut or point and visitors will receive their locker number + code via email and/or text message. After the cut of point, we - the only one in the world - can resell the locker sales for the entire event via our platform elockers.online 3. Selling lockers via a ticket box on location. All sales via the ticket box are made with PIN/cash. Lockers are only registered and printed upon payment. This makes it durable and waterproof. And event promotion is possible on the printed locker vouchers 4. Let your visitor buy a locker themselves at a kiosk. The visitor chooses a large or small locker and pays by pin/cash, after which the locker voucher is printed. To top it all off: All results are immediately visible in our dashboard! Therefore, sell lockers at various locations with dynamic pricing and have immediate insight into the turnover generated, average expenditure, the number of lockers sold and much more!