Senior Back-end Developer
At a glance
Senior Backend Engineering role at elockers. Amsterdam · full-time · €60,000–€90,000 base.
techroles summary, based on the employer's posting.
What you'll do
- Design, build and troubleshoot complex services across the microservices platform, with Node.js at its core
- Deploy and operate cloud services, handling scaling, monitoring and production reliability on DigitalOcean App Platform
- Keep payments and event traffic reliable during live peaks, when downtime is unacceptable
- Connect Adyen marketplace payments with the software that controls physical lockers
- Strengthen engineering practices through CI/CD, documentation and AI-assisted development
What you bring
- You bring senior hands-on depth, independently delivering and debugging complex distributed systems
- Current, strong Node.js and microservices expertise is essential for this role
- You have cloud or platform engineering experience, ideally with DigitalOcean App Platform
- You communicate clearly, take ownership when business-critical issues arise and work well in a small, fast-moving team
Who this fits
This role suits a hands-on senior developer who wants to work directly on distributed systems, payments and hardware integration. The job is based onsite in Amsterdam.
From the employer
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 and two acquisitions 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. You’ll design, build, and debug complex systems yourself, with real technical depth.
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 op our website.
If you have any questions, feel free to give us a call or e-mail. 0615348554/brendan@elockers.com
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