Leiden, Netherlands | Posted on 10/26/2026 Software Engineer Java & React | Leiden | Hybrid (3 days office, 2 from home) | up to €5,000 per month
Want to build software that is used by national libraries across Europe and Asia and do you like Java and React, and do you use AI tools in your daily development work? Then this role in Leiden could be your next step. About the organisation
Our client is an international tech company and library cooperative with its global headquarters in the United States and offices in Leiden and Eelde. From Leiden, a development team builds and maintains a metadata management platform that national libraries and regional library consortia in the Netherlands, Germany, France and Japan use to manage very large collections. The product has grown over decades into a flexible and commercially successful system. The team
You join an experienced team of 10 software engineers, 2 test engineers and a technical manager. Because the team is quite senior, there is room for someone with a little less experience who wants to grow alongside strong colleagues. What will you do?
Design, build and test new functionality and improvements to the platform Analyse and solve problems in existing systems Help translate requirements into designs and working code Take part in unit, system and acceptance testing, architecture reviews and performance testing Work on continuous integration, development environments and software releases Use AI tools as a standard part of your development work Who are we looking for?
At least 4 years of experience as a software engineer A bachelor's or master's degree in computer science or a related field, or equivalent experience Experience with Java/Spring and with React Experience with AWS (Lambda, EKS, ECS) Good knowledge of Linux and scripting Experience with PostgreSQL and Git is a plus; C is an advantage Hands‑on use of AI tools in your daily work Good English; Dutch is not required A team player who enjoys working in an agile, international environment What’s on offer?
A salary of up to €5,000 gross per month, depending on experience, plus an end‑of‑year bonus 26 vacation days, with the option to buy or sell 6 more A good pension plan and group discount on health insurance Hybrid working: 3 days at the Leiden office, 2 days from home, with commuting, home‑office and internet allowances Flexible working hours, a bike plan, company fitness and room for learning and development Full‑time; part‑time is negotiable
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Software Engineer Java & React in Leiden (hybrid) werkgever: HUMAN CAPiTAL
Als KAM-Coördinator bij onze groeiende organisatie in de grond-, weg- en waterbouw krijg je de kans om te werken aan technisch uitdagende projecten met een zichtbare impact in de regio. Wij bieden een hecht team met korte lijnen, volop opleidingsmogelijkheden en aantrekkelijke secundaire arbeidsvoorwaarden zoals pensioen, reiskostenvergoeding en een laptop. Bij ons staat samenwerking, eigenaarschap en persoonlijke ontwikkeling centraal, waardoor je kunt groeien in je rol en bijdragen aan duurzame initiatieven.
