Fulltime vacatures in Leiden

Over de functie

Join us as a Full Stack Developer and build our Data Portal and ecosystem: the central platform where our data and AI experts manage and provision projects, data products and workspaces. You work with Python, Next.js, typescript, AWS and Databricks to create clear, compliant, reliable and user-friendly solutions that help others do their work better.

Verantwoordelijkheden

Visible work: The Data Portal is the starting point for hundreds of data and AI professionals. You make their work smoother by building and improving features in Python and Next.js, and by connecting platforms such as Databricks and Ontos. Every change you make helps our colleagues work with data faster and more easily.

Challenge: You work with a modern and varied tech stack. On the backend you use Python, SQLAlchemy and Alembic to design and migrate databases. You build and connect REST APIs with AWS services such as Lambda, Step Functions and SDKs. You integrate with Databricks (Unity Catalog, APIs, workspaces) and Ontos as our data product catalog. Your challenge is to keep all these parts working together in a stable and scalable way.

Good atmosphere: You'll be working with co-workers who are eager to seize opportunities and help each other move forward.

Flexibility: You'll work from home and at a flex spot in our bustling, state-of-the-art office in the historic Stationspostgebouw (next to Holland Spoor station).

Responsibility: You'll have a big say in your work and working hours.

Development opportunities: You'll have plenty of opportunities to take courses and grow into other positions or departments.

Wat ga je doen

In this role, you will design and develop the Data Portal: our central web application that connects all data and AI platforms and services, forming a core part of PostNL's data ecosystem. You'll focus primarily on the backend, building scalable database structures, secure APIs, and integrating systems such as AWS services, Databricks workflows, and identity management. You'll manage database migrations using Alembic and ensure processes around projects, users, and data access run smoothly.

In addition, you'll work on the frontend with Next.js, building clear and simple interfaces. We already have a design system in place, so this is not about pixel-perfect UI work - the focus remains on backend functionality and integrations. You'll integrate systems such as Ontos, handle lifecycle notifications, and support automations for our data professionals.

Wat vragen wij

You work meticulously, think logically, and enjoy making complex systems clear and scalable. You switch easily between different tech stacks and teams. You can translate architectural requirements and the needs of architects and the Platform Owner into clear, maintainable solutions. You place a high value on technical quality: you write testable code, design robust APIs, and build systems that other colleagues can confidently build upon. You combine strong full-stack skills with a platform mindset and take pride in clean database design and scalable systems.

You also recognize yourself in the following:

• You hold a bachelor's or master's degree in Computer Science, Software Engineering, or a related field.
• You have strong backend skills in Python, including database design and tooling such as Alembic or SQLAlchemy.
• You have experience with front-end development in Next.js or React.
• You have experience with AWS services such as Lambda, Step Functions, and SDK clients.
• You have experience with REST API design and system integrations and can translate this into technical implementations.

Wat bieden wij

An innovative position and work that affects literally every street in the country. PostNL wants to be the logistics e-commerce platform of the future, delivering special moments faster, smarter and better. With your mindset, you can help PostNL face its challenges head on. You can count on excellent benefits in the process.

The benefits of your position are:

• Salary between €4.589 and €6.499 gross per month at 37 hours per week. But 32 hours is possible too!
• Hybrid working is encouraged and you'll have flexible working hours. After all, your work-life balance matters to us. Employees who work from home more than two days a week get an allowance of €45 net per month.
• 8% vacation pay and 25 vacation days on a full-time contract.
• Travel allowance for commuting from 6 km each way up to a maximum of 70 km each way.
• An NS Business Card for business travel and commuting.
• A good pension plan through the PostNL pension fund.
• Engineering Laptop (Mac or Windows) and a smartphone.
• Training opportunities for personal development through Mijn Leerplein.
• Discounts on holidays, events and products.

Meer informatie

• Fancy coming in for a cup of coffee or tea first in order to find out more about the job or PostNL? You're more than welcome! Call or email the recruiter and we'll schedule an appointment right away.
• We do a background check on all applicants. As part of the check, we ask that applicants submit a certificate of good conduct. We also check references and possibly conduct a special investigation.
• Because PostNL believes in equal opportunities, candidates take an assessment designed to evaluate their competences and skills relevant to the position. We recruit our own co-workers as we try to build the PostNL of the future.
• Post from recruitment agencies will be returned to sender.