Medior Software Engineer

Stuck building yet another admin panel at a consultancy? Tired of being the "junior" person who never gets to touch the interesting parts of the system? Ready to work on problems that actually require you to think?

We're building the Adyen of the labor market. Just like Adyen revolutionized payments, we're transforming how people get contracted and paid in the Netherlands. It's a genuinely complex problem space—think CAO's, temporary employment regulations, payroll rules, and constantly changing legislation—that needs smart engineers who want to learn and grow.

This isn't just another ticket factory. This is real engineering work with real impact.

Who We Are

Maqqie is one of the fastest-growing tech companies in the Netherlands. We're in scale-up mode, which means you'll get exposure to serious technical challenges while still having senior engineers around to learn from. No corporate bureaucracy, no endless approval chains—just building.

Our mission: create a digital labor market that works better for everyone. Currently, we handle contracting and payments for all employment types—from permanent employees to temporary workers and freelancers. The regulatory complexity is immense, which makes the work fascinating and forces you to level up fast.

What You'll Actually Do

As Medior Software Engineer, you'll be:

• Building real features: Design and implement services and UIs that handle the complex logic of Dutch employment law. You'll work on rule engines, compliance checks, payment flows, and integrations with external systems.
• Owning your work: Take responsibility for your components from design through deployment. You'll collaborate with Product Managers to understand requirements, but you'll drive the implementation.
• Solving complex problems: Our domain isn't simple CRUD. You'll need to understand CAO compliance, phase systems, benefit calculations, and multi-entity payroll logic. It's challenging, but that's what makes it interesting.
• Optimizing performance: Identify bottlenecks, improve efficiency, and ensure our systems can handle rapid growth. You'll learn how to build for scale, not just for features.
• Growing your skills: Work alongside senior engineers who'll help you level up. We invest in your development—both through formal training and daily code reviews, architecture discussions, and problem-solving sessions.
• Helping others grow: As you gain experience, you'll mentor junior engineers and contribute to our team culture.

You'll work in cross-functional teams with Product and Operations. We're 15 engineers across 3 teams, reporting to Luc Klaassen, our Head of Engineering. Small enough to have real impact, big enough to learn from experienced people.

The Technical Landscape

Our stack:

• Languages: Kotlin/Java, TypeScript, Vue
• Infrastructure: Google Cloud Platform, Kubernetes, Docker
• CI/CD: GitLab Pipelines, Jenkins
• Databases: PostgreSQL, MySQL
• Build tools: Gradle, Maven

We're continuously modernizing. You'll get to work on both improving existing systems and building new scalable modules. You'll learn how to make architectural trade-offs, not just write code.

What We're Looking For

Essential:

• 3+ years of software development experience with a track record of shipping quality code
• Solid technical foundation in backend development
• Experience with our stack (or similar technologies and fast learning ability)
• Strong communication skills—you can work effectively with cross-functional teams
• Problem-solving mindset—you don't just implement, you think about the right solution

What matters more:

• You want to tackle complex problems, not just easy tickets
• You're eager to learn and level up your skills
• You value autonomy and ownership over being told exactly what to do
• You're frustrated by corporate process and want to just build
• You care about the business impact of your work

Education: Typically a Bachelor's in Computer Science, Engineering, or related field—but we care more about what you can do than where you studied.

Not exactly this profile but think you'd be great here? Talk to us. We value potential and attitude over perfect résumés.

Why You'd Choose Maqqie

Real challenges: This is genuinely complex work. Employment law, regulatory compliance, multi-party transactions, edge cases everywhere. You'll learn more in a year here than in three years at a typical consultancy.

Growth trajectory: We're not hiring medior engineers to keep them medior. You'll get mentorship from senior engineers, €2,000 annual training budget, and real opportunities to take on more responsibility as you prove yourself.

Ownership: From day one, you'll own features and components. No "junior developer jail" where you only fix bugs for six months.

Impact: Your code directly affects how thousands of people get paid and contracted. You'll see the results of your work in the real world, fast.

Scale-up energy: We're past the startup chaos but still small enough that everyone knows your name. You'll have influence on technical decisions and product direction.

Team: Work with smart, pragmatic people who actually want to help you grow. We work hard, but we also laugh a lot. Team events, Viking Runs, cooking together—we're building something together.

What We Offer

Compensation:

• Gross salary: €3,000 - €4,500 per month (based on 40 hours, depending on experience)
• 8% holiday pay
• 8% pension contribution (use it how you want)
• 25 vacation days (based on 40 hours)

Development:

• €2,000 annual training budget (conferences, courses, books—your choice)
• Mentorship from senior engineers
• Real technical challenges that expand your skills
• Clear path to senior level

Work environment:

• Hybrid working (office, home, or temporarily abroad)
• Central Rotterdam location (5 min from Central Station)
• Group lunches and plenty of nearby dining options
• Laptop and necessary equipment

Culture:

• Active staff association with outings and drinks
• Flexible budget of €40/month (Alleo) for sports, wellness, investments
• Average age is 33—young and ambitious team
• Freedom from day one to do your thing

The Reality Check

We're a scale-up, which means:

• We have legacy code and technical debt (you'll learn how to deal with both)
• The domain is complex—you'll need to learn about Dutch employment law
• We're building the foundation while the train is moving
• Things move fast, priorities can shift
• You'll be challenged and sometimes outside your comfort zone

We start with a contract that includes a two-month probation period. After that, we're open to discussing longer-term arrangements based on mutual fit. We value stability and want to build a team that grows with us.

Our 2026 Mission

We've built the foundation—now we're unlocking the network effect. In 2026, we're targeting other players in the labor market ecosystem: staffing agencies, arbeidsbemiddeling, and intermediaries who need our infrastructure to operate efficiently.

Think about it: every employment agency, every staffing firm, every payroll intermediary faces the same regulatory complexity we've solved. By making our platform available to them, we create the volume and network effects needed to truly become the payment engine of the Dutch labor market.

This is how platforms scale: solve a hard problem once, then let the ecosystem amplify your impact. That's the adventure. Want to be part of it?

Note: Certificate of Good Conduct (VOG) is required within 3 months of starting.