Senior Integration Engineer

Senior Integration Engineer: How would you connect systems when a standard integration is not enough?

At Semmtech, you will design, build and deploy integrations that clients use in practice. You will work directly with clients and experienced solution architects, helping determine the technical approach and taking solutions from concept to production.

Your work will combine Python, APIs, semantic data pipelines and graph infrastructure to connect applications, databases and front-end systems.

Hoofddorp + at client sites across the Netherlands
Full-time (40 hours) or parttime (32–36 hours)Hybrid working, 1–2 days remote per week.

The role

You will work alongside experienced senior solution architects, bringing your own integration expertise to the team. You will visit clients, clarify their requirements and translate complex problems into solutions you design, build and deploy yourself.

Some of what you build is tailor-made for a single client. Other solutions evolve into reusable products used across multiple organisations. Together with a product owner or innovation lead, you define the approach and make decisions on technology and architecture.

You take ideas from initial concept through to production-ready solutions that are used in practice.

Why this role stands out

• You will take solutions into production and see how clients use them.
• You will help shape the technical approach, rather than work only from a predefined specification.
• You will work across different technologies and client environments, choosing the approach that fits the problem.

What you will do

• Analyse processes and information flows to design integration solutions.
• Build integrations, APIs and semantic data pipelines that connect applications, databases and front-end systems.
• Transform pipeline output into the required data schemas and make it available to other systems.
• Configure endpoints and authentication, and optimise query performance.
• Contribute to technical architecture decisions alongside solution architects and engineers.
• Work with clients’ IT and development teams to integrate solutions with enterprise systems.
• Document your solutions and coach colleagues so that integration knowledge is shared across the team.
• Identify gaps in existing solutions and propose improvements.

You in this role

You have a background in software engineering, data science or cloud solutions. You are comfortable working on problems that aren’t fully defined and you take ownership of your approach – from design to deployment.

What you bring

• 4+ years of experience in software engineering, data science and data engineering or cloud solutions.
• Experience with platform integration.
• Strong Python skills.
• Experience taking solutions from design into production.
• Experience across different technologies and platforms, rather than working exclusively within one technology stack.
• A structured approach to integration problems and the ability to explain technical choices and trade-offs.
• You work independently and are comfortable with open-ended problems.

A plus

• Experience with Docker and Cloud deployments (AWS or Azure).
• Familiarity with RDF data pipelines and SPARQL-based data access patterns.
• Affinity with semantic models.
• Experience with MS Fabric and other data integration technologies.

You do not need prior experience with knowledge graphs, GraphRAG or RDF. You will learn this here. What you bring is the technical foundation and the ability to pick up unfamiliar territory quickly.

Growth path and career progression

We support continuous learning and offer clear opportunities to grow within the organization:

• Senior Integration Engineer: As you gain experience with complex data pipelines, semantic models, and architectural patterns, you can advance into a senior role. In this position, you will lead solution design, mentor junior team members, and take full ownership of client-facing integrations.

OR

• Transition to Platform Engineer: Yes, moving into platform engineering is a very natural progression. Because you will be working closely with APIs, cloud infrastructure (AWS/Azure), containerization (Docker), and automated deployment pipelines, expanding into platform engineering allows you to focus deeply on underlying infrastructure, platform reliability, and developer tooling.

What we offer

• Salary between € 54,000 and € 70,000 gross p/y (full-time, 40 hours, including 8% holiday allowance). Where you land in that range depends on your experience and what you have independently built and deployed.
• Performance bonus and, depending on results, a profit sharing bonus.
• 28 holidays.
• Laptop (Windows or Mac) and mobile phone.
• Mobility options to suit the way you work – lease car, NS business card or monthly mobility allowance.
• Budget for learning and development.
• Friday is often a shared office day for collaboration and knowledge sharing.
• Work on projects in energy, infrastructure and water.

About us

Semmtech has grown from a start-up to a scale-up with around 50 colleagues.

We work with short communication lines and clear responsibilities.

Our clients operate in environments where information needs to be accurate, because mistakes have direct consequences. We help them structure and use their information so it works for both people and systems.

You work with colleagues who are technically strong and enjoy building solutions together.