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Tekst logo luidt "DE Publieke Partner" in vette letters, geflankeerd door horizontale lijnen boven en onder.

Full Stack Developer – Senior

Het logo van Vattenfall met de bedrijfsnaam in grijs, gevolgd door een cirkel die horizontaal verdeeld is in geel aan de bovenkant en blauw aan de onderkant.

Aanvraagnummer: 44178
Contractvorm: Detachering
Organisatie: Vattenfall AB
Locatie: Amsterdam - Noord-Holland
Uren per week: 32 - 36 per week
Tarief: Geen maximum
Duur van de opdracht: 5 maanden
Regio: Noord-Holland
Startdatum: 01-08-2026
Optie tot verlenging: Mogelijk, maar nog niet bekend
Sluitingsdatum: 09-07-2026 12:00

LET OP! Deze opdracht is gesloten


Pratical information

No freelance role!
36 hours per week
Office presence in Amsterdam is needed 1 or 2 days per week. This is often on Thursday but can be discussed within the team.
CVs can be submitted in Dutch.
Dutch speaking is required for this position.

Full Stack Developer - Senior

Duties:
The Full-Stack Developer is a web engineer or web developer that deals with the front-end and back-end of an application or website. The Full-Stack Developer can work with any stack—mobile, web, or native applications. The Full-Stack Developer writes both front-end and back-end code, designs user interfaces on web pages, creates databases and servers for functionality, ensures cross-platform optimization, has a high-level understanding of the organization’s systems and processes, detects errors in the front or back ends, maintains good communication with the UI/UX Developer and other team members regarding user-experience issues and design rationale, and oversees a development project from start to finish.

Key Responsibilities
Design, build, and maintain backend services using .NET on Azure
Write clean, maintainable, and well-tested code with proper documentation
Make informed technical decisions regarding performance, scalability, cost, and reliability
Implement event-driven architectures for efficient system communication
Own features end-to-end: discovery, design, development, testing, deployment, and monitoring
Share best practices in code quality, security, and performance
Collaborate with cross-functional teams to deliver complete solutions
Contribute to architectural decisions, balancing business needs with technical excellence, and ensuring solutions are secure, scalable, and future-proof.

Skills
7+ years of development experience, with a focus on back-end
Strong expertise in .NET Core and C#, knowledge of Angular or a similar framework
Hands-on experience with Azure, including Functions, Service Bus, Event Grid, Key Vault, App Insights, and Container Apps
Experience with event-driven architectures and messaging systems such as Kafka
Familiar with Infrastructure as Code, CI/CD pipelines, and containers like Docker and Kubernetes

Key Strengths
Clear and proactive communication with technical and non-technical stakeholders
Strong focus on code quality, security, and performance
Collaborative mindset with DevOps and frontend teams
Curiosity and creativity in applying new technologies such as Copilot, Cursor, and agentic AI in general
Commitment to building impactful, future-oriented solutions

Education
Work experience in the energy sector is preferred but not mandatory.