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Vattenfall AB

Back End Developer

Vattenfall AB

Locatie:
Amsterdam, Noord-Holland
Startdatum:
30 april 2026
Uren p/w:
36 uur p/w
Looptijd:
9 maanden
Type:
Interlancing / detachering
Vakgebied:
ICT
Sluitingsdatum:
4 mei 2026

Omschrijving opdracht

LET OP: GEEN ZZP | SCHAAL 10

The Back-End Developer establishes the web development activities that are done at the back end of programs. The Back-End Developer covers server-side web application logic and integration and activities, like writing APIs, creating libraries, and working with system components instead of frontend development, which focuses on customer-facing services and programs. The Back-End Developer focuses on the design effective and efficient solutions by analysing the website’s performance demands and goals; Development and administration of Application Programming Interfaces (APIs); Develops data acceptance and storage solutions for websites; Write, test, and maintain development solutions for code-related problems; Identifies new features with developers, designers, and system administrators; Creates a website architecture by utilizing correct product lifecycle approaches, such as Agile Scrum and frameworks; Organizes the system logic; Provide remedies to difficulties with the system; Debugs and troubleshoots apps.

Role Overview

As a Senior Backend Developer in the Omega team, you will design and deliver scalable, production-ready backend solutions that enable customers to monitor their energy usage. Using .NET and Azure, you’ll build cloud-native systems that drive innovation and business impact. You’ll collaborate closely with developers and stakeholders, contributing across the stack with a hands-on, pragmatic approach.

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 (performance, scalability, cost, 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

You’ll also contribute to architectural decisions, balancing business needs with technical excellence, and ensuring solutions are secure, scalable, and future-proof.

Skills:

About You

  • 7+ years of backend development experience
  • Strong expertise in .NET Core and C#
  • Hands-on experience with Azure (e.g., Functions, Service Bus, Event Grid, Key Vault, App Insights, Container Apps)
  • Experience with event-driven architectures and messaging systems (e.g., Kafka)
  • Familiar with Infrastructure as Code, CI/CD pipelines, and containers (Docker/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
  • Commitment to building impactful, future-oriented solutions

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

Practical information

  • Office presence (Amsterdam) is needed on 1 or 2 days per week. This is often on Wednesday but can be discussed within the team.
  • CV’s can be submitted in Dutch and English.
  • Dutch speaking is required for this position.

Functie-eisen

  • .net core 7 jaar
  • Azure 7 jaar
  • C# 7 jaar
  • Docker 7 jaar
  • KAFKA 7 jaar
  • Kubernetes 7 jaar

Sollicitatieproces

1

Reageren

  • Binnen één werkdag beoordelen we je cv en checken we of je profiel past bij de opdracht.
  • We nemen contact met je op om je sollicitatie, beschikbaarheid en motivatie door te nemen.
  • Bij een match starten we het traject, bij twijfel laten we dat snel weten.
2

Aanbieden

  • We stellen je voor aan de opdrachtgever.
  • Bij interesse volgt een gesprek of een aanvullende uitvraag.
  • Tijdens het traject houden we je op de hoogte van elke stap.
3

Aan de slag

  • Na akkoord leggen we de afspraken en vervolgstappen vast.
  • Je rondt de onboarding en bevestiging af voor de startdatum.
  • Daarna kun je aan de slag op de opdracht.

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