WSO2 IAM Developer

Location: Amsterdam, Netherlands

Hours: 36 hours per week

Scale: 10

Practical Information

Experience level: Senior (5+ years in IAM/WSO2 required)

Educational background: no specific requirement

Industry background: energy experience is not required — candidates from other industries are welcome

Interview process:

First interview with Manager

Second interview with Product Owner and a team member

Availability: not open for freelancers (ZZP), only via secondment/contracting

We kindly, yet firmly, request that you do not contact us regarding tariff rates. All proposals must be submitted in line with market standards.
Your questions about or related to specific rates will not be answered.

CV language: English preferred

Office presence: Tuesdays, Wednesdays, and/or Thursdays in Amsterdam

About Vattenfall

Vattenfall is a European energy company with approximately 20,000 employees. For more than 100 years, we have been supplying energy to households and industries, modernizing society through innovation and cooperation.

Our ambition: to enable fossil-free living within one generation.

To achieve this, we are looking for talented specialists who combine technical expertise with strong team spirit. Within our digital products and services, Identity & Access Management (IAM) plays a key role in providing secure, reliable, and customer-friendly solutions.

Your Role

As a WSO2 IAM Developer within the Customer Recognition & Digital Identity (CRD) team, you will work at the core of our IAM landscape: the WSO2 Identity Server. You will help millions of customers access Vattenfall’s products and services securely and seamlessly — such as EV charging, solar panels, and home energy management.

Your contributions will include:

Designing and extending authentication methods

Implementing trust levels, role-based access, and session management

Integrating WSO2 IAM with front-end applications (App & Web), .NET back-end services, and SAP systems

Running experiments (e.g., A/B testing) to optimize login flows and user experience

Ensuring compliance with security and accessibility standards

Key Responsibilities

Develop, configure, and extend WSO2 Identity Server (authentication flows, service providers, identity federation, adaptive authentication)

Build and optimize API-driven integrations between WSO2, .NET microservices, SAP, and Azure services

Support Product Owners, UX specialists, and Security experts in refining customer identity and access journeys

Implement secure and user-friendly IAM flows (MFA, self-service account management, delegated access)

Automate CI/CD pipelines in Azure DevOps (YAML)

Proactively monitor and improve the performance, security, and compliance of IAM services

Requirements
Must-haves

Strong experience with WSO2 Identity Server (configuration, customization, extensions)

In-depth knowledge of OIDC, OAuth2, SAML, SCIM

Proficiency in Java (for WSO2 custom extensions) and API integration with .NET/REST services

Familiarity with Microsoft Azure services (Web Apps, API Management, Container Apps, Cosmos DB)

Solid understanding of IAM security practices (MFA, adaptive authentication, delegated authorization, session security)

Nice-to-haves

Experience with Angular or .NET to support end-to-end IAM integration

Team & Culture

Team of 8 people: Frontend Developer, Fullstack Developer, Product Owner, Tester, UX Designer

Team culture: hands-on, innovative, informal, and result-oriented