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Bac-End Developer - Sitecore XM
Context
The Belgian, German and wider European energy landscape is undergoing rapid transformation. Our client is a European transmission system operator that plays a critical role in ensuring a reliable, sustainable and secure electricity supply across multiple countries.
Working alongside other contingent workers and internal teams, you will contribute to building a future-proof, green and reliable energy infrastructure that supports economic growth while reducing environmental impact. The organization strongly values diversity and inclusion, believing that an inclusive work environment drives innovation, creativity and better results.
Service Description
The Digital Workplace – Communication domain delivers tools and platforms that enable seamless internal and external communication. This includes corporate websites and employee-facing portals used across multiple departments within the organization.
Purpose of the Role
As a Back-End Developer with a strong focus on Sitecore XM 10.2 security and stability, you will strengthen the resilience of the client’s digital platforms. Your work will ensure that websites and communication systems are secure, performant and stable, while supporting the transition toward Sitecore XM Cloud.
You will work closely with architects, DevOps engineers and IT Security teams to implement secure development practices, optimize performance and ensure compliance with internal security policies.
Key Responsibilities
Maintain and stabilize the existing Sitecore XM 10.2 platform until cutover to XM Cloud
Implement and continuously improve secure development practices for Sitecore and .NET
Perform vulnerability scanning, patching and remediation for Sitecore instances, pipelines and modules
Conduct regular code reviews with a focus on performance, scalability and security
Optimize platform performance through caching, database tuning and CDN/WAF improvements
Enhance monitoring, logging and alerting (e.g. Application Insights, Azure Monitor or similar tools)
Participate in the definition and adoption of SLA/OLA, incident and change management processes
Ensure coexistence readiness with XM Cloud, including content parity validation and cache/purge coordination
Support the feature-freeze policy on legacy XM 10.2 (security, compliance and stability fixes only unless approved)
Stay up to date with web security standards, Sitecore patches and .NET frameworks
Document all technical and security changes in line with governance and audit requirements
Support the project team currently working on the migration to Sitecore XM Cloud
Requirements
Bachelor’s or Master’s degree in Computer Science, Information Technology, or equivalent experience
Minimum 5 years of recent experience in Sitecore back-end development with a focus on security and performance
5+ years professional experience in C#/.NET back-end development
Proven experience with Sitecore XM 10.2 (installation, pipelines, configuration, patching and optimization)
Strong command of English; knowledge of Dutch and/or French is an advantage
Knowledge of Sitecore XM Cloud is a plus
Strong understanding of web application security principles (OWASP, secure headers, encryption, CSRF, XSS)
Experience with DevOps and CI/CD pipelines for Sitecore (Azure DevOps, GitHub Actions or similar)
Experience working with Sitecore XM 10.2 on-premises, including manual deployment procedures
Hands-on experience with SQL Server performance tuning and Sitecore content delivery scaling
Experience with WAF/CDN configurations in combination with on-premises Sitecore XM 10.2 (e.g. F5, Azure Front Door, Cloudflare)
Practical knowledge of application observability tools (Application Insights, Seq, Kibana or similar)
Strong collaboration skills and ability to work effectively with architects, DevOps and security teams
Excellent documentation and communication skills in English
Understanding of TOGAF 10.2 and strong document-writing capabilities
Additional Information
Work regime: Full-time
Location: Brussels
Onsite presence: 2 days per week on-site (default requirement)
Questions candidates ask before applying
This depends on the role and the client, but on average our process takes 2–4 weeks from first contact to offer. We keep you informed at every step.
We specialize in roles across the renewable energy sector, including positions in solar, wind (onshore & offshore), green hydrogen, energy storage, grid infrastructure, and sustainability. We recruit for technical, commercial, and project management roles at all levels.
There are multiple ways to apply for a position with us. If you wish to apply directly to a specific job, please visit the job listing and use the "Apply" button to submit your application. Alternatively, if you are interested in an open application or exploring potential opportunities, you can fill out our online form.
We are open to discussing various commercial arrangements depending on the volume and nature of the collaboration. Contact us for a tailored proposal.
Our fees are charged to the hiring company and are based on a percentage of the candidate's annual salary. We discuss this transparently during the intake. There are no costs for candidates.
Yes! You can submit an open application via our website. We'll keep your profile on file and reach out as soon as a suitable opportunity arises.
We conduct thorough interviews to assess both technical competencies and cultural fit. We have an extensive network in the renewable energy sector, which allows us to find both active and passive candidates.
Our process consists of several steps: (1) Intake with the client to understand the role, team, and culture, (2) Active sourcing and screening of candidates, (3) Presentation of a shortlist, (4) Interview coordination, (5) Offer and onboarding support.
We are a passionate, driven team that genuinely believes in the energy transition. We combine a personal approach with deep sector knowledge, and we're committed to making a real impact — for candidates, clients, and the planet.
We cover the full spectrum of renewables: solar PV, onshore and offshore wind, green hydrogen, energy storage, EV infrastructure, and broader sustainability roles. We work with developers, EPCs, OEMs, and utilities.
We ARE Renewables is headquartered in Rotterdam, the Netherlands — one of Europe's key hubs for the energy transition. We operate across Europe and connect renewable energy talent with leading organizations in the sector.
Yes, we recruit both permanent employees and freelance/interim professionals, depending on your project needs.
Depending on the role, we typically present the first shortlist within 1–2 weeks. For specialized or hard-to-fill positions, we set realistic timelines upfront.
We live and breathe renewable energy. Our consultants have a deep understanding of the sector — from the technical landscape to the energy transition trends shaping the industry. We don't just match CVs, we match ambitions.
You can reach out via our contact form or call us directly. We'll schedule an intake to understand your needs and immediately start the search for the right candidates.
Absolutely. We guide you through the entire process, from CV advice to interview tips and salary negotiation support.
Yes, our recruitment services are completely free for candidates. We are paid by the hiring companies, so there are no costs for you at any stage of the process.