Senior.NET/Python Developer-Architect | Energy Sector

WHO WE ARE Etinars is a values-focused company with multi-year experience, specialised in the recruitment of professionals for niche markets, managing the full life-cycle of specialist and executive-level hires. At Etinars, we genuinely care about who you are and what you need. We place great emphasis on fostering robust, enduring connections built upon trust and transparency. Our approach ensures a swift journey, leading you hand in hand towards signing your next career step. WHAT WE ARE LOOKING FOR Senior .NET/Python Developer-Architect | Real-Time Energy Systems Join our client's large international organisation active in the energy sector, contributing to real-time energy management & balancing and solutions supporting the energy transition. You will work on real-time software products that help balance the electric grid and connect physical assets (e.g., batteries, renewable parks) to forecasters and optimizers to improve optimisation results. You will join a context where software teams analyse, design, develop, maintain and support products focused on real-time services, including low-latency streaming and dispatching components. In this role, you will work 2 days per week onsite in Brussels and the rest remotely, collaborating closely with functional analysts, domain experts, and technical teams in an international environment. For this role, relocation to Brussels (Belgium) is mandatory for candidates living far from the area, or the ability to commute regularly. Languages required: English fluent due to daily interactions with teams and stakeholders. French or Dutch is a plus. YOUR TASKS As Senior Software Developer and Architect, you will: Provide technical guidance to development (team of 3–5 people). Guide discussions with functional analysts and domain experts. Design and document architectural proposals (diagrams), including APIs, services, and front-end/back-end interactions. Improve delivery practices and overall team effectiveness. You will supervise the team to ensure the following activities are delivered: Break down proposals into agile progressive development upgrades. Implement builds and associated testing and maintenance tools. Develop back-end services and APIs. Write tests in collaboration with business colleagues. Document and develop user manuals. Provide user assistance and support. Monitor systems and provide L2 support, incident resolution and troubleshooting (root causes of recurring incidents). YOUR SKILLS AND EXPERIENCE Must-have 6+ years of software engineering with technical design and architecture responsibilities. Strong capability for technical / complex analysis (components include complex technical features). Proficiency in .NET. Proficiency in Python, including async programming and performance-oriented design. Proven experience designing and operating event-driven architectures (Kafka, Azure Event Hub, or MQTT). Strong understanding of distributed systems concepts (scalability, fault tolerance, backpressure, ordering, idempotency). Hands-on experience with Kubernetes in production (deployments, autoscaling). Experience with Redis (stateful systems / caching use cases). Strong testing culture: unit tests, integration tests, production validation. Production-grade observability: metrics, logging, alerting (e.g., Grafana, Prometheus, or equivalent). Familiarity with Agile development practices. Nice-to-have / stack exposure (plus) Azure and Infrastructure as Code (e.g., Bicep). Familiarity with parts of the stack: AKS, Azure Functions, Azure Service Bus, PostgreSQL, Azure Data Explorer, GitHub Actions / CI/CD. Experience with Scala or Rust is a plus. Polytechnic engineering Master’s degree (or equivalent) is a strong plus. EXTRA INFORMATION Location: Brussels, Belgium (relocation mandatory if living far / or ability to commute regularly) Work model: Hybrid - 2 days onsite / 3 days remote Preferred start date: 02/03/2026 Contract duration: 1 year, extendable for 2 more years (max 3 years) Contract type: Freelance Languages: English fluent, French or Dutch is a plus Daily rate range: €520–€545/day (all-in; depending on profile/experience, within the project budget cap) Eligibility: EU Citizens, or Non-EU citizens already based in the EU with a valid work permit Once we receive your CV, we will take the time to evaluate it carefully. Should there be a match for this or any other position at Etinars, we will be in touch. Etinars is committed to supporting a Diverse and Inclusive Community. If you meet the minimum criteria for the job, you will be given the opportunity to demonstrate your abilities at an interview.