Junior Software Engineer

Junior Software Engineer - Energy

We are looking for a Junior Software Engineer - Energy to join our Energy department based in Louvain-la-Neuve.

N-SIDE is a world leader in increasing the efficiency of life sciences and energy industries by providing software and services that optimise the use of natural resources, facilitating the transition to a more sustainable world.

To achieve this, N-SIDE leverages its deep industry knowledge, technical expertise, and understanding of applied mathematics to help global pharmaceutical and energy companies anticipate, adapt, and optimise their decisions.

In Energy, we accelerate the transition towards renewables and electrification by enabling leading grids and market players in making better, faster and safer decisions.

As a Junior Software Engineer - Energy, you will help the company be the top reference in Advanced Analytics Solutions for energy markets & power systems. You will contribute in particular to the development, maintenance and operation of our solutions in grid operation such as outage planning optimisation.

What You’ll Do

• Together with the N-SIDE team, you will develop, deliver and maintain software solutions for our clients (code base related to the Energy domain, such as our innovative grid outage planning platform):
  • Collaborate with the product owners, analysts and tech lead to gather and analyse requirements, and design software solutions that meet business needs.
  • Lead some backend developments. Implement new features and do the maintenance of a Spring Boot backend codebase (Web MVC, JPA, Security,,...), including, among others algorithm, servers, APIs (Rest API, …) and databases.
  • Contribute and learn on our optimisation techniques in grid operations.
  • Participate in containerisation (Docker), container orchestration (Kubernetes, Helm charts, Argo, …), continuous integration & continuous deployment aspects. You will also improve the usage of the monitoring and logging solutions such as Prometheus, Grafana, ELK stack (Elasticsearch, Logstash, Kibana) for our products.
  • Ensure the high‑availability, scalability, robustness and high performance of our Energy applications.
• As a Software Engineer, you will also participate in the technical growth of the product and team. You will therefore:
  • Stay up-to-date with emerging technologies, industry trends, and best practices in software development.
  • By providing qualitative code reviews and participating in technical choices around our product, you will ensure that the team develops an efficient, reusable, and reliable code, and that they adhere to coding standards, best practices, and company guidelines.
• You will participate in ensuring the successful operation of our Energy applications:
  • Oversee logs, alerts, and performance of our SaaS solutions, with promptly reacting to any issues that arise. Be responsible for identifying and implementing long‑term enhancements to optimise performance and efficiency.
  • Support our clients on their daily usage of our Energy applications. You will respond to incoming user requests and provide prompt, efficient, and courteous support via the helpdesk (ticketing system and/or phone call). You will iterate with the users to clarify their requests and work on the resolution of the technical incidents. This task will constitute a minor portion of your responsibilities, yet may occasionally (1 weekend every 5 weeks) require completion outside of regular business hours (with additional compensation and/or benefits provided).

About You

• You have a master in Computer Science, Software Development, or Mathematical Engineering; or a bachelor.
• You have solid programming skills. Proficiency in Java and Python is a must.
• You are interested in software design and wish to contribute and evolve in that career path.
• You have some knowledge/interests around mathematical optimisation such as MIP, constraint programming, …
• You demonstrate excellent problem‑solving abilities. You are able to break down complex problems into manageable components and devise efficient solutions.
• You have a continuous learning mindset. The tech stack is constantly evolving, so a willingness to continuously learn and adapt to new technologies, tools, and best practices is essential for long‑term success.
• You have a great team spirit, creativity, sense of initiative and responsibility. You are willing to share your knowledge and, depending on your seniority level, to mentor junior profiles.
• Leveraging agentic coding for rapid prototyping and proof‑of‑concepts has no secret for you;
• You are also able to take AI integration to a higher level: everything we build will leverage AI directly or be architected as AI‑native (e.g., agent or