Backend Python Software Engineer | EU Institution | Brussels

Joining KEYES means giving purpose to your talent.

Are you looking for an environment where technology is not an end in itself, but a lever to build a sustainable future? At KEYES , we are not just looking for technical expertise; we are looking for people who share our values.

Do you want to continue your career and grow within one of Belgium’s leading IT companies?

Join KEYES as a Backend Software Engineer

We support large enterprises, the public sector, healthcare organizations, and SMEs in all their digital challenges: Infrastructure & Cloud Solutions, Cybersecurity Solutions, Business Software Solutions, Mainframe Solutions, Data & AI Solutions, Advisory Solutions, and Staffing Solutions.

More information:

THE BACKGROUND

For our client, an EU Institution based in Brussels, we are looking for a Backend Software Engineer (Python) to join a long-term mission within an international team delivering modern digital services and business-critical applications.

You will contribute to the development, maintenance, and enhancement of backend services and APIs, ensuring secure, scalable, and high-performing applications that support key business processes.

Please note : candidates must be located within (2) two hours of Brussels, as regular onsite presence is required throughout the assignment.

YOUR MISSION

As a Backend Software Engineer , your responsibilities will be as follows:

• Architect server-side components and services that form the backbone of web applications, employing best practices in Python programming.
• Develop and maintain RESTful APIs to facilitate seamless communication between front-end and back-end systems.
• Design, implement, and optimise database schemas and queries to ensure efficient data storage and retrieval processes.
• Manage database security measures to protect sensitive information, ensuring compliance with data protection standards.
• Enhance application performance by identifying bottlenecks and optimising server-side code and database queries.
• Implement scalable architectures to handle increased user load and data volume, leveraging cloud services and containerisation.
• Conduct regular code reviews and use vulnerability scanning tools to identify and address potential security issues.
• Implement security protocols and standards to safeguard applications against threats and ensure data privacy.
• Collaborate closely with front-end developers, UI/UX designers, product managers, and other stakeholders to deliver quality web application solutions.
• Help translate business requirements into technical specifications and adjust implementations based on feedback.
• Set up and maintain CI/CD pipelines to automate testing and deployments, ensuring consistent and rapid delivery of applications.
• Participate in deploying applications in cloud environments, using infrastructure-as-code and configuration management tools.
• Actively engage in debugging and resolving issues raised during testing or reported in production.
• Write technical documentation #LI- MS1 #TRASYS

YOUR PROFILE

• Bachelor's degree with at least 7 years of relevant professional experience, OR
• Master's degree with at least 5 years of relevant professional experience with focus on Computer Science
• Ability to understand, speak, and write English (minimum B2 level)

Technical knowledge REQUIRED

• Proficiency in Python and experience with web frameworks such as Django, Flask, or FastAPI.
• Experience with code linters and formatters (e.g., pylint, black, flake8) to enforce coding standards.
• Experience with AI-powered code assistants (e.g., Amazon Kiro, Github Copilot), staying updated with advancements in AI-driven code technologies that can streamline Python web application development.
• Strong understanding of RESTful design and implementation.
• Solid experience with relational (e.g., Oracle, PostgreSQL) and non-relational databases (e.g., Elasticsearch, MongoDB).
• Excellent knowledge of ORM, schema design, efficient queries.
• Expertise in containerisation tools like Docker, Podman and orchestration using Kubernetes.
• Knowledge of vulnerability scanning tools (e.g., OWASP), secure coding practices and standards, including authentication, authorisation and encryption.
• Knowledge of code versioning tools such as Git or SVN.
• Knowledge of DevSecOps tools such as Jenkins, GitLab CI, GitHub Actions (Continuous Integration/Deployment).
• Familiarity with configuration management tools like Ansible.
• Experience with VM management, Linux.
• Good knowledge of European Commission grant