Python Back-End Software Engineer Senior

About Cronos Europa Cronos Europa is a leading IT and digital transformation partner dedicated exclusively to European Institutions and agencies, delivering mission-critical solutions that shape Europe's digital future. As part of the Cronos Group, one of the most innovative and fastest-growing tech ecosystems in Europe, we benefit from a vast pool of expertise and cutting-edge capabilities. With over 1,000 specialists across Belgium, Luxembourg, and the Netherlands, we combine deep institutional knowledge with strong engineering excellence to support long-term, high-impact EU programmes requiring reliability, scalability, and innovation. About the job We are looking for a Python Back-End Software Engineer to design, develop, secure and maintain robust server-side components supporting mission-critical web applications. The role focuses on building scalable back-end services, integrating systems through APIs, optimising databases and supporting reliable delivery in cloud-based environments. Responsibilities
• 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. Specific expertise
• EQF 6 with a focus on Computer Science.
• Proficiency in Python and experience with web frameworks such as Django, Flask or FastAPI.
• Experience with code linters and formatters such as pylint, black or flake8.
• Experience with AI-powered code assistants such as Amazon Kiro or GitHub Copilot.
• Strong understanding of RESTful design and implementation.
• Solid experience with relational databases such as Oracle or PostgreSQL and non-relational databases such as Elasticsearch or MongoDB.
• Excellent knowledge of ORM, schema design and efficient queries.
• Expertise in containerisation tools such as Docker or Podman and orchestration using Kubernetes.
• Knowledge of vulnerability scanning tools, 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 or GitHub Actions.
• Familiarity with configuration management tools such as Ansible.
• Experience with VM management and Linux.
• Good knowledge of the European Commission grant management ecosystem, including eGrants, would be an asset. Skills and competencies
• Ability to apply rigour and consistency in back-end development practices.
• Ability to work in a multicultural environment.
• Ability to participate in multilingual meetings.
• Ability to understand, speak and write English; French is considered an asset.
• Talent for building relationships and adapting communication to the audience.
• Ability to work in a team as well as autonomously.
• Results-oriented mindset focused on delivery. If you wish to integrate a dynamic structure on a human scale while working with the latest technologies, don't wait anymore and join Cronos