Python Back-End Software Engineer

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!