Software Developer – Python (Hybrid, Athens)

About the role

Thales Hellas is looking for a Software Developer to join its 40‑person team in Koropi, near Athens. You will work on cutting‑edge applications for civil aviation, defence, cyber security and space markets, collaborating with both commercial and operations pillars.

Key responsibilities

• Design, develop, and maintain Python‑based applications and services.
• Implement and consume RESTful APIs using frameworks such as Flask.
• Integrate message brokers like Apache Kafka or RabbitMQ for data streaming.
• Work with NoSQL (MongoDB, OpenSearch, Elasticsearch) and SQL databases (PostgreSQL, MySQL).
• Set up CI/CD pipelines using GitLab and GitLab Actions.
• Apply security best practices to ensure robust authentication, authorization and data protection.
• Collaborate with cross‑functional teams to deliver high‑quality software solutions.

Required profile

• 2–3 years of hands‑on experience in application development with Python.
• Bachelor’s degree in Computer Science, Engineering or a related field, or equivalent practical experience.
• Strong communication and teamwork skills.

Required skills

• Python programming and object‑oriented design.
• Experience with RESTful API development (e.g., Flask).
• Knowledge of message brokers such as Apache Kafka or RabbitMQ.
• Familiarity with NoSQL databases (MongoDB, OpenSearch, Elasticsearch) and SQL databases (PostgreSQL, MySQL).
• Proficiency with GitLab, including GitLab Actions for CI/CD.
• Understanding of application security, authentication, authorization and secure coding practices.
• Basic knowledge of Machine Learning concepts, Large Language Models and data science is a plus.

What we offer

• Opportunity to work in a multinational environment on high‑impact projects.
• Hybrid work model combining on‑site collaboration with remote flexibility.
• Career development through Thales’ global mobility and training programs.