Backend Engineer

• Participate in the design and development of applications
• Collaborate with development and design teams to ensure application quality and efficiency
• Test and debug existing applications
• Contribute to the technical documentation of projects
• Proactively suggest improvements and stay up to date with technology developments related to the relevant tools

.NET Developer – Internship

• Design and develop the APIs and services powering web and mobile applications
• Enhance services for collecting, processing, and making available data from meters, inverters, batteries, and charging stations
• Optimize the storage and querying of high-volume time-series data through aggregations, downsampling, and high-performance queries
• Contribute to integrations with the information system, including contracts, billing, CRM, and energy supplier and distributor data flows
• Ensure the security, traceability, and reliability of delivered services
• Participate in code reviews, architectural decisions, and technical decisions within the Backend Chapter
• Improve application test coverage, CI, and observability
• Provide Level 3 support and contribute to operational reliability
• Contribute to technical documentation and team skills development
• Work across the entire service lifecycle, from functional scoping through production deployment and monitoring in real-world conditions
• Collaborate with Product and Design teams within a multidisciplinary squad

Backend Engineer, C#/.NET

• Develop and enhance applications used to test aviation systems and train future operators
• Contribute to the reliability of command-and-control systems for air operations and radar systems
• Learn to use the simulation software suite, comprising several Java HMIs and a C++ server
• Become familiar with the ASTERIX standard used to exchange information in air surveillance
• Manage the message editor integrated into the Java HMI
• Participate in developing new capabilities for the message editor
• Contribute to ergonomic improvements, including collaboration with UX/UI teams, creating HMI mock-ups, developing the selected solutions, and conducting peer reviews

INTERNSHIP – Java, C++ – Simulation, Messaging, Surveillance

• Modernize and document Python 2.x/3.x integration scripts
• Test and fix existing scripts
• Make the scripts self-contained, without external libraries
• Integrate a modern HMI that clearly displays input parameters
• Verify the absence of regressions through functional testing
• Document the use of each script in a README file in Git
• Work within the simulation team of Thales’ Land and Air Systems business

Internship, Python – Software Integration Scripts and HMI

• Analyze requested enhancements and fixes in order to propose a solution, including UI prototyping and design
• Develop and test the selected solution
• Update existing tests where necessary
• Present completed work to users
• Publish the development work for peer review and feedback
• Manage application configuration, including tagging and application builds
• Update documentation related to enhancements and fixes
• Improve and expand an internal Thales application based on QF-Test to simplify the creation of automated test specifications
• Collaborate with the simulation team and technical experts

Internship – JavaFX, Test Scenario Creation UI

• Analyze requested enhancements and fixes in order to propose a solution, including UI mockups and design
• Develop and test the selected solution and, where applicable, update existing tests
• Present completed work to users, then publish the development work so peers can review implementation practices and provide feedback
• Manage application configuration, including tagging and application builds
• Update documentation related to the requested enhancements and fixes
• Enhance and expand a Thales internal application based on QF-Test for testing complex systems through their user interfaces
• Simplify the authoring of automated test specifications using this framework
• Collaborate with experts from the simulation team

Internship – JavaFX – Test Scenario Creation UI

• Design, develop, and maintain Java applications and APIs in a Spring Boot environment
• Participate in modernizing legacy applications and design new features that meet business needs
• Develop and evolve microservices architectures
• Contribute to application deployments and operations on AWS, as well as the implementation and improvement of CI/CD pipelines
• Strengthen software quality through unit, integration, and end-to-end testing, and participate in code reviews
• Ensure compliance with Clean Code and SOLID principles and development standards
• Use and leverage SonarQube
• Contribute to reducing technical debt and continuously improving the application foundation
• Participate in analyzing and resolving production incidents and collaborate with SRE teams to improve monitoring, stability, and performance
• Work with the Tech Lead, developers, QA teams, and Product teams

Backend Developer, Java

• Work on architecture redesign, greenfield development, and modernization projects for public-sector information systems and B2B platforms
• Work as part of a team on client assignments or internal projects
• Develop with Java, Spring Boot, JPA, REST, Angular, TypeScript, and Quarkus
• Design and maintain applications in GitLab, CI/CD, Docker, and Kubernetes environments
• Contribute to technical decisions and product vision
• Help foster a craft culture through TDD, DDD, and Clean Architecture
• Mentor others, explain concepts, and help teams and ideas evolve
• Collaborate in mixed client/Zenika teams using Scrum or Kanban methodologies
• Contribute to projects such as a public healthcare portal, an energy B2B platform, or a DevEx enablement initiative

Java and Angular Consultant

• Leverage Java expertise and front-end knowledge to guide the team
• Ensure best practices are followed, including code reviews, unit and integration testing, and API security
• Use GitLab CI for continuous code integration
• Use Git for project version control
• Foster and support a technical community
• Collaborate with the Group’s technical experts on projects
• Design and develop digital solutions for clients in social protection, ecological transition, and retail

Java Developer

• Join a 7-person Backend team, working closely with the Product Manager and Frontend teams
• Contribute to the development and operation of a scalable SaaS platform in both build and run environments
• Design and develop backend services in C# / .NET 8 and .NET 10
• Design and evolve REST APIs
• Define API interface contracts, versioning, and backward compatibility
• Design and maintain event-driven microservices
• Integrate retailer and partner systems
• Work with Kafka / Azure Event Hubs
• Contribute to architectural decisions and technical design
• Model and operate PostgreSQL databases handling large data volumes
• Perform unit and integration testing, as well as code reviews
• Deploy and operate services on Azure Kubernetes Service (AKS)
• Instrument and monitor applications using Azure Application Insights
• Participate in production monitoring and incident resolution
• Monitor service performance, reliability, and availability
• Optimize queries and processing for large data volumes
• Ensure the quality and maintainability of deliverables
• Contribute to the continuous improvement of the development environment
• Help enhance the team’s practices and tools, particularly those related to AI

Backend Engineer jobs in France