Staff Backend Software Engineer

You want to join a company that places people at the heart of its concerns? We are waiting for you at Extia!

As a consulting company specialized in IT and digital sectors, Extia has prioritized an approach that combines performance and well-being at work since its creation in 2007. This vision is shared today by more than 2,500 Extians across France and internationally, and has been recognized by the Great Place to Work® certification for 15 years!

We believe in equal opportunity and offer every candidate the chance to reveal their potential, without distinction of any kind. At Extia, it's "First who, then what" so, let's do it!

First who

Expert Problem Solver: Ability to tackle the most complex technical problems independently and diagnose root causes of complex bugs using deep knowledge of code and infrastructure. **Technical Mentor & Leader: **Over 3 years of experience in technical leadership with a passion for mentoring, coaching, and empowering other engineers through knowledge sharing. **Strategic Communicator: **Excellent communication skills with the ability to adjust style for different audiences and drive decisions involving multiple stakeholders. Collaborative Team Player: Works effectively within a team dynamic, resolves conflicts constructively, and embraces rapid change. **Continuous Improvement Champion: **Shows initiative in tackling problems pragmatically, making data-driven decisions, and advocating for best practices.

Then what

What You'll Do:

• Technical Excellence: Write clean, maintainable .NET C# code that sets the standard for the team while regularly delivering high-quality working software.
• Architecture & Strategy: Drive high-level technical decision-making, identifying trade-offs and risks while ensuring organization-wide alignment.
• System Design: Apply microservice and event-driven architectures (Kafka) to build modern, scalable applications.
• SRE & Quality: Define SRE standards for production monitoring and incident response, ensuring all critical systems are documented with technical guides.
• Operations & Infrastructure: Deploy and scale cloud applications using Docker and Kubernetes, ensuring high performance and reliability.
• Code Quality: Provide insightful, comprehensive code reviews and ensure automated regression tests are implemented for complex fixes.
• Innovation: Help provide direction and vision for technical improvements and drive change across multiple engineering teams.

What We're Looking For:

• Core Expertise: 10+ years of professional experience with .NET C# and a Bachelor’s degree in Computer Engineering or a related field.
• Architecture Knowledge: Expert knowledge of microservices patterns and event-driven architectures (2+ years with Kafka, Pulsar, or RabbitMQ).
• Data Systems: Deep experience with NoSQL databases such as ElasticSearch, Dynamo, or MongoDB, with an understanding of use-case-specific deployment.
• Modern Tooling: Strong proficiency in containerization (Docker) and orchestration (Kubernetes).
• Agile Mindset: Proven track record of working successfully in an Agile environment and quickly mastering complex, enterprise-scale codebases.
• Leadership Track Record: Demonstrated ability to lead projects, organize engineering community events, and coordinate risk mitigation across teams.