Senior Back End Engineer - Sportsbook in Châtenay-en-France, Île-de-France at Jobgether

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Back End Engineer – Sportsbook based in France.

This is a senior engineering opportunity to help build a brand-new Sportsbook platform from the ground up.
You will play a key role in shaping the backend architecture, technical foundations, and engineering practices behind a global gaming product.
The position covers the full software development lifecycle, from understanding product requirements and system design through deployment, testing, and maintenance.
You will work closely with cross-functional teams to turn ambitious product ideas into scalable and reliable technical solutions.
As a senior technical contributor, you will influence architectural decisions, improve system performance, and establish strong engineering standards.
The environment is agile, fast-moving, and highly collaborative, offering substantial ownership over the technology being built.
It is an opportunity to make a direct impact on a new Sportsbook product and help define its technical direction from day one.

• Design, develop, and maintain scalable, reliable, and efficient backend services for a new Sportsbook platform.
• Contribute to the end-to-end development lifecycle, from framing product requirements and technical design through implementation, testing, deployment, and ongoing maintenance.
• Collaborate with product, engineering, and other cross-functional stakeholders to understand business needs and translate them into clear technical specifications.
• Lead architectural discussions and make informed technology decisions that improve scalability, performance, reliability, and maintainability.
• Design and implement large-scale distributed systems capable of supporting a growing gaming platform.
• Troubleshoot, debug, and resolve complex technical issues across backend services and production environments.
• Establish and promote software engineering best practices, coding standards, testing approaches, and code-review processes.
• Contribute to CI/CD practices and deployment automation to support reliable and efficient software delivery.
• Help shape the technical roadmap and architecture of the Sportsbook as the product evolves.

• Proven experience building and launching a Sports betting application from scratch, with strong understanding of the technical requirements of Sportsbook platforms.
• 7+ years of professional software development experience, with strong expertise in Java and/or Kotlin and Spring.
• Demonstrated experience designing and implementing large-scale software systems, particularly distributed and highly scalable backend systems.
• Strong understanding of backend architecture, system design, scalability, performance, and reliability.
• Hands-on experience with AWS and cloud-based application environments.
• Experience designing and maintaining CI/CD pipelines and modern software delivery practices.
• Strong problem-solving and debugging skills, with the ability to investigate complex technical issues independently.
• Ability to lead technical discussions, influence architectural decisions, and communicate clearly with both technical and non-technical stakeholders.
• Strong collaboration skills and the ability to work effectively in an agile, cross-functional environment.
• Good command of English, equivalent to at least B2 level.

• Opportunity to build a new Sportsbook platform from the ground up and directly influence its architecture and technology.
• High level of technical ownership and visibility across a new product initiative.
• Opportunity to work on large-scale, distributed backend systems and challenging engineering problems.
• Collaborative and agile working environment with cross-functional teams.
• Ability to shape engineering standards, architectural decisions, and development practices from an early stage.
• Opportunity to contribute to an ambitious global gaming product and help shape its future.
• A role with significant scope for creativity, technical leadership, and professional impact.