Freelancer profile translated to English.
Back to original languageAbout Timothée
Freelance consultant – Java / Kafka / Spring Boot Developer
Offers:
-Backend feature development: I design, implement, test, and deploy features in backend products. I am capable of independently writing entire complex, high-value features.
-Distributed systems: With my experience, I can design scalable and resilient architectures.
-Technical leadership: With my tech lead experience, I can take charge of a development team.
-Backend architecture audit: I review an existing architecture to evolve it according to new constraints, such as reducing costs or diagnosing and resolving consistency or performance issues at scale. (example: unblocking a kafka consumer)
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 40km), Paris (up to 40km)
Experience
- Decathlon DigitalLead DeveloperRETAIL (SMALL BUSINESS)July 2025 - Today (1 year and 1 month)Lyon, France- Technical leadership of a product team delivering sports experiences to millions of users- Maintenance of critical APIs handling billions of calls/year- Complete architectural audit and definition of the multi-team technical target- Design of high-stakes solutions (throttling on overloaded Kafka consumer) Business/technical interface to frame features and coordinate enterprise-wide deployments
- Decathlon DigitalSenior Software Engineer and Tech LeadMarch 2025 - Today (1 year and 5 months)Lyon, France• ● Led the Sport team in the Customer Growth business unit running products that enhance and scale sports experiences for millions of users worldwide. Our systems manage billions of API calls annually, connecting smart devices—such as Garmin watches—to the Decathlon ecosystem.• ● Identified key areas for improvement within existing system architecture and proposed effective solutions.• ● Designed a Kafka producer listening to a third-party high-traffic webhook.• ● Refactored two central streaming data pipelines to simplify their maintenance and reduce their cost.• ● Designed fully automated E2E tests for our Purchase streaming data pipeline.• ● Designed a solution to rate limit messages consumption on an overloaded Kafka consumer app.• ● Implemented JWT verification and payload extraction with a symmetric signing algorithm.• ● Authored comprehensive technical documentation outlining system architecture, coding conventions, and best practices.• ● Collaborated with stakeholders to delineate requirements and develop user stories for new features and enhancements.• ● Collaborated with other teams to deploy company wide features.• ● Technologies: Java, Spring Boot, WebFlux, Kafka, Kubernetes, GitHub Actions, PHP, Symfony
- Kiraah LearningBack-end development trainerNovember 2024 - March 2025 (4 months)Lyon, France• ● Coached and mentored junior developers through a rigorous training program in partnership with Kiraah Learning, a development and marketing training organisation.• ● Devized the training plan tailored to the needs of the participants.• ● Engineered teaching content including videos and practical exercises.• ● Provided one-to-one mentoring to facilitate learner development.• ● Responded to questions via email to support continuous learning.• ● Hosted masterclasses to elevate skill levels among trainees
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Education
- Diplôme d'ingénieur, Ingénierie des systèmesMines Douai2016Diplôme d'ingénieur, Ingénierie des systèmes
- Ingénierie informatiqueUniversity of the West of Scotland2016Ingénierie informatique