Sébastien BILLION

• Engineered and launched a FastAPI service, seamlessly integrating it with existing microservices to enhance backend functionality. • Delivered collaborative features within a cross-functional squad, adapting to the fast-moving product environment through effective sprint planning. • Migrated monitoring systems from Datadog to Grafana, significantly improving observability dashboards and reducing alert noise. • Owned dependency management, coordinating safe upgrades across services to maintain system integrity. • Engaged in daily exploration of AI topics, including LLMs and intelligent agents, while pursuing independent learning in relevant areas.

• Developed an asynchronous REST API in Python using FastAPI, managing multiple scopes based on JWT tokens to enhance security and user access. • Migrated legacy applications from Django to FastAPI, implementing new features and improving security protocols in Python and PostgreSQL. • Engineered a microservice architecture using Kotlin within an event-driven framework based on Apache Kafka and MongoDB, facilitating efficient data processing. • Migrated ElasticSearch from version 1 to 8, adapting existing code to ensure compatibility with the e-signature application. • Deployed applications on Google Cloud Platform using Kubernetes, implementing CI/CD pipelines with GitHub Actions, CircleCI, and Travis CI to streamline development workflows.

Engineered Django, Flask, and FastAPI applications, including REST APIs and payment integrations, enhancing client service delivery. • Developed responsive Android and iOS applications, contributing to improved user engagement across platforms. • Managed database migrations and server setups, ensuring seamless deployment and maintenance in diverse client environments. • Collaborated with clients to define project scope and iterate on solutions, resulting in reliable and timely deliverables.

• Led the redesign of the platform by migrating to AWS, implementing customized solutions that enhanced stability and performance. • Engineered a REST API using Flask, significantly improving data consistency and user experience. • Utilized Google Place APIs to effectively limit duplication of places in the database, ensuring data quality. • Documented API features and functionality using OpenAPI and Swagger, facilitating better collaboration and understanding among team members. • Directed a team of developers and exte

• Engineered web applications using Python with frameworks such as Django and Flask, enhancing functionality and user experience. • Migrated databases from MySQL to PostgreSQL, improving data integrity and performance. • Configured and managed Debian server environments, ensuring optimal performance and reliability for web applications. • Delivered tailored solutions through collaborative engagement with stakeholders, aligning technical capabilities with business needs.

• Created Python scripts on Debian to synchronize GPS data with PostgreSQL databases, enhancing data accuracy and accessibility. • Developed and modified PL/SQL stored procedures to improve database management and application maintainability.