Tech Lead, Senior Full-stack Engineer

• Lead dev on an online platform for submitting work-study contracts for public employers with the tech stack: Next.js/React.js, Node.js/Express.js, MongoDB, Nginx reverse proxy, Docker.
• We gained the trust of our client (and their clients as well) by achieving success in stabilizing and improving the application, as the rate of dematerialization jumped from 50% (2022) to 83% (2023) then 90% (2024). The client team reported that assistance tickets are no longer bug reports but users asking questions to discover the application.
• At the start of the mission, we recovered a delay of 3 months along with an evolution of 1 month in only 2 months by developing strategies to manage priorities and versions.
• After the success of the first application, I also took on the charge of another one (same client), which manages work-study contracts sent from the first application, with the tech stack: Spring Boot, Angular, Tomcat, PostgreSQL, Elasticsearch.
• Direct contact with the client and analysis of needs, mostly within 24 hours, depending on priority.
• Grow the team members through delegation, technical challenges, and encourage experimentation.
• Here are some challenges we went through as a team:
• > System maintenance and updates, including OS upgrades/migrations and version updates across Next.js, Node.js, Nginx, Angular, PostgreSQL, Java, Spring Boot, Tomcat, and Elasticsearch.
• > Enhanced performance and error handling by implementing database indexing, streamlining queries, adding early filtering, and reducing database calls—achieving a 98% improvement in response time and data size.
• > Implementation of advanced React memorization, which boosted application performance.
• > Study, impact study, refactor, and implementation of third-party APIs.
• Configure the server and help improve CI/CD pipelines using GitLab CI, Ansible playbook, Docker, Docker Compose, and Terraform.
• Improve existing processes and prepare docs such as installation manuals, local config of projects, management of DB, and management of VM.
• Implementation of version and branching strategy which allows us to manage multiple versions with ease.
• Manage priorities, costing, and estimation of version delivery on both short-term and long-term scales.
• Along with the team, we continuously share ideas with the client and push to improve the applications.
• Uphold quality expectations: reusability, SOLID principles, craftsmanship.
• Develop a reputation within SOPRA STERIA as the go-to person for React projects.
• Animation of demos on a team level (pair programming, etc.), project/client level (sharing strategies, etc.), and company level (for example: Git best practices).
• Taking responsibility and acting autonomously.