Ulysse Tassidis

Led the Medical team (4-5 developers) on secure healthcare messaging (MSSanté v2) within Weda's EHR used by ~15,000 physicians. Joined during production instability and restored structure, delivery capacity, and reliability.

• Crisis stabilization: Took over post-critical release with 40k+ Sentry errors, led root-cause analysis, hotfix strategy, and progressive quality improvements
• Migration & delivery: Piloted MSSanté v1→v2 migration (API LPS, data migration, SQL linked-server removal) and delivered secretary delegation feature across incremental releases
• Technical evolution: Contributed to gradual modernization from legacy .NET Framework to .NET 8 APIs while maintaining backward compatibility and system stability
• Team & process: Established engineering standards (poker planning, INVEST stories, 2-reviewer PR policy, pre-grooming with POs) and provided technical mentorship through regular 1-to-1s and pair programming. Led recruitment process for new developers (job description, technical interviews)
• Release ownership: Managed production releases, coordinated with Ops/DBA, monitored via Sentry/Graylog/Dynatrace
• Strategic contribution: Led Ségur v2 macro-estimation (465 MD) and CDA compliance work with domain experts
• Technologies: .NET Framework/.NET 8, Angular, SQL Server, Azure DevOps, Docker, Kubernetes, RabbitMQ, Redis, Sentry, Graylog, Dynatrace, Grafana/Prometheus

Led a team of five developers to build full-stack applications within a microservices architecture, focusing on network performance and large-scale data challenges. Aggregated data from France's 2G, 3G, 4G, and 5G networks to calculate KPIs and provide visualizations and alerting tools.

• Applied software craftsmanship principles (clean code, TDD) to ensure high-quality delivery
• Collaborated with product owners and stakeholders to define requirements and deliver features
• Technologies: .NET 6/8, Dapper, SQL Server, Angular 15, GitLab, Kubernetes, Grafana (Loki)

Led mobile app development projects using Xamarin.Forms for iOS, Android and Windows platforms.

• Managed App Store / Azure Cloud deployments, Azure DevOps (CI/CD), code reviews and onboarding processes
• Participated in solution design and business analysis with clients/end users to define use cases, architecture, deployment strategy, and estimations

Developed web and mobile applications using C# and Java technologies.

• Developed applications using C# (.NET Core, Xamarin), Angular, Java (Spring, Hibernate) and MySQL
• Used GitHub, Jira and Azure DevOps CI/CD tools for version control, issue tracking and continuous integration/delivery

Built cross-platform mobile applications and web applications.

• Built cross-platform mobile applications using Xamarin and web applications using ASP.NET
• Set up CI/CD pipelines in Azure DevOps and used MVVM patterns to unit test UI components

Taught English and fundraising in a school built by the association.

• Taught English to children from 8 to 16 years old
• Raised funds for the school and students

3-year dual apprenticeship within BNP Paribas, progressing through three roles across IT development, business analysis, and project management.

• FIRST YEAR — JAVA Full Stack Developer: Built web applications using Spring MVC, Hibernate, Thymeleaf. Applied Agile Scrum with CI tools (GIT, Jenkins, Maven, Nexus). User story evaluation, use case design, test automation, bug fixing and maintenance
• SECOND YEAR — Business Analyst, Operational Risks IS Redesign: Created, updated, and challenged the backlog, user stories, and MVP. Planned and facilitated users' workshops. Defined business processes and mockups
• THIRD YEAR — Project Manager Assistant: Steering, monitoring, and coordination of a web application project. Estimated budget, risks, and planning

Participated in analysis, specification writing, and application development.

• Participated in analysis and drafting of needs
• Wrote technical specification details
• Designed and developed applications using Symfony Framework

Organized departure and return of children from vacations.

• Organized departure and return of children from vacations