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

Lead Dev on full-stack applications within a microservices architecture, focusing on network performance. Aggregating data from the entire 2G, 3G, 4G, and 5G network in France, we calculate KPIs and provide this data through visualizations and alerting tools. Technologies include .NET 6/8, Dapper, SQL Server for the backend, and Angular 15 for the frontend. Addressing large-scale data challenges and performance issues. Part of a Software Craftsmanship team of 5 developers, emphasizing clean code and TDD. Infrastructure tools include GitLab, Kubernetes, and Grafana (Loki)

Lead Dev in Web and Mobile Development in C#: Xamarin Mobile App, ASP.NET Core for API backend and front end in Angular: SQLite, Moq/NUnit. Tools: Github, Jira, Azure Devops CI/CD