Company: Microsoft
• Coded C# backend and React frontend internal website for government purposes
• Improved code quality and help elevate the team in better coding practice

Company: 3C Connect SaaS CRM website for managing customers & invoices for the service call industry. HVAC, Plumbing, Electricity, Spa
• Integration specialist architecting with Azure Cloud for scalability by using Azure Functions, Event Grid, Service Bus, Redis
• Led the creative vision and strategic goals of the company, ensuring alignment with integration objectives
• Collaborated with clients and customers to discover and implement effective solutions
• Launched and managed a PWA application in React, communicating with distributed systems and Web APIs
• Managed the frontend Angular application (currently on v18)
• Developed and implemented solutions in C# to optimize system performance and reliability
• Provided guidance and mentorship to engineering hires, fostering collaboration and knowledge sharing

SaaS B2B website for managing invoices and wholesale product inventory for the food and agriculture industry
• Integrated with multiple partners to securely synchronize financial data
• Led a team on good practice principles to improve team productivity
• Prevented client churn by tracking key metrics and insights
• Coded in Go for server-side processing and React for frontend
• Solidified the code infrastructure by introducing unit tests and code coverage for the entire organization of 50 developers Testimonials:
• "Jean-Sébastien was an invaluable asset to our engineering team. Without his experience in QuickBooks, integrating would have been a very difficult process." –Magnus Hilding; VP, Silo
• "Jean-Sébastien's exceptional work for us has left a lasting impact. Not confined to a single role, he displayed remarkable adaptability as a full-stack software engineer." –Lionel Vital; Engineering Manager, Silo

• Built the entire infrastructure from scratch for a multi-tenant SaaS system using REST APIs
• Coded application using object-oriented languages C#, .NET, Angular
• Strengthened experience with relational databases, T-SQL and ORM Entity Framework
• Created, maintained high volume throughput website with 99.99% SLA with no downtime
• Implemented microservices in the cloud using Azure DevOps, Docker and Kubernetes
• Achieved idempotency in fast processing with queues and Azure Functions
• Advocated and practiced test-driven development (TDD) and solid engineering practices

• Acted as subject matter expert in .NET and Azure Teams
• Created and improved the ASP.NET MVC Framework used by more than 6 million developers
• Cross-communicated between large teams to ensure strategic and informed business decisions
• Created and launched the Azure Cloud Portal that 200 million people use every day Testimonials:
• "Jean-Sébastien is technically very strong and one of the most productive developers I have worked with. In addition to being a well-rounded developer, he was the subject matter expect for any frontend development issues." –Rajesh Batheja; Senior Software Developer, Microsoft