George Sindilar

Event-driven Azure integration platform (~30 Function Apps, hundreds of Logic Apps, Service Bus, API Management as the single gateway) connecting ERP, PIM and the central data hub with internal consumers and external partners, on-premises services included. Built the two-way PIM sync and the EDI export end-to-end, ran APIM with one Entra ID app registration per consumer, moved deployments to Azure DevOps pipelines with ARM templates. Decision point on Azure alongside the architect.

Sole backend owner of a B2B product configurator and pricing engine for international distributors, streaming validated orders into the corporate ERP. REST API from scratch on .NET Azure Functions, EF Core and Azure SQL, deployed across Dev, Training and Production. Custom middleware for JWT validation with Microsoft Entra ID and Microsoft Graph behind a two-layer RBAC. Service Bus queues, CSV exchange with the ERP, SharePoint master data with an SQL draft copy.

Integration layer between the firm's internal business systems (leads, orders, clients), replacing a slow, error-prone manual data replication process. Event-driven architecture on Logic Apps and Service Bus, Function Apps where transformation needed code, dead-letter handling with reprocessing, secrets in Key Vault, Redis caching, Application Insights and Log Analytics. Co-built the Terraform codebase that provisioned nearly every Azure service behind the integration layer.

Technical lead on a roofing industry platform. Gathered requirements directly with the client's stakeholders, ran demos and turned them into the technical decisions the team built against. Built the missing accounting module: invoicing, in-app payments through Heartland Payment System, transaction management. Removed the performance bottlenecks limiting the number of users across the API and the backend. C# .NET, Entity Framework, SQL Server, WCF, Windows Services.

Rebuilt an unmaintainable legacy car auction platform from the ground up on .NET, WPF and Azure (Function Apps, Service Bus, API Management, App Services), accelerating feature delivery and cutting ongoing maintenance effort. C# .NET, Entity Framework, SQL Server, ASP.NET Web API, REST API, Azure DevOps.

Full-stack work on the booking platform of a US accommodation provider, serving their own site and third-party partner sites. Doubled new client acquisition in the first year by re-architecting the core application to resolve performance bottlenecks and building an embeddable booking widget for third-party integration. C# .NET, Entity Framework, SQL Server, ASP.NET Web API, JavaScript, TFS, Octopus.

Grocery eCommerce platform losing clients to an aging application and slow feature delivery. Won 3 of the industry's biggest retailers as clients and brought back churned customers by rewriting the application on newer technology and building a plugin model that gave each retailer its own customizations. C# .NET, Entity Framework, ASP.NET Web API, REST API, SQL Server.