Pieter Hartzer

Designed and delivered end-to-end multi-platform applications for international clients, taking projects from technical specification through to production deployment. Managed full-lifecycle remote delivery, including cloud migrations, technical documentation, and production support.

Modernised core client applications across legacy WPF and Web Forms systems and modern .NET Core microservices, improving stability and delivery speed. Designed and deployed web APIs and Azure infrastructure, and worked with third-party vendors to integrate APIs.

Built a high-performance backend API layer in .NET Core on Azure, providing a secure integration layer over legacy SQL Server structures. Built a responsive frontend SPA using Vue 3 and TypeScript, and integrated Azure Blob Storage for optimised asset management.

Led critical technical integration efforts during a corporate acquisition, migrating systems without service disruption. Maintained flagship ASP.NET platforms and built greenfield .NET Core microservices and RESTful APIs, plus automation and data-analysis tools.

Built high-throughput .NET Core web services feeding real-time data to a high-traffic consumer mobile application. Refactored core search mechanisms using Elasticsearch, improving indexing accuracy and reducing query latency.

Built greenfield web applications for retail suppliers to manage promotional campaign vouchers. Conducted internal security reviews and developed interactive frontend prototypes using Durandal SPA.

Maintained and modernised enterprise legacy software across Delphi, C++, ASP.NET, and Angular codebases. Diagnosed and resolved critical bugs, and facilitated feature enhancements and cross-framework updates.

Led the force's first public-facing web application using ASP.NET MVC and Oracle DB, meeting government accessibility and security requirements. Worked with regional police forces to build mission-critical full-stack applications.