Szymon Sasin

Integrated into an established engineering team delivering complex mobile-focused solutions for enterprise clients inside a start-up like environment. Expanded loyalty platform capabilities across backend services (.NET using C# APIs) and user interfaces (primarily React with TypeScript and Blazor (C#)). Strengthened overall system reliability through ongoing maintenance and refactoring of existing codebases. Built production-ready functionality for secure file-sharing workflows. Elevated the internal support portal by implementing multiple quality-of-life improvements, including multi-client servicing capabilities. Delivered a remote table-management solution enabling operational teams to administer restaurant data for the company's core product. Deepened expertise in React, React Native, and Remix, increasing versatility across modern SPA frameworks. Advanced proficiency in both .NET Framework and .NET 9 environments. Added new functionality to preexisting Sitecore 8 projects. Supported other team members by helping them solve some of design issues. Actively used AI (GitHub Copliot) during the work.

Founded and scaled a lean technology services company focused on supporting non-technical businesses with end-to-end digital solutions. Led discovery and requirements analysis, translating business needs into clear technical roadmaps and actionable delivery plans. Established strong client communication practices to clearly explain technical concepts and implementation trade-offs. Architected and initiated development of the Functional CMS—an extensible, on-demand website and application platform designed to evolve alongside client requirements. Delivered multiple production web applications using .NET Core with C# and F#, with source code hosted and deployed via Microsoft Azure. Actively working with AI tools like Claude model inside Github Copilot as well as ChatGPT to improve the time of delivery of products. All UI is created using SvelteKit(TypeScript, JavaScript

Architected and implemented a scalable Policy Management API aligned to client-specific requirements within an AWS event-driven ecosystem. Acquired deep domain knowledge of insurance operations and regulatory constraints to guide compliant and efficient system design.

Led migration of a legacy .NET Framework (with C#) application to modern .NET Core (with C#) with Typescript standards, improving performance, maintainability, and long-term scalability. Increased operational stability by resolving systemic issues and reducing failure rates across critical business applications. Initiated the foundational architecture for a new policy management platform supporting future client integrations. All services deployed and operated on AWS PaaS infrastructure.