06/01/2026 updated

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Software Architect and Senior .NET Engineer

Reading, United Kingdom
Only remote
Master's degree in Computer Science, Coventry University (2008)
Reading, United Kingdom
Only remote
Master's degree in Computer Science, Coventry University (2008)

Profile attachments

SimonSasin.v46.docx

ASP.NETJavaScript.NET FrameworkMicrosoft AzureC Sharp (Programming Language)Client Server ModelsCloud EngineeringManaged Extensibility Framework (.NET Framework)Azure SQLSoftware ArchitectureSvelteAngular 2+Solution ArchitectureTypeScriptAzure Service BusAzure Automation.NET CoreBlazorCloud TechnologiesBackendReact NativeASP.NET ApplicationsDomain Driven DesignMicroservices
.NET Backend Development
Primary experience with .NET-based languages including F# and C#, delivering scalable backend services, APIs, and production-ready applications across .NET Framework and .NET Core environments.

Cloud Technologies (Azure & AWS)
Extensive experience designing and operating solutions on Microsoft Azure and AWS, including Azure PaaS services, Azure DevOps, Azure Service Bus, Azure Cosmos DB, and AWS event-driven ecosystems.

Software Architecture
Deep expertise in Microservices, SOLID principles, Clean Code practices, Azure Functions, and Domain-Driven Design (DDD), applied across enterprise and start-up environments.

Frontend Development
Hands-on experience with TypeScript and JavaScript using modern frameworks including Svelte, Vue, React, Angular, React Native, Remix, and SvelteKit.

DevOps & CI/CD
Advanced expertise in build automation and CI/CD pipelines using Cake, PowerShell, Azure DevOps, TeamCity, Jenkins, and AppVeyor.

Data Storage
Proficiency with SQL Server, PostgreSQL, NoSQL databases, RavenDB, Azure Cosmos DB, and Event Sourcing patterns.

AI Tools
Practical experience working with ChatGPT, GitHub Copilot using the Claude model, and Gemini to improve development efficiency and product delivery.

Mobile Development
Experience designing and developing multiplatform mobile applications using .NET and MAUI Framework, including AI-powered features.

CRM & Enterprise Solutions
Experience extending and customising CRM solutions, including Dynamics CRM, with Angular-based frontends and ASP.NET APIs, as well as implementing OAuth-based authentication and enterprise design standards.

Languages

GermanBasic knowledgeEnglishNative speakerPolishNative speakerSpanishBasic knowledge

Project history

Senior Software Developer

Methodworx, Guilford
Integrated into an established engineering team delivering complex mobile-focused solutions for enterprise clients in a start-up environment. Expanded loyalty platform capabilities across backend services (.NET using C# APIs) and user interfaces (React with TypeScript and Blazor). Built production-ready functionality for secure file-sharing workflows, delivered a remote table-management solution, and deepened expertise in React, React Native, and Remix. Added new functionality to preexisting Sitecore 8 projects and actively used AI (GitHub Copilot) during the work.

Owner and Architect

Functional IT Solution
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, architected and initiated development of the Functional CMS, and delivered multiple production web applications using .NET Core with C# and F#, hosted and deployed via Microsoft Azure. All UI created using SvelteKit (TypeScript, JavaScript).

Architect and Software Engineer

Collinson Group, London
Architected and implemented a scalable Policy Management API aligned to client-specific requirements within an AWS event-driven ecosystem. Led migration of a legacy .NET Framework (C#) application to modern .NET Core (C#) with TypeScript standards. Initiated the foundational architecture for a new policy management platform supporting future client integrations. All services deployed and operated on AWS PaaS infrastructure.

Software Engineer

Madetech, London
Contributed to the development of a multi-microservice ASP.NET (C#) platform with dual-site integration. Mentored junior developers on design patterns and modern development practices. Introduced ASP.NET Core best practices to improve code quality and extensibility. Played a key role in tailoring a Dynamic CRM solution to meet specific client requirements. All systems hosted and managed using Microsoft Azure PaaS services.

Architect and DevOps Engineer

Zupa Tech Ltd, Southampton
Served as a core member of the architecture team delivering a large-scale chain management platform built on microservices, document databases, and event sourcing. Backend implemented in .NET with React and TypeScript at the front. Designed and delivered automated build and deployment tooling. Implemented reusable monitoring templates within Azure, improved inter-service communication using the Saga pattern, and enabled consistent messaging via Azure Service Bus. Solutions deployed entirely on Microsoft Azure PaaS.

Software Engineer

Wealth Dynamic, London
Extended and customised CRM solutions to align with client-specific workflows. Managed day-to-day development activities including defect resolution, feature delivery, and system configuration. Specialised in Angular-based frontend development integrated with ASP.NET APIs for Dynamics CRM data management.

Architect and Senior Software Developer

Vigilant Applications, Theale
Acted as Architect and Lead Developer for a specialist software organisation focused on security and data processing. Led the redesign of a user monitoring platform using .NET Framework and ZeroMQ. Maintained and evolved CI/CD infrastructure transitioning from Jenkins to AppVeyor. Delivered additional solutions using F# on .NET Core and designed a Vue.js and ASP.NET Core-based data import platform.

Lead Software Developer

Autino, Reading
Led a development team of eight, embedding Clean Code principles and SOLID design practices across multiple projects. Facilitated Scrum ceremonies and delivered and maintained three garage management applications built with ASP.NET MVC, C#, and IdentityServer4. All systems deployed to Microsoft Azure with automated delivery pipelines managed via Azure DevOps.

Senior Software Developer

FISERV, Bracknell
Modernised a legacy ASP.NET risk management platform used for fraud detection and AML compliance. Implemented new transaction processing features including NACHA import workflows. Applied Behaviour-Driven Development (BDD) to strengthen test coverage. Contributed to the design of a next-generation risk management solution with OAuth-based authentication and comprehensive API exposure. Delivered a reusable AngularJS framework adopted across multiple internal applications.

Senior .NET Developer

Contemi, Reading

Contractor

Various .NET(C#) contract roles

Senior Developer

HeathWallace, Reading

Senior Software Developer

IBundle, Farnham

System Consultant

The AA, Basingstoke

Developer

Artemis/Ascentiun

Certificates

Azure Administrator Associate

Microsoft

2023


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