I am an accomplished software engineer and architect with extensive experience in software design and development. I take a holistic approach to architecture and am fluent in multiple platforms and languages, enabling me to deliver scalable, maintainable solutions.\n\nI excel at leading teams and mentoring others while ensuring project delivery. I design and implement microservices, drive cloud adoption, and am proficient in C#, Java, JavaScript, F#, and TypeScript, enabling me to build robust applications across the SDLC.

Szymon Sasin

I am an accomplished software engineer and architect with extensive experience in software design and development. I take a holistic approach to architecture and am fluent in multiple platforms and languages, enabling me to deliver scalable, maintainable solutions.\n\nI excel at leading teams and mentoring others while ensuring project delivery. I design and implement microservices, drive cloud adoption, and am proficient in C#, Java, JavaScript, F#, and TypeScript, enabling me to build robust applications across the SDLC.

Available to hire

I am an accomplished software engineer and architect with extensive experience in software design and development. I take a holistic approach to architecture and am fluent in multiple platforms and languages, enabling me to deliver scalable, maintainable solutions.\n\nI excel at leading teams and mentoring others while ensuring project delivery. I design and implement microservices, drive cloud adoption, and am proficient in C#, Java, JavaScript, F#, and TypeScript, enabling me to build robust applications across the SDLC.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent
Javanese
Advanced

Work Experience

Senior Software Developer at Methodworx, Guilford
January 1, 2025 - Present
Joined already established software team working on developing complex solutions to handle mobile applications for one of the clients. My tasks consist of adding new functionality for both backend and UI as well as maintaining the existing solution. Gained knowledge of React, especially React Native and Remix. This makes me versatile in all popular SPA frameworks on the market. Delivered the working solution for safe file sharing. Delivered working solution to allow the team to remotely manage the tables for the given restaurants for main company product.
Owner and Architect at Functional IT Solutions
January 1, 2025 - Present
I have been building the new and lean service company. My aim was to help a small business owner with all their digital need. The company aim to help with any technical need for the non-technical companies. Improved my ability to talk with non-technical people about technical concept. To help them to understand what is required and why. Started building the Functional CMS. The advanced on demand website building system. Deliver server websites and other technical solution to improve the workflow of my clients.
Architect and Software Engineer at Collinson Group, London
May 1, 2022 - February 1, 2024
Developed a robust Policy Management API tailored for client-specific needs, integrated within an AWS event-driven architecture to ensure high scalability and modern tech utilisation. Gained in-depth understanding of internal insurance workflows and regulatory requirements to drive process optimisation and compliance. Spearheaded the migration of a legacy .NET Framework application to the latest .NET Core standard, enhancing performance and compatibility for future scalability. Boosted efficiency in insurance claim handling by implementing targeted platform updates to align with evolving business needs, addressed software gaps, and enhanced reliability by troubleshooting and resolving existing issues. Maintained critical .NET Framework-based business application, ensuring continuous operational integrity. Initiated architecture for new Policy management API, laying foundation for robust client service integration. All solution had been hosted and deployed to AWS PaaS platform.
Software Engineer at Madetech, London
January 1, 2022 - May 1, 2022
Elevated team efficiency by contributing to ASP.NET application development, encompassing multiple microservices and dual-site integration. Strengthened team skill sets by mentoring junior developers on effective development patterns and recommending essential learning resources for continuous growth. Enhanced client security strategies by advising on robust, up-to-date security practices tailored to meet project needs. Improved application quality by introducing best practices in ASP.NET Core, providing guidance on advanced functionality. Played a key role in customising a Dynamic CRM solution to meet specific client requirements. All solution had been hosted on Microsoft Azure PaaS.
Architect and DevOps Engineer at Zupa Tech Ltd, Southampton
June 1, 2020 - December 1, 2021
Joined the main project as an architecture team member, contributing to a chain management tool built on microservices, document DB, and event sourcing. Streamlined deployment processes by designing and delivering automated build scripts for efficient environment setup and Git repository management. Created a template-based monitoring solution within Azure Cloud for scalable, efficient system oversight. Championed high-quality standards by advocating for clear, precise ticketing practices that enhance workflow clarity and execution. Improved microservice communication by collaborating on design enhancements, implementing the Saga pattern, and optimising message bus usage. Enabled consistent microservice communication through ServiceBus integration, fostering reliable data exchange across services. Developed core components for a microservices-based application, ensuring scalability and robust performance. Played a key role in the DevOps team, supporting delivery teams with deployment a
Software Engineer at Wealth Dynamic, London
August 1, 2019 - April 1, 2020
Customised and enhanced Wealth Dynamic's existing CRM solutions to meet specific client requirements. Managed daily operations involving bug resolution, new feature development, and solution customisation. Configured and extended CRM data structures, forms, and security access, improving overall system functionality and user experience. Specialised in Angular frontend development for seamless integration with ASP.NET API for robust Dynamics CRM data management.
Architect and Senior Software Developer at Vigilant Applications, Theale
February 1, 2018 - July 1, 2019
Served as Architect and Lead Developer for a specialised software house centred on security and data manipulation, architecting tailored solutions from initial concept through execution. Led the rewrite of a user monitoring system using .NET Framework and seroMQ for streamlined internal communication, incorporating behaviour tracking and a policy engine for automated decision-making, with YAML-based configuration. Oversaw CICD infrastructure maintenance, initially on Jenkins, with a later transition to AppVeyor for improved deployment workflows. Delivered additional projects leveraging F# on .NET Core, applying functional programming techniques for enhanced efficiency and precision. Designed and developed a data import application in Vue.js and ASP.NET Core with C# and .NET Core, enabling seamless configuration for complex data import processes through intuitive decision-making steps. Leveraged polyglot programming expertise to upgrade various software projects, ensuring adaptability a
Lead Software Developer at Autino, Reading
July 1, 2017 - December 1, 2017
Guided a development team of eight, imparting knowledge of CleanCode principles and SOLID design patterns. Conducted Scrum ceremonies, including daily stand-ups, sprint planning, and retrospectives, to maintain project momentum and team cohesion. Engaged in development and management of three distinct garage management applications, utilising ASP.NET MVC, C#, and IdentityServer 4 to ensure robust security and user authentication. Pioneered the adoption of CleanCode practices, significantly enhancing code maintainability and reducing technical debt. All solution had been hosted on Microsoft Azure platform with automatic deployment controlled by Azure DevOps.
Senior Software Developer at FISERV, Bracknell
May 1, 2015 - June 1, 2017
Optimised legacy ASP.NET application for risk management and fraud detection, ensuring compliance with AML regulations. Implemented new features like the NACHA importer to organise financial transactions. Applied Behaviour Driven Development (BDD) to create robust unit tests, improving code reliability. Steered development of a next-generation risk management platform with modern OAuth authentication and comprehensive API exposure. Navigated the integration of the company's design language into Angular components, enhancing user interface consistency across applications. Delivered a base AngularJS framework to be utilised as a library by other applications, streamlining front-end development processes. Designed and executed the initial deployment of risk management and detection software, elevating security infrastructure. Promoted team's adoption of Kotlin for back-end development, contributing to the modernisation of the software architecture. Played a key role in transforming a trad
Owner and Architect at Functional IT Solution
January 1, 2025 - Present
Founded lean service company; focused on communicating with non-technical clients and translating needs into technical requirements; started Functional CMS and an on-demand website builder; delivering server-side websites and workflows to improve client operations.
Senior Software Developer at Methodworx
January 1, 2025 - Present
Joined an established software team working on complex mobile applications for a client; implemented new backend and UI functionality; maintained and evolved the existing solution. Gained familiarity with React, React Native, and Remix, enabling versatility across major SPA frameworks. Delivered a safe file sharing solution and a remote table management feature for the company’s restaurant product line.
Functional IT Solution Owner and Architect at Functional IT Solutions
January 1, 2025 - Present
Built a lean service company to assist non-technical businesses with digital needs. Improved ability to communicate technical concepts to non-technical clients, started the Functional CMS, and delivered server-side websites and other solutions to streamline clients’ workflows.
Architect and Dev Ops Engineer at Zupa Tech Ltd, Southampton
June 1, 2020 - December 1, 2021
Joined the core project as an architecture team member for a chain management tool built on microservices with document DB and event sourcing. Automated build scripts, created template-based Azure monitoring solutions, and enforced clear ticketing to improve workflow. Enhanced microservice communication with Saga pattern and ServiceBus; contributed to UI in React; hosted on Azure PaaS.
Architect and Software Engineer at Collinson Group
May 1, 2022 - February 29, 2024
Developed a policy management API within an AWS event‑driven architecture; migrated a legacy .NET Framework app to .NET Core; improved insurance claim workflows; led architecture for client services and ensured compliance and scalability.
Software Engineer at Madetech
January 1, 2022 - May 31, 2022
Contributed to ASP.NET Core microservices and dual‑site integration; mentored junior developers; advised on security; enhanced code quality; customized a Dynamic CRM solution; hosted on Azure PaaS.
Architect and DevOps Engineer at Zupa Tech Ltd
June 1, 2020 - December 31, 2021
Architect for a chain management tool based on microservices, document DB and event sourcing. Implemented automated builds, Azure monitoring, Saga pattern, ServiceBus integration, and a React UI; deployed on Azure PaaS.
Software Engineer at Wealth Dynamic
August 1, 2019 - April 30, 2020
Customized and extended CRM for Dynamics; focused on Angular frontend to integrate with ASP.NET API; improved data structures and security, enhancing user experience.
Architect and Senior Software Developer at Vigilant Applications
February 1, 2018 - July 31, 2019
Architect and lead developer for a security‑focused software house; rewrote a user monitoring system with .NET Framework and seroMQ; oversaw CICD transitions, delivered polyglot projects leveraging F# on .NET Core, and built a Vue.js + ASP.NET Core data import tool.
Lead Software Developer at Autino
July 1, 2017 - December 31, 2017
Led a team of eight; championed CleanCode and SOLID; developed three ASP.NET MVC garage management apps with IdentityServer4; deployed to Azure via Azure DevOps.
Senior Software Developer at FISERV
May 1, 2015 - June 30, 2017
Optimized legacy ASP.NET risk management and fraud detection apps; implemented NACHA importer; applied BDD tests; moved towards a service‑oriented architecture with OAuth and Angular components.

Education

Master's Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Bachelor's Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Master's Degree in Computer Science at Lodz University of Technology
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Bachelor’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Lodz University of Technology
January 11, 2030 - January 13, 2026
Bachelor’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Lodz University of Technology
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Bachelor’s Degree in Computer Science at Coventry University
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Lodz University of Technology
January 11, 2030 - January 13, 2026
Master’s Degree in Computer Science at Coventry University
January 11, 2030 - January 26, 2026
Bachelor’s Degree in Computer Science at Coventry University
January 11, 2030 - January 26, 2026
Master’s Degree in Computer Science at Lodz University of Technology
January 11, 2030 - January 26, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services, Media & Entertainment, Computers & Electronics