11/02/2026 updated
100 % available
Full-Stack Developer | C#/.NET, Go, React & TypeScript
Poznań, Poland
Only remote
Higher National Diploma in Computer Programming, UHI West Highland (2017–2019)About me
Full-stack developer with 6+ years of experience in healthcare, travel and gaming. I build web applications, APIs and integrations with C#/.NET, Go, React and TypeScript. I value clear communication, practical solutions and maintainable code. Fluent in English and Polish.
C Sharp (Programming Language)DevOps.NET CoreReact.jsBackendFull Stack DevelopmentTerraform
C# / .NET Backend Development
Expertise in C#, .NET 8, ASP.NET Core, Entity Framework Core and REST API development, with experience building NHS-compliant healthcare integrations including GP Connect, FHIR and HL7 FHIR features.
React & Frontend Development
Solid experience with React, TypeScript, JavaScript and Redux, including building frontend components for high-traffic platforms and full-stack emergency-lighting management systems.
Cloud & DevOps
Hands-on experience with Azure DevOps, Azure, AWS, Terraform, Docker, GitHub Actions and Jenkins, including CI/CD pipeline setup, infrastructure as code and migration from legacy tooling to cloud-based delivery.
Database Management
Proficiency in SQL Server, PostgreSQL and SQL, including query tuning, migrations and data mapping for clinical and booking platforms.
Microservices & API Integrations
Experience designing and integrating microservices and third-party APIs, including hotel and airline APIs for booking platforms and healthcare data exchange systems.
Go (Golang)
Practical use of Go for building content delivery systems and geolocation services in production environments serving millions of daily visitors.
Node.js & Express
Experience building full-stack applications using Node.js and Express, including warehouse management and emergency-lighting platforms.
Testing & Quality Assurance
Application of Unit Testing, Integration Testing, SonarCloud quality gates, security scanning, test-coverage checks and Dynatrace for code quality and monitoring.
Expertise in C#, .NET 8, ASP.NET Core, Entity Framework Core and REST API development, with experience building NHS-compliant healthcare integrations including GP Connect, FHIR and HL7 FHIR features.
React & Frontend Development
Solid experience with React, TypeScript, JavaScript and Redux, including building frontend components for high-traffic platforms and full-stack emergency-lighting management systems.
Cloud & DevOps
Hands-on experience with Azure DevOps, Azure, AWS, Terraform, Docker, GitHub Actions and Jenkins, including CI/CD pipeline setup, infrastructure as code and migration from legacy tooling to cloud-based delivery.
Database Management
Proficiency in SQL Server, PostgreSQL and SQL, including query tuning, migrations and data mapping for clinical and booking platforms.
Microservices & API Integrations
Experience designing and integrating microservices and third-party APIs, including hotel and airline APIs for booking platforms and healthcare data exchange systems.
Go (Golang)
Practical use of Go for building content delivery systems and geolocation services in production environments serving millions of daily visitors.
Node.js & Express
Experience building full-stack applications using Node.js and Express, including warehouse management and emergency-lighting platforms.
Testing & Quality Assurance
Application of Unit Testing, Integration Testing, SonarCloud quality gates, security scanning, test-coverage checks and Dynatrace for code quality and monitoring.
Experience
Professional experience5 - 10 years
Freelancer since2024
Languages
EnglishFluentPolishNative speaker
Project history
Built .NET 8 REST API endpoints using Entity Framework Core and SQL Server for NHS patient record access. Added data mapping and document exchange, built GP Connect and FHIR features, integrated AI tools for radiology and clinical inbox processing, added SonarCloud quality gates to GitHub Actions pipelines, supported migration from .NET Framework 4 to .NET 8 and from Azure DevOps to GitHub-based delivery, and worked with AWS and Terraform-backed infrastructure.
Helped rebuild content delivery for Bet365 using Go and Contentful for a platform with around 6 million daily visitors. Built React and Redux components for the betting frontend, created a Go geolocation service, tuned PostgreSQL queries and migrations, and helped modernise the Sea of Thieves website delivery pipeline by moving to Azure DevOps.
Integrated hotel and airline APIs into the booking platform, refactored Perl services and fixed integration issues to improve reliability and data accuracy, and built React and Redux features to improve booking screen usability.