Eugene Blokhin

Senior Software Engineer / Team Lead (Freelance)

I am a team lead and senior software engineer at Firely where I work on the Firely Server, a FHIR server that is used by healthcare organizations worldwide. My role involves leading a team of developers, planning, designing and implementing new features, and ensuring the quality and performance of our software.

• Tech stack: ASP.NET Core, SQL Server, MongoDb, Docker, Azure Dev Ops, Kubernetes, OpenTelemetry
• Led and designed architecture during a consultancy project where we developed an ETL pipeline to migrate data from a proprietary database to Firely Server for one of our large clients
• Took on a challenging project related to DB querying performance and implemented ASTs to optimize the query execution. This resulted in a 1000x performance improvement in some scenarios and eliminated performance pressure for some of the company's key clients.

Technical Co-founder / Acting CTO

Led the end-to-end development of a freelance marketplace for the Czech market. Owned the full technical stack and delivery process, transforming business requirements into a production-ready MVP with a clean, scalable architecture.

• Tech leadership: Defined the architecture and selected technologies across backend, frontend, deployment, and integrations
• Requirements to architecture: Analyzed business needs and decomposed them into a system design optimized for maintainability and future growth
• Backend: Developed with .NET, PostgreSQL, and MassTransit for scalable async processing
• Frontend: Oversaw integration of a frontend with the backend API
• Deployment: Set up automated CI/CD with Argo CD and Kubernetes, managing multiple environments via GitOps
• Integration: Added analytics and operations tooling, including Meta Pixel, cookie consent, telemetry, and SendGrid for error alerts
• AI exploration: Prototyped an AI agent to enhance user interaction and explore future capabilities

Tech Lead (freelance)

Led the development (designing the architecture, building, and maintaining) of controlling software for a hardware 3D scanner. The generated 3D models were used in a AR/VR marketplace.

• Tech stack: ASP.NET Core (Blazor), C++, Linux, Raspberry Pi, Arduino
• Re-wrote the original solution and improved code maintainability and reliability
• The high-level part is an ASP.NET Core Blazor-based web application running on Raspberry Pi (Linux)
• The low-level part is written in C++ and runs on ATMega328P micro-controllers

Senior Software Developer

• Tech stack: C#/.NET, Azure Storage/Functions/App Services/Service Bus/ARM templates
• Designed and created a backup solution for our event-sourcing system log stored in Azure Tables (> 2.5 TB of data)

Software Developer

• Tech stack: C#/.NET, NServiceBus, Azure Storage/App Services/ServiceFabric/Service Bus...
• Wrote custom serialization/deserialization implementation for Azure Table Storage which worked 20x faster than the default Microsoft implementation
• Pioneered rewriting our initially synchronous order flow to use asynchronous messaging architecture. It opened up a way for extending functionality and dramatically increased reliability. It still facilitates the processing of ~200k orders per day
• Created a module to calculate and generate invoices for our clients

Software Engineer

Built and maintained software powering out photo-products production facilities in The Netherlands and India.

• Tech stack: C#/.NET, ASP.NET, SQL Server, RabbitMQ

Software Developer

• Tech stack: C#/.NET, ASP.NET WebApi, SQL Server

Junior Software Developer

• Tech stack: C#/.NET, Unity3D