Дмитро

Dmytro Bielash
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | github.com/Fririz

Summary
Backend .NET Developer with commercial experience on the Microsoft and Azure stack (ASP.NET Core, EF
Core, SQL). Builds REST APIs, third-party integrations, and ETL pipelines.

Technical Skills
Core Stack: C#, ASP.NET Core, EF Core, SQL (PostgreSQL, MSSQL, Azure SQL), Redis
Cloud & DevOps: Azure, Git, CI/CD, Docker, Linux
Familiar with: Salesforce integration, RabbitMQ, gRPC, Angular, TypeScript
Languages: English (B2), Ukrainian (Native)

Experience
Crew Red March 2026 – Present
Backend .NET Developer Full-Time Kyiv, Ukraine
Project 1 - Mobile App Backend - Health Domain C#, ASP.NET Core Web API, Azure
• Built and maintained REST API endpoints for a health-focused mobile app with business logic, EF Core data

access, and request validation.
• Integrated the Fitbit API end-to-end (OAuth, data sync, request/response mapping) to bring users’ activity and

health metrics into the app.
• Maintained and debugged an OpenAI integration generating personalized health reports, handling prompt logic,

response mapping, and outbound-call errors.
• Migrated Azure Functions to the .NET isolated worker model, decoupling functions from the host process; used

Service Bus and Key Vault for async workflows and secrets.
• Diagnosed production issues via Application Insights and resolved backlog items with QA.

Project 2 - Fintech Data Processing (ETL & API) C#, Salesforce, PCI DSS
• Evaluated Salesforce ingestion strategies (CDC, Bulk API, legacy XML flow) and chose CDC for the

event-driven/subscription architecture, weighing latency, throughput, and API limits.
• Built console-based ETL apps that ingest, transform, and move financial data across Azure Blob Storage,

Salesforce, and SQL, handling multiple file formats at scale.
• Worked on isolating cardholder-data flows to meet PCI DSS requirements.

Projects
Online File Storage (Pet Project) | C#, ASP.NET Core, gRPC, RabbitMQ, Redis, Docker Oct 2025 – Present
• Developed a scalable file-storage backend in ASP.NET Core, split into services to practice distributed system

patterns and Clean Architecture.
• Implemented file upload/download with MinIO and streamed large files to significantly reduce memory usage.

• Built inter-service communication with gRPC (sync) and RabbitMQ (async), fronted by an Ocelot API Gateway

with JWT auth; covered core logic with xUnit/Moq tests.
• Configured full infrastructure in Docker Compose, including PostgreSQL, Redis for caching, and the ELK Stack for

centralized logging.

Instant Wellness Kit (Hackathon) | Live Demo | C#, ASP.NET Core, PostgreSQL, PostGIS, Docker Feb. 2026
• Led a backend team of 2 on a Modular Monolith design with strict domain isolation across Auth, E-commerce, and

Tax boundaries.
• Engineered a location-based tax engine using PostGIS and GeoJSON to dynamically compute regional rates.

• Optimized queries with Trigram indexing for fast text search and built a CSV bulk-import service for large

datasets.
• Implemented JWT auth and image storage for product catalogs, with automated CI/CD via GitHub Actions.

Education
Igor Sikorsky Kyiv Polytechnic Institute Kyiv, Ukraine
Bachelor of Software Engineering Sep. 2024 – June 2027