Ілля

Illia Oleksii
.NET Developer
[відкрити контакти](див. вище в блоці «контактна інформація») · [відкрити контакти](див. вище в блоці «контактна інформація») · Vodnjan, Croatia · [відкрити контакти](див. вище в блоці «контактна інформація»)

.NET Developer with 5+ years of experience building and maintaining high-load systems. Skilled in
microservices architecture, performance optimization, and full-stack development. Comfortable leading
agile teams and delivering complex solutions across tight timelines.

SKILLS
Languages C#, JavaScript, TypeScript, SQL
Frameworks .NET 8, ASP.NET Core, React, AngularJS
Databases MS SQL Server, PostgreSQL, MongoDB, Redis
Tools Docker, RabbitMQ, MassTransit, ServiceStack, SignalR
Cloud & DevOps Azure, AWS, CI/CD, Jenkins, Serilog, Prometheus, Grafana

EXPERIENCE
Full-Stack Developer (.NET / React) — Handyman UK Jan 2026 – Present
Part-time
– Built and maintained a UK-focused platform for finding local handymen, covering service listings,
booking, and profile management
– Developed React frontend with dynamic search, filtering by location and trade category, and
responsive UI
– Implemented .NET backend REST APIs for user authentication, job posting, and handyman matching
– Integrated geolocation and postcode-based search to connect customers with nearby tradespeople
across the UK
.NET Developer — Neolink Ukraine Sep 2024 – Dec 2025
– Built real-time notification service with SignalR, SendGrid, and messenger integrations
– Developed AI-powered supplier search and categorization using the ChatGPT API
– Implemented referral-based supplier onboarding system via email invitations
– Created automated PDF and Excel reporting for full tender documentation
– Integrated e-signature service for digital document signing
Full-Stack Developer (.NET / React) — Intetics Ukraine May 2021 – Aug 2024
– Refactored patient treatment plan logic and workflow management
– Migrated microservices from Entity Framework to Dapper for improved performance
– Built reusable React component with Excel export and standardized CRUD endpoints for 10+ tables
– Integrated AI face recognition module for the patient scheduling system
– Maintained Jenkins CI/CD pipelines for automated testing and deployment
PROJECTS
Handyman UK Platform 2026 – Present
.NET 8, ASP.NET Core, React, PostgreSQL, Azure, Docker, Part-time
– UK-focused web platform connecting customers with local handymen across various trade
categories
– Full-stack development: React frontend with location-based search, .NET backend with REST APIs,
PostgreSQL database
– Implemented postcode/geolocation search, booking workflow, and handyman profile management
– Deployed on Azure with Docker containerization and CI/CD pipeline
Tender Management Platform 2024 – 2025
C#, .NET 8, SQL Server, PostgreSQL, RabbitMQ, Azure, SignalR, ChatGPT API, Microservices
– Designed and built a cloud-hosted tender management platform handling the full lifecycle from
creation to supplier selection and contract signing
– Developed real-time notification service using SignalR to keep suppliers and managers instantly
informed on tender status changes
– Implemented AI-powered supplier search and categorization via ChatGPT API, reducing manual
matching effort and improving search accuracy
– Built a referral-based supplier onboarding system with automated email invitations and tracking via
SendGrid
– Created comprehensive PDF and Excel report generation covering full tender documentation using
iText7 and ClosedXML
– Integrated a third-party e-signature service enabling fully digital, legally compliant document signing
within the platform
– Designed event-driven microservices communication with RabbitMQ to decouple notification,
reporting, and core tender services
– Deployed and maintained services on Azure App Service with CI/CD pipelines for automated builds
and releases
Clinic Management System 2021 – 2024
.NET 5–8, MongoDB, Docker, RabbitMQ, PostgreSQL, MS SQL, Redis, Jenkins, Microservices
– Built and maintained a large-scale clinic management system covering patient registration,
treatment planning, scheduling, and workflow management
– Refactored complex patient treatment plan logic, improving code maintainability and reducing the
occurrence of workflow-related bugs
– Migrated multiple microservices from Entity Framework to Dapper, resulting in measurable query
performance improvements on high-traffic endpoints
– Developed a generic reusable React component with Excel export and standardized CRUD API
endpoints, reducing development time across 10+ similar database entities
– Integrated AI-based face recognition for patient check-in and scheduler automation, improving
front-desk efficiency
– Implemented Redis caching strategies across key services, reducing database load and improving
response times for frequently accessed data
– Built event-driven inter-service communication using RabbitMQ, enabling reliable async processing
for appointments, notifications, and billing
– Maintained and extended Jenkins CI/CD pipelines for automated testing, build validation, and
multi-environment deployments
– Worked across the full stack — 60% backend (.NET, SQL, microservices) and 40% frontend (React) —
delivering features end-to-end

EDUCATION
Bachelor's Degree in Computer Science 2020 – 2024
Vinnytsia National Technical University, Ukraine
LANGUAGES
Ukrainian — Native English — B2 Croatian — A2