Kirill

KIRILL MELNYKOV
.NET Backend Developer
Odesa, Ukraine · Remote, Hybrid

• LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
• GitHub: https://github.com/melnykovk
• Telegram: @kirill_workspace
• Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
• Email: [відкрити контакти](див. вище в блоці «контактна інформація»)

PROFILE

.NET backend developer with hands-on experience in ASP.NET Core, PostgreSQL and REST API
design. Built a license-based backend with JWT authentication for a desktop application and
developed Backtest Engine, an event-driven backtesting system with historical data ingestion,
order execution simulation, parallel run execution and a React web interface. Interested in SaaS
products, third-party integrations and data-driven backend work.
Seeking a Junior/Middle Backend position.

TECHNICAL SKILLS

Languages: C#, SQL, TypeScript

Backend: .NET 10, ASP.NET Core Web API, REST APIs, dependency injection, asynchronous
programming

Databases: PostgreSQL, Entity Framework Core, Npgsql, database migrations, transactions

Concurrency: Task-based programming, .NET ThreadPool, parallel execution

Testing: xUnit, unit testing of business logic and execution rules

Frontend: React, TypeScript, Vite, HTML, CSS

Tools and integrations: Git, GitHub, Binance.Net, CSV export

WORK EXPERIENCE

C#/.NET Developer

Open-Source Backtest Engine | March 2026 – Present
https://github.com/melnykovk/BacktestEngine

- Developed a candle-by-candle simulation engine for grid trading strategies, processing
historical market data in chronological order.
- Implemented intrabar limit-order execution rules, portfolio state tracking, configurable
trading fees, and backtest statistics.

- Designed a dataset metadata index that stores candle counts and date boundaries,
avoiding repeated aggregate queries over the historical candle table when listing
datasets.
- Enabled parallel execution of independent backtest configurations using Task.Run and
the .NET ThreadPool.
- Integrated Binance historical market data with PostgreSQL using Entity Framework Core
and Npgsql.
- Implemented dataset upload and deletion as transactional operations, keeping candle
records and dataset metadata consistent.
- Wrote xUnit tests for rolling averages, timeframe validation, grid construction, portfolio
validation and initialization, and order execution conditions.
- Built a React + TypeScript interface for dataset management and backtest configuration.

C#/.NET Developer
Independent Software Development | February 2025 – March 2026

- Designed, built and maintained a C#/.NET application for in-game automation use:
WinForms desktop control panel and ASP.NET Core backend.
- Implemented a REST API with JWT authentication, license-key validation and server-side
business logic, built the infrastructure for a subscription model.
- Integrated Telegram Bot API for notifications, implemented image recognition (EmguCV)
and scheduled monitoring tasks with logging.
- Operated the system continuously 24/7, handling updates and bug fixes.

EDUCATION

Bachelor's Degree in Navigation — 2021

LANGUAGES

English: B2.

Ukrainian: Native.
Russian: Native.