# Kyrylo Lukianenko

Kyrylo Lukianenko is a remote worker on Himalayas, Independent Product Work at Self Employed, based in Poland.

Source: https://himalayas.app/@kyrylolukianenko

```text
Senior .NET backend developer at Rentals United who cut availability API p95 latency from 800 ms to 120 ms at ~1M requests/day.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Poland |
| Authorized to work in | Poland |
| Salary expectations | 350k+ PLN |
| Job categories | .NET Backend Developer |
| Skills | C#, .NET, ASP.NET Core, Backend Development, Microservices, LLM Application Development, OpenAI API, Anthropic API, AI Agents, Model Context Protocol (MCP), RAG, Structured Outputs, LLM Evaluation, Prompt Design, REST APIs |
| LinkedIn | https://linkedin.com/in/kirill-lukianenko-886920147 |

## What I'm looking for

```text
I’m open to B2B or an employment contract (UoP), and to remote or hybrid work in Warsaw.
```

## About

```text
At Rentals United, I designed and built backend microservices for a vacation-rental channel manager, connecting platforms including Airbnb, Booking.com and Expedia. I rewrote hot-path queries from EF Core to Dapper, cutting availability API p95 latency from 800 ms to 120 ms at ~1M requests per day.

I also built real-time updates over WebSockets and SignalR, plus queue-based synchronization with AWS SQS. Multi-level caching and retry policies cut average response time on frequently used endpoints by ~40% and failed sync calls by ~30%.

In my independent product work, I’ve shipped five LLM features into production. I’ve built .NET and Node.js agents using Anthropic Claude and OpenAI APIs, including a tool-using agent with MCP servers and a scheduled job-search agent that filters and deduplicates listings before LLM scoring.

For MyFamily, I built a voice assistant that retrieves family data through tools and returns changes validated against a strict JSON Schema. I also created evaluation cases to compare models and settings, and built vision and transcription pipelines for receipts and documents.
```

## Experience

### Independent Product Work (current)

Self Employed. Jan 2026 - Present

```text
Built and shipped AI products and agents end to end, including backend, LLM integration, evaluation, clients, and deploys. Five LLM features are in production use.
```

Skills: C#, .NET, NodeJS, Anthropic-Claude-API, MCP, RAG, OpenAI, Firebase, Firestore, React-Native, Expo, SQLite, GCP, TypeScript, JSON-schema, Evaluation-Suites

### .NET Backend Developer

Rentals United. Mar 2019 - Jul 2026

```text
Designed and built backend microservices following Clean Architecture and CQRS, covered with unit and integration tests. Rewrote hot-path queries from EF Core to Dapper, cutting availability API p95 latency from 800 ms to 120 ms at ~1M requests/day.
```

Skills: C#, .NET, ASP.NET-Core, EF-Core, Dapper, Clean-Architecture, CQRS, xUnit, NUnit, NSubstitute, Fluent-Assertions, BDD, Gherkin, MS-SQL-Server, MySQL, T-SQL, Stored-Procedures, Indexing, Execution-Plans, REST, WebSockets, SignalR, Amazon-SQS, AWS, EC2, S3, DynamoDB, AutoScaling, Cloudwatch, TeamCity, AWS-CodePipeline, Angular, Vue.Js, TypeScript, OpenAI, Anthropic, AI-Coding-Tools, Claude-Code, Cursor, GitHub-Co-Pilot

### C# Software Engineer

AmcBridge. Nov 2014 - Sep 2016

```text
Developed C# plugins and extensions for CAD/BIM platforms, implemented client-server integrations with WCF services and WPF UI, and configured Jenkins build pipelines.
```

Skills: C#, AutoCAD-APIs, Revit-API, Dynamo-API, WCF, WPF, Jenkins

## Education

### Lublin University of Technology

Master's Degree, Computer Engineering. 2017 - 2018

```text
Master's Degree in Computer Engineering with a focus on Computer Graphics.
```

### Khmelnytsky National University

Master's Degree, Computer Science. 2011 - 2017

```text
Master's Degree in Computer Science and Engineering.
```

## Tech stack

- AWS CodePipeline
- Jenkins
- React Native
- Expo
- MySQL
- PostgreSQL
- SQLite
- Node.js
- .NET
- ASP.NET Core
- Neo4j
- Redis
- Vue.js
- JavaScript
- C#
- Blazor
- WCF
- GraphQL
- Firebase
- SignalR
- TypeScript
- Docker
- SQL
- TeamCity
- OpenAI API
- Cursor
- GitHub Copilot
- Model Context Protocol (MCP)
- Claude Code
- Retrieval-Augmented Generation (RAG)
- Entity Framework Core
- Dapper
- AWS
- REST APIs
- Azure
- Angular
- HTML
- CSS

To contact Kyrylo, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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