Катерина

KATERYNA SYDORENKO
Backend .NET Developer

[open contact info](look above in the "contact info" section) | LinkedIn Profile | GitHub Profile

SUMMARY
Backend .NET Developer with 2+ years of commercial experience building reliable
backend services with C#. Takes features end to end: from clarifying requirements
with stakeholders through design, coding, testing and debugging to production
release. Focuses on maintainable, well-structured code, stable and observable
systems, and fast response to production issues.

TECHNICAL SKILLS
Backend: .NET/C#, ASP.NET Core, Web API/REST API, Entity Framework Core, Dapper,
ADO.NET, SignalR, Apache Kafka

Frontend: HTML/CSS/SCSS, JavaScript, TypeScript, React, Next.js, Redux Toolkit

Databases: PostgreSQL, MS SQL Server, SQL/T-SQL, Redis, MongoDB, Neo4j, Azure Blob
Storage

Cloud/DevOps: Docker, GitHub Actions, CI/CD, Kubernetes (basics), DigitalOcean, Hetzner,
Heroku

Testing: Unit testing, Integration testing, xUnit, Testcontainers, k6

Practices & Tools: OOP, SOLID, KISS, DRY, Microservices, Scrum, Kanban, Git, Jira, Trello

AI Tools: Claude Code, GitHub Copilot, Skills, MCP

WORK EXPERIENCE
Full Stack .NET Developer | InOpter & AvocadoAI | Aug 2024 – Aug 2026 | Part-time |
Remote

Tech stack: C#, ASP.NET Core, Entity Framework, PostgreSQL, Docker, DigitalOcean, React,
TypeScript, Redux Toolkit

Developed and evolved web services on ASP.NET Core for a restaurant operations and
inventory analytics platform, delivering features end to end across backend and frontend.
Built REST APIs with ASP.NET Core Web API and Entity Framework Core; identified and
optimized slow SQL queries, removing performance bottlenecks in data-heavy operations.

Designed and deployed a dedicated logging and alerting microservice that centralizes
exception logging and sends automated notifications, eliminating silent failures and
enabling near-immediate response to production incidents.
Integrated external APIs and third-party services together with partner teams.
Built real-time dashboards and long-running process handling in React and TypeScript.
Translated business requirements into technical solutions through requirements analysis
and interface planning with stakeholders.

PROJECTS
SkillMap (university project) | Full Stack Developer | 2026 | GitHub: SkillMap

Gathered requirements, designed the architecture and built a full-stack learning roadmap
platform on ASP.NET Core with a real-time graph editor.
Implemented an event-driven architecture with Apache Kafka as the message broker and
SignalR for low-latency real-time updates.
Designed polyglot persistence: Neo4j for graph-based roadmap structures and
PostgreSQL for relational data.
Covered the backend with unit and integration tests (xUnit, Testcontainers) and ran load
tests with k6 to find bottlenecks under concurrent load.
Automated CI/CD deployment to a Hetzner cloud server.

EDUCATION
Master of Software Engineering | Kharkiv National University of Radio Electronics | 2026 –
2028

Bachelor of Software Engineering | Kharkiv National University of Radio Electronics | 2022 –
2026

LANGUAGES
Ukrainian: Native

English: Upper-Intermediate (B2), DET Certificate