Hi, I’m Mykola Kitar, a Senior Backend Engineer focused on building robust, scalable systems with Node.js, NestJS, and TypeScript. I enjoy dissecting complex architectures, improving performance, and writing clean, maintainable code. I’m passionate about AI systems, model evaluation, and collaborating with cross-functional teams to ship high-quality software.

Mykola Kitar

Hi, I’m Mykola Kitar, a Senior Backend Engineer focused on building robust, scalable systems with Node.js, NestJS, and TypeScript. I enjoy dissecting complex architectures, improving performance, and writing clean, maintainable code. I’m passionate about AI systems, model evaluation, and collaborating with cross-functional teams to ship high-quality software.

Available to hire

Hi, I’m Mykola Kitar, a Senior Backend Engineer focused on building robust, scalable systems with Node.js, NestJS, and TypeScript. I enjoy dissecting complex architectures, improving performance, and writing clean, maintainable code.

I’m passionate about AI systems, model evaluation, and collaborating with cross-functional teams to ship high-quality software.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
See more

Language

English
Fluent
Ukrainian
Fluent
Polish
Advanced

Work Experience

Full-Stack Engineer at Xform Technologies
April 1, 2025 - April 1, 2025
Designed and implemented reusable, modular front-end components with React, improving development speed and codebase maintainability by 25%. Developed and optimized RESTful and GraphQL APIs, handling over 100,000 daily requests with low latency and high reliability. Integrated CI/CD pipelines using GitHub Actions and Docker, reducing deployment errors by 70% and enabling faster release cycles. Collaborated cross-functionally with designers, QA engineers, and product managers in Agile sprints, contributing to a 98% on-time delivery rate and supporting the SaaS platform expansion.
Backend Developer at Nexora
April 20, 2023 - April 20, 2023
Remote — Built and optimized RESTful APIs in Node.js (NestJS) and TypeScript, improving API response time by 38% through query optimization and caching. Integrated PostgreSQL and Redis for high-performance data access; implemented Redis Queue (BullMQ) for asynchronous job handling, reducing task processing time by 45%. Improved test coverage from 55% to 87% using Jest and Supertest, significantly reducing production bugs and manual QA effort. Created real-time monitoring dashboards with Prometheus and Grafana, reducing incident response time from 40 minutes to under 15 minutes. Streamlined deployments with Docker + GitHub Actions, reducing manual setup errors by 70% and enabling continuous delivery to staging and production. Conducted regular code reviews to enforce clean-architecture practices, contributing to a 25% decrease in post-release issues and more maintainable modules.
Back End Engineer at X Form Technologies
April 20, 2025 - April 20, 2025
Remote / Bryanka, Ukraine — Designed and optimized backend modules in Node.js + NestJS, improving response time by 25% and ensuring clean modular architecture. Implemented reusable, modular backend components, designed and optimized REST/GraphQL APIs, and integrated PostgreSQL and Redis with efficient data models. Set up Redis Queue for asynchronous tasks and created API contracts with frontend team to optimize integration. Established CI/CD pipelines with Docker and GitHub Actions, enabling automated deployments to staging and production.

Education

Master's degree in Computer Science at Waseda University
September 1, 2020 - September 1, 2025
Master’s degree in Computer Science at University
September 20, 2020 - September 20, 2025
Bachelor’s degree in Computer Science at University
January 11, 2030 - November 2, 2025

Qualifications

Bachelor's degree in Computer Science
January 11, 2030 - October 27, 2025
Master’s degree in Computer Science
January 11, 2030 - November 2, 2025
Bachelor’s degree in Computer Science
January 11, 2030 - November 2, 2025

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Computers & Electronics, Retail, Transportation & Logistics