Олександр

Oleksandr Khomanets
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Skills
Languages: TypeScript, JavaScript (ES6+)
Backend & Frameworks: Node.js, NestJS, Express
Architecture & APIs: Microservices, RESTful APIs, WebSockets, System Design
Databases & ORMs: PostgreSQL, MySQL, MSSQL, MongoDB, Redis, Prisma, TypeORM, MikroORM, Mongoose
Message Brokers: RabbitMQ, BullMQ
Cloud, DevOps & Infra: Docker, Docker Compose, AWS (S3, RDS)
Tools & Testing: Git, Jest, Swagger, Postman
Languages
English: B2
Ukrainian: Native
Experience
Backend Engineer, IT INNOVATIONS – Kyiv, Hybrid​ August 2025 – Present
●​ Extracted monolithic cron-job logic into a standalone, scalable microservice, utilizing Redis for efficient data caching
and temporary storage
●​ Optimized several heavy database operations by rewriting complex MikroORM queries into raw SQL
●​ Conducted regular code reviews, ensuring adherence to clean code principles, system design standards, and optimal
TypeScript/NestJS practices
●​ Developed a map-based object search system aggregating data from multiple databases (infrastructure, schools, etc.)
using open-source geolocation tools instead of Google Maps API, with built-in search history
Backend Engineer, Insiders – Lviv, Remote​ Mar 2024 – Aug 2025
●​ Functioned as a core backend developer in a dynamic outstaff environment, rapidly adapting to diverse project
requirements and delivering scalable Node.js/TypeScript solutions
●​ Mentored and onboarded Trainee and Junior developers, conducting pair programming sessions and establishing best
practices for API design and code quality
●​ Implemented real-time features using WebSockets, enhancing user engagement and system interactivity for various
client projects
●​ Optimized cloud storage operations by isolating AWS S3 file handling into a dedicated microservice, improving overall
system maintainability
Backend Engineer, NikCode – Berlin, Remote​ Dec 2024 – Apr 2025
●​ Rapidly consolidated existing microservices into a unified monolithic architecture using NestJS to accelerate the
launch of a Mini-app MVP under tight deadlines
●​ Engineered complex, secure third-party Healthcare API integrations, implementing BullMQ for reliable background job
processing and data synchronization
●​ Ensured strict data compliance and security standards for sensitive healthcare data, utilizing Docker for consistent and
isolated deployment environments
●​ Integrated a scalable search solution within the monolith, optimizing data retrieval speeds for large datasets
Backend Engineer, RexSoft – Khmelnytskyi, Office​ Feb 2024 – Oct 2024
●​ Built and optimized scalable RESTful API endpoints using Node.js, NestJS, and TypeScript for an interactive educational
platform
●​ Enhanced system reliability by refining data models with Prisma ORM, improving database performance and query
efficiency
●​ Collaborated with cross-functional teams and frontend developers using Git and Swagger for seamless API
documentation and version control
Backend Engineer, ProSearch – Khmelnytskyi, Remote​ Sep 2023 – Feb 2024
●​ Contributed to the design and development of core backend services using Nest.js and TypeORM
●​ Integrated AWS S3 and AWS RDS to establish efficient, secure file storage and relational data management processes
●​ Developed secure authentication workflows and wrote comprehensive unit tests using Jest to ensure code reliability
and protect user data
Education
National Aerospace University "Kharkiv Aviation Institute" – Bachelor in Software Engineering​ June 2027
Khmelnytskyi Polytechnic College – Junior Bachelor in Software Engineering​ June 2024