Олександр

Oleksandr Khomanets
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
Skills
Languages: TypeScript, JavaScript (ES6+), SQL, HTML5, CSS3
Backend & Frameworks: Node.js, NestJS, Express
Architecture & APIs: REST, GraphQL, WebSockets, System Design, Microservices, Performance Optimization
Databases & ORMs: PostgreSQL, MySQL, MSSQL, MongoDB, Redis, Prisma, TypeORM, MikroORM, Mongoose
Message Brokers: RabbitMQ, BullMQ
DevOps & CI/CD: Docker, Docker Compose, GitHub Actions
Cloud Platforms: AWS (Lambda, S3, RDS), Firebase, Supabase, Azure
Authentication & Security: JWT, OAuth2, Auth0, Passport.js
Tools & Testing: Jest, Swagger, Postman
Version Control: Git, GitHub, GitLab
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, decreasing
average query response time from 1.5s to under 200ms (an 85% improvement)
● 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 3+ disparate databases (infrastructure, schools,
etc.) using open-source geolocation tools, eliminating Google Maps API costs while maintaining sub-second search
latency
● Implemented real-time features using WebSockets, significantly enhancing system interactivity and user engagement
for live application updates
● Maintained high code reliability by writing comprehensive unit tests using Jest and ensuring smooth integration with
version control systems
Backend Engineer, NikCode – Berlin, Remote September 2023 – August 2025
● Rapidly consolidated 5+ fragmented microservices into a unified monolithic architecture using NestJS, accelerating the
Mini-app MVP launch by 3 weeks under tight business 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, utilizing Redis caching and optimized PostgreSQL indexing,
reducing data retrieval speeds by 45% for datasets exceeding 100,000 records
● Enhanced system reliability by refining complex data models with Prisma ORM, significantly improving database
performance and overall query efficiency
● Developed secure authentication workflows (including JWT and Role-Based Access Control) to protect user data and
manage diverse client platform permissions
Education
National Aerospace University "Kharkiv Aviation Institute" – Bachelor in Software Engineering June 2027
Khmelnytskyi Polytechnic College – Junior Bachelor in Software Engineering June 2024
Languages
English: B2
Ukrainian: Native