Владислав

VLADYSLAV OMELYANENKO
Full Stack Engineer (PHP / JavaScript)
Uzhhorod, Ukraine | [open contact info](look above in the "contact info" section) | LinkedIn | GitHub | Telegram

SUMMARY
Full Stack Engineer (PHP/JavaScript) with 4+ years of experience designing and scaling high-load backend services. Take
end-to-end ownership of features - from architecture and third-party API integration to production deployment. Focused on
performance optimization (query tuning, caching, service-oriented architecture) and building reliable systems that reduce
operational load on support and infrastructure teams.

EXPERIENCE

Full Stack Engineer - Meest
02/2023 - Present | Remote
Own 3 services end-to-end that integrate with Meest's core systems via REST API and message queue, from architecture
through production deployment.
Shipment Management System
• Analyzed slow queries with EXPLAIN, added composite indexes on critical columns, and implemented eager loading
to eliminate N+1 problems - reducing response time by 40%.
• Introduced Service Layer and Repository Pattern to separate business logic from data access, and added DTOs for
typed data handling in complex operations.
• Built a caching layer with TTL strategy for third-party API responses (Vchasno, NBU, YouControl), cutting external
service load and improving reliability.
• Integrated Google reCAPTCHA v3 and rate limiting for bot/brute-force protection, with centralized SMS/call logging
for anomaly detection.
Meest Maps - Geolocation Branch Search Service
• Independently designed and built a branch search service from scratch using Yii2 and React, integrated into the Meest
mobile app for end-user branch search.
• Implemented Elasticsearch for fast full-text branch search with parameter-based filtering.
• Built automatic user location detection and distance calculation to branches via the Google Maps API, with geodata
caching to reduce external API requests.
• Reduced customer support load by giving end users a fast, self-service way to redirect shipments arriving from abroad
to a chosen branch.
Additional Responsibilities
• Conduct code reviews and refactor legacy code to modern standards.
• Participate in technical interviews, candidate evaluation, and project complexity/risk assessments.
Technologies: PHP, Laravel, Yii2, React, TypeScript, Next.js, RTK, Zustand, MUI, PostgreSQL, Redis, RabbitMQ, Docker, GitLab
CI/CD, Elasticsearch, Google Maps API

Full Stack Engineer - ABRouter
10/2021 - 12/2022 | Remote
A/B Testing Platform (MVP)
• Built an MVP statistics collection and analysis system for A/B experiments with feature-flag support, used to run
experiments for company clients and the company's mail proxy service.
• Introduced automated testing with Codeception, catching bugs earlier in development and reducing the number of
production issues.
• Used Docker to maintain a consistent environment between development and production.
Technologies: Laravel, React, jQuery, Chart.js, MySQL, Docker, Codeception

TECH STACK

Backend: PHP, Laravel, Yii2, RabbitMQ
Databases & Search: PostgreSQL, MySQL, Redis, Elasticsearch
Frontend: React, TypeScript, Next.js, Redux Toolkit, Zustand, MUI, jQuery
Infrastructure: Docker, GitLab CI/CD, Nginx
Tools: Google Maps API, Codeception
Architecture Patterns: Repository, Service Layer, DTO, Event-Driven Architecture

EDUCATION
National University of Civil Defence of Ukraine, Kharkiv
Bachelor's Degree, Engineering - 2015-2019

LANGUAGES
Ukrainian: Native
English: B1