Vlad

Vladyslav Nadelniuk
Summary
Backend (PHP) developer with over 8+ years of hands-on experience in designing and building big data pipeline, microservice architectures, and
RESTful APIs. I specialize in working with Symfony, Laravel, DB performance optimization (PostgreSQL, MySQL, MongoDB, Redis), as well as
automating CI/CD processes and observability infrastructure. I have a deep understanding of SOLID, Clean Architecture, DDD, CQRS principles, and
am focused on creating reliable and scalable business solutions. Complete career history on LinkedIn

Contacts Experience

Email: [open contact info](look above in the "contact info" section) NDA
Phone: [open contact info](look above in the "contact info" section) Full Stack Developer 09/2025 - Present
Telegram: @fanatov37
- Developed a scalable RESTful API for mobile devices
Location: Kyiv - Optimized database performance and query efficiency using in-memory caching and indexing
LinkedIn strategies
Git Hub - Legacy application refactoring with DDD and CQRS implementation for better separation of
responsibilities and enhanced support
Skills - Designed CI/CD processes based on GitHub Actions for continuous integration, implementing
automated test runs and mandatory static code analysis (PHPStan, PHP-CS-Fixer)
Backend - Provided observability of Docker infrastructure (30+ containers including microservices, servers, and
PHP Symfony Laravel databases) via Grafana, which reduced MTTR by 30%

Zend Framework RESTful API PHP 8.4 Laravel 11 Postgres 15 FrankenPHP MariaDB Redis Loki Traefik CI/CD Pipelines

OAuth2 JWT Swagger PHPStan Vue 3 React NuxtJS

PHP-CS-Fixer
Devo - Viral QR
Databases / Storage
Senior PHP Developer 10/2024 - 09/2025
PostgreSQL MySQL MariaDB
- Developed a scalable dynamic QR code routing service with zero-downtime support and efficient
MongoDB Redis Loki
caching to handle peak traffic spikes.
Prometheus Replication Partition - Designed and deployed an independent payment microservice (Payment Gateway), implementing
seamless integration with Stripe, Checkout.com, PayPal, Apple Pay, and Google Pay.
Architecture & Design
- Improved overall system performance by 25% by modernizing the core codebase, refactoring legacy
System Design Microservices DDD codebase, and optimizing complex SQL database queries.
CQRS Event-Driven - Built a robust testing process by implementing comprehensive unit and integration test coverage
(PHPUnit), as well as automated BDD scripts based on Behat.
Principles & Practices
- Mentored new developers, conducted regular codebase reviews, and standardized engineering
OOP SOLID KISS DRY YAGNI practices, which increased the overall quality of the team's codebase.
Code Review Design Patterns
PHP 8 Symfony 6.4 MySQL 8.4 Docker CI/CD Pipelines

DevOps / Tools
Docker Nginx FrankenPHP Boosta - Sitechecker (SaaS/B2B)
Traefik Git GitHub Actions Senior PHP Developer 02/2018 - 09/2024

CI/CD Pipelines RabbitMQ Git - Big Data: Designed a monthly Range-partitioning strategy for a 60 TB database, which allowed
optimizing complex sampling and deep historical data analytics (starting in 2018).
Vagrant
- Heavy Background Processing & High-Throughput: Developed an asynchronous background
Testing processing ecosystem on RabbitMQ consumers, which processed up to 300M records daily during
PHPUnit Integration Behat peak periods.
- NoSQl: Implemented MongoDB as an additional NoSQL - storage for storing text content of sites and
Monitoring performing analytics for 7 days, which unloaded the main DB and increased the throughput of query
Grafana ELK Stack execution by 40%.
Slack / Telegram Alerts - Event-Driven Microservices: System designed a microservices based on the Event-Driven approach
for asynchronous interaction between services, which provided loose coupling, high fault tolerance
Languages and flexible scaling of components.
English B1 Ukrainian native - System Telemetry: Implemented end-to-end infrastructure monitoring using ELK Stack
(Elasticsearch, Logstash, Kibana) and Grafana for proactive detection of bottlenecks.
- Ensured ecosystem stability in conditions of rapid scaling due to adherence to Clean Architecture,
Education
comprehensive unit test coverage (90% core coverage, 60% complex business logic) and regular
Master's Degree code reviews.
Kyiv International University of Finance - Managed architectural development and uninterrupted support of 3 related internal projects in
Sep 2015 - Jun 2017 Management parallel with support of the main product.
Master's Degree - Proxy & Web Scraping: Developed a proxy rotation microservice with a pool of 100k+ vendor IP
Kryvyi Rih National University addresses for data collection from search engines (Google, Bing, Yahoo), which ensured bypassing
Sep 2010 - Jun 2015 Software Engineering
limits (Rate Limiting) and stable Success Rate parsing.

PHP 7-8 Symfony 3.4-6.4 PostgreSQL 10-15 MongoDB Redis RabbitMQ Docker Kibana

Elasticsearch Grafana GitLab CI/CD