PHP Back-end Developer

About the Position

We are seeking a Senior PHP Back-end Developer with 8+ years of experience to join our team in Uzhhorod, Ukraine.

About Denys

Denys specializes in back-end development with a focus on PHP and its frameworks. With 8 years of experience, he has developed a robust proficiency in Symfony and Laravel, employing these tools to enhance application performance and user experience.

His expertise extends across several databases including MySQL, MariaDB, and Elasticsearch, as well as Docker for containerization. Denys has tackled complex challenges in e-commerce, fintech, and travel industries by optimizing APIs and implementing microservices architecture. His experience also includes implementing continuous integration practices to streamline deployment processes.

In addition to his technical skills, he employs quality assurance methodologies to ensure software reliability. Denys holds a Bachelor's degree in Software Engineering and is pursuing a Master's degree in Physics and Astronomy. This solid educational background complements his practical knowledge and enhances his problem-solving capabilities in diverse project environments.

Responsibilities

• Design and develop scalable back-end services using PHP and its frameworks.
• Optimize APIs and implement microservices architecture.
• Collaborate with cross-functional teams to ensure seamless integration and deployment.
• Implement continuous integration practices to streamline deployment processes.
• Ensure software reliability through quality assurance methodologies.

Requirements

Core Skills

• PHP: 8 yrs.
• MySQL: 8 yrs.
• Git: 8 yrs.
• MariaDB: 8 yrs.
• Laravel: 7.5 yrs.
• Symfony: 7.5 yrs.
• RabbitMQ: 7 yrs.
• REST API: 7 yrs.
• Continuous Integration: 7 yrs.
• Redis: 7 yrs.
• Docker: 7 yrs.

Secondary Skills

• Gherkin: 8 yrs.
• Behat: 8 yrs.
• Nginx: 8 yrs.
• PHPUnit: 7 yrs.
• PHPSpec: 7 yrs.
• Jenkins: 7 yrs.
• Memcached: 7 yrs.
• PostgreSQL: 7 yrs.
• SOAP: 6 yrs.
• Apache: 6 yrs.
• Amazon S3: 6 yrs.
• MongoDB: 6 yrs.
• Quality Assurance (QA): 5 yrs.
• Sonata: 4 yrs.
• Vue.js: 4 yrs.
• JavaScript: 4 yrs.
• Artificial intelligence (AI): 3 yrs.
• Google Cloud (GCP): 2 yrs.
• Python: 2 yrs.
• Claude Code: 2 yrs.
• Codex: 2 yrs.
• Cursor: 2 yrs.
• HIPAA: 1.5 yrs.
• Big Data: 1 yrs.

Experience

Astreya (Sep 2025 - May 2026)

Senior PHP Developer

About the Project

Astreya is a global IT managed services provider specializing in technology infrastructure, digital workplace solutions, and enterprise AI. Founded in 2001 in Silicon Valley (headquartered in San Jose, California), the company supports enterprise clients across more than 40 countries.

• Consumer Services
• Customer Support
• Cloud Computing

Responsibilities

Worked on an internal project for managing workers, PTOs, schedules, buildings/clusters/locations for support, tickets, etc. The main goal was to develop a Capacity Management system, based on Big Data, showing current demand/supply of technicians, forecast for 2 weeks, and throughput of previous weeks. Finished project, then Cognizant acquired Astreya and started reorganizing teams.

Skills & technologies

• PHP
• Symfony
• Python
• Google Cloud (GCP)
• Big Data
• Docker
• Codex
• Claude Code

GOST (Dec 2024 - June 2025)

Senior PHP Developer

About the Project

GOST is a Ukrainian e-commerce platform for building materials with region-specific pricing and stock management. Since delivery costs vary greatly depending on the factory’s location, GOST allows factories and distributors to list products with accurate regional availability and prices. Products are stored in GOST warehouses, and the platform handles order fulfillment. The service targets individual builders and construction companies, offering an efficient and transparent supply chain for building materials across Ukraine.

• E-commerce
• Construction

Responsibilities

• Led back-end development of the project from scratch as the main PHP developer in a small cross-functional team.
• Worked closely with the system architect to implement a custom DB schema and designed scalable, region-aware logic for product pricing and stock management.
• Built core modules including warehouse integration (Nova Poshta), order fulfillment, payment (LiqPay), and user roles for factories, distributors, and buyers.
• Coordinated with a part-time developer for support tasks and collaborated with a front-end team of three to ensure smooth API integration.
• Played a key role in launching a functional MVP tailored to the Ukrainian construction market.

Skills & technologies

• Laravel
• PostgreSQL
• Redis
• Docker
• AMQP
• PHPUnit
• Elasticsearch
• PHP
• REST API
• Claude Code

CreditOnline (Sep 2023 - Sep 2024)

PHP Back-end Developer

About the Project

Loan management SaaS in EU.

• Fintech
• Banking
• Credit and Lending

Responsibilities

Working on new features for the SaaS platform, bug fixes, etc.

Skills & technologies

• PHP
• PostgreSQL
• PHPUnit
• RabbitMQ

JetCamp (May 2021 - Sep 2023)

Team Lead / Senior PHP Developer

About the Project

The site is an aggregator of campsites from different EU booking suppliers (such as Booking.com, Airbnb.com, Ctoutvert, etc.).

• Tourism
• Travel

Responsibilities

Managing and working remotely with a direct team of 6 people, building aggregation logic, optimizing search speed, aggregation speed, "in-site" booking logic via API (REST, SOAP).

It helps to improve customer's UX, so he doesn't need to be redirected to booking supplier, and can go through the whole flow of booking directly on the JetCamp site.

Skills & technologies

• PHP
• Laravel
• MariaDB
• Elasticsearch
• Redis
• Docker
• REST API
• Nginx
• RabbitMQ

Vilpra LT (June 2021 - June 2023)

Senior PHP Developer

About the Project

UAB "Vilpra" is one of the largest companies in Lithuania.

• E-commerce

Responsibilities

System built on Sylius. Created a lot of features which Sylius does not support, such as products importing from third-party storage service. Lots of overriding Sylius for customer need, written custom plugin for maintenance. Migrated project to another server using Docker and GitLab CI. Search optimization, bug fixes.

Skills & technologies

• Symfony
• PHP
• Nginx
• Redis
• Elasticsearch
• Docker
• RabbitMQ
• PostgreSQL
• REST API
• Vue.js

G-Keep (Oct 2019 - July 2021)

Senior PHP Developer

About the Project

The cost of fuel and the lack of accuracy in vehicles prevent fleet managers from having accurate and optimized visibility of this load.
G-KEEP is first and foremost a connected assistant to track the fuel in the tank. We provide the user with proof that every litre of fuel purchased is a litre of fuel efficiently consumed. If this is not the case, we give him the tools to apply the necessary corrections.

• Transportation
• Machine Learning
• Automotive

Responsibilities

Working on the general logic of the Admin Panel for customers, with displaying all info about vehicles, sending notification for critical statuses, etc. Developed microservice decoder for UDP signal from hardware V3, which sends hashed info about speed/fuel level/coords, etc. of vehicle every couple of seconds. Worked on queue for communication between microservices.

Skills & technologies

• Symfony
• PHP
• MariaDB
• MongoDB
• Docker
• Elasticsearch
• Memcached
• REST API
• Nginx

Hub4Potential (Nov 2019 - Dec 2020)

Middle PHP Developer

About the Project

Hub4Potential is an E-Learn system for companies and employees, which is pointed to improve employees' skills based on their job title, skills, and desires.

• Healthcare
• HealthTech

Responsibilities

Working on the flow of tests and quizzes for learners, logic for teachers to manage lessons, courses, confirming or not tests grades of learners. Logic for generating courses list for learners based on their current and target skills.

Skills & technologies

• Symfony
• PHP
• Jenkins
• Docker
• PostgreSQL
• Elasticsearch
• AMQP
• REST API
• Nginx

FlowBuilder (Nov 2017 - Oct 2020)

Middle and Senior PHP Developer

About the Project

Flowbuilder is the project for Lead Generation. Affiliates are sending traffic to our landing pages, where we collect information about people using quizzes (questions are dynamic and based on previous answers + user info like age, gender), then sending collected info to the admin panel service, where they're saving to the main DB, filtering for different marketing campaigns, and distributing to third-party service to sell them.

• Marketing
• Advertising

Responsibilities

Working on logic for leads collecting, distribution, filtration, etc. Working on landing pages builder, quizzes builder, optimization for distribution process, and queues. Generating reports on different parameters such as PPL (price per lead), RPL (revenue per lead), clicks, conversions.

Skills & technologies

• Symfony
• PHP
• MySQL
• AMQP
• Redis
• Docker
• REST API
• Jenkins
• Nginx

Education

Uzhhorod National University

2015 - 2019

Bachelor's degree in Software Engineering

Uzhhorod National University

2023 - 2025

Master's degree in Physics and Astronomy