Sergey

Moroz Sergey
FullStackDeveloper
Ukraine, Dnipro
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Full Stack Developer with 5+ years of commercial experience in web development, including 3+
years focused on Laravel. Experienced in building and maintaining SaaS, ERP, CRM, e-
commerce, and warehouse management systems.

Strong background in REST APIs, third-party integrations, backend architecture, and database-
driven applications. Focused on clean, maintainable code using OOP, SOLID principles, design
patterns, and modern PHP practices.

Hands-on experience with MySQL, RabbitMQ, Docker, AWS, and Vue.js. Familiar with
concurrency, locking, race conditions, and event-driven architecture. Use AI-assisted
development tools, including OpenAI Codex and Claude Code, for codebase analysis,
implementation, refactoring, debugging, and code review.

EXPERIENCE

ShipRelay | 2024-2026
FullStackDeveloper - Laravel + Vue

• Developed and maintained warehouse management and order synchronization systems
using Laravel and Vue.js
• Developed warehouse management interfaces and internal tools using Vue.js
• Built and maintained REST API integrations with external services
• Integrated Shopify with Extensiv for automated order synchronization
• Maintained and extended Stripe payment integration
• Integrated multiple shipping providers and aggregators, including ShipEngine, Vesyl,
EasyPost, Vanlo, DHL, Fedex, NullShip, Gori, P2PG, YSP, and USPS
• Implemented business logic for shipping rate comparison and automatic selection of
optimal delivery services
• Implemented asynchronous order processing with RabbitMQ, including retries and failure
handling for external service integrations
• Implemented idempotent synchronization mechanisms to prevent duplicate order
processing
• Designed and optimized MySQL queries and database structures for order and warehouse
work ows
• Implemented multitenant architecture with tenant-level data isolation
• Investigated and resolved production issues across order, payment, and shipping work ows
• Used AI-assisted development tools such as OpenAI Codex and Claude Code for codebase
analysis, implementation planning, refactoring, debugging, and code review
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ArtPix3D | 2020–2024
FullStackDeveloper - Laravel + React

• Developed and maintained custom ERP/CRM functionality
• Designed and implemented backend functionality and REST API integrations
• Integrated Amazon Marketplace for order synchronization
• Integrated third-party services including TaxJar, Mailchimp, Loox, ShipStation, Zendesk, and
others
• Maintained and extended existing Laravel applications and business logic
• Worked with React-based frontend applications

Ardas | 2018–2020
PHP Developer - Symfony + Laravel

• Participated in migration of a legacy trading platform to Symfony
• Developed new backend functionality
• Maintained and refactored existing PHP code
• Worked with relational databases and application business logic

TECHNICAL SKILLS

Backend: PHP 8, Laravel, Symfony, REST API, GraphQL
Databases: MySQL, MongoDB (basic), PostgreSQL (basic)
Frontend: JavaScript, Vue.js, React, Angular, jQuery
Engineering Principles: OOP, SOLID, DRY, KISS, YAGNI
Architecture & Patterns: MVC, Design Patterns, DDD fundamentals, Multitenancy
Concurrency & Distributed Systems: Race Conditions, Pessimistic/Optimistic Locking,
Distributed Locks, Idempotency, Event-Driven Architecture
Messaging: RabbitMQ, WebSockets(Pusher)
Testing: PHPUnit, Pest
Infrastructure & Tools: Git, Docker, Composer, AWS S3, AWS EC2
AI-assisted Development: OpenAI Codex, Claude Code - codebase analysis, implementation,
refactoring, debugging, code review

LANGUAGES

English - A2 (technical documentation, written communication, development tools)
Ukrainian - Native
Russian - Native