Vadim

Vadim Lyadskiy
[open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section)

Backend Developer

Backend Engineer with 10+ years of experience in backend and full-stack development, specializing in PHP
(Symfony) and scalable system architecture. Experienced with event-driven systems, REST API
development, background job processing, queues RabbitMQ, and system performance tuning.
Experienced in building business platforms in e-commerce domain. Focused on clean architecture, SOLID
principles, design patterns, and high-quality code.

WORK EXPERIENCE

AbsoluteWeb 08/2016 - Present
PHP Backend developer
• Conducted profiling and performance optimization to improve scalability and speed.
• Optimized MySQL queries, indexes, schema design, and reduced API response times through profiling
(Blackfire/Xdebug)
• Created reusable Symfony components, reducing development time across 5+ projects.
• Developed a standalone Symfony based application to handle background processing and external
system integrations, then connected them to Magento through REST/GraphQL APIs and message
queues.
• Built lightweight Symfony microservices to handle tasks such as product synchronization, order exports,
and external API integrations, then connected them to Magento through REST APIs and queues.
• Developed backend functionality using PHP 7/8 with strong focus on Symfony architecture: DI, services,
event system, routing, DTOs, reusable domain logic.
• Investigated and tuned MySQL performance issues.
• Led end-to-end backend development lifecycle: architecture design, task decomposition, technical
decision-making.
• Optimized system performance at application and database levels (MySQL/PostgreSQL), reducing
infrastructure costs by 15%.
• Led investigation and resolution of complex production issues, performance bottlenecks, and security
vulnerabilities.
• Authored and maintained technical documentation for architecture decisions and critical system
components.
• Led refactoring of legacy Laravel codebases to improve testability, performance, and maintainability.
• Designed and implemented microservice architecture for product sync, order exports, and external
system integrations (ERP, SAND, SAP, internal APIs).
• Built a module reused across 5+ projects, saving the team hours each sprint.
• Cut hosting costs by 15% through server tuning and caching.
• Consulted clients to improve user experience and align technical solutions with business goals.
Webinse 11/2015 - 07/2016
Software Engineer
• Developed Symfony-based data migration modules to import and synchronize data from external APIs
• Decreased production errors by 25% after refactoring 3rd party modules.
• Maintained and optimized e-commerce websites on Magento 1.
• Developed custom themes designed to meet business requirements.
• Led a smooth transition of large datasets between legacy systems and Laravel-based applications.
PUBLICATIONS

Magento setup:upgrade stuck? Watch out for metadata locks! 07/2025
[open contact info](look above in the "contact info" section)
lyadsky-9yamf

SKILLS

Technical Skills: Apache, AWS, Blackfire, CI/​CD ​pipelines, Cloudflare, Cloudflare ​Workers, Datadog, DDD,
Docker, Elasticsearch, ERP ​integrations, Fastly, Git, GraphQl, JavaScript ​(​ES6+​)​, Laravel, Magento ​2, MariaDB,
MongoDB, MySQL, New ​Relic, Nexcess, Nginx, OpenAPI, OpenSearch, performance ​profiling, PHP ​(​7.​x/​8.​x)​, PHP-​
FPM, PHPUnit, PostgreSQL, RabbitMQ, Redis, REST ​APIs, SOLID, Symfony, TypeScript, Varnish, Xdebug
Languages: English ​-​​Upper-​Intermediate, Ukrainian ​-​​Fluent

Soft Skills: Mentoring ​junior ​developers,​​code ​review ​&​​quality ​control,​​decision ​making ​based ​on ​technical ​
and ​business ​priorities,​​strong ​debugging ​and ​analytical ​skills,​​quickly ​adapting ​to ​new ​technologies