Vitalii

Vitalii Klymenko
Krefeld, 47800 Germany • [відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація») • [відкрити контакти](див. вище в блоці «контактна інформація») n/vij-klymenko/, https://github.com/vijKlim
Senior Full-Stack / Backend Developer (PHP / Symfony / JavaScript / TypeScript)

SUMMARY

Full-Stack / Backend Developer with 13+ years of experience building web applications and business-critical systems using PHP
(Symfony, Laravel, Yii2) and modern frontend technologies (JavaScript, TypeScript, Vue.js, React).

Strong experience in REST APIs, third-party integrations, and billing/subscription systems. Background includes e-commerce platforms,
marketplaces, and CRM/BPM solutions.

Focused on delivering scalable and maintainable solutions the full stack.

EXPERIENCE

Mar 2022 - Apr 2026 Senior Backend Engineer (PHP / Symfony)

Origindata | Paris, France

Designed and developed backend services for a global mobile commerce platform serving
millions of users. Owned features end-to-end: from technical design and estimation to
implementation, deployment, and production support. Built and optimized performance-
critical APIs, database queries, and caching layers to ensure reliability under high traffic.
Worked with distributed systems involving billing, subscriptions, and external providers.
Interfaced with queue-based services written in Java and AI-related services implemented in
Python. Collaborated closely with DevOps on Dockerized deployments, CI/CD pipelines, and
production stability.
May 2019 - Feb 2022 Team Lead PHP Developer

Tatet GmbH | Kyiv, Ukraine

Led development of a CRM platform as Team Lead, owning backend architecture and technical
direction of the product. Designed and implemented backend solutions using PHP (Yii2,
Laravel), focusing on scalability, maintainability, and performance. Oversaw development,
maintenance, and technical quality of the entire system, including code reviews and
architectural decisions. Collaborated with frontend developers working with Vue.js and
Knockout.js to deliver end-to-end features. Coordinated deployments and infrastructure tasks,
working with AWS-based environments and containerized services. Mentored and managed a
development team, ensuring delivery, code quality, and knowledge sharing.
Feb 2015 - May 2019 PHP Developer

Tatet GmbH | Kyiv, Ukraine

Developed and maintained an online store platform using PHP (Yii2, Laravel) and JavaScript-
based frontend solutions. Refactored and optimized legacy backend modules to improve
performance and maintainability. Implemented new features and modules across backend and
frontend layers (PHP, JavaScript). Integrated the platform with external e-commerce and ERP
systems. Worked closely with frontend technologies including Vue.js and Knockout.js to
support dynamic user interfaces.
Aug 2012 - Feb 2014 Web Software Developer / System Administrator

STDIAMOND GmbH | Kyiv, Ukraine

Developed internal web applications and supported IT infrastructure for business-critical
systems. Administered Linux servers, networks, and production environments, ensuring
system stability and availability. Handled deployments, monitoring, backups, and incident
troubleshooting. Provided technical support for internal systems and infrastructure.
Sep 2010 - May 2012 Web Developer with SEO focus

Freelancer | Kyiv, Ukraine

Developed and maintained client websites using modern CMS platforms. Worked on server
setup, hosting, and basic system administration.

EDUCATION

Sep 2010 - Mar 2013 Bachelor's degree in Management

European Institute | Kyiv, Ukraine
Sep 2001 - Jul 2005 Technical Education (Marine Engineering & Energy Systems)

Kyiv Vocational College of Maritime and River Transport and Technology | Kyiv, Ukraine

SKILLS

PHP (Symfony, Laravel, Yii2) | REST APIs | High-Load Systems | MySQL, PostgreSQL | Redis | Docker | Kubernetes | AWS |
CI/CD (GitLab) | JavaScript / TypeScript | Vue.js, React, Angular | Python (AI services integration) | Java (queue-based
services) | PHPUnit | Linux

LANGUAGES

ENGLISH Advanced
GERMAN Intermediate Zertifikat B1
UKRAINIAN Native