Сергей

Sergey Levchenko
[open contact info](look above in the "contact info" section)
Fullstack PHP Developer

Fullstack PHP Developer with 10+ years of experience in web application development,
focusing on backend architecture, scalability, and microservices. Proficient in PHP 8+, Symfony,
Laravel, MySQL optimization, Docker, Redis, RabbitMQ, ElasticSearch, and integrations with
third-party services. Experienced in transitioning monolithic systems to microservices and
ensuring high code quality through testing and releases.

Work experience

1) Arbostar (2023 – 2026)

Developed and maintained CRM software for the tree-care industry. Implemented new features,
optimized backend logic, and ensured scalability.

Stack: Laravel, MySQL, Redis, RabbitMQ, ElasticSearch, Kubernetes, AWS.

2) RVA FinTech Solutions (2022 – 2023)

Built and enhanced ntech products, adding features, integrating services, and focusing on
code quality and releases.

Stack: Laravel, MySQL.

3) Unipost (2020 – 2021)

Created CRM ful llment service from scratch as a fullstack developer, handling warehouse
management and package delivery integrations with services like Nova Poshta. Transitioned to
microservices architecture, optimized MySQL queries, and ensured reliable inter-service
communication.

Stack: Symfony 5, Vue, Redis, RabbitMQ, Doctrine, Docker, Golang.

4) Investors Observer (2018 – 2020)

Implemented features and maintained Symfony/Angular applications using microservices.
Focused on backend scalability, database optimization (Postgres, MongoDB), search
functionality, and containerization.

Stack: Symfony, Angular, Redis, ElasticSearch, MongoDB, Docker, Postgres
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5) Higher Media (2012 – 2018)

Developed CRM and SaaS applications for landing pages and educational sites. Handled
backend architecture, integrations, and performance optimization.

Stack: CodeIgniter, Zend, WordPress, Drupal, Redis, Node.js.

6) W3Ukraine (2008 – 2012)

Built PHP-based websites, capturing requirements, ensuring compliance, and collaborating with
teams.

Stack: jQuery, WordPress, Drupal, CakePHP.

Skills
Programming Languages/Technologies:

PHP (15 years) – Expertise in PHP 8+, OOP, design patterns.
JavaScript/Node.js (10+ years).
Go (1 year).

Databases:

MySQL – Query optimization, data structures, indexing.
Postgres, MongoDB.

PHP Frameworks:

Symfony (5 years) – Including Symfony 6+.
Laravel (5 years).
CodeIgniter (7 years), CakePHP (7 years).

Frontend:

Vue (2 years), React (1 year), Angular (2 years), jQuery (10 years).

Infrastructure & Tools:

Docker (experienced in containerization).
Redis (3 years), RabbitMQ (3 years), ElasticSearch (2 years).
AWS (3 years).
Understanding of microservices architecture, service interactions, and third-party integrations.
Plus: Experience with Kubernetes (k8s) basics, CI/CD pipelines.

English: b1-b2

Location

Ukraine

Past Projects
1) Unipost unipost.ua

Order ful illment for online stores platform based on Symfony 5 and Vue.
Year 2020

Role: Fullstack. Creation application from scratch
Stack: Symfony, Vue

2) MyMyCars mymycars.com

Selling used cars application.

Role: Fullstack. Application support and new features implementation
Stack: Symfony, Vue

3) SoundHills soundhills.com

Multi users platform for selling audio licenses based on Symfony 3 and Bootstrap 3
Year 2019

Role: Fullstack

4) Sentecingstats sentencingstats.com

WordPress based website for US lawyers, judges etc. Displaying criminal statistics data for last
30 years.
Year 2018

Role: Implementation website structure, integration payment, mail chimp, creation charts using
f
 d3.js library.

5) CANAL+ iOS app
Location:
https://itunes.apple.com/fr/app/mycanal-la-tv-by-canal-en-direct-et-replay/id694580816?
mt=8

Description:
iOS/IPad application for watching CANAL+ tv channels and subscription functionality

Role:
Database, front-end and back-end architecture planning and implementation. iPad version
development.