Сергей

Hameljak Serhij
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
BACK-END (PHP/ PYTHON) DEVELOPER

SKILLS

Programming Languages
● PHP 8+
● Python

Frameworks
● Yii2
● Laravel
● Symfony
● Django

Databases
● MySql
● PostgreSQL
● MongoDB
● ElasticSearch
● ActiveRecord

Testing
● Unit Tests
● Functionals
● Selenium

Other Skills
● OOP
● Microservices Architecture
● Dynamic Content
● RabbitMQ Workers
● CI automation
● Git

LANGUAGES

Ukrainian (native)
English (intermediate)
Polish (intermediate)

EXPERIENCE

LionWood — PHP Developer

MARCH 2025 - PRESENT

SECL Group — Back-end (PHP/ Python) Developer
JULY 2020 - DECEMBER 2024

TemplateMonster— Back-end Developer
MARCH 2019 - JULY 2020

Yelbee — PHP Developer, Team Leader
MARCH 2018 - MARCH 2019

2Event.com — PHP YII 2 Full-Stack Developer
OCTOBER 2016 - FEBRUARY 2018

Freelance — PHP Developer
MARCH 2012 - AUGUST 2016

Responsibilities:
● Support the full-life cycle of sites using PHP
● Designing parsers for online work
● Database development, rationing and optimization
● Organization of site administration

EDUCATION

Ternopil Ivan Puluj National Technical University, Ukraine — Bachelor’s Degree
2006 - 2010

Computer Information Systems and Software Engineering

PROJECTS

LionWoood
Sunland March 2024 - now

Overview: Sunland is a Danish digital solutions and software development company delivering custom
web applications, e-commerce platforms, CRM solutions, and business process automation for
international clients. The company develops scalable digital products and integrations using modern
web technologies, with a strong focus on user experience, performance, and operational efficiency.

Role: PHP Developer

Main project tasks:

● Develop, maintain, and support backend applications using PHP, Symfony, and
MySQL/PostgreSQL.

● Investigate and resolve production issues, bugs, and performance problems across existing
systems.
● Develop and maintain REST APIs and third-party integrations with e-commerce, ERP, logistics,
and external services.
● Work with legacy codebases, refactoring and improving existing functionality while maintaining
system stability.
● Design and optimize SQL queries, database structures, indexes, and data processing
workflows.
● Implement new business functionality and modify existing modules based on business
requirements.
● Develop background processes, scheduled jobs, data imports/exports, and automated
workflows.
● Integrate and maintain Magento, Shopify, and other external platforms and services.
● Perform code reviews, debugging, testing, and deployment of backend changes.

Project team size: 3 people

Technologies: PHP, Symphony, .NET

SECL Group

Logistics service November 2023 - December 2024

Overview: Admin portal for maintaining and operating a high-voltage grid stretching

Role: PHP Developer

Main project tasks:
● Developing the back end
● Code review
● Leading the team of back-end developers

Project team size: 3 people

Technologies: Angular, PHP, Symphony, rxJs, TypeScript

Tenzing Partners February 2023 - November 2023

Overview: Platform for Luxembourg-based M&A boutique to manage the process of selling a company.
The platform is used by the company's owners and potential buyers. It features the ability to create your
own company profile, create sell and buy requests and help users negotiate the terms of the deal. Also,
potentially it will feature a custom admin website and parsing from numerous European databases.

Role: Python Developer

Main project tasks:
● Developing the back end
● Code review
● Leading the team of back-end developers

Project team size: 8 people

Technologies: Python/Django, DRF, PostgreSQL, Docker, Celery, JWT, Elastic

GymScope February 2022 - February 2023

Overview: Online portal to find and join fitness centers in the user's local area. Its mission is to
conveniently connect people with gyms & fitness studios. There are different categories, searching
pages with complicated filters, and pages to compare fitness centers and gyms.

Role: Back-End Developer, Team Leader

Main project tasks:
● Developing the back end
● Code review
● Leading the team of back-end developers

Project team size: 2 people

Technologies: Yii2, PHP, HTML5, CSS3, VueJS, JavaScript, jQuery, Python, Django

KIA DMS August 2020 - March 2022

Overview: The functionality of the system includes automatization of the process of collecting data of
customers and their activities from the dealer network. It also provides management of received data
and the interface for working with that. The system affects the work of the sales, service and marketing
departments.

Role: PHP Developer, Back-End Team Leader

Main project tasks:
● Developing the back end
● Support of microservices
● Code review
● Leading the team of back-end developers

Project team size: 10 people

Technologies: Yii2, MySQL 5.6, PHP 7.2, CSS3, VueJS, JavaScript, jQuery

TemplateMonster March 2019 - July 2020

Overview: TemplateMonster is a leading player on the web design market that’s providing thousands of its
templates of different types to the audience from all around the world. In addition to static HTML and Flash
templates, it also provides website templates for all major CMS and eCommerce platforms (such as WordPress,
Joomla, Magento, osCommerce, Drupal, etc.).

Role: Back-End Developer

Main project tasks:
● Development and design with Yii2
● Support for microservices
● Development of the administration panel

Technologies: PHP, Yii2, microservices

Yelbee.com March 2018 - March 2019

Overview: Yellbee is an online hub with tours from various tour operators. Here you can compare prices from
different suppliers and book tours online without leaving home. All the documents you need for the trip will be
sent to you by email. They are also stored in the personal account of Yellbee.

Role: PHP Developer, Team Leader

Main project tasks:
● Database architect
● Development and designing with Laravel
● Project administrator on GIT
● Head of the company's software department

Technologies: PHP, Laravel

2Event.com October 2016 - February 2018

Overview: 2Event - website and mobile application for visitors and event organizers, where key functions are
collected:
● poster and tickets’ purchase to the events with the minimum service fee from 2,5%
● acquaintance between visitors before the event
● travel mates and roommates’ search

Role: PHP Developer, Team Leader

Main project tasks:
● Development and designing using PHP, Yii2

Project team size: 4 people

Technologies: PHP, Yii2