Denys

PHP Developer, Tech Lead
Denis Zbitnev, telegram: @exxolot, email: [открыть контакты](см. выше в блоке «контактная информация»)​
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Experienced PHP Developer with 15+ years of hands-on experience in designing and
scaling web applications. Expert in Laravel and Symfony ecosystems, with a deep
understanding of AWS infrastructure and high-load systems. Proven track record of building
complex platforms from scratch and maintaining large-scale legacy systems (Zend, Yii2,
Symfony 1-2). I am looking for a Senior/Individual Contributor role to focus on technical
challenges, code quality, and system architecture.​

Education
Master’s degree in Aviation Engineering Academy(Flight Control and Navigation Systems)​

Languages
PHP (5-8), C, JavaScript​

PHP/JS Frameworks
Laravel 5-12, Symfony 1-7, Zend Framework 1, Codeigniter, Kohana,
Vue.js, Angular1, jQuery, ExtJs​

DBMS
MySQL, PostgreSQL(Postgis), Redis, Memcached

Cloud services
AWS Services: Cognito(signin, signup, 2FA, federated signin, OAuth) , EC2, RDS, SES,
S3, Cloudwatch, SQS, Beanstalkd​

Search engines
Sphinx (fuzzy search), Elastic Search, Apache Lucene
​
Virtualization
Docker (swarm), Kubernetes, Vagrant​

Web servers
Nginx, Apache​

Brokers, queue servers
RabbitMQ, ZeroMQ, Redis​

Template engines
Blade, Twig, Smarty​

Payments Systems
Stripe, tripleA, others​

Other
JWT, OpenAPI3, Swagger, Postman, Facebook Marketing API, Firebase Notifications,
ReactPHP, Websockets, Comet​
​
Current Company
(October 2024 - current)​
Description: -​
Role: Team Lead
Responsibilities: ​
Maintaining and scaling a business-critical system based on Yii2 and PostgreSQL.
Refactored legacy modules to improve performance and reduce technical debt.
Optimized complex SQL queries, significantly reducing database load during peak hours.
Leading technical decisions for a team of 5 while remaining the primary code contributor.
​
Team Size: 5 members
Tools & Technologies: Yii2, postgresql​
​
Fraudfinder, BSG
(international, June 2022 - October 2024)​
Project 1:
Description: mass test application​
Role: Tech Lead, Architect
Responsibilities: building a system from scratch
Team Size: 6 members
Tools & Technologies: Laravel, mysql, websockets, websockify, remote frame buffers​
​
Project 2:
Description: Global Communication Platform​
Role: Php Core Developer
Responsibilities: Implementing new features, enhancing platform functionality
Team Size: 3 members
Tools & Technologies: NDA​

Growth Engineering
(UK, June 2021 - March 2022)
Description: Learning technology that uses the power of brain science and
learner engagement to improve employee, customer, and partner performance
by as much as 75%.
Role: Senior Php Developer
Responsibilities: Implementing cross services API based communication, enhancing
platform functionality
Team Size: 7 members
Tools & Technologies: AWS Services, Laravel, MySQL
​
Cryptocurrency online bank services
(Ireland/ Canada, October 2020 – March 2021)​
Description: Cryptocurrency online bank services, converters, charts
Role: Team/Tech Lead
Responsibilities: Manage the team's day-to-day activities, code review, and delegate
tasks to team members. Deployment, writing the most important features
Team Size: 7 members
Tools & Technologies: AWS Services, Laravel, MySQL​
​
master-pos.com
(US/Israel, September 2019 – April 2020, interrupted because of
COVID-19)​
Description: The MasterPOS application transforms your Apple or Android device into a
point of sale with an internal credit card reader. Offering ease of use, the most robust point
of sale, and live dashboard.
Role: Senior(single) full-stack developer
Responsibilities: Writing a new version (API based) of the application from scratch using
Laravel framework(API) and Vue.js (Vuetify)
Team Size: 1 member (fullstack)
Tools & Technologies: PHP, Laravel, MySQL, OpenAPI3, vue.js, vuetify, Docker
​
zalyshky.ua
(Nov 2017 – July 2019)​
Description: Online platform created to provide services, including an intermediary, for the
purchase, sale of agricultural products, goods, services. The Internet platform provides an
opportunity for all interested persons in the sale or purchase of agricultural products to
place their application on the site and participate in online trading, regardless of the form of
management of the participants, which promotes the development of economic relations in
the agrarian sector among small and medium enterprises.
Role: Senior full-stack developer
Responsibilities: Managing all phases of application design - from prototyping and coding
through system testing, integration, and deployment
Team Size: 1 member
Tools & Technologies: PHP, symfony, websockets, bootstrap, MySQL, SMS
authentication, heavily usage of SMS API(https://turbosms.ua/), for notifications of different
kind, jQuery​

edusson.com
(USA, July 2016 - Sep 2017)​
Description: Online service providing Personalized Essay Writing Suggestions
Role: PHP Software Engineer
Responsibilities: Creation and customization of Symfony IP Telephony Bundle with the ability
to make outbound, inbound calls, call redirection
Team Size: 6 team members
Tools & Technologies: PHP, Symfony, http://socketo.me/ (websockets), Reactphp
https://www.twilio.com/ (API), jQuery​

gttb.com
(USA, Aug 2015 - Aug 2016)​
Description: Intranet solution that prevents sensitive data loss (file or data streams) from
within the network, at the endpoint, in the cloud and everywhere in between.
Role: PHP Software Engineer
Responsibilities: Developing and customizing web interfaces
Team Size: 10 team members
Tools & Technologies: PHP, Symfony1, extjs, postgresql, jQuery ​
​
Essayshark
PHP Software Engineer (USA, March 2013 - Aug 2015)​
Description: EssayShark.com is a unique online academic assistance service. Site visitors
communicate with customers directly in chat and customers assign orders to visitors
based on their rating, bid per page, and ability to advertise their academic skills.
Role: PHP Engineer
Responsibilities: Rewriting some essential parts Refactoring Optimization Analytical
subsystem support
Team Size: 3 team members Tools & Technologies: PHP, MySQL, Comet Servers (nginx-
pushstream module, realplexor), jQuery​
​
kgk-global.com/en
(international, June 2010 - July 2013)​
Description: Design and engineering company, has been a leading developer and
manufacturer of a professional Fleet Managing System called GLOBAL. Logistics
Management Online vehicle tracking.
Role: PHP Developer
Responsibilities: Developing and customizing web interfaces
Team Size: 5 team members
Tools & Technologies: PHP, leaflet, mysql, jQuery
​
Center of Information and Computer Technologies
(Ukraine, Aug 2008 - Aug 2010)​
intranet web statistics system
Description: Realtime web statistics system with different reports(text, charts) that can be
viewed in a table and graphic form
Role: PHP Engineer
Responsibilities: Create and maintain a real-time web statistics system for local usage
Team Size: 1 member
Tools & Technologies: PHP, Redis, mysql, C, hiredis
(https://github.com/redis/hiredis), http:// users.fred.net/brv/chart/, libmysql, jQuery