Conovaloff Constantin
Male, born on 15 April 1989, 33 years
Expected position and salary
Tech Lead / Senior Backend Developer
PHP / Golang / Full-Stack Development
5 000
USD per month
About me
Huge amount of experience (10+ years) with PHP and highly loaded systems.
I focused on results and take the initiative to resolve problems and discuss the tasks.

- Create architecture for high-load projects (sets: Sharding. Caching. Rate limits)
- Create zero incident processes (sets: Monitoring. Alerting. Auto-testing)
- Manage team (Hiring new employees, Negotiation about tasks, requirements and deadlines)
- Manage processes (SAFe architect. SCRUM master)
- Write secure code (double check code for: XSS. CSRF. SQL injections. Race condition)

My favorite languages:
- PHP (Expert)
- Golang (Advanced)
- JavaScript (Advanced)
- Python (Advanced)

My favorite databases: MySQL / PostgreSQL / Redis / MongoDB / ElasticSearch / ClickHouse
My favorite frameworks: Laravel, Symfony

SCRUM - Professional Scrum Developer
Scaled Agile Framework - SAFe 6 Architect
INTUIT national open university - Linux Network

Work experience — 12 years
Jun 2022 — present
Xsolla — Software Architect / Senior Backend Developer in Payment Integration Department
Xsolla is one of worldwide leaders in provide payment services and gateway for video games.

My responsibilities:
- Analysis of business issues to create an implementation plan and decomposition of the epic-task for sub-tasks.
- Quarterly planning tasks for the team.
- Conducting the implementation of a business task (monitoring the progress of its implementation + discussing about appeared difficulties and helping to eliminate them + responsobility to completiy managing for the task on time).
- Preparing and presentation progress of work to the management team every sprint.
- Conducting weekly training for the programming team.
- Conduct tech interview for hiring.
- Prioritising and maintaining a backlog of tasks.
- Researching speed problems, creating solutions and improving system
- Create and maintenance the interactions of outside payment system
Jan 2022 — Jun 2022
Idealyst NFT — Chief Developer
Idealyst is a PayToEarn NFT game

My responsibilities:
- Game development with Unity and GameMaker
- FullStack development of the website
- Writing Smart Contracts in Solidity language
- Blockchain development using web3.js
Jun 2019 — Apr 2022
VK — Team Leader of PHP Developers in Advertising Department is the biggest social network in Russia, which entails:

- 50 millions Daily Active Users
- Working in a very high load environment with high responsibility
- Working with the best of the best in the country

My responsibilities:
- Development of targeting and data collection tools
- Development and support of VK pixel tech on external sites
- Development and support of dynamic retargeting
- Development and support of the ads API
- Development of AB testing tools
- Load monitoring, spotting, and elimination of bugs and errors

Notable achievements:
- Helped merging two companies and their code base
- Migrated code from monolith to microservices
Jun 2018 — Jun 2019
RealTimeGroup — Lead PHP Developer
My responsibilities:
- Managing Backend Developer Team.
- Coordination and discussion of projects with the management.
- Development of the project architecture.
- Created the project for automatic processing of receipts and data recognition
- Designing an ElasticSearch database, building queries using complex logic, - Stress Testing
and writing built-in search scripts
- Monitoring code coverage value by automated tests
- Doing Stress Testing

Jan 2016 — Jun 2018
SADESIGN — Software Developer
My responsibilities:
- Fullstack website development. (PHP and JavaScript)
- Using Laravel and Vue.js for development site
- Development of daemon services in Python
- Administering servers and backup system
- Created projects by QT (C++)
Jan 2013 — Dec 2016
Hosting company Beget — PHP Developer
My responsibilities:
- BackEnd PHP programming
- FrontEnd programming
- Full cycle of work on project features
- Elimination of errors (work through bug tracking)
- Profiling problem requests (XHProf and xDebug)
- Using Yii framework for development site
- Writing multiprocess and multithreading, daemons and services for managing servers.
- Administrating:
  • MySql
  • Nginx
  • Apache
  • Network

Notable accomplishments:
  • Writing a fully automated sales system for SSL certificate issuing and deployment for clients' websites
  • Created management and automatic salling system and allocate external IP addresses for clients' websites