Vladimir Khramov
Lead Backend Engineer at Bumble Inc.
England, United Kingdom
Summary
👤
Senior🎓
Top SchoolVladimir Khramov is a Lead Backend Engineer with 14 years of experience building and scaling backend systems across Python (Django, asyncio) and PHP (Symfony, Yii2), currently leading backend at Bumble in the UK. He combines production-grade backend engineering with hands-on work in blockchain—developing and auditing Solidity smart contracts for DeFi—and has shipped integration microservices connecting payment, KYC and blockchain systems. His open-source contributions include bug fixes and test improvements to major PHP frameworks like Phalcon and Yii2, demonstrating attention to database correctness and multidimensional data handling. Vladimir often oscillates between deeply technical problem-solving (SQL/query fixes, async services) and practical team leadership, having led web teams and mentored engineers. He brings a practical security-minded perspective to backend design, informed by real-world smart contract audits and financial reporting systems.
14 years of coding experience
15 years of employment as a software developer
Specialist Software Engineering, Specialist Software Engineering at Pacific National University
English, Russian
Github Skills (16)
yii10
extjs10
application-framework10
unit-testing10
phalcon10
app-framework10
web-framework10
php10
php-extension10
database-testing10
testing10
sql9
php-framework9
postgresql7
mysql7
Programming languages (10)
Github contributions (5)
phalcon/cphalcon
Sep 2014 - Jan 2015
High performance, full-stack PHP framework delivered as a C extension.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits, 8 PRs, 5 comments in 4 months
Contributions summary:Vladimir primarily contributed to the testing and improvement of the Phalcon framework's database component, specifically focusing on the `fetchColumn`, `insertAsDict`, and `updateAsDict` functionalities. They fixed SQL queries, corrected test values, and adapted array syntax for PHP 5.3 compatibility. The user also modified the router annotations and metadata default values for model definitions.
full-stackphpframeworkphalconphp-extension
yiisoft/yii2
Dec 2015 - Feb 2016
Yii 2: The Fast, Secure and Professional PHP Framework
Role in this project:Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:7 commits, 10 PRs, 26 comments in 2 months
Contributions summary:Vladimir's contributions primarily involved modifying and testing the Yii2 framework's core functionalities. They addressed a bug related to the `Request` class's handling of server variables. The user also improved the functionality of `ArrayHelper::index` method, adding support for multidimensional indexing. Furthermore, the user added new tests, and fixed existing ones, in areas such as asset bundles and number validation.
secureprofessionalchinese-simplifiedyiiphp
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