Sergey Filin | Сергей Филин

The largest platform for fanfiction authors and writers.
I was involved in the development of the new backend functionality PHP(Symfony) and MySql,
Engaged in code refactoring and realized integrations with external APIs.

Startup specializing in the implementation of cloud technologies in the financial sector.
My responsibilities included prototyping client applications using PHP and Vue.js,
Integrating the AWS technology stack across all application layers
and actively using TypeScript to develop features using AWS Lambda for data storage, authorization, and processing.

Game studio.
I was involved in the development of the company's main game series, Magic Seasons(Ёлочка 2020-2021).
It has been a TOP-1 game on VK (vk.com) and OK (ok.ru) social networks for over 7 years.
I was developing the backend part of the project, optimizing and refactoring the codebase and integrating parts of the Symfony framework into the project. I was working closely with MySql and MongoDB databases and developing a distributed transaction system spanning over different databases. Worked on integrating new features via social networking APIs.

Real-time ad bidding platform. RTB platform including own SSP and DSP.
This is a vast project including an advertisers’ self-service website with advanced reporting tools and payment gateways integrations written in PHP, a bidding cluster responsible for bidding written in Java and distributed databases in MySql and ClickHouse (400TiB+ of data).
I was developing a website, personal accounts, promo codes and payment systems integrations. I was also responsible for the user interface of statistics and data display from distributed sources using complex SQL queries. I was involved in improving the database, connecting aggregation tables, data normalization, etc. Assisted other campaign projects in working with databases and payment APIs.

Web studio.
Development of CRM systems and multi-tenant eCommerce systems. Database design, development of payment systems, mailing lists, integration with external API services payments, maps, weather, delivery etc.
Integration of 3D tours on customer sites.

Real estate Advertising agency.
Worked on server-side and client-side agency websites (ad aggregators, real estate catalogs, landings) using Yii 1 and Bootstrap, refactoring and migration projects to Yii 2. Integration with API services of maps, weather, etc.