Sergey Efimov Email & Phone Number

Developed CI/CD pipelines and rolled up new environments for microservice productsPrepared products of acquired companies for migrations to different cloud platforms (AWS, k8s) by using 12-factor apps methodologyResearched products of acquired companies to understand internal mechanisms and dataflows Maintained import phases of products (knowledge transfer sessions, code migrations, architecture research)Supervised changes from other developers Supervised technical solutions of other architects Did dockerization of different acquired products of the company

Penza Region, Russian Federation

Maintained and developed one of the biggest German Bank B2B aggregator - FinAPI (www.finapi.io) Developed backend for a web money-box service for German banks (using Hibernate, Spark and Google Guava)Developed Facebook chat bot for payment system with automatic billing recognition by photo Developed of Android apps prototypes for the money-box service

Maintained the banking card frontend system of one of the biggest Russian bank (Gazprom bank)Integrated of different third-party FinTech solutions to the existing card processing systemIntegrated new types of transactions processing from different POS and EPOS terminalsDid troubleshooting of the card processing for one of the biggest Russian bank (Gazprom bank)Developed updates for mandatory changes from different payment systems (Mastercard, Visa, etc)Maintained of stored procedures on Oracle DB

Penza Region, Russian Federation

Developed and maintained of drivers for different peripherals devicesDeveloped from scratch complicated embedded systems of information security with high-reliability level

Penza Region, Russian Federation

Participated in the full lifecycle of development of x.509 certificate centerImplemented client library to exchange with the certificate center