Description: Telecom and money transfer companyExpertise: Golang, MongoDB, Redis, Microservices, Architecture, AWSResponsibilities: Development and support backend applications and microservices, external integrations, architectural decisions, mentoring team membersAchievements: End-to-end ownership of a key telecommunication featureTech Stack: Golang, MongoDB, Redis, Oracle, Couchbase, .NET, Java, Terraform, Jenkins, Kubernetes, AWS

Description: iGaming servicesExpertise: Golang, NodeJS, Solidity, TON, MongoDB, Redis, PostgresQL, ClickhouseResponsibilities: 2 development teams leadership, hiring and mentoring members, development/management/delivery processes, cost optimization, infrastructure design, observability/metrics, customer feedback processingAchievements: Developed MVP of new iGaming platform, Telegram application with Tap2Earn mechanics, cost optimization of crypto payment gateways providers (replaced with inhouse gateways)Tech Stack: Solidity, NodeJS, MongoDB, Redis, Postgres, Temporal, Go, Ethereum, BSC, VueJS, React

Description: Cashback service and referral networkExpertise: Golang, Ruby, PostgreSQLResponsibilities: Decomposition of legacy applications, services development, architecture design, team leadership, hiring and mentoring team members, development/management/delivery processes, customer feedback processingAchievements: Support scaling of user base from 20k to 1m in six monthsTech Stack: Ruby, PHP, Java, Golang, PostgreSQL, MySQL, Redis, 1C, RabbitMQ, Elasticsearch, Kubernetes, VueJS

Main expertise: Go, NodeJS, Perl, MongoDB, PostgreSQL Responsibilities: creation of applications, architecture and infrastructure for high loaded services, creation of IT organisation structure and automatisation of development pipeline, 5-10 people in subordination Tech Stack: Go, NodeJS, Perl, Ruby, VueJS, MongoDB, PostgreSQL Achievements: developed high loaded service for resizing images, rendering templates with data from original sites, developed custom CRM system and customer backoffice for mobile website settings and payments

Description: Websites developmentExpertise: PHP, Ruby, MySQL, PostgreSQLResponsibilities: Backend development and adaptationAchievements: Developed a custom CMS, reducing development costs by 20%Tech Stack: PHP (Bitrix, Zend Framework, YII), Perl, Ruby (RoR), MySQL, PostgreSQL