Experience

Company name under NDA
• IT Services and IT Consulting
• 1 - 100 Employee
• Senior Data Engineer

  • Jun 2023 - Present


Various

• Financial Services
• 1 - 100 Employee

• Database Administrator

  • Jan 2021 - Jun 2023

  Freelance DBA, DevOps and technical support for the past projects and companies (finding and solving performance problems, hardware and architecture consulting). Freelance DBA, DevOps and technical support for the past projects and companies (finding and solving performance problems, hardware and architecture consulting).



MIDVIX

• United States
• Spectator Sports

• Database Administrator

  • Dec 2019 - Dec 2020

  Setting up large-scale production and new development servers, environment migration. High availability architecture. Database support and optimization. Setting up large-scale production and new development servers, environment migration. High availability architecture. Database support and optimization.



NAGA

• Germany
• Financial Services
• 100 - 200 Employee

• Technical Lead

  • Sep 2018 - May 2019

  Redesign of architecture for stock trading broker system (services, RPC and database levels). Design for a better fail-safe architecture. Database redesign (PostgreSQL, HBase). Finding and solving performance problems (messaging and database). AWS cost optimization. Redesign of architecture for stock trading broker system (services, RPC and database levels). Design for a better fail-safe architecture. Database redesign (PostgreSQL, HBase). Finding and solving performance problems (messaging and database). AWS cost optimization.



Midvix

• United States
• Spectator Sports

• Senior Software Development Engineer

  • Feb 2018 - Sep 2018

  Development of NLP components for sales integration robots. Setting up of development and operation environments. System administration, DevOps. Development of NLP components for sales integration robots. Setting up of development and operation environments. System administration, DevOps.



Cezurity Ltd

• Data Engineer

  • Nov 2012 - Jan 2018

  Development of multiple backend services (mostly Python-based microservices) for a cloud platform designed as malware and security threads protection system. Migration of all products to NoSQL database (HBase), including data migration and database design. Development of complex ETL pipelines and data engineering. Highload scaling of services, message processing, design and operation of data lakes and complex malware scanning services. Hardware and software optimizations, performance diagnostics. Database support (PostgreSQL). Operation and administration of large-scale SQL and NoSQL databases. www.cezurity.com Technologies: Python, RabbitMQ, PostgreSQL (development & DBA), Hadoop, HBase, LeoFS, Kubernetes, distributed systems, microservice design Show less



Automated Intelligent Systems

• Senior Software Development Engineer

  • Jul 2011 - Nov 2012

  Design and development of a wide range of backend services (payment gateways integration, service tasks for Bitcoin mining pool and for stock trading services). Development of middleware levels for stock trading platform, optimization and scaling. Architecture design, integration and technical support for multiple projects. Database support and administration (PostgreSQL). Technologies: Python, POSIX (sockets, multithreading, IPC), RPC, PostgreSQL (development and DBA), highload scaling Design and development of a wide range of backend services (payment gateways integration, service tasks for Bitcoin mining pool and for stock trading services). Development of middleware levels for stock trading platform, optimization and scaling. Architecture design, integration and technical support for multiple projects. Database support and administration (PostgreSQL). Technologies: Python, POSIX (sockets, multithreading, IPC), RPC, PostgreSQL (development and DBA), highload scaling



LANCK Telecom

• Telecommunications
• 100 - 200 Employee

• Software Developer

  • Jun 2006 - Jul 2011

  Design, development and operation of self-learning real time VoIP routing solution with interactive controls (originally for in-house use for large regional operator, later sold as a commercial product to other Telecom companies). The routing solution was fully written by me (C / Python combination for fast and memory-efficient implementation and high level business logic) to replace low-performance in-database solution and integrated with soft switch to allow most efficient route selection for every call. Capable of scaling to multiple servers while handling all the company traffic (100s millions of minutes per month) while selecting most optimal route among millions possible in real time, according to required quality, margin and other parameters and controlled by the rules set by users, traffic plan updates and call statistics used as a feedback. Later it was bundled as a commercial product, part of full-stack telecommunication suite. I handled integration with client systems, selection, set up and optimizations of software & hardware for the clients, both for my software and for databases it required to operate. Additionally: database support and system administration, assistant DBA for Oracle DB. Technologies: Python, C, POSIX (sockets, IPC, multithreading), Oracle DB (development and DBA), real-time applications Show less



Santi Ltd

• United Kingdom
• Restaurants

• System Administrator

  • Aug 2005 - Jun 2006

  Replacement of existing Windows 2000-based servers with Linux systems. Support of various network services. Installation and administration of multiple territorial-distributed networks with the goal of seamless and transparent user connectivity. Replacement of existing Windows 2000-based servers with Linux systems. Support of various network services. Installation and administration of multiple territorial-distributed networks with the goal of seamless and transparent user connectivity.



SecureScoutWeb

• Software Developer

  • Apr 2005 - Sep 2005

  Support and improve existing backend code for web portal (tasks through freelance contractor). Support and improve existing backend code for web portal (tasks through freelance contractor).



ISP Velcanta

• Lead System Administrator

  • Jan 2004 - Apr 2005

  Set up and administration of all servers (Debian Linux, Red Hat Linux). Design and programming of custom billing system. Design and implementation of VPN solutions of various complexity, traffic control and shaping systems. Database support (Oracle DB). Set up and administration of all servers (Debian Linux, Red Hat Linux). Design and programming of custom billing system. Design and implementation of VPN solutions of various complexity, traffic control and shaping systems. Database support (Oracle DB).