Led the design and implementation of scalable microservice architecture to ensure system resilience and maintainability Architected and developed complex backend business logic for mission-critical services Designed and integrated secure, fault-tolerant payment gateways with high transaction throughput Conducted deep code reviews and refactoring to improve system performance, maintainability, and scalability Built and optimized real-time, high-load distributed services ensuring low-latency communication and high availability Enhanced database performance through advanced query optimization and indexing strategies Tech Stack: TypeScript, Node.js, NestJS, PostgreSQL, Redis, ClickHouse

* construction of neural networks for classification, regression and forecasting of time series (LSTM, GRU, Transformers) * construction of networks for image classification (ConvNet) * use of AutoMl tools to search for optimal network architectures and hyperparameters * creation of RL-agents for different env (PPO, SAC) * data preparation and cleaning, feature engeneering

Key responsibilities and features: * Backend architecture planning and implementation * Backend team task management * Technical team guidance * Team building and education * 'ZIO' evangelism * Android development team curator (partial information due to NDA)

Develop and support Big Data event-stream analytics system (avg 1G evens/day) Tech stack: Storm, Kafka, Cassandra, Zookeeper, Hazelcast, Tomcat7, java8, maven, git, ansible, docker, teamcity, hazelcast

Responsibilities: - Architecting - C# and ASP.NET Application Development - iOS Application Development - Android development - Team management - Team education - Java development - C++ cross-platform development - Development automation Results: - Budgeting system for Russian Federation (used from 2012) - Global distributed surveillance system (used for anti-terror surveillance on transport infrastructure) - Development automation system used in Russian eGov - Communication channels quality control system - iOS client for p2p document exchange system (used in eGov workflow and in enterprise environments) - Social control (portal+mobile application used to control price/quality of products in shops)

- software development and maintenance - product deployment in the Volga Customs Administration (Nizhny Novgorod) - personal education in the Volga Customs Administration (Nizhny Novgorod)

- Project management + Client Relations - Web development

- Developing and maintaining sites www.bevip.ru and www.xlshop.ru - Network Admin - Teaching newcommer developers

- Developing B2B portal for street maintainers. - Building internal network for clients. - Maintaining B2B portal site

- Developing buisnes applications, building sites and databases (used on MSK City, Tsaritsino) - Developing applications for microcontrollers ( PIC ) - Apllications testing