As a CTO responsible of two products.1. Kazakhstan National Realtime Payment SystemRTPS (Realtime Payment System) is bank backend system that makes able money transferring and QR payments between banks customers on realtime. For P2P transfers as an ID uses receiver mobile phone number, for payments QRcode base on EMVco QR standard for backward compatibility and smooth integration with other systems like mVisa. Main financial protocol uses ISO20022. Stack for backend based on Java and Netty library for fast network delivery. System is horizontal scalable and serves from two datacenter in active-active mode.Technology used:VmWare for virtualizationPostgreSQL cluster for RDBMSMongoDB cluster as a document storage for loggingRabbitMQ as Queue servant Kafka for streamsKubernetes/Docker for containers. Micro-service architecture.2. Social Wallet (Electronic wallet for G2C)Electronic wallet system for citizens for G2C payments with tens of millions users with biometric identification.Stack Java14 VmWare for virtualizationPostgreSQL cluster for RDBMSMongoDB cluster as a document storage for loggingRabbitMQ as Queue servant Kafka for streamsKubernetes/Docker for containers. Micro-service architecture.Front of the system is mobile application on iOS and Android platform and web interface. Native mobile applications content serving directly from backend and can be updated without application update on stores. Such approach reduced time to market from weeks to couple of minutes. Application has very strong authentication mechanism based on ECDH. Smartphone hack or MitM attacks durable.

Development of own product - Electronic wallet system. Fully in-house developed Electronic wallet system AituPay.Core of the system that responsible for transactions and the most heavy-load part of the system developed using reactive Actor model (Akka) with Kafka integration and zero-message-loss approaching. Stack for development is Java14.System is DB agnostic and as RDBMS uses PostgreSQL cluster located in two different DC. Stored procedures in DB uses only for data consistency guarantee. Such architectural approach gives weak linking to RDBMS and make last changeable at any time.System is fault tolerant and horizontal scalable thanks to Kubernetes and micro-services.Using Terraform, Ansible and well balanced and automated CI/CD reduce time to market to 2 weeks.

YayFon provides the best Business-to-Client communication experience that you can imagine. Our technology works with both parts. On your side, we will integrate YayFon with your help desk number, call-center or other PBX system. From this point, your client is able to contact you through the YayFon!Fully based on AWS. DynamoDB including DynamoDB global tables for multiple region replication of user data.Elasticache (redis) for session key-value storageRDS (Aurora) for relational DB purpose.Cloudfront with s3 integration for static content delivery.s3 for voice prompt and recording storage.ELB and EC2 templates for on-fly machine deployment and horizontal scalability

Lead and supervise company’s development projects.Responsible for development, integration and organizational effectiveness. Advising on complex VoIP solutions for the large-scale telecommunication projects.Developing complex tools for large-scale cloud VoIP projects.

- Developed new OSS/BSS solution using Java/J2EE technologies- Operational efficiency assessment and optimization culminating in business process re-engineering as required.- Developed Project Management Plan for the phased rollout of infrastructure- Liaison with 3rd party outsourcing companies- Analysis of current and emerging technologies whilst developing an integrated platform to meet operational demands.

- Management and mentoring of personnel- Project coordination and implementation- Research and development of new technology- Financial and Technical evaluation for capacity planning and future development- Design and implementation of system and network architecture and policies/procedures, and user environment/access- Design/Implementation of policies/procedures for production system/cluster architecture

- Coordination of weekly scheduled downtimes for equipment maintenance with Production- Research and development of new technology and tools- Server side scripting (Bash)- Programming (C/C++/Java)- Management and mentoring of junior-level system administration personnel- Project coordination and implementation with Production and Junior Personnel- Financial and Technical evaluation for capacity planning and future development

- Administration of wide network and system administration of UNIX systems and software packages- Support for production servers and workstations, problem determination and resolution with Vendor contact/interface for Production Technical Support- Maintenance and modification of LAN (TCP/IP)- Server side scripting (Bash)- Programming (C/C++/Java)

- C/C++- Design software solutions to meet business objectives. - Develop software utilising accepted and proven design criteria. - Create high quality applications for use by global internal and external customers. - Provide experience-based recommendations regarding technology choices for new application development- Assist in the analysis of business requirements for software solutions. - Assist test team in design of test cases including identification of integration points between disparate applications. - Attend status meetings, provide feedback, and identify improvements in process. - Keep abreast of new and emerging technologies. - Take responsibility for your own safety and the safety of other employees, and comply with all instructions given regarding health, safety and the protection of the environment.- Assuring the resource availability during the go-live phase for the. - Continual improvement to the projects based on the feedback received from the customers.

- Java/C/C++- Develop software utilising accepted and proven design criteria.