Duman Shalabaev

•Responsible for the stability, fault tolerance, and performance of large-scale PostgreSQL and ClickHouse clusters under extreme high-load and Big Data conditions.
•Architected and maintained distributed database infrastructures: implemented sharding, partitioning, and streaming replication for transactional (OLTP) and analytical (OLAP) systems.
•Ensured High Availability and Disaster Recovery (HA

•Responsible for the operation, performance, and availability of DBMS (PostgreSQL, MS SQL Server) powering high-load ecosystem products (Homebank, Onlinebank, Kino.kz) under a strict 99.99% banking SLA.
•Configured and maintained high-availability and disaster-recovery clusters (HA/DR, replication, load balancing) to ensure business continuity and minimize RPO/RTO.
•Executed performance tuning: op

•Ensured high availability, automation, and continuity for core banking systems (RS-Bank, RS-Loans, BanksGate).
•Administered and optimized high-load DBMS (Oracle, PostgreSQL): configured replication, clustering, backup/recovery, and performance tuning (PGA/SGA, VACUUM, indexing, and SQL optimization).
•Automated infrastructure deployment, configuration management, and staging/production database

•Managed, supported, and evolved cloud and hybrid infrastructure (Linux, VMware, Windows Server).
•Designed and maintained resilient CI/CD pipelines to automate build, test, and deployment processes.
•Implemented Infrastructure as Code (IaC) using Terraform and Ansible for automated server provisioning and configuration management.
•Optimized containerized environments (Docker), supporting and sca

•Administered and maintained enterprise-grade telecom network infrastructure (Cisco, Huawei, Juniper), ensuring high availability and SLA compliance.
•Configured, optimized, and troubleshoot L2/L3 networking protocols (VLAN, STP, OSPF, BGP, MPLS) across core and distribution layers.
•Managed network security controls: configured firewalls (ACLs, NAT, IPsec VPN), VPN tunnels, and enforced access po