Olzhas Akhmetkhan

Team Lead, Core Team

Lead a core team of 3 engineers building and optimizing spot and futures exchange trading engines and the WebSocket market-data gateway. Reduced WebSocket market-data gateway latency 3–4x through targeted refactoring of hot paths. Eliminated a class of recurring incidents by rewriting critical code paths and strengthening error handling, improving overall reliability and uptime. Stack: Go, Kafka, PostgreSQL, Redis, ClickHouse

• Reduced WebSocket market-data gateway latency 3–4x through targeted refactoring of hot paths.
• Eliminated a class of recurring incidents by rewriting critical code paths and strengthening error handling, improving overall reliability and uptime.

Team Lead / Architect

Led a 4-engineer team building an internet acquiring service processing payments for hundreds of merchants. Scaled payment throughput 10x (1 → 10 TPS) by redesigning the core processing pipeline and resolving contention hotspots. Optimized Postgres workload to run on 1/8th the RAM (64 GB → 8 GB RDS instance) while resolving long-standing performance issues that persisted even at the higher capacity — significantly cutting infrastructure cost. Redesigned the service architecture to improve reliability; reduced on-call and support load on the engineering team. Hired, onboarded, and mentored team members; set engineering standards and code-review practices. Stack: Go, PostgreSQL, Kafka, Redis, ClickHouse, Docker, Kubernetes

• Scaled payment throughput 10x (1 → 10 TPS) by redesigning the core processing pipeline and resolving contention hotspots.
• Optimized Postgres workload to run on 1/8th the RAM (64 GB → 8 GB RDS instance) while resolving long-standing performance issues that persisted even at the higher capacity — significantly cutting infrastructure cost.
• Redesigned the service architecture to improve reliability; reduced on-call and support load on the engineering team.
• Hired, onboarded, and mentored team members; set engineering standards and code-review practices.

Backend Engineer

Rewrote the web crawler from Ruby to Go, achieving a 10x+ performance improvement. Designed a dual-mode parsing engine: native Go HTTP client for static sites and headless Chrome for JS-heavy targets, chosen per crawl target. Stack: Go, PostgreSQL, Redis, RabbitMQ, Prometheus, Grafana, Docker, Kubernetes

• Rewrote the web crawler from Ruby to Go, achieving a 10x+ performance improvement.
• Designed a dual-mode parsing engine: native Go HTTP client for static sites and headless Chrome for JS-heavy targets, chosen per crawl target.

Backend Engineer

Backend engineer at a Kazakh news aggregator linking to major news sources. Replaced a custom, problematic OAuth implementation with Ory Hydra, improving security posture and reducing maintenance burden. Built high-load analytics ingestion on top of ClickHouse for aggregating reader activity. Stack: Go, PostgreSQL, RabbitMQ, Redis, ClickHouse, Ory Hydra, Docker, Kubernetes

• Replaced a custom, problematic OAuth implementation with Ory Hydra, improving security posture and reducing maintenance burden.
• Built high-load analytics ingestion on top of ClickHouse for aggregating reader activity.

Lead Developer

Lead of a 5-engineer team at Kazakhstan's #1 internet acquiring service (at that time) by payment volume and merchant count. Owned and supported a portfolio of 100+ microservices; mentored junior and mid-level engineers across the team. Rebuilt the shared logging subsystem, increasing throughput from 4k to 40k entries per second (10x) while reducing resource footprint. Operated under PCI DSS compliance; hardened code and infrastructure to meet audit and certification requirements. Stack: Go, PostgreSQL, RabbitMQ, Kafka, Redis, Prometheus, Grafana, Docker, PCI DSS

• Rebuilt the shared logging subsystem, increasing throughput from 4k to 40k entries per second (10x) while reducing resource footprint.
• Operated under PCI DSS compliance; hardened code and infrastructure to meet audit and certification requirements.

Software Engineer

Developed and supported services at a product company in cryptography and security. Implemented the Diffie-Hellman key exchange with custom cryptographic standards in Go, powering the secure channel for the desktop admin GUI. Worked across a polyglot stack on both backend and frontend components. Stack: Go, PHP, JavaScript (Vue, React, jQuery), C, Java, Erlang, MySQL, PostgreSQL, RabbitMQ, WebSockets, Docker

• Implemented the Diffie-Hellman key exchange with custom cryptographic standards in Go, powering the secure channel for the desktop admin GUI.

Junior Fullstack Developer

Built backend and frontend components of a marketplace platform. Rewrote the checkout page as a single-page application, increasing online-store conversion rate by 20%. Stack: PHP, MySQL, Redis, MongoDB, JavaScript

• Rewrote the checkout page as a single-page application, increasing online-store conversion rate by 20%.