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oly User

@olyuser

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Senior Golang Engineer at DNS who built a 2,000+ RPS Search API for a 9M-product catalog.

Thailand

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At DNS, I built the Seller Portal backend from scratch and developed the Search API for a 9M-product catalog, serving 2,000+ RPS at peak with p99 under 150 ms. I also designed a zero-downtime data resync using dedicated Kafka consumer groups.

At Gold Apple, I moved order logic from a monolith to Go microservices and built a Delivery Integration Service for logistics partners. I implemented a Transactional Outbox for Kafka events, bringing lost orders down to zero, and Redis-based soft reservation that handled 1,500+ RPS during sales with zero overselling.

Experience

Work history, roles, and key accomplishments

Current

Senior Golang Engineer

Current

DNS

Dec 2023 - Present (2 years 10 months)

Built the Seller Portal backend from scratch in 2.5 weeks and designed a zero-downtime full data resync for a ~9M-product catalog using dedicated Kafka consumer groups. Developed the Search API serving all catalog traffic with 2,000+ RPS at peak and p99 < 150 ms.

Go Kafka Redis Etcd Kubernetes Docker AWS GCP Azure Gitlab CI Prometheus Grafana Testifying GoMock Microservices Transactional Outboxes Circuit Breakers Worker Pools

Senior Golang Engineer

Gold Apple

Nov 2021 - Nov 2023 (2 years)

Led the move of order logic from a monolith to Go microservices and built a Delivery Integration Service for all logistics partners. Implemented Transactional Outbox for Kafka events, bringing lost orders down to zero, and built Redis-based soft reservation handling 1,500+ RPS during sales with zero overselling.

Go Kafka Redis PostgreSQL Scylla Etcd S3 Kubernetes Docker AWS GCP Azure Gitlab CI Prometheus Grafana Testifying GoMock Microservices Transactional Outboxes Circuit Breakers Worker Pools

Golang Engineer

SberMarket

Aug 2019 - Oct 2021 (2 years 2 months)

Built the Decision Engine on Kafka streams, sustaining 1,000 RPS with compute-heavy AI algorithms and integrated Rust modules. Designed ~5 TB PostgreSQL JSONB storage for real-time analytics and built a Feature Store for ML models.

Go Kafka PostgreSQL Redis Scylla Etcd S3 Kubernetes Docker AWS GCP Azure Gitlab CI Prometheus Grafana Testifying GoMock Microservices Transactional Outboxes Circuit Breakers Worker Pools

Junior Software Engineer

Evotor

Dec 2018 - Jul 2019 (7 months)

Enhanced Python data-ingestion services and took part in the pilot migration to Go. Helped standardize Docker images and GitLab CI pipelines, reducing deployment time.

Python Go Docker Gitlab CI