Open to opportunities

Kanji Hirata

@kanjihirata

Message

Experienced backend engineer with 8+ years of building scalable, high-performance systems.

Japan

Message

I am a Senior Software Engineer with over eight years of professional experience in backend development, specializing in Go (Golang). My career has focused on designing and scaling high-traffic applications, event-driven systems, and microservice architectures.

I have led engineering teams and driven projects that improved user engagement and business performance. My expertise spans backend development, distributed systems, cloud environments (AWS, GCP), containerized deployments, and performance optimization.

Beyond technical delivery, I enjoy taking ownership of complex challenges, mentoring teammates, and contributing to high-impact solutions. I thrive in collaborative, international, and remote-first settings where innovation and quality matter.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Global Fashion Group

Apr 2023 - Mar 2025 (1 year 11 months)

Introduced semantic search to eliminate zero-result queries, added personalization to recommendations driving ~$300K annual profit, and led a zero-downtime migration from Elasticsearch to OpenSearch.

Golang OpenSearch Elasticsearch PostgreSQL DynamoDB Redis Kubernetes Kafka gRPC AWS Terraform

Senior Backend Engineer

Luida Corporation

Jan 2020 - Apr 2023 (3 years 3 months)

Led a team of 5 to build and maintain a gaming backend serving 200,000 DAU and top downloads in Japan; designed Kubernetes microservices for a data ingestion pipeline handling ~100 events/sec and provisioned infrastructure for 10M users across GCP and AWS.

Golang Java (Spring Boot)Kubernetes MySQL PostgreSQL DynamoDB Redis Kafka gRPC Terraform

Backend Engineer

Luida Corporation

Jun 2018 - Dec 2019 (1 year 6 months)

Developed video conversion and streaming systems and contributed to backend services across the stack for performance and reliability.

Golang Java (Spring Boot)Python MySQL PostgreSQL DynamoDB Redis Kafka gRPC Kubernetes

Full-stack Engineer

Simplex

Apr 2017 - May 2018 (1 year 1 month)

Implemented a financial web application using Java/Spring Boot backend and TypeScript/React frontend, delivering end-to-end features and integrations.