Open to opportunities

Kai Lin Her

@kailinher

Message

I’m a Senior software engineer building reliable, large-scale backend platforms across finance and e-commerce.

Japan

Message

What I'm looking for

I’m looking to lead backend and system-architecture work for cloud-native products, improve API performance and reliability, and build strong CI/CD with observability and compliance-minded engineering.

I’m a Senior Software Engineer with 9+ years of experience building and scaling large-scale web platforms across finance and e-commerce. I specialize in backend development (Ruby on Rails, Sinatra, Go, Python) and I’ve led end-to-end architecture and backend delivery for a financial SaaS platform handling millions of daily transactions under strict SLAs.

At Bloomberg LP, I rebuilt core transaction-processing services in Ruby on Rails and Go—improving throughput by 45% and reducing per-request latency under peak load—while optimizing PostgreSQL and Redis to cut average query latency by 55%. I also migrated from monolithic to containerized microservices on AWS Fargate and Kubernetes, established CI/CD pipelines (GitHub Actions, Terraform, Docker), and strengthened observability and reliability to achieve 99.99% uptime.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Bloomberg Lp

Sep 2019 - Present (6 years 10 months)

Led end-to-end architecture and backend development for a financial SaaS platform handling millions of daily transactions under strict SLAs. Rebuilt and optimized transaction-processing services, improving throughput by 45% and reducing latency, while migrating to containerized microservices on AWS.

Software Engineer

Wego.com

May 2018 - Aug 2019 (1 year 3 months)

Developed and maintained e-commerce platform features, including GraphQL APIs to unify backend data access across front-end applications. Built backend services for reconciliation and billing jobs, improving operational efficiency and test coverage while reducing database load.