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I'm Leon Lee, a senior software engineer based in Brooklyn, NY. I bring 11+ years delivering cloud-native software across Google, Amazon, and fast-growing startups, spanning backend, frontend, data pipelines, and ML-infused systems. I'm passionate about building resilient systems, mentoring cross-functional teams, and driving architecture decisions that align engineering work with product strategy while upholding security, observability, and performance.…I'm Leon Lee, a senior software engineer based in Brooklyn, NY. I bring 11+ years delivering cloud-native software across Google, Amazon, and fast-growing startups, spanning backend, frontend, data pipelines, and ML-infused systems. I'm passionate about building resilient systems, mentoring cross-functional teams, and driving architecture decisions that align engineering work with product strategy while upholding security, observability, and performance.

Leon Lee

Web Developer, Front-End Developer, Back-End Developer, +2

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I'm Leon Lee, a senior software engineer based in Brooklyn, NY. I bring 11+ years delivering cloud-native software across Google, Amazon, and fast-growing startups, spanning backend, frontend, data pipelines, and ML-infused systems. I'm passionate about building resilient systems, mentoring cross-functional teams, and driving architecture decisions that align engineering work with product strategy while upholding security, observability, and performance.…I'm Leon Lee, a senior software engineer based in Brooklyn, NY. I bring 11+ years delivering cloud-native software across Google, Amazon, and fast-growing startups, spanning backend, frontend, data pipelines, and ML-infused systems. I'm passionate about building resilient systems, mentoring cross-functional teams, and driving architecture decisions that align engineering work with product strategy while upholding security, observability, and performance.

Available to hire

I’m Leon Lee, a senior software engineer based in Brooklyn, NY. I bring 11+ years delivering cloud-native software across Google, Amazon, and fast-growing startups, spanning backend, frontend, data pipelines, and ML-infused systems.

I’m passionate about building resilient systems, mentoring cross-functional teams, and driving architecture decisions that align engineering work with product strategy while upholding security, observability, and performance.

Skills

Experience Level

Expert

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Intermediate

Work Experience

Software Engineer at Google

July 1, 2018 - Present

Engineered Java/Spring Boot microservices for GCP, integrating Angular frontends with gRPC/Protocol Buffers, Cloud SQL/PostgreSQL, and OAuth 2.0-based security. Migrated services to Kubernetes (GKE) and improved observability with Cloud Monitoring/OpenTelemetry, while implementing CI/CD with Terraform/Helm.

Senior Development Engineer at Amazon

July 1, 2015 - July 1, 2018

Developed Java/Spring Boot backends for Alexa NLU and Prime Air, plus Python/OpenCV pipelines for computer-vision workflows. Built event-driven microservices with Kafka and RabbitMQ, integrated PayPal/Stripe logistics APIs, and secured APIs with OAuth/OpenID Connect. Orchestrated Kubernetes clusters (EKS) and automated CI/CD with Jenkins and GitHub Actions.

Internal Systems Intern at Dow Jones

June 1, 2013 - August 1, 2014

Refactored PHP/SOAP-based expense system into Java/Spring REST APIs; migrated Oracle data to AWS RDS. Modernized internal dashboards with AngularJS and Django services, implemented lightweight monitoring scripts, and containerized environments with Docker to accelerate deployments.

QA Engineer Intern at Radancy

June 1, 2012 - August 1, 2012

Wrote Selenium WebDriver tests, performed cross-browser validation, and built nightly regression jobs in Jenkins; improved test coverage and streamlined Jira defect workflows for faster releases.