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Leon Lee

@leonlee3

Senior software engineer building resilient cloud-native microservices, streaming pipelines, and GenAI-backed experiences.

United States

Message

What I'm looking for

I’m looking to build resilient cloud-native backend systems and real-time data/GenAI features, partnering with product teams while leading architecture. I want to ship with strong testing, observability, and security baked in.

I’m a Senior Software Engineer with 11+ years driving the full SDLC—from requirements and architecture to coding, test automation, CI/CD, and production SRE—for cloud-native products at Google, Amazon, and high-growth startups. I build resilient systems with deep backend mastery across Java, Go, and Python, plus microservices and event-driven designs.

I specialize in real-time Data & Streaming pipelines and modern web experiences: scaling streaming with Cloud Dataflow, Kafka, and Pub/Sub, and delivering fast, accessible UIs with React/Next.js, Lit Web Components, and PWAs. I also ship AI/ML and Generative AI services using TensorFlow/PyTorch and LangChain-powered RAG, integrating them into production products.

I lead through mentoring and engineering rigor—TDD/BDD, code reviews, Agile/Scrum rituals, and security/observability with OAuth 2.0/OIDC and OpenTelemetry. I’m energized by turning complex constraints into reliable architectures that meet sub-second SLAs.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Google

Jul 2018 - Present (7 years 11 months)

Engineered Java/Spring Boot microservices and gRPC/GraphQL APIs on GCP, securing OAuth 2.0/OIDC and deploying to GKE with Terraform/Helm. Built real-time LLM/RAG pipelines and modernized Google News PWAs, achieving Lighthouse scores >95 and reducing ERP migration latency by 40%.

Java Spring Boot gRPC GraphQL Terraform Apache Kafka OpenTelemetry

Senior Development Engineer

Amazon

Jul 2015 - Jul 2018 (3 years)

Built backend services for Alexa NLU and event-driven microservices for Amazon’s e-commerce platform using Kafka and RabbitMQ, exposing REST and GraphQL endpoints. Orchestrated EKS/OpenShift environments, automated CI/CD with Jenkins/GitHub Actions/CodePipeline, and secured APIs with OAuth 2.0/OIDC via AWS Cognito.

Java Spring Boot Apache Kafka RabbitMQ Amazon EKS Amazon Cognito OAuth 2.0 AWS Lambda CI CD

Internal Systems Intern

Dow Jones

Jun 2013 - Aug 2014 (1 year 2 months)

Refactored a Solaris-hosted PHP expense-approval system into modular Java/Spring REST APIs and moved the Oracle data tier to AWS RDS to support a microservice rollout. Containerized staging and automated deployments with Docker/Ansible/Jenkins, cutting environment setup from days to hours.

Java Spring Rest Services AWS RDS Docker Ansible Jenkins AngularJS Django Jira

QA Engineer Intern

Radancy

Jun 2012 - Aug 2012 (2 months)

Executed daily smoke-test suites for 10+ recruitment portals using Selenium WebDriver and TestNG, catching critical regressions within minutes of deploys. Improved quality and throughput by increasing test coverage by 40% via automated Jenkins regressions and reducing average defect fix turnaround by 30% through Jira triage and collaboration.