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Senior Full Stack Engineer with 10+ years of experience building scalable SaaS platforms and distributed systems. Expertise in Python, Node.js, and modern frontend frameworks including React and Next.js. Strong background designing microservices architectures, highperformance APIs, and cloud-native applications on AWS and GCP. Experienced delivering AI-enabled features, real-time data systems, and production-grade backend services handling high-volume workloads.…Senior Full Stack Engineer with 10+ years of experience building scalable SaaS platforms and distributed systems. Expertise in Python, Node.js, and modern frontend frameworks including React and Next.js. Strong background designing microservices architectures, highperformance APIs, and cloud-native applications on AWS and GCP. Experienced delivering AI-enabled features, real-time data systems, and production-grade backend services handling high-volume workloads.

Kai Leen

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Senior Full Stack Engineer with 10+ years of experience building scalable SaaS platforms and distributed systems. Expertise in Python, Node.js, and modern frontend frameworks including React and Next.js. Strong background designing microservices architectures, highperformance APIs, and cloud-native applications on AWS and GCP. Experienced delivering AI-enabled features, real-time data systems, and production-grade backend services handling high-volume workloads.…Senior Full Stack Engineer with 10+ years of experience building scalable SaaS platforms and distributed systems. Expertise in Python, Node.js, and modern frontend frameworks including React and Next.js. Strong background designing microservices architectures, highperformance APIs, and cloud-native applications on AWS and GCP. Experienced delivering AI-enabled features, real-time data systems, and production-grade backend services handling high-volume workloads.

Available to hire

Senior Full Stack Engineer with 10+ years of experience building scalable SaaS platforms and distributed systems. Expertise in Python,
Node.js, and modern frontend frameworks including React and Next.js. Strong background designing microservices architectures, highperformance APIs, and cloud-native applications on AWS and GCP. Experienced delivering AI-enabled features, real-time data systems, and
production-grade backend services handling high-volume workloads.

Skills

Experience Level

Expert

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Language

English

Fluent

Work Experience

Senior Software Engineer at Clearwave

January 1, 2024 - February 2, 2026

Built SaaS platforms and distributed systems; developed real-time dashboards using React and Next.js; designed high-performance APIs; deployed cloud-native applications on AWS; managed data pipelines for high-volume operational data.

Senior Full Stack Developer at Anuitex

January 1, 2019 - October 1, 2023

Led modernization of enterprise systems into scalable cloud-native architectures using Python and Node.js services; transformed legacy monoliths to AWS serverless; processed 8M+ yearly transactions; reduced infrastructure costs by ~40%; built data pipelines using AI-assisted tooling; integrated Kafka and RabbitMQ for event-driven data flow; deployed containerized microservices on Kubernetes.

Junior Full Stack Developer at Blue Orange

April 1, 2013 - May 1, 2014

Shanghai, China: Improved internal web applications using Node.js and JavaScript; developed frontend UI components; designed SQL stored procedures across 5+ departments; improved query performance by 35%.

Junior Full Stack Developer at Blue Orange

July 1, 2014 - October 1, 2018

Seattle, WA, United States: Developed scalable web applications and backend services; expanded backend using Python and Node.js; built real-time dashboards with React/Angular; supported financial analytics and reporting platforms; optimized database queries.