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Ellen Sun

@msellen

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Senior software engineer focused on scalable serverless and web application solutions.

United States

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What I'm looking for

I seek a senior engineering role building reliable, scalable cloud-native applications with strong testing, automation, and collaborative agile practices.

I am a senior software engineer with extensive experience building scalable web applications and serverless backends using AWS, TypeScript, Python, and modern front-end frameworks. I drive quality through automated testing, CI/CD practices, refactoring, and mentoring—consistently delivering iterative, user-centered solutions for education and enterprise platforms.

My background spans end-to-end implementation from APIs and microservices to front-end interfaces and operations, with measurable impact in automation, reliability, and developer productivity. I lead teams through agile practices, onboard new members, and create workflows that process high-volume data while maintaining strong test coverage and operational excellence.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Flexion

Built a complex web application and serverless API backend for education test management, implemented 11 microservices and state machine workflows to process high-volume data and send events to EventBridge, and increased test reliability with 90% unit coverage plus Cypress e2e tests.

TypeScript AWS Lambda DynamoDB EventBridge Step Functions Serverless Architecture Cypress Unit Testing

Senior Software Engineer

The Home Depot

Developed automated internal tools and dynamic web applications using React and Python, maintained enterprise developer platforms (Artifactory, GitHub Enterprise, Jenkins) and automated repetitive tasks with Python, Bash and Go to improve team efficiency.

React Python BASH Golang Jenkins GitHub Enterprise Artifactory Linux ServiceNow

Developer

Emory University

Developed and maintained web-based client-server applications for Research Administration using PHP, PL/SQL and JavaScript, managed Windows/Linux environments, gathered requirements and drove product deliveries with high customer satisfaction.

PHP Oracle PL SQL JavaScript jQuery MSSQL Linux Apache Requirements Gathering Support

Web Developer

IgnitionOne

Implemented client digital marketing integrations and built front-end features, integrating user-facing elements with customer data platforms while supporting stakeholders and ensuring data security via SFTP, JWT and GPG/PGP.

JavaScript HTML5 CSS3 PHP SVN Git XML PGP

Education

Degrees, certifications, and relevant coursework

Georgia Institute of Technology

Bachelor of Science, Business Management & Marketing

Completed a Bachelor of Science in Business Management & Marketing focusing on business and marketing principles relevant to technology and product initiatives.