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I’m a Senior Software Engineer based in Irvine, CA, passionate about building scalable backend architectures and cloud-native solutions for fintech and global e-commerce platforms. I enjoy modernizing legacy systems, optimizing data processing, and delivering reliable, high-performance services that empower millions of users. With hands-on experience in Node.js, AWS, and microservices, I design resilient systems, drive cross-functional collaboration, and promote best practices like TypeScript, CI/CD, and infrastructure as code. I thrive in fast-paced environments where compliance, security, and scalability matter as much as user experience.…I’m a Senior Software Engineer based in Irvine, CA, passionate about building scalable backend architectures and cloud-native solutions for fintech and global e-commerce platforms. I enjoy modernizing legacy systems, optimizing data processing, and delivering reliable, high-performance services that empower millions of users. With hands-on experience in Node.js, AWS, and microservices, I design resilient systems, drive cross-functional collaboration, and promote best practices like TypeScript, CI/CD, and infrastructure as code. I thrive in fast-paced environments where compliance, security, and scalability matter as much as user experience.

Sung Choi

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

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I’m a Senior Software Engineer based in Irvine, CA, passionate about building scalable backend architectures and cloud-native solutions for fintech and global e-commerce platforms. I enjoy modernizing legacy systems, optimizing data processing, and delivering reliable, high-performance services that empower millions of users. With hands-on experience in Node.js, AWS, and microservices, I design resilient systems, drive cross-functional collaboration, and promote best practices like TypeScript, CI/CD, and infrastructure as code. I thrive in fast-paced environments where compliance, security, and scalability matter as much as user experience.…I’m a Senior Software Engineer based in Irvine, CA, passionate about building scalable backend architectures and cloud-native solutions for fintech and global e-commerce platforms. I enjoy modernizing legacy systems, optimizing data processing, and delivering reliable, high-performance services that empower millions of users. With hands-on experience in Node.js, AWS, and microservices, I design resilient systems, drive cross-functional collaboration, and promote best practices like TypeScript, CI/CD, and infrastructure as code. I thrive in fast-paced environments where compliance, security, and scalability matter as much as user experience.

Available to hire

I’m a Senior Software Engineer based in Irvine, CA, passionate about building scalable backend architectures and cloud-native solutions for fintech and global e-commerce platforms. I enjoy modernizing legacy systems, optimizing data processing, and delivering reliable, high-performance services that empower millions of users.

With hands-on experience in Node.js, AWS, and microservices, I design resilient systems, drive cross-functional collaboration, and promote best practices like TypeScript, CI/CD, and infrastructure as code. I thrive in fast-paced environments where compliance, security, and scalability matter as much as user experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Origence

September 1, 2019 - Present

Architected a modernized lending technology platform enabling end-to-end loan origination and processing for hundreds of credit unions with complex financial compliance requirements. Engineered scalable backend microservices using Node.js and Express, containerized with Docker, and deployed on Amazon ECS to improve reliability and deployment frequency. Optimized data processing pipelines for high-volume loan applications via Amazon RDS and Redis, reducing query latency by 40% and ensuring real-time access to financial data. Integrated third-party financial APIs and compliance validation services to automate regulatory checks and reduce manual processing errors. Migrated legacy monolithic systems to a cloud-native AWS architecture leveraging Lambda and API Gateway for event-driven processing and secure endpoints. Automated infrastructure provisioning with Terraform and CloudFormation, establishing immutable patterns and improving environment consistency. Drove platform modernization wit

Software Engineer at Experian Consumer Services

March 1, 2019 - August 1, 2019

Developed software solutions for a global leader in consumer credit information, contributing to backend systems that processed massive datasets for credit reporting and identity services. Processed and analyzed large datasets using SQL Server and Python to ensure data integrity and regulatory compliance. Enhanced consumer-facing credit platform features with clean JavaScript code to improve user experience and support credit monitoring services. Resolved technical issues in data-intensive environments to optimize backend performance and ensure reliable delivery of credit reports and scores to end users.

Software Developer at iHerb

May 1, 2016 - March 1, 2019

Built and shipped production features for a major global e-commerce platform, supporting millions of users and high-volume order fulfillment. Shipped consumer-facing features using JavaScript and React to enhance product personalization and the shopping experience. Scaled backend infrastructure to handle peak traffic during promotions by leveraging AWS auto-scaling and load balancing. Personalised user experiences by developing recommendation algorithms and dynamic content rendering. Supported platform reliability by collaborating with DevOps to monitor performance and resolve issues in a fast-paced retail technology environment.

Developer/Programmer Intern at Symetra Systems Inc.

April 1, 2015 - September 1, 2015

Contributed to custom database development and application projects for small to medium-sized businesses, gaining hands-on experience in full-stack development. Developed database programming and application features using Microsoft Access, SQL Server, and ASP.NET, laying the groundwork for a software engineering career.