Open to opportunities

David Song

@davidsong2

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Senior full-stack engineer specializing in cloud and payments.

United States

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What I'm looking for

I seek senior engineering roles building scalable, cloud-native systems and payment platforms where I can lead technical design, mentor engineers, and improve performance and reliability.

I am a senior full-stack software engineer with 11 years of experience building scalable cloud-native systems, telehealth platforms, and high-throughput payment infrastructures. I have led end-to-end projects at Amazon, architected HIPAA-compliant and secure APIs, improved system performance by up to 40%, and implemented machine-learning fraud detection to protect transactions.

I mentor and guide engineering teams, drive technical excellence through code reviews and leadership, and have deep experience across frontend and backend stacks, databases, and cloud/DevOps tooling. I seek to deliver resilient, high-performance systems that serve millions of users while fostering collaboration and continuous improvement.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Amazon

Sep 2019 - Present (6 years 2 months)

Led end-to-end development of Amazon Clinic, building a scalable, HIPAA-compliant telehealth platform and architecting high-throughput payment systems that improved transaction speed by 30% and reduced response times by 40%.

Java Python Go AWS Real Time Systems Payments Microservices Machine Learning

Full Stack Engineer

Twilio

Apr 2016 - Jul 2019 (3 years 3 months)

Developed and maintained web applications and APIs for Twilio’s cloud communication platform, implemented real-time data pipelines that reduced latency by 25%, and integrated third-party services to enhance product functionality.

JavaScript React API Integration Web Applications Performance Optimization Agile

Software Engineer

360 Learning

Dec 2012 - Mar 2016 (3 years 3 months)

Designed and implemented secure, scalable multi-currency payment and subscription systems, built real-time fraud detection and analytics dashboards that reduced fraud by 50%, and architected microservices for fintech integrations.