Justin Wang

I am a Senior Software Engineer with 10 years of experience delivering scalable, high-performance solutions across e-commerce and fintech. I specialize in full-stack development, cloud-native infrastructure, and microservices architecture while ensuring compliance with HIPAA and PCI-DSS.

I led the design and development of a healthcare payment platform that streamlined revenue cycle workflows and improved payment collections for providers. I implemented FHIR-based EHR integrations achieving 99.9% data sync accuracy, built an Estimate Service that reduced cost estimation time from 15s to 2s and cut claim denials by 13%, and launched a Payment Service that increased payment collection by 30%.

At Shopify I modernized legacy systems into microservices, replaced REST with GraphQL to cut latency by 30%, revamped React storefronts to reduce page load time by 30%, and applied AI-powered recommendations to boost feature adoption by 25%. I also drove containerization and event-driven pipelines on Kubernetes to improve resilience and deployment velocity.

I prioritize observability, CI/CD automation, and secure architectures—integrating Datadog, New Relic, Prometheus and building pipelines with GitHub Actions and Jenkins that reduced release time by 40%. I enjoy mentoring engineers, shaping technical strategy, and delivering reliable systems that align technology with business outcomes.