Open to opportunities

Justin Wang

@justinwang1

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Staff Software Engineer specializing in scalable microservices, AI-driven solutions, and cloud architecture.

United States

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What I'm looking for

I seek senior engineering roles building scalable, secure cloud-native systems with strong cross-functional collaboration, mentorship, and measurable product impact.

I am a Staff Software Engineer with 10 years of experience building scalable microservices, event-driven systems, and AI-integrated platforms across telehealth, fintech, and e-commerce domains. I lead migrations from monoliths to distributed architectures and design secure cloud solutions on AWS and GCP.

I have driven high-impact projects including an AWS EKS microservices migration supporting thousands of concurrent WebRTC sessions, FHIR-compliant APIs for EHR integrations, and subscription billing systems supporting millions of active subscriptions. I pair backend expertise in Go, Java, Python, and Node.js with frontend work in React/TypeScript to deliver end-to-end products.

I prioritize engineering excellence, reliability, and measurable business outcomes, mentor engineers, and collaborate cross-functionally to deploy observability, CI/CD, and AI/ML-powered features that reduce MTTR, improve performance, and enhance user workflows.

Experience

Work history, roles, and key accomplishments

Current

Staff Software Engineer

Current

Amwell

May 2021 - Present (4 years 5 months)

Led migration of a legacy telehealth monolith to AWS EKS microservices, improving reliability and supporting thousands of concurrent WebRTC sessions; architected FHIR-compliant APIs and AI-powered triage integrations to streamline provider workflows.

Go Java WebRTC SNS Sagemaker fastAPI PostgreSQL DynamoDB Kubernetes

Software Engineer

Stripe

Apr 2018 - Mar 2021 (2 years 11 months)

Designed and implemented subscription microservices and multi-currency billing flows supporting 5M+ active subscriptions; built secure REST APIs, event-driven retry pipelines, and UI integrations that reduced failed payments and improved dashboard performance.

Python Django Go Kafka Redis OAUTH2 PostgreSQL React GraphQL

Fullstack Developer

Shopify

Aug 2015 - Feb 2018 (2 years 6 months)

Built responsive merchant analytics dashboards and backend APIs, implemented Sidekiq background processing and optimized PostgreSQL queries to deliver real-time reporting and improve merchant engagement through A/B testing.