Stephen R. Chang
Lead Software Engineer
I am a senior/principal level backend engineer with strong cloud/DevOps expertise, AI/data integration skills, and leadership experience. The type who can both architect a high throughput system and own its production reliability end to end.
About Me
Backend Engineering Specialist
Strong expertise in Java, C# .NET Core, Spring JPA and building APIs/microservices at scale.
Experience with high-throughput, low latency systems handling 100M+ records/day in healthcare and FIX-based trading in finance.
Cloud & DevOps Leader
End-to-end ownership of AWS deployments (ECS, ECR, S3, Lambda, CloudWatch, VPC).
Builds Terraform modules, CI/CD pipelines and monitors with tools like Datadog.
AI & Data Engineering
Built RAG-based AI tools using Python, FastAPI, Pinecone, OpenAI.
Handles large scale data streaming with Kafka and database work with MongoDB, MySQL, Oracle SQL.
Domain Breadth
Healthcare tech: Clinical data platforms, AI for oncology
Finance tech: Order management systems, trade execution
Leadership & Mentorship
Leads teams, conducts interviews, mentors developers, and produces reusable templates/tools for org-wide productivity gains.
Additional Edge
Cross-disciplinary thinker with background in Economics, Math & Computer Science.
Co-founded an education business demonstrating entrepreneurial and community oriented traits.
Trilingual in Spanish, English and Chinese.
Technical Skills
Languages
Java, C#, JavaScript, Python, Swift, C, Shell
Backend
.NET Core, Spring, Microservices, RESTful APIs
Data
MongoDB, MySQL, Oracle SQL, Kafka
DevOps
AWS, Azure, Terraform, Docker, CI/CD
Certifications
Oracle Java 7 Programmer
Professional certification in Java programming and development
Advanced Java development, object-oriented programming, and enterprise application development
BCS-IT Infrastructure Library (ITIL)
IT service management best practices and framework
Service strategy, design, transition, operation, and continual service improvement
BCS-Business Analysis
Business analysis methodologies and requirements gathering
Stakeholder analysis, requirements engineering, and business process modeling
Featured Projects
comeet-iOS
co-meet iOS App
A collaborative meeting app for iOS devices, forked from bookaroom/comeet-iOS.
WebServerS65
HTTP Server Implementation
A web server that provides main features of an HTTP server including GET, HEAD, execution of CGI scripts and more.
FileSystemCompabilityTester
File System Tool
Tool that finds paths that may cause incomparability issues when copying files from one system to another.
Conways-Game-of-Life
Cellular Automaton
Implementation of Conway's Game of Life, a cellular automaton devised by mathematician John Conway.
PongInC
Classic Game
Implementation of the classic Pong game for UNIX terminals using C signals and cursor library for graphics.
CryptoEncryption
Security Tool
A cryptographic encryption library implementing various encryption algorithms and security protocols.
Education
Harvard University
Master of Arts in Computer Science
The City College of New York (CCNY)
Bachelor of Arts in Economics & Math Minor