Healthcare / Fintech / Distributed systems
I build reliable Java and Spring platforms for high-stakes workflows, including patient scheduling across 15 hospitals and fraud checks at more than 1M transactions per hour.
public class SanjaySanthanam {
private String role = "Backend & Systems Engineer";
private String[] focus = {
"Healthcare", "Fintech", "Applied AI"
};
private String stack = "Java, Spring Boot, Kafka";
public void buildReliableSystems() {
// Let's turn complex workflows into simple products.
}
}My work sits where reliability, domain constraints, and product usability meet. I design APIs and distributed services that stay understandable under load, then work across the stack to make them useful to the people operating them.
I bring production experience in healthcare and financial systems, an M.S. in Computer Science, and published computer-vision research to each problem.
Current focus
Master of Science in Computer Science
Syracuse University
Syracuse, NY
Bachelor of Engineering in Computer Science and Engineering
Anna University
Chennai, India
New Brunswick, New Jersey, United States · Hybrid
Architected a FHIR-compliant microservice using Java 17 and Spring Boot to streamline patient appointment scheduling across 15 hospitals, reducing average booking time by 35% and supporting 24/7 availability.
New York, United States · Remote
Built Spring Boot microservices for real-time credit card fraud checks using Kafka Streams and Oracle, supporting over 1M transactions per hour while improving detection accuracy by 15%.
Jaipur, Rajasthan, India · Remote
Delivered a role-based enterprise HR portal using Java, Spring Boot, Angular, and MySQL, streamlining onboarding workflows and reducing manual HR processing time by 40%.
Production systems built under real operational constraints, plus open-source products you can inspect, run, and use.
Professional systems
Scale, interoperability, security, and measurable operational outcomes.
Healthcare platform · Production
01Designed a FHIR-compliant scheduling microservice in Java 17 and Spring Boot, connecting appointment workflows across a multi-hospital network while keeping booking available around the clock.
Financial systems · Streaming
02Built Spring Boot services around Kafka Streams and Oracle to score credit-card activity in real time, balancing sustained throughput with higher detection accuracy.
Workflow platform · Full stack
03Delivered a role-based HR platform spanning Spring Boot, Angular, and MySQL to consolidate onboarding workflows and remove repetitive manual processing.
Applied ML · Forecasting
04Trained an XGBoost arrival-delay model on the OpenFlights dataset and mapped cascading delays with operational visualizations for schedule planning.
Identity platform · Security
05Built a cloud authentication service with Firebase Auth, Google OAuth, API-key controls, and coordinated React and Node.js flows for safer, faster access.
Open-source builds
Recent public work spanning native desktop, distributed backend, and WebGL.
Local-first PDF workstation
OSS-01A cross-platform, fully offline PDF workstation with native document tooling, on-device AI, a plugin SDK, and a self-hostable server. No uploads, accounts, cloud round-trips, or telemetry.
Distributed URL platform
OSS-02A production-shaped URL shortener with team workspaces, real-time analytics, signed webhooks, token-bucket rate limiting, interactive API docs, and a first-party CLI.
Generative 3D playground
OSS-03A natural-language particle generator with GPU-accelerated rendering, live controls, audio reactivity, post-processing, shareable state, and media export.
Peer-reviewed work in computer vision, deep learning, and intelligent systems.
Publication and citation totals are sourced from Google Scholar.
I'm open to backend, platform, and product engineering conversations. Send an email or review the work behind this portfolio.
New Brunswick, NJ