Hey, I'm

Sean Roshan

Principal Full-Stack Architect

I architect and ship scalable web platforms with a focus on performance, reliability, and clean system design.

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About Me

Clear thinking. Scalable systems.

Principal Full-Stack Architect with 10+ years designing scalable platforms across healthcare, fintech, and logistics. I own architecture end-to-end, from system design and API contracts to cloud infrastructure and production delivery, making the technical decisions that keep systems fast, reliable, and easy to evolve. I've shipped AI-powered products from concept to production, automated credentialing pipelines that cut processing time by 99%, and modernized legacy systems without a single service disruption.

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Technologies I Work With

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Featured Work

Projects that push boundaries

Legacy Modernization – Spring Boot & Angular Migration

Completed

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Legacy Modernization – Spring Boot & Angular Migration

2019

Modernized a legacy Apache Wicket platform using Spring Boot, Angular, and Docker Swarm, delivering scalable, modular full-stack applications.

AngularJavaJavascriptSpring Boot+7

Skills & Expertise

Technologies I work with

32+ tools and technologies across the full stack, from pixel-perfect frontends to scalable infrastructure.

React / Next.js

TypeScript

Vue / Nuxt

CSS / Tailwind

Animation (GSAP / Motion)

WebGL / Three.js

Career Journey

Where I have been and what I have built

2019 — Present

Senior Full-Stack Developer

DentalXChange

Leading full-stack development of healthcare technology products at DentalXChange, architecting scalable microservices, AI-powered automation systems, and distributed event-driven platforms that dramatically reduced processing times and modernized legacy infrastructure.

Automated the dentist credentialing pipeline using Node.js, Express, and Puppeteer, achieving a 99% reduction in processing time and transforming a manual bottleneck into a high-throughput workflow
Designed and launched Eligibility AI, a full-stack product automating eligibility verification end-to-end — from React frontend through Node.js APIs to a distributed, event-driven backend powered by SQS and async workers on AWS EKS
Architected scalable microservices with Spring Boot, containerized with Docker, and deployed behind Nginx load balancers in a high-throughput production environment
Built centralized observability infrastructure integrating Fluent Bit and AWS Athena for logging, audit trails, and advanced monitoring across distributed services
Modernized a legacy Apache Wicket codebase, upgrading critical components without service disruption while maintaining business continuity
Collaborated cross-functionally with product, DevOps, and QA to ship performant software under tight deadlines

2018 — 2019

Full-Stack Software Developer

Freightgate

Built full-stack enterprise applications for a logistics technology company, developing email systems, data mining pipelines, and automated document generation services across Node.js, Python, and Java.

Designed and built a complete email application from backend to frontend, implementing RESTful APIs with Node.js, Express, and MySQL while handling IMAP/SMTP protocol integration
Developed a multi-format data mining system using Node.js, Puppeteer, and Python capable of extracting and processing data from HTML, PDF, CSV, and Excel sources
Built an automated PDF generation service with Java, J2EE, and Tomcat, streamlining document workflows
Delivered a polished email client UI using Sencha ExtJS integrated with custom backend services

2018 — 2025

Instructor

EdX

Delivered live, project-based full-stack development instruction through world-leading universities via 2U, training 500+ students across 14 cohorts and 4 countries over nearly 7 years with a 4.9/5 NPS rating while continuously evolving curriculum from traditional web development through AI-assisted engineering.

Trained 500+ students across 14 cohorts in full-stack MERN development through top-tier university programs including the University of Toronto, delivering instruction across the USA, Canada, Mexico, and the UK
Achieved a 4.9/5 NPS rating while teaching remotely across 4 countries and multiple time zones
Maintained a nearly 7-year tenure adapting curriculum across multiple technology shifts — from traditional REST APIs through to AI-powered development with OpenAI and LangChain
Led advanced workshops on production-grade topics including Stripe payment integration, Redux state management, and CI/CD pipelines with GitHub Actions and CircleCI
Instilled engineering best practices by teaching TDD workflows with Jest and Cypress and supervising student projects through full deployment pipelines
Introduced AI-assisted development modules, guiding students in building applications with OpenAI APIs and LangChain for natural language workflows

2015 — 2018

Software Engineer

University of California, Riverside

Contributed to high-performance computing research by building GPGPU simulation tools in C++ and Java, and developing automated data analysis pipelines in Python that dramatically accelerated researcher workflows.

Enhanced the GEM5 simulator to support GPGPU research performance testing, enabling more accurate architectural benchmarking
Built a custom data visualizer in Python that automated data gathering, categorization, and analysis — cutting researcher analysis time by 90%
Developed GPGPU simulation components in C++ to support parallel computing research
Streamlined the research-to-insight pipeline by replacing manual data workflows with automated visualization tooling

2012 — 2013