Sangeeth Kumar Mohan
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14+ years building end-to-end systems — from pixel-perfect UIs to distributed infrastructure — serving 1M+ users daily across telecom, healthcare & finance.
01 — About
Built to ship.
Wired to scale.
Senior Full Stack Engineer with 14+ years of experience building high-performance, user-facing web applications across telecom, healthcare, and financial domains. Specialized in React, Angular, Node.js, and AWS — from pixel-perfect UIs to the distributed systems powering them.
Industries
Education
MBA — Management Information Systems
Lincoln University · Oakland, CA · 2017
MBA — Financial Management
Anna University · Chennai, India · 2013
B.Tech — Information Technology
Anna University · Chennai, India · 2009
Certifications
Years Experience
Daily Users Served
Companies
Industry Domains
Core Stack
02 — Experience
14 years of
shipping at scale.
Click any card to expand details.
Companies shown chronologically.
Senior Software Engineer (Full Stack) — Lead
- Led end-to-end authentication workflows (login, OTP, onboarding) supporting 1M+ daily users across web and partner platforms.
- Reduced end-to-end API latency by ~40% via BFF request consolidation and elimination of redundant IAM calls.
- Implemented Redis TTL-based caching for OTP/session state, dramatically improving response times under high traffic.
- Built secure auth flows using OAuth 2.0, JWT, MFA, and AWS Cognito across a micro-frontend architecture.
- Improved observability using Splunk and OpenTelemetry; influenced architecture across API Gateway, Lambda, DynamoDB, and Kubernetes (EKS/AKS).
Lead Software Engineer
Senior Software Engineer
Software Developer
Software Developer
Software Developer
Staff Consultant
Full career history from 2009 → Request detailed resume
04 — Skills
The full-stack
arsenal.
End-to-end ownership
From designing React component architecture to wiring up AWS Lambda + API Gateway, implementing OAuth 2.0 auth flows, and shipping via ArgoCD — I own the full delivery chain. I've operated across telecom, healthcare, and financial domains with teams ranging from scrappy startups to enterprise orgs serving millions.
03 — Projects
Built from
real experience.
Every project is rooted in a real system
I designed or shipped professionally.
Auth Flow Visualizer
Interactive OAuth 2.0 · OTP · Token Refresh diagrams
An interactive micro-frontend that animates OAuth 2.0, MFA/OTP, and JWT token refresh flows step by step. Built from real-world auth system design experience. Includes a Tamper Mode to simulate expired tokens, invalid OTPs, and revoked sessions — showing exactly where and why flows fail.
Interactive Demo
API Latency Dashboard
A live dashboard visualising the performance impact of Backend-for-Frontend (BFF) request consolidation vs. direct API calls. Shows real-time latency charts, cache hit rates, and request queue depth with Redis integration.
Based on reducing API latency by 40% at T-Mobile
Accessible Appointment Scheduler
A fully accessible patient appointment scheduling app built to WCAG 2.1 AA standards. Keyboard navigable, screen-reader optimised, with full ARIA labelling. Covers booking, rescheduling, cancellations, and reminders.
Based on patient-facing systems built at Kaiser Permanente
Micro-Frontend Shell Demo
A shell application that dynamically loads independent micro-frontends at runtime using Webpack Module Federation. Each MFE has its own repo, CI/CD pipeline, and deploy — but composes seamlessly into a unified experience.
Based on micro-frontend architecture delivered at T-Mobile
More projects in progress — follow on GitHub
05 — Contact
Let's build something
remarkable.
Send a message
Schedule a Meeting
30-min intro call
Skip the back-and-forth. Book a time directly on my calendar and let's talk.
Book a 30-min CallOr reach out directly
linkedin.com/in/sangeethkumarmohan
sangeethkumarmohan@gmail.com
Phone
+1 (510) 771-4567