Riddle game
Lettersly
A daily web-based riddle game where you spend to solve
Live · BetaTypeScriptD1Cloudflare Workers
Play today's riddleHi, I'm
Siljin Sebastian
Quietly ambitious, loudly curious. Figuring out life one rabbit hole at a time.
On a quest to build that one beautiful product.
What follows is the 10% worth showing. The other 90%, though messy, is a story for another day, preferably over coffee.
Welcome!
Me and my creator!
Product
Shipped products.
Systems that are live, in real use, and driving outcomes.
Customer Support intelligence
AI Suitability Ticket Classifier
Turns raw support ticket exports into a structured map of what customers actually ask for, what data an answer needs, and which of those requests an AI copilot can safely handle
Shipped · In use4 productsLLM pipelineEmbeddingsClustering
Evaluation system
Closed-Loop LLM Evals
The classifier's existing checks validate one guess against another guess
Shipped · In use4 productsPythonOutcome scoringSelf-correction
Builder
AI prototypes.
Things I built - because the best way to understand product is to ship one.
Prior Authorization Workflow
Agentic AI system that turns a free-text prior authorization request into a policy-grounded approve, deny, or pend decision—with low-confidence cases routed to a clinician
Agentic WorkflowRAGMCP
Try it
MBA Tech Club Platform
Led organizational expansion and digital presence as Chief of Staff at McCombs MBA Tech Club, positioning it as a premier resource for MBA students pursuing careers in technology
Web DevelopmentEvent ManagementClub Exapnsion
Visit site
AI Ticket Triage System
Automated support ticket classification and routing system using LLM-powered triage—reducing manual decision time from 5–10 minutes to under 2 seconds
WebhookZendesk IntegrationIssue Triage
Type 2 Diabetes Risk Assessment
Clinical decision support AI that synthesizes patient data and medical evidence to assess Type 2 Diabetes risk with physician-grade confidence scoring
Agentic WorkflowRAGMCP
Try itWork
Research & Projects.
A selection of the problems I've worked on, the decisions I made, and what happened.
RCM Market Strategy
Delivered a market-level strategic assessment of the $23B U.S. Revenue Cycle Management landscape for Waystar
$23B · TAM analyzedHealthcareStrategy
View Deck
Costco Growth Strategy
Conducted a full strategic analysis of Costco's business model and long-term growth potential
$249B · revenue analyzedRetailStrategy
View DeckScreenshot / Mockup
Calibr Health
Pitched a fictional AI-powered behavioral health startup to real venture capitalists
$3.5M · seed round pitchedHealthcare AIVenture
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