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Kollens

A healthcare knowledge platform initially built as TreasureTell, evolved into Kollens. Connects patients with verified medical experts, provides an AI-powered health assistant, structured patient management, activity audit trail, advanced analytics, and a dual (admin + expert) portal architecture.

Role: Full Stack Developer Type: Internal / Client Platform Year: 2024–2025 Status: Internal Deployment
Next.jsMongoDB AWSAI / NLP LLM IntegrationJWT Auth RBAC
Expert Directory

Patients browse verified medical specialists by specialty. Expert profiles show ratings, consultation count, affiliated hospital, and areas of expertise. Consultation booking flows directly from the directory.

kollens.app / experts
Patient
🏠 Home
👥 Experts 247
🤖 AI Assistant
👤 My Patients
Activity
📊 Reports
🔔 Activity 3
⚙ Settings
Admin
🛡 Admin Portal
Expert Network: Specialists
Filter ▾
+ Add Expert
RS
Dr. Rajeev Sharma
Cardiology
AIIMS New Delhi
★ 4.9
Rating
1,284
Consults
● Active
Status
Request Consultation
PS
Dr. Priya Singh
Neurology
Apollo Hospitals
★ 4.7
Rating
987
Consults
● Active
Status
Request Consultation
AM
Dr. Arun Mehta
Oncology
Tata Memorial
★ 4.8
Rating
2,156
Consults
● Active
Status
Request Consultation
AI Assistant

LLM-powered health assistant that understands natural language health queries, recommends relevant specialists from the network, and surfaces evidence-based answers, all within the platform context.

kollens.app / ai-assistant
Chat History
Find cardiology experts
Hypertension management
Drug interaction check
Pre-op assessment query
Pediatric dosage help
Kollens AI
Available
U
I'm looking for top cardiologists available for consultation this week.
K
I found 3 cardiologists in our network currently accepting consultations.
Recommended Specialists
RS
Dr. Rajeev Sharma
Cardiology · AIIMS Delhi · ★4.9
Consult
NK
Dr. Nisha Kapoor
Cardiology · Fortis · ★4.6
Consult
U
Can you explain what interventional cardiology covers?
Send ↑
Key Features
👥
Expert Network
Verified specialist directory with specialty filtering, ratings, consultation history, and availability status.
🤖
AI Health Assistant
LLM-powered conversational assistant. Understands medical queries and recommends platform-verified experts.
🗂
Patient Management
Structured patient lists, case notes, and consultation history attached to each patient profile.
🔍
Activity Audit Trail
Full immutable audit log of user actions (expert views, consultations, admin changes) for compliance.
📊
Reports & Analytics
Expert utilization metrics, consultation trends, and patient engagement analytics for platform insights.
🛡
Dual Portal
Separate admin and expert portals. Admin manages the platform; experts manage their own profiles and patients.
☁️
AWS Infrastructure
File storage, image uploads, and scalable compute via AWS S3 and managed Node.js deployment.
🔐
JWT + RBAC
Role-based access control ensures patients, experts, and admins only access their permitted platform areas.
Technical Breakdown
Next.js
App Router with server components for data-heavy views, client components for the interactive AI chat and expert directory.
MongoDB
Document model for experts, patients, consultations, audit events. Aggregation queries power the dashboard analytics.
LLM / AI APIs
LLM integration for the health assistant, with system prompts grounding responses to the verified expert network.
AWS S3
Profile images, documents, and consultation attachments stored on S3 with signed URL generation for secure access.
JWT Auth
Stateless authentication with role claims. Middleware enforces portal-level access restrictions on every protected route.
Audit Engine
Event-sourced audit log using MongoDB with indexed timestamps. Immutable append-only writes for compliance requirements.
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