Yatri – Active Development | Niranjan Sah

Active Development

Yatri is an enterprise-grade, realtime mobility infrastructure platform designed to modernize Nepal's public transportation ecosystem. Unlike conventional ticket booking applications, Yatri serves as a digital infrastructure layer that connects passengers, transport operators, enterprises, and government agencies through a unified, data-driven platform for intelligent mobility management. The platform focuses on solving fragmented transport operations by integrating realtime tracking, digital ticketing, fleet operations, analytics, and regulatory oversight into a single ecosystem.

The Problem

Public transportation in Nepal still relies heavily on manual operations, leading to fragmented systems and poor passenger experiences. Some of the major challenges include:

Manual ticket booking and operator workflows.
No reliable realtime vehicle tracking.
Lack of seat availability visibility.
Limited operational insights for transport operators.
Poor monitoring and compliance tools for regulatory authorities.
Revenue leakage due to disconnected systems.
Absence of centralized transport data for planning and decision-making.

Yatri addresses these challenges by building a unified digital infrastructure that powers the entire transportation lifecycle rather than solving only one part of the problem.

Platform Ecosystem

Yatri consists of three interconnected platforms that share a common backend infrastructure and data model.

🚍 Yatri (Passenger Platform)

The passenger application focuses on delivering a modern travel experience through:

Route discovery and intelligent search
Live GPS bus tracking
Accurate ETA prediction
Digital ticket booking
Seat availability visualization
Secure digital payments
QR-based boarding
Journey history
Boarding and delay notifications
Trip status updates

🚌 YatriX (Operator Platform)

Built for transport companies and fleet operators, YatriX provides tools for managing day-to-day operations, including:

Fleet management
Vehicle lifecycle management
Driver and conductor management
Branch management
Route and schedule management
Trip dispatching
Revenue monitoring
Booking operations
Pricing management
Operational analytics
Performance monitoring
Multi-level organization management

Agents operate within YatriX through a permission-based role system rather than as a separate platform.

🏛️ Yatri Nexus (Enterprise)

Yatri Nexus provides a centralized operational intelligence platform for enterprises and government agencies with features such as:

Fleet-wide monitoring
Compliance management
Transport analytics
Operational intelligence dashboards
System health monitoring
Organization oversight
Route analytics
Audit reporting
Data-driven transport planning

Its purpose is to improve transparency, operational efficiency, and policy decision-making across the transport ecosystem.

Core Features

Realtime Vehicle Tracking

One of the platform's core capabilities is realtime GPS tracking that enables passengers and operators to monitor vehicle locations with minimal latency. The tracking system supports:

Live vehicle positions
Vehicle speed and heading
ETA calculation
Geofencing
Route progress
Vehicle status updates
Passenger notifications
Realtime operational dashboards

The GPS pipeline is designed with adaptive telemetry to optimize location update frequency based on driving conditions while minimizing unnecessary network traffic.

Smart Booking System

The booking engine manages the complete reservation lifecycle, including:

Intelligent route search
Seat availability
Dynamic seat selection
Booking confirmation
Digital ticket generation
Booking lifecycle management
Cancellation policies
Payment integration

Fleet Management

Yatri enables transport operators to manage their entire fleet from a unified dashboard, including:

Vehicle registration
Driver assignments
Conductor assignments
Route scheduling
Fleet monitoring
Maintenance workflows
Operational reporting
Revenue tracking

Digital Payments

The platform integrates Nepal's leading payment gateways, enabling secure cashless transactions through:

Khalti
eSewa
Fonepay

Notifications

A centralized notification system keeps passengers and operators informed through:

Boarding reminders
Delay notifications
Cancellation alerts
Trip status updates
Operational announcements
Email and realtime notifications

AI & Smart Transport

The platform is designed to support intelligent transport capabilities, including:

ETA prediction
Demand forecasting
Route optimization
Operational analytics
Transport intelligence
Business insights

System Architecture

Yatri follows an API-first, realtime-first, and event-driven architecture built around a modular monolith.

Key architectural principles include:

Modular Monolith Architecture
Event-Driven Communication
Realtime-first Design
Organization-scoped Multi-tenancy
Infrastructure-grade Observability
Defense-in-depth Security
API-first Development
Operational Simplicity

Instead of prematurely adopting microservices, the platform is designed to scale by extracting services only when operational demands justify the additional complexity.

Technical Highlights

During development, I have been designing and implementing several core engineering systems, including:

Realtime Infrastructure

WebSocket-based communication
Live vehicle tracking
Realtime passenger updates
Live operator dashboards
Event broadcasting
Redis-backed scaling

Geospatial Computing

Location indexing
Route management
Geofencing
Distance calculations
Nearby vehicle search
PostGIS spatial queries

Backend Engineering

Modular backend architecture
Event-driven processing
Queue-based background jobs
Secure authentication
Multi-tenant organization management
Role-based authorization
Audit logging
REST API development

Performance Engineering

Redis caching
Background workers
Queue processing
Optimized database queries
Adaptive telemetry
Rate limiting
Session management

Security

JWT authentication
HttpOnly cookie sessions
Refresh token rotation
Argon2 password hashing
Organization isolation
Permission-based RBAC
Audit trails
Secure API architecture

Observability

The platform is built with production-grade monitoring from day one:

Application metrics
Distributed tracing
Centralized logging
Error monitoring
Performance dashboards
Health monitoring
Queue monitoring

Technology Stack

Backend

NestJS
TypeScript
PostgreSQL
PostGIS
Redis
BullMQ
Socket.IO

Frontend

Next.js
React
Tailwind CSS
ShadCN UI

Mobile

Flutter
Riverpod

Infrastructure

Docker
Docker Compose
Nginx

Observability

Prometheus
Grafana
Loki
OpenTelemetry
Sentry
Uptime Kuma

Payments

Khalti
eSewa
Fonepay

Authentication

JWT
Argon2id
HttpOnly Cookies
Refresh Token Rotation
RBAC

Engineering Challenges

Some of the most interesting engineering problems being addressed include:

Designing a scalable realtime transport infrastructure.
Building low-latency GPS tracking pipelines.
Managing geospatial data efficiently using PostGIS.
Implementing adaptive telemetry for efficient GPS updates.
Supporting multiple user types within a single multi-tenant architecture.
Maintaining secure organization-level data isolation.
Building reliable event-driven workflows for bookings, tracking, and notifications.
Creating production-ready observability for monitoring application health and system performance.

Vision

The long-term goal of Yatri is to become the digital foundation for public transportation by enabling safer journeys, smarter fleet operations, intelligent transport planning, and data-driven governance. The platform is designed to evolve from a corridor-based transport solution into a national mobility infrastructure that can scale across Nepal and other emerging markets. As described in the project documentation, "Yatri is infrastructure, not an app."