Travel-Focused Social Platform Backend (NestJS)

Backend Engineer

NestJS

Node.js

PostgreSQL

About the Project

In a travel-focused social networking domain, we created a scalable NestJS server that orchestrates everything from user management and authentication to trip planning, social interactions, and location-based services. The primary goal was to offer a unified backend API capable of seamless integration with popular social platforms, robust data handling, and automated workflows—thereby giving travelers a highly engaging experience as they plan, share, and document their journeys.

Role and Responsibilities

Senior Backend Engineer – NestJS

User Management & Security

Designed and implemented role-based access control for granular permissions.

Integrated social logins (Google, Facebook, Instagram, LinkedIn, Twitter, Apple) to streamline authentication.

Deployed secure JWT-based session handling and encryption protocols for sensitive data.

Trip & Itinerary Management

Developed APIs to create, manage, and share trips—including real-time itinerary updates, packing lists, and emergency contacts.

Enabled collaborative trip experiences, allowing users to invite friends and upload memories/photos to a central repository.

Email & Notification Infrastructure

Built an automated email system (with AWS SES and Mailchimp) for welcome messages, password resets, and newsletter campaigns.

Architected a push notification flow via Firebase for alerts and event-based triggers (e.g., new trip invitations).

Created a dynamic template manager for consistent, brand-aligned communication.

Quiz & Compatibility System

Engineered a matchmaking engine that calculates compatibility scores based on user-generated quiz data.

Developed quiz-building tools and implemented logic to recommend potential travel companions.

Invitation & Referral

Integrated Twilio SMS invitations and referral links for easy on-boarding of new users.

Devised social media share endpoints, tracking invitation statuses and referral rewards.

Database Management & Migrations

Planned and executed comprehensive database migrations, data seeding, and backup strategies for zero data loss.

Implemented TypeORM for schema evolution and ensured optimized queries for high-performance data access.

Social & Location Features

Developed follow/unfollow mechanisms, real-time activity feeds, and social interactions for a connected community experience.

Leveraged Google Places APIs for city lookups, location-based trip recommendations, and contextual travel content.

CI/CD & DevOps

Set up continuous integration pipelines with automated testing and linting, ensuring code reliability and reducing release cycles.

Utilized Docker containers for consistent environment replication and facilitated scalable deployment to AWS.

Performance & Scalability

Conducted load testing and profiling to identify bottlenecks, implementing improvements for low-latency responses even under heavy traffic.

Optimized caching strategies and asynchronous queues to handle burst loads in trip creation, notifications, and user interactions.

Technologies and Tools Used

Backend & Framework: NestJS (TypeScript), Node.js

Database & ORM: PostgreSQL, TypeORM

Cloud & Integrations: AWS S3 (media storage), AWS SES (emails), Twilio (SMS, Chat), Mailchimp (email marketing), Firebase (push notifications)

Authentication & Security: OAuth2, JWT, Social Media Auth (Google, Facebook, Instagram, LinkedIn, Twitter, Apple)

APIs & Documentation: Swagger (API docs)

Containerization & Deployment: Docker, AWS EC2/ECS or similar, GitHub Actions/Jenkins (CI/CD)

Monitoring & Logging: AWS CloudWatch, Sentry (error tracking), Winston (logging)

Key Contributions

Advanced Role-Based Access Control Devised fine-grained permissions to differentiate between admin, moderator, and traveler roles, improving security and accountability.

Robust Trip Orchestration Delivered a unified suite of endpoints for itinerary creation, memory/photo uploads, packing list tracking, and emergency contact handling—all under one central service.

High-Volume Email & Notification Delivery Streamlined bulk messaging capabilities and integrated AWS SES with fallback strategies, ensuring reliable outreach to users in real-time.

Compatibility & Social Engagement Built a quiz-driven matching algorithm that promotes user interaction based on shared travel preferences, boosting community stickiness.

Data Integrity & Backup Implemented a disciplined approach to migrations and backups, guaranteeing the safe handling of user and trip data—even during peak loads.

Challenges and Solutions

Complex User Journeys: Multiple entry points (social media, SMS invites, direct sign-up) complicated user flows. Solution: Developed modular authentication layers and dynamic invitation endpoints to ensure a cohesive onboarding experience.

High Traffic & Scalability: Surges in user engagement and trip planning threatened to slow down API response times. Solution: Introduced caching strategies and asynchronous processing for resource-intensive tasks, maintaining a sub-second response rate.

Data Consistency Across Systems: With multiple third-party integrations, ensuring data was never lost or duplicated was critical. Solution: Deployed transactional outbox patterns and robust error-handling mechanisms, maintaining integrity in multi-step operations.

Variable Email Requirements: Different messaging contexts (verification, newsletters, welcomes) required flexible templates and easy updates. Solution: Implemented a template management system that admins could update without code changes, speeding up iteration cycles.

Achievements and Outcomes

Enhanced Travel Experience: Provided a user-friendly platform that fosters collaboration, community building, and effortless trip planning.

Improved Performance: Achieved significant reductions in response times through targeted optimizations, even under surge traffic.

Reliability & Uptime: Maintained near 100% uptime by leveraging Docker containers and automated CI/CD deployments.

Scalable Infrastructure: Positioned the platform to accommodate future growth, with easily extensible APIs and microservices-ready architecture.

Client Impact

Boosted User Adoption: Social authentication and referral invites increased sign-ups, improving the overall user funnel.

Higher Engagement & Retention: Compatibility quizzes and social feeds fostered deeper community bonds and repeat platform visits.

Operational Efficiency: Automated notifications, invites, and emails freed the client’s team from manual tasks, letting them focus on higher-level strategy.

Data-Driven Decision Making: Comprehensive monitoring and analytics provided insight into user behavior, guiding product enhancements.