Back to Work

Backend Microservices Platform (Node.js)

Enterprise Social Content Management Platform

GitHub Repository: SamvetaOrg/arjun
Live API: api.samveta.qelaura.com
Deployment: AWS Hosted

Tech Stack

  • Backend: TypeScript, NestJS
  • Databases: MongoDB, MySQL
  • Caching: Redis
  • Cloud: AWS
  • Containerization: Docker
  • Communication: gRPC

Project Overview

Architected and delivered a cloud-native microservices platform designed for enterprise-grade social content management. The platform features robust security, high performance, and scalable architecture to handle multi-tenant workloads efficiently.

Key Technical Achievements

Architecture & Security

  • Microservices Architecture: Designed a modular, cloud-native platform with clear service boundaries and independent deployability
  • JWT-based Authentication: Implemented secure token-based authentication with refresh token rotation
  • Role-Based Access Control (RBAC): Built granular permission system for secure multi-tenant access
  • Multi-tenant Support: Architected data isolation and tenant-specific configurations

API Design & Performance

  • REST & gRPC APIs: Designed dual API protocols supporting both REST for external clients and gRPC for inter-service communication
  • High-throughput Workloads: Optimized for concurrent request handling with efficient resource utilization
  • Database Optimization:
    • Designed optimized schemas for MongoDB and MySQL
    • Implemented indexed query pipelines for fast data retrieval
    • Query performance tuning for complex aggregations

Performance & Reliability

  • Background Job Queues: Implemented asynchronous task processing for long-running operations
  • Caching Layers: Redis-based caching strategy to reduce database load and improve response times
  • Rate Limiting: Token bucket algorithm implementation to prevent API abuse and ensure fair usage
  • Performance Stability: Ensured consistent performance under concurrent load through load testing and optimization

DevOps & Production

  • Containerization: Dockerized all microservices for consistent deployment across environments
  • AWS Deployment: Production deployment on AWS with auto-scaling and high availability
  • CI/CD Pipeline: Automated testing, building, and deployment workflows
  • Structured Observability: Implemented logging, monitoring, and alerting for production systems
  • Health Checks: Service health monitoring and automatic recovery mechanisms

Technical Highlights

Microservices Communication

  • gRPC for Internal Services: High-performance binary protocol for service-to-service communication
  • REST for External APIs: Standard HTTP/JSON APIs for client applications
  • Message Queues: Asynchronous communication patterns for decoupled services

Data Management

  • Polyglot Persistence: MongoDB for flexible document storage, MySQL for relational data
  • Data Consistency: Implemented distributed transaction patterns where needed
  • Cache Invalidation: Smart caching strategies with automatic invalidation

Security Features

  • Authentication: JWT with secure token storage and rotation
  • Authorization: Fine-grained RBAC with role hierarchies
  • Data Encryption: Encryption at rest and in transit
  • API Security: Rate limiting, input validation, and SQL injection prevention

Performance Metrics

  • Handles high-throughput workloads with optimized database queries
  • Reduced response times through multi-layer caching
  • Stable performance under concurrent load with rate limiting
  • Horizontal scalability through containerized microservices

Development Practices

  • TypeScript: Type-safe development with strong typing
  • NestJS Framework: Modular architecture with dependency injection
  • Testing: Unit tests, integration tests, and end-to-end testing
  • Code Quality: ESLint, Prettier, and code review processes
  • Documentation: API documentation with Swagger/OpenAPI

This project demonstrates expertise in building production-grade microservices platforms with a focus on security, performance, and scalability.