Software Engineer
Sagar — Software Engineer

About the Author

Sagar

Software Engineer with 7+ years of hands-on experience building scalable, event-driven, and serverless systems on AWS. I specialise in bridging legacy and modern ecosystems, designing multi-tenant SaaS platforms, and crafting robust Angular frontends powered by RxJS.

Currently focused on AWS CDK, Terraform, and Infrastructure-as-Code to make cloud deployments reproducible, auditable, and fast.

AWS CertifiedServerlessAngularNode.jsNx MonorepoCI/CD

Technical Skills

Frontend

  • Angular5+ yr
  • TypeScript5+ yr
  • RxJS5+ yr
  • ReactJS2 yr

Backend

  • Node.js4+ yr
  • PHP / Laravel3 yr
  • Python / Django1 yr

Cloud (AWS)

  • Lambda4+ yr
  • API Gateway4+ yr
  • DynamoDB4+ yr
  • SQS / SNS4+ yr
  • EventBridge4+ yr
  • CloudWatch4+ yr
  • EC2 / S34+ yr

DevOps / IaC

  • AWS CDK3+ yr
  • Terraform3+ yr
  • GitHub Actions3+ yr
  • Docker3+ yr

Architecture

  • Serverless3+ yr
  • Event-Driven3+ yr
  • Multi-Tenant3+ yr
  • Monorepo (Nx)3+ yr

Database

  • PostgreSQL2+ yr
  • DynamoDB2+ yr

Testing

  • Playwright (E2E)1 yr
  • Node.js Tests1 yr

Process

  • Agile / Scrum5+ yr
  • CI/CD5+ yr

Projects

Project 01

Government Sector — POL Client (AWS)

Serverless Middleware for Legacy & Modern Systems

AWS CDKLambdaAPI GatewayDynamoDBGitHub Actions
  • Designed a serverless middleware that converts SOAP requests from legacy systems into JSON for modern services, reducing integration complexity.

  • Built end-to-end AWS CDK stacks for Lambda, API Gateway (private), DynamoDB, IAM, VPC, and CloudWatch dashboards.

  • Secured the platform using WAF IP whitelisting, private API Gateway, and Route 53 inbound resolver for on-prem DNS resolution.

  • Built multi-env CI/CD pipelines via GitHub Actions, cutting manual release effort by 80%.

  • Load tested at 200 TPS sustained for 1 hour with stable Lambda performance.

  • Implemented SQS buffering, Lambda retries, DLQs, and idempotency keys — achieving zero message loss.

  • Created CloudWatch dashboards tracking invocation counts, latency, and errors — reducing troubleshooting time by 40%.

Sub-Project

Centralised Event-Driven Monitoring Platform

EventBridgeSNSSQSCloudWatchTerraform
  • Built a centralised monitoring platform aggregating CloudWatch alarms across distributed systems.

  • Implemented EventBridge → SNS/SQS → Lambda routing orchestrated via Terraform, enabling decoupled alert delivery.

  • Built a metadata enrichment pipeline (severity, owner mapping, runbook links) to reduce investigation time.

  • Automated Microsoft Teams notifications via webhook for real-time on-call delivery.

  • Reduced MTTR by 30% via CloudWatch dashboards visualising alarm trends, latency, and failure patterns.

Project 02

Broker-Dealer Compliance Platform

Angular UI Development — Nx Monorepo

AngularRxJSNx MonorepoPlaywrightPython
  • Contributed to a large-scale compliance platform for representative management, branch audits, and operational oversight.

  • Delivered core features improving workflow efficiency for compliance teams with strict regulatory adherence.

  • Enhanced shared libraries in Nx monorepo, increasing code reuse and reducing duplication.

  • Performed performance profiling and UI optimizations for large datasets using Angular best practices and RxJS patterns.

  • Implemented E2E automated tests using Playwright with Python based on QA-provided test scenarios.

  • Provided mentorship through code reviews and architectural discussions, improving team velocity.

Project 03

Tripshifu

Social E-Commerce Platform for Travel Influencers

DjangoAngularPostgreSQLREST APIsCelery
  • Designed and developed scalable backend services using Django REST Framework for social e-commerce and influencer interactions.

  • Built secure RESTful APIs for auth, trip posts, comments, likes, bookings, and compliance workflows.

  • Implemented RBAC and permission layers for different user roles (influencers, users, admins).

  • Developed dynamic Angular frontend components integrating REST APIs for dashboards, feeds, and profile management.

  • Designed and optimized PostgreSQL schemas including normalization, indexing, and relationships for high-volume social data.

  • Implemented background tasks via Celery for notifications, content moderation, and compliance checks.

  • Ensured backend security through JWT authentication, input validation, and protection against CSRF/SQL injection.

Education

Master of Computer Applications

Graphic Era Hill University · 2018

Architecture & Design

  • Serverless Architecture
  • Monorepo Architecture
  • Nx Workspace
  • Event-Driven Design
  • Multi-Tenant SaaS

Development Methodologies

  • Agile Development
  • SCRUM
  • CI/CD Pipelines
  • Test-Driven Development
  • Code Review Culture
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