Karthick SG
Senior Full Stack Engineer | Node.js, React, AI, Cloud (Azure & AWS)
karthisg.dev@gmail.com
+91 90951 69428 · India (Open to US Remote)
linkedin.com/in/karthisgdotsg
github.com/karthisgk

Senior Full Stack Engineer with 5+ years of experience designing and building scalable, high-availability, cloud-native applications using Node.js, React, and microservices architecture. Strong expertise in distributed systems, system design, API performance optimization, and production deployment across Azure and AWS. Proven impact delivering production-grade systems, reducing deployment time by 83% via CI/CD automation, and building multi-tenant platforms for healthcare and secure identity systems. Experienced in AI-integrated systems including LLM orchestration (Claude, Ollama), MCP-based architectures, and workflow automation. Comfortable working in US time zones (EST/PST overlap).

Core Skills
Languages: JavaScript, TypeScript
Frontend: React, Angular, Redux
Backend: Node.js, Express, NestJS
Databases: MongoDB, PostgreSQL
Cloud: Azure, AWS
DevOps: Docker, CI/CD, GitHub Actions
Architecture: Microservices, Distributed Systems
Messaging: Kafka, Event-driven systems
APIs: REST, OAuth2, JWT
System Design: Scalability, High Availability
AI: LLM, MCP, Ollama, Claude
Automation: n8n workflows
Professional Experience
Senior Software Engineer
2022 – Present
Techversant Infotech
  • Designed and deployed scalable microservices architecture using NestJS and Kafka for healthcare platform serving multiple tenants
  • Reduced deployment time by 83% by implementing automated CI/CD pipelines using GitHub Actions
  • Built high-performance REST APIs optimized for scalability, reliability, and concurrent usage
  • Automated infrastructure provisioning using Azure Bicep enabling consistent production deployments
  • Implemented event-driven distributed systems for real-time data processing and communication
Software Engineer
2021 – 2022
AES Technologies
  • Integrated secure Singpass authentication system for government-grade identity verification
  • Developed scalable backend services using Node.js with OAuth2 and JWT security
  • Built responsive frontend applications using React and Angular
Software Developer
2020 – 2021
DDL Tech Solutions
  • Developed full-stack applications using MERN/MEAN delivering scalable business solutions
  • Optimized MongoDB queries improving performance for high-volume workloads
Key Projects
Education

MCA – KLN College of Engineering

B.Sc IT – Sourashtra College