SYSTEM ONLINE • BANGALORE, IN • 3.3+ YRS PRODUCTION • 2,300+ COMMITS

Engineering
Digital Reality.

Architecting resilient, high-performance systems. Deep expertise in Full Stack Engineer infrastructure, turning complex product requirements into scalable digital matter.

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01 //
0
Commits Across 6 Services
02 //
0
Concurrent WebSockets (JMeter)
03 //
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SSE Token Latency (AI Stream)
04 //
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Database Query Optimization
REACT•NEXT.JS•TYPESCRIPT•NODE.JS•FASTAPI•RAG ARCHITECTURE•QDRANT•LANGCHAIN•OPENAI•AWS ECS/FARGATE•DOCKER•SOCKET.IO•SSE STREAMING•REDIS•MULTI-TENANCY•SYSTEM ARCHITECTURE•REACT•NEXT.JS•TYPESCRIPT•NODE.JS•FASTAPI•RAG ARCHITECTURE•QDRANT•LANGCHAIN•OPENAI•AWS ECS/FARGATE•DOCKER•SOCKET.IO•SSE STREAMING•REDIS•MULTI-TENANCY•SYSTEM ARCHITECTURE•REACT•NEXT.JS•TYPESCRIPT•NODE.JS•FASTAPI•RAG ARCHITECTURE•QDRANT•LANGCHAIN•OPENAI•AWS ECS/FARGATE•DOCKER•SOCKET.IO•SSE STREAMING•REDIS•MULTI-TENANCY•SYSTEM ARCHITECTURE•
Engineering Dossier // Full Stack Engineer

Full Stack Engineer | React & Node.js | Microservices

FILE: Full_Stack_Engineer.docx [ENCRYPTED: NO]

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[System Profile Overview]
> Full Stack Engineer with 3.3+ years of experience architecting and building scalable web applications. Proficient in React, Node.js, and TypeScript, delivering robust APIs, real-time features, and responsive UIs. Strong background in microservices, multi-tenancy, and cloud deployments on AWS, with a focus on performance and reliability.
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Architectural Case Studies

01 // ARCHITECTURELead Developer
Embeddable AI Customer Support Platform

Production, multi-tenant AI customer-support product embeddable on any business website via a single script tag - shipped end-to-end from AI design through deployment. Each tenant gets an isolated knowledge base, branding, agents, and analytics.

EXECUTION TOPOLOGY
Shadow DOM Widget ➔ SSE Token Stream ➔ Socket.IO Presence ➔ Qdrant Vector DB ➔ LangChain / OpenAI ➔ n8n Webhook
02 // ARCHITECTURELead Author
Communications & Notification Service

Tenant-configurable outbound communications service (SMTP + Microsoft OAuth2) with reusable templates, delivery history, order tracking, and survey workflows - built to plug directly into partner tenants' existing business processes via webhook-driven n8n automation.

EXECUTION TOPOLOGY
Partner Webhooks ➔ Tenant Auth Gateway ➔ Reusable Templates ➔ SMTP + Microsoft OAuth2 ➔ Delivery History Tracker
03 // ARCHITECTUREFeature Owner
B2B Ingredients E-commerce

Integrated the realtime AI support platform into a live Next.js storefront: lazy-loaded chat, presence, auto-assignment, inactivity handling, and error boundaries - deploying a shared platform capability into a distinct customer-facing product.

EXECUTION TOPOLOGY
Next.js Storefront ➔ Lazy-Loaded Chat ➔ Realtime Presence ➔ Dynamic Agent Auto-Assignment ➔ Order Sync
04 // ARCHITECTUREFeature Owner
Sourcing & Supplier Collaboration Platform

Sourcing-price workbench and supplier collaboration workflows with S3-backed document handling, connecting supplier-side business processes to a shared platform backend (React, Python/Django/DRF, Celery).

EXECUTION TOPOLOGY
React Workbench ➔ Django REST API ➔ Celery Task Queue ➔ S3 Document Vault ➔ Sourcing Price Engine

Skills & Tech Stack

Highlighted based on current role focus
Frontend
Core Focus
React
Next.js
TypeScript
Tailwind CSS
Socket.IO (client)
SSE
Backend
Core Focus
Node.js
Express.js
FastAPI
REST APIs
Multi-Tenancy
Microservices
AI / LLM
OpenAI
RAG
LangChain
Qdrant
Agentic AI
n8n
Cloud & DevOps
AWS
Docker
GitHub Actions
Data & Security
MySQL
MongoDB
Redis
Elasticsearch
OAuth2 / OIDC
RBAC / JWT
Languages
JavaScript
TypeScript
Python

Engineering Journey

01 //

Full Stack Developer

Dietary Business Intelligence Pvt. Ltd.
  • ▹Lead author across 6 of 20 production services in a multi-tenant B2B SaaS platform, with 2,300+ authored commits.
  • ▹Led end-to-end delivery of an embeddable AI customer-support platform (React, Node.js, RAG, realtime, integrations) - translating business requirements into tenant-isolated knowledge bases, SSE token streaming, Socket.IO communication, human handoff, visitor presence, SLA timers, and agent assignment.
  • ▹Built reliability and scalability mechanisms: bounded concurrency, leaderless presence, crash-safe background workflows, cache-stampede protection, and tenant-isolated authorization.
  • ▹Integrated OpenAI, LangChain, and Qdrant with Redis, MySQL, MongoDB, n8n, and third-party APIs to connect AI capabilities to business workflows.
  • ▹Load-tested realistic Socket.IO/WebSocket journeys from 20 to 1,000 concurrent connections using JMeter.
  • ▹Implemented fail-closed permissions, tenant isolation, OIDC-based deployment workflows, and host allowlisting.
02 //

Full Stack Developer

Cypress Innovative Solutions
  • ▹Built and maintained React/Node/MongoDB business applications and admin workflows used by 200+ daily active users.
  • ▹Improved report performance by ~50% through backend and data-access optimization; supported testing, AWS services, and production issue resolution.
03 //

Full Stack Developer

Freelance
  • ▹Built a serverless restaurant-ordering platform using React, Python, AWS Lambda, API Gateway, and DynamoDB.
  • ▹Built a MERN-based vehicle service-management platform spanning frontend workflows, backend APIs, and business logic.
04 //

Junior Software Engineer

Neovibe Innovative Technologies
  • ▹Developed Node.js REST APIs and React/Next.js interfaces for web applications.
  • ▹Worked with AWS EC2, S3, and Lambda; remediated security issues including IDOR, XSS, and token exposure.

Education

  • Master of Computer Applications (MCA) — St. Joseph's Engineering College, Mangalore (2019)
  • Bachelor of Computer Applications (BCA) — Srinivas Institute of Management Studies, Mangalore (2017)

Contact

Let's build something great together.

I will get back within 24 hours.
• Email: nikhilsunny35@gmail.com• Phone: +91 9495536652