Available for senior roles.

RAHUL

7 years building backend systems, LLM-powered agents, and DeFi protocols — from multi-chain platforms to autonomous DevOps orchestration. Production-grade, not prototypes.

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Core Stack

What I build with

Backend & APIs
Backend-heavy systems, microservices architecture, event-driven design, and high-throughput REST/WebSocket APIs.
Node.jsNestJSJava Spring BootKafkaMicroservicesWebhooks
🤖
Agentic AI
LLM-powered agents, RAG pipelines, multi-agent orchestration, and tool-calling into production backends.
LangChainLangGraphOpenAI APIClaude APIpgvector
⛓️
Web3 & DeFi
Smart contracts, DeFi protocols, on-chain monitoring, Uniswap v4 hooks, BSC/Arbitrum/Ethereum.
SolidityHardhatEthers.jsUniswap v4EIP-712
☁️
Cloud & DevOps
AWS, Docker, Kubernetes, CI/CD pipelines, Grafana/Prometheus monitoring, NGINX, Linux.
AWSDockerK8sGrafanaPrometheus
📱
Frontend & Mobile
React, Next.js, Flutter, React Native, Telegram Mini Apps, TypeScript.
ReactNext.jsFlutterReact NativeTMA
🗄️
Databases
PostgreSQL, MongoDB, Redis, MySQL, pgvector for semantic search, query optimization & indexing.
PostgreSQLMongoDBRedispgvector
Work History

Where I've worked

Senior Full Stack & Agentic AI Engineer
Dec 2023 – Present
Ubuntu Tribe · Team Lead / System Architect
  • Architected backend microservices for multi-chain crypto platform — Ethereum, Polygon, BSC
  • Built LLM-powered assistant using OpenAI function calling + RAG (pgvector) for blockchain transaction analysis
  • Developed autonomous on-chain monitoring agents via LangGraph — anomaly detection with automated backend remediation
  • Led AWS deployment with CI/CD, auto-scaling, monitoring, and secure key management
  • Blockchain event listener services with caching and batching — 40% performance improvement
Node.jsLangGraphOpenAIAWSWeb3.jspgvectorReact Native
Senior Full Stack / Backend Engineer
Oct 2023 – May 2024
Sydney Breads · Warehouse Management System
  • Backend services for real-time warehouse management — inventory, dispatch, returns, reconciliation
  • Integrated barcode scanning workflows with backend validation and persistence
  • Scalable AWS infrastructure with high availability and fault tolerance
Node.jsAWSReact Native
Full Stack / Backend Engineer
Feb 2024 – Aug 2024
GroomiGromer · Salon & Spa Platform
  • AI smart booking assistant via OpenAI function calling for NLP appointment scheduling and provider matching
  • Optimized MongoDB queries and indexes — significant API response time improvement
Node.jsMongoDBOpenAIAWS
Full Stack Blockchain Engineer
Feb 2019 – Jan 2021
eZTracker · Blockchain Supply Chain
  • Spring Boot microservices for blockchain-based product traceability and tokenized supply chain verification
  • Integrated smart contracts, Hyperpay payment gateway, and barcode-based verification
Java Spring BootWeb3.jsHyperpay
Selected Work

Things I've built

Agentic AI Systems — Production, not demos
LLM-powered agents embedded in real backend infrastructure. From autonomous on-chain monitoring that triggers remediation workflows, to AI voice call agents and multi-agent DevOps orchestration with tool-calling into AWS and Grafana.
LangChainLangGraphOpenAI FunctionsClaude APIRAG + pgvectorMulti-Agent PipelinesTool Calling
New · 2024
01
Call Agent
NeoLab — AI-powered autonomous call agent. Real-time speech-to-text, intent detection, dynamic LLM response generation, and backend CRM integration for inbound/outbound voice workflows.
Agentic AIVoiceLLMNeoLab
New · 2024
02
AuraNex AI
AI-driven crypto trading platform on BSC Chain powered by ANC Token. AI signal generation, automated trade execution, wallet integration, and real-time on-chain analytics dashboard.
DeFiBSC ChainAI TradingANC Token
New · 2024
03
Uniswap v4 Protocol
Custom Uniswap v4 integration with hooks for dynamic fee adjustment, custom liquidity curves, and MEV protection. Backend services for on-chain event indexing and position management.
DeFiSolidityv4 HooksMEV Protection
New · 2024
04
GrowX
Crypto staking platform + Telegram Mini App on GX Token. Staking pools, reward distribution, referral system, wallet connect, and real-time balance tracking — live on app & Telegram.
StakingGX TokenFlutterTelegram MiniApp
05
AgentOps
Multi-agent orchestration (LangGraph + Claude API) autonomously handling DevOps — log triage, alerting, runbook execution with AWS and Grafana tool-calling.
Agentic AILangGraphDevOps
06
RAG Contract Analyzer
RAG pipeline using pgvector + OpenAI embeddings to extract and query smart contract docs. 45% reduction in review turnaround.
RAGpgvectorBlockchain
07
PerpX — DeFi Trading
Perpetual trading platform with MUX Protocol v3 on Arbitrum. On-chain position management, staking, and secure wallet auth.
DeFiArbitrumSolidity
08
PeaceChat
Flutter therapy platform — Socket.IO real-time chat, FCM notifications, audio calls, and appointment management.
FlutterSocket.IOFCM
09
VIH Messenger
CPaaS backend (Django) with NLP admin panel, error code standardization, webhook enhancements, and production logging.
CPaaSDjangoNLP
10
CryptoPayX
On-chain escrow payment system with backend dispute resolution. Multi-party transaction flows with blockchain anchoring.
EscrowWeb3Node.js
11
ChainVault
Document verification using SHA-256 hashing and blockchain anchoring. Tamper-proof audit trail for enterprise document management.
BlockchainSHA-256Node.js
12
AeroTrack
Real-time baggage tracking backend with push notifications, high-throughput event pipeline, and AWS IoT integration.
IoTAWSReal-time
Get In Touch
Let's build
something great

Open to senior full stack, backend, and agentic AI roles. Let's talk about what you're building.

Rahul Jha - Senior Full Stack and Agentic AI Engineer based in Kolkata India

Rahul Jha is a Senior Full Stack Developer and Agentic AI Engineer with over 7 years of professional experience building production-grade backend systems, LLM-powered autonomous agents, DeFi protocols, and cloud-native applications. Based in Kolkata, West Bengal, India, Rahul is available for senior software engineering roles, contract work, and freelance projects.

Technical Skills and Expertise

Rahul Jha specializes in Node.js development, NestJS framework, Java Spring Boot microservices, RESTful API design, event-driven architecture with Kafka, and backend system architecture. He has extensive experience with Agentic AI systems using LangChain and LangGraph, building RAG pipelines with pgvector and Pinecone, integrating OpenAI API and Anthropic Claude API for production applications, and developing multi-agent orchestration systems.

As a Blockchain and Web3 developer, Rahul has built DeFi protocols, written Solidity smart contracts, developed Uniswap v4 integrations with custom hooks, deployed contracts on Ethereum, BSC Chain, Arbitrum and Polygon networks. He has experience with Hardhat, Ethers.js, Web3.js, EIP-712 authentication, WalletConnect, and MetaMask integration.

Rahul is proficient in React.js, Next.js, TypeScript, Flutter mobile development, React Native, and Telegram Mini App development. He has built and deployed applications on AWS including EC2, S3, Lambda, IAM, CloudFront and CodePipeline. His DevOps skills include Docker, Kubernetes, CI/CD pipelines, Grafana and Prometheus monitoring, NGINX configuration, and Linux server management.

Notable Projects by Rahul Jha

Call Agent by NeoLab - an AI-powered autonomous voice call agent using real-time speech to text and LLM-based response generation. AuraNex AI - a crypto trading platform on BSC Chain powered by ANC Token with AI signal generation. Uniswap v4 Protocol integration with custom hooks for dynamic fees and MEV protection. GrowX - a crypto staking platform and Telegram Mini App on GX Token. AgentOps - a multi-agent DevOps orchestration system built with LangGraph and Claude API. RAG Contract Analyzer - retrieval augmented generation for smart contract documentation. PerpX - a perpetual trading DeFi platform on Arbitrum. PeaceChat - a Flutter therapy platform with Socket.IO. VIH Messenger - a CPaaS backend with Django and NLP admin panel. CryptoPayX - an on-chain escrow payment system. ChainVault - blockchain document verification. AeroTrack - real-time baggage tracking with AWS IoT.

Work Experience

Currently working as Senior Full Stack and Agentic AI Engineer and Team Lead System Architect at Ubuntu Tribe since December 2023. Previously worked on Sydney Breads warehouse management system, GroomiGromer salon booking platform with AI, eZTracker blockchain supply chain platform using Java Spring Boot, and Heal and Recover healthcare platform.

Contact Rahul Jha

Email: rahuljha3246@gmail.com | Phone: +91 6296002855 | LinkedIn: linkedin.com/in/rahul-jha-57006a17a | GitHub: github.com/selfishprogrammer | Location: Kolkata, West Bengal, India

Hire Rahul Jha for full stack development, backend engineering, AI agent development, blockchain smart contract development, DeFi protocol development, Flutter mobile development, AWS cloud architecture, and site reliability engineering in Kolkata India or remote worldwide.