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nawab69/README.md

Who am I ?

A blockchain engineer and full-stack developer with expertise in building secure, scalable Web3 systems. I specialize in multi-chain wallet development, Lightning Network infrastructure, smart contracts, and event-driven microservices. With a strong foundation in cryptography and distributed systems, I create production-grade solutions that merge blockchain, AI, and IoT technologies.

Recent works

1. RenewLink: Decentralized Energy-Sharing Network

A blockchain-powered IoT platform featuring smart meters, energy tokenization, verifiable data streams, and decentralized governance for peer-to-peer energy trading.

2. Cross-Border Payments Mobile Wallet

Multi-chain wallet solution with AI-powered transaction monitoring, compliance automation, and support for BTC, ETH, BSC, Polygon, XRP, and Tron networks.

3. Bitcoin Lightning Infrastructure

Complete Bitcoin infrastructure including Core nodes (mainnet/testnet/signet), Lightning Network (LND, CLN), ElectrumX indexer, custom explorer, and wallet-as-a-service backend.

4. GCBuying – Crypto Asset Trading Platform

A secure and scalable trading platform for digital assets featuring automated wallet management, liquidity optimization, and real-time market operations. Designed using a microservices architecture, the system powers smooth deposits, withdrawals, trading execution, and treasury automation for both web and mobile users.

GCBuying Website

Next.js-powered responsive website with high-performance pages, SEO optimization, and real-time trading indicators. Includes secure user onboarding, KYC integration, and a fully dynamic dashboard connected to the backend trading engine.

GCBuying Mobile Apps

Flutter-based mobile apps for Android & iOS with seamless wallet operations, real-time order status, price alerts, notifications, identity verification, and a streamlined deposit/withdrawal experience. Built with background sync, biometric security, and lightning-fast UI interactions.

Backend & Infrastructure of GCBuying

NestJS microservices with Kafka, Redis, MongoDB, and RabbitMQ ensure high throughput and fault tolerance. Includes multi-chain wallet infrastructure, secure asset management, automated hot/cold wallet flows, admin panel, audit logs, and a production-grade observability pipeline for stability and performance under real-world load.

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Things i {code} with

1. Blockchain & Web3

solidityethereumbitcoinlightning networkweb3.jsethers.jshardhatfoundry

2. Backend & Systems

nodejsnestjsexpresspythongorustmicroservicesevent-driven architecture

3. Frontend

reactnextjstypescripttailwindcssflutter

4. Databases & Messaging

mongodbpostgresqlredisrabbitmqkafka

5. DevOps & Infrastructure

dockerkubernetesnginxawsgoogle cloudterraformci/cd

6. Cryptography & Security

hd walletsmpc/tssencryptionkey managementsecure enclaves

7. Observability & Reliability

opentelemetryotel collectorprometheusgrafanalokielasticsearchkibanasentrybetterstackwinstonpinoalertinguptime monitoring

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Observability Approach

I instrument services with structured logging, metrics, and traces to make production behavior debuggable and measurable. My preferred stack combines OpenTelemetry for distributed tracing, Prometheus + Grafana for metrics, Loki for log aggregation, Sentry for real-time error tracking, and Elasticsearch/Kibana for deep log search and incident forensics. This ensures reliable microservice operations, faster root-cause analysis, and proactive alerting before user-impacting failures.

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Development Philosophy

Security First • Scalable by Design • Decentralization Mindset • Developer Happiness • User-Focused

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⭐ If you like my work, consider starring my repositories!

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  1. subgraph-wrapper subgraph-wrapper Public

    A subgraph wrapper that resolves both ERC721 IPFS metadata and off-chain data by merging The Graph subgraph data with other data sources. It stores metadata locally for faster access and supports G…

    TypeScript 1

  2. escrow-dapp escrow-dapp Public

    A decentralized web Application build for Trading ETH , USDT, BNB (bep20) & BUSD for any digital assets p2p. It will run in both ethereum blockchain and Binnance smart chain.

    Solidity 11 7

  3. block-monitor-tron block-monitor-tron Public

    TypeScript

  4. gmb-backend gmb-backend Public

    TypeScript

  5. note-down note-down Public

    TypeScript

  6. multicone/hooks multicone/hooks Public

    TypeScript