Kaushal Sadhu
Senior Full Stack Blockchain Developer | Technical Lead
AI, Backend & Scalable Systems
Professional Summary
Senior Full Stack Blockchain Developer with 10+ years of experience building scalable backend systems, decentralized platforms, and AI-integrated applications for production environments.
Deep expertise across DLT and blockchain ecosystems including Ethereum, Polygon, Binance Smart Chain, Tron, Polkadot, Hedera, and Solana, with strong smart contract and DApp delivery using Solidity, Rust, Web3.js, Ethers.js, and Substrate.
Strong backend and infrastructure background spanning Node.js, NestJS, Golang, PHP, distributed storage, and cloud architecture, including IPFS and IPFS Cluster operations, microservices, API design, performance tuning, high availability, and fault-tolerant system design.
Hands-on delivery across fintech, crypto, and AI workflows including payment gateways, wallet integrations, NFT marketplaces, DeFi, DEX, CEX, chatbots, automation pipelines, and RAG-based semantic search powered by OpenAI and LLM APIs.
Quick Info
Skills & Technologies
Blockchain & Web3
IPFS & Storage
Backend & Full Stack
PHP Ecosystem
Databases & AI
DevOps & Cloud
APIs & Integrations
Experience
- Providing blockchain infrastructure consulting for decentralized storage systems
- Designing IPFS cluster replication strategies and storage optimization
- Developing Go backend services for secure file streaming and IPFS integrations
- Advising on validator node setup and distributed system architecture
- Cloud provisioning and performance tuning (AWS / Nginx / HAProxy)
- Led design, operation, and optimization of IPFS and IPFS Cluster–based distributed storage infrastructure for production workloads
- Managed high-volume pin queues, replication strategies (min/max), and recovery workflows across multi-node clusters
- Architected hybrid SSD and HDD storage systems to balance performance, scalability, and cost efficiency
- Developed Go (Golang) backend services for secure file streaming, chunked downloads, encrypted content handling, and IPFS integration
- Managed and operated Polkadot Substrate-based blockchain nodes including validator and boot nodes
- Worked with Substrate consensus components including Aura, GRANDPA, and ImOnline
- Implemented and managed load balancers (Nginx / HAProxy / cloud LB) to ensure high availability
- Troubleshot production issues related to disk I/O bottlenecks, bandwidth constraints, and network latency
- Developed dynamic and interactive websites significantly boosting traffic, page views, and user experience
- Delivered blockchain solutions including ICO websites, node and master node setup, crypto API integration, and Solidity smart contract development
- Expertise in ERC20, ERC721, and ERC1155 standards for token creation and NFT development
- Designed and deployed DApps with smart contracts for NFT marketplaces and DeFi protocols
- Implemented payment gateways such as PayPal, Stripe, and Authorize.net
- Managed domain and hosting services including SSL certificates, AWS, WHM, cPanel, Plesk, DNS
- Worked on advanced PHP/MySQL binary and unilevel MLM systems
- Implemented SDLC methodologies and used project management tools like Asana, Trello, and JIRA
Education
Ready to collaborate?
I'm open to senior engineering and technical leadership roles across blockchain, backend architecture, AI-enabled products, and scalable platform development.