HAYDER Abbas — Full-Stack & Blockchain Engineer
Full-stack engineer specialized in wallet infrastructure, crypto on/off-ramp systems, payments, and multi-chain Web3 apps.

I build systems that handle real transactions, real users, and real money — with focus on reliability, security, and performance.

🔧 What I Work On

Custodial & non-custodial wallet flows

Crypto on-ramp / off-ramp integrations

Blockchain data, RPC reliability, webhooks, reconciliation

Cross-chain swaps & bridges 

Admin & monitoring tools for transactions and risk

High-throughput backend services for crypto-fiat platforms

🧱 Tech Stack

Blockchain / Web3
Solidity • Rust • Anchor • Hardhat • Foundry • Ethers.js • Web3.js • Solana Web3.js • WalletConnect • RPC • Subgraph

Backend
Node.js • Go • Python • PostgreSQL • MongoDB • Redis • REST • Webhooks • GraphQL

Frontend
React • Next.js • TypeScript • Tailwind • Redux • Wagmi • RainbowKit

DevOps
Docker • AWS • CI/CD • Git • Unit Testing
🚀 Notable Experience
Bitramp — Crypto On/Off-Ramp

Built wallet infrastructure, transaction processing, KYC/payment integrations, webhook ingestion, reconciliation logic, and admin monitoring tools.

I care about:

Correct state handling in financial flows

Handling failures (RPC, webhooks, providers)

Performance under load

Clean, maintainable architecture

📫 Contact

hayderabs@pm.me

Dubai, UAE