Blockchain QA Tester

Blockchain QA Tester About the Role We are looking for a skilled Blockchain QA Tester to test and validate our crypto payment gateway platform. The ideal candidate should have hands-on experience with multiple blockchain ecosystems including EVM chains (Ethereum, BNB Chain), Solana, and Bitcoin, along with a strong understanding of crypto transactions, wallets, and APIs. Experience: 3-7 years Salary: 7,00,000-17,00,000 Location: Mumbai (Candidate should be ready to travel Dubai/London) Key Responsibilities Test end-to-end crypto payment flows across multiple blockchains Validate wallet integrations (e.g., MetaMask, WalletConnect, Phantom, etc.) Perform testing on: Native token transfers (ETH, BTC, SOL, etc.) ERC-20 / SPL token transactions Verify transaction status tracking (pending, confirmed, failed) Test multi-chain support (Ethereum, BNB, Solana, Bitcoin, TON, etc.) Validate gas fee calculations, slippage, and edge cases Perform API testing (REST/Webhooks) for payment confirmations Test error handling scenarios (failed transactions, low balance, network issues) Validate security aspects (signature verification, address validation) Work closely with developers to debug and reproduce blockchain-related issues Required SkillsBlockchain Knowledge Strong understanding of blockchain fundamentals Knowledge of transaction lifecycle and confirmations Understanding of gas fees, nonce, signing, and private/public keys Hands-on Experience With EVM chains (Ethereum, BNB, Polygon, etc.) Solana ecosystem Bitcoin transactions (UTXO model) Wallet Experience MetaMask Phantom Bitcoin wallets Technical Familiarity RPC / WebSocket / Webhooks Blockchain explorers (Etherscan, Solscan, etc.) API testing tools (Postman, Curl) Good to Have Experience testing DeFi platforms / payment gateways / exchanges Familiarity with Hardhat, Foundry, or Ganache Experience with testnets (Sepolia, Solana Devnet, Testnet BTC, etc.) Basic scripting knowledge (JavaScript / Python) for automation Experience with cross-chain bridges Test Scenarios Youll Handle Payment success/failure across chains Cross-chain swaps and bridging Fiat-to-crypto and crypto-to-fiat flows (if applicable) High-load transaction testing Edge Cases Double-spend attempts Incorrect addresses Network congestion What Were Looking For Detail-oriented mindset Strong debugging skills Passion for Web3 and blockchain technology Ability to think like an attacker and test edge cases Bonus Experience working on multi-chain wallets or payment gateways Understanding of MPC wallets / custodial vs non-custodial systems Apply now at poonam@swordedgecommercials.com, Subject- Blockchain QA Tester Compensation: 700,000.00 - 1,500,000.00 per year Benefits Food provided Work Location: In person Blockchain QA Tester About the Role We are looking for a skilled Blockchain QA Tester to test and validate our crypto payment gateway platform. The ideal candidate should have hands-on experience with multiple blockchain ecosystems including EVM chains (Ethereum, BNB Chain), Solana, and Bitcoin, along with a strong understanding of crypto transactions, wallets, and APIs. Experience: 3-7 years Salary: 7,00,000-17,00,000 Location: Mumbai (Candidate should be ready to travel Dubai/London) Key Responsibilities Test end-to-end crypto payment flows across multiple blockchains Validate wallet integrations (e.g., MetaMask, WalletConnect, Phantom, etc.) Perform testing on: Native token transfers (ETH, BTC, SOL, etc.) ERC-20 / SPL token transactions Verify transaction status tracking (pending, confirmed, failed) Test multi-chain support (Ethereum, BNB, Solana, Bitcoin, TON, etc.) Validate gas fee calculations, slippage, and edge cases Perform API testing (REST/Webhooks) for payment confirmations Test error handling scenarios (failed transactions, low balance, network issues) Validate security aspects (signature verification, address validation) Work closely with developers to debug and reproduce blockchain-related issues Required SkillsBlockchain Knowledge Strong understanding of blockchain fundamentals Knowledge of transaction lifecycle and confirmations Understanding of gas fees, nonce, signing, and private/public keys Hands-on Experience With EVM chains (Ethereum, BNB, Polygon, etc.) Solana ecosystem Bitcoin transactions (UTXO model) Wallet Experience MetaMask Phantom Bitcoin wallets Technical Familiarity RPC / WebSocket / Webhooks Blockchain explorers (Etherscan, Solscan, etc.) API testing tools (Postman, Curl) Good to Have Experience testing DeFi platforms / payment gateways / exchanges Familiarity with Hardhat, Foundry, or Ganache Experience with testnets (Sepolia, Solana Devnet, Testnet BTC, etc.) Basic scripting knowledge (JavaScript / Python) for automation Experience with cross-chain bridges Test Scenarios Youll Handle Payment success/failure across chains Cross-chain swaps and bridging Fiat-to-crypto and crypto-to-fiat flows (if applicable) High-load tr