Blockchain Developer - Remote

About Us CloudPSO is a Information Technology Outsourcing (ITO) company that assists in the acquisition of qualified staff to address complex digital problems in order to increase efficiency, reduce costs, and maintain compliance. CloudPSO was founded in 2017 with an aim to provide businesses with a competent and skilled workforce at any given point in time and from any geographic region. We are a US-based company with headquarters in Dallas (Texas) and a center of excellence in Pakistan. We have over 200 facility seats with an additional Work-From-Home facility. CloudPSO has skillful in-house software development teams with state-of-the-art tools, the latest VOIP technology platform, and secure infrastructure. Our core values consist of client satisfaction, commitment, quality, and transparency. We, at CloudPSO, hunt, analyze, recruit, train, and retain top-notch talent for you to help achieve your business goals. Optimizing mission-critical and day-to-day enterprise IT operations, CloudPSO enables businesses to transform, innovate and scale. Job Description This is a remote position. Role Overview We’re looking for a Solidity Developer to help design and build the smart contract infrastructure powering the project’s reward and distribution systems. You’ll work closely with backend engineers, product leadership, and infrastructure teams to build secure, scalable, and production-ready blockchain systems across multiple EVM networks. This is a high-ownership role suited for engineers who are comfortable working on architecture, security, optimization, and real-world Web3 product challenges. Tech Stack - Blockchain Solidity Hardhat Ethers.js OpenZeppelin - Backend Collaboration Node.js NestJS PostgreSQL Supabase Infrastructure Docker GitHub Actions Vercel IPFS Responsibilities - Design and develop Solidity smart contracts for: reward distribution airdrop claim systems referral and staking logic wallet eligibility verification - Implement secure claim mechanisms: Merkle proof systems signature-based validation role-based permissions - Optimize contracts for: gas efficiency scalability security - Integrate contracts with backend services and event-driven systems - Collaborate with backend and frontend teams on wallet flows and transaction logic - Conduct internal contract reviews and contribute to security best practices - Participate in architecture discussions for multi-chain infrastructure Requirements - 3+ years of Solidity development experience - Strong experience with: Hardhat Ethers.js OpenZeppelin TypeScript - Deep understanding of: smart contract security gas optimization EVM internals upgradeable contracts - Experience deploying and maintaining contracts on EVM chains such as: Ethereum Polygon Arbitrum Base - Experience integrating smart contracts with backend/off-chain systems - Familiarity with: event indexing transaction lifecycle handling wallet authentication flows - Strong Git and collaborative development workflow experience Nice to Have ​ - Experience with: account abstraction EIP-712 signatures relayers / gasless transactions staking or reward systems - Previous work on: airdrop infrastructure high-volume transaction systems Web3 analytics or campaign tooling Security audit experience - Rust or Solana ecosystem familiarity Benefits Medical insurance Company gadgets Paid time off Stock options (ESOP) Competitive salary and benefits package. Opportunities for professional development and growth. Collaborative and innovative work environment. Chance to work on cutting-edge cloud projects. Supportive and inclusive company culture