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Blockchain Developer - Remote

CloudPSO

Role overview

Qualifications

  • 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

Responsibilities

  • Design and develop Solidity smart contracts for reward distribution, airdrop claim systems, referral and staking logic, wallet eligibility verification
  • Implement secure claim mechanisms including 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

About the company

CloudPSO logo

CloudPSO

IT Services & IT Consulting

Company details

IndustryIT Services & IT Consulting

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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

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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