Blockchain Developer

As a Blockchain Developer at Blonix, you join the engineering team to develop, integrate, and optimize blockchain-based products and services for modern financial infrastructure. You work on borderless finance solutions that enable seamless movement between traditional and digital assets, with 1.5-2 years of hands-on blockchain experience.

What you'll do

• Develop, integrate, and maintain blockchain-based applications and services.
• Design and implement smart contracts using Solidity and EVM-compatible blockchain networks.
• Work on wallet, token, transaction, and blockchain integrations.
• Integrate blockchain protocols, APIs, RPC endpoints, and third-party Web3 services.
• Develop and maintain secure and efficient blockchain-related backend services using Node.js.
• Perform smart contract testing, debugging, deployment, and basic optimization.
• Work with Web3 libraries such as ethers.js, web3.js, or equivalent tools.
• Integrate blockchain functionality with existing frontend and backend systems.
• Monitor blockchain transactions and troubleshoot failed or delayed transactions.
• Collaborate with backend, frontend, DevOps, QA, and product teams to deliver blockchain features.
• Identify potential security vulnerabilities and follow best practices for secure blockchain development.
• Stay updated with emerging blockchain protocols, tools, standards, and ecosystem developments.
• Contribute to technical documentation and maintain clean, scalable, and maintainable code.

What you bring

• 1.5-2 years of professional experience in blockchain/Web3 development.
• Strong understanding of blockchain fundamentals, transactions, wallets, gas, nodes, and consensus mechanisms.
• Hands-on experience with Solidity and smart contract development.
• A good understanding of Ethereum and EVM-compatible networks.
• Experience working with ethers.js, web3.js, or similar Web3 libraries.
• Understanding of ERC-20, ERC-721, ERC-1155 and other relevant token standards.
• Experience integrating wallets and blockchain APIs.
• Strong understanding of REST APIs and backend integration.
• Proficiency in JavaScript/TypeScript or a similar programming language.
• Familiarity with Git and standard software development workflows.
• Good debugging and problem-solving skills.
• Understanding of blockchain security practices and common smart contract vulnerabilities.

Nice to have

• Experience with Layer 1 and Layer 2 blockchain networks.
• Experience with DeFi, crypto payments, wallets, exchanges, or Web3 financial applications.
• Familiarity with Hardhat, Foundry, Remix, or similar development frameworks.
• Experience with smart contract testing and deployment pipelines.
• Knowledge of blockchain indexing solutions such as The Graph or similar tools.
• Understanding of cross-chain protocols and blockchain bridges.
• Familiarity with Docker and basic cloud/deployment environments.
• Previous experience working in a startup or fast-paced Web3 environment.

What we offer

• Opportunity to work on real-world Web3 and fintech infrastructure.
• Remote-first work environment.
• Flexible schedule.
• Paid sick time.
• Exposure to blockchain, digital assets, and global financial technology.
• Opportunity to work closely with product and engineering leadership.
• Opportunity to contribute to products serving users across different markets.

About Blonix

Blonix builds modern financial infrastructure that enables seamless movement between traditional and digital assets, focusing on borderless finance and giving users a simple and secure way to manage, spend, swap, send, and access their money globally.