Qureos

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Mern/Blockchain Developer

Lahore, Pakistan

About the Role

We are seeking an experienced Blockchain Developer with strong proficiency in the MERN stack and hands-on experience with blockchain integrations. The ideal candidate will be responsible for building scalable web applications, developing backend APIs, and integrating blockchain functionalities into modern web platforms.

Key Responsibilities

Develop and maintain responsive front-end applications using Next.js and React.js

Build and manage Node.js / Express.js backend services and RESTful APIs

Integrate third-party APIs for authentication, payments, and blockchain data

Work with EVM-compatible blockchains (Ethereum, BSC, Polygon) and Solana

Implement smart contract interaction layers using web3.js, ethers.js, or solana/web3.js

Collaborate with cross-functional teams to design and deploy production-grade decentralized applications (dApps)

Optimize application performance, scalability, and security

Requirements

Minimum 3 years of professional experience with the MERN stack (MongoDB, Express, React, Node)

Strong command of Next.js and frontend performance best practices

Experience integrating third-party APIs and working with WebSocket connections

Solid understanding of blockchain fundamentals, wallets, and smart contracts

Proficiency in web3.js, ethers.js, or solana/web3.js

Familiarity with Git-based workflows, CI/CD pipelines, and deployment tools (Vercel, AWS, or Docker)

Preferred Qualifications

Experience with DeFi, Tokens, NFTS, or tokenization projects

Proficiency in TypeScript

Knowledge of cloud infrastructure and database design

Understanding of security practices and blockchain transaction handling

Job Type: Full-time

Work Location: In person

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