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MERN Developer & Blockchain Developer (Web3)

Qureos

Software Engineering

Posted on Apr 23, 2026

About Us
PeptideScore.com is an emerging platform at the intersection of data analytics, modern web technologies, and blockchain. Our mission is to build a scalable and innovative product that leverages decentralized technologies to deliver real-world value.

1. Full-Stack MERN Developer

Responsibilities

Design, build, and maintain scalable web applications using MongoDB, Express.js, React, and Node.js
Develop and integrate RESTful APIs and third-party services
Ensure application performance, security, and responsiveness
Collaborate with cross-functional teams including designers and blockchain developers

Requirements

Proven experience with the MERN stack
Strong understanding of API development and authentication (JWT/OAuth)
Experience with cloud platforms (AWS, GCP, or similar)
Familiarity with Git and modern development workflows

2. Blockchain Developer (Web3 / Smart Contracts)

Responsibilities

Develop and integrate blockchain-based features into the platform
Write and deploy smart contracts
Collaborate closely with frontend and backend teams

Requirements

Experience with Solidity and Ethereum or EVM-compatible blockchains
Knowledge of cryptocurrency/payment integrations
Understanding of blockchain security best practices

See more open positions at Qureos