Full-Stack Developer

4pto.io; United States; Hybrid; USD 90,000 - 150,000; Full time

Benefits offered by this job

Hybrid or remote arrangement in Europe

Job summary

4pto.io is seeking a mid-level full-stack developer to build decentralized applications across multiple blockchain ecosystems. You will work on UI and server-side tasks, connect apps to smart contracts, and collaborate with cross-functional teams to deliver scalable Web3 solutions.

The role emphasizes building interfaces that connect to on-chain backends, improving performance and security, and staying current with Web3 tools and practices.

Qualifications

• At least two years of full-stack development experience.
• Experience with blockchain or Web3 projects.
• Proficiency in JavaScript or TypeScript and Node.js, with React/Next.js/NestJS.
• Experience integrating smart contracts (Solidity or Rust) into web apps.
• Familiarity with Ethereum, Solana, Sui, or Aptos.
• Understanding REST APIs, GraphQL, and Web3 libraries (Ethers.js, Web3.js).

Responsibilities

• Develop and maintain full-stack applications for Web3 use cases.
• Build interfaces that work with smart contract backends.
• Coordinate with blockchain developers to connect front-end features to on-chain functionality.
• Collaborate with other disciplines to design, develop, and deploy decentralized solutions.
• Improve application performance, scalability, and security.
• Keep up with relevant Web3 tools, frameworks, and development practices.

Skills

Full-stack development

Blockchain/Web3 familiarity

REST & GraphQL proficiency

Cross-functional collaboration

Tools

Node.js

React

Next.js

NestJS

Solidity

Rust

Ethers.js

Web3.js

Job description

Role overview

Build full-stack applications and backend systems for decentralized products across multiple blockchain ecosystems. You’ll contribute across the user interface and server side, connect applications to smart contracts, and work with cross-functional colleagues to deliver solutions that perform well and scale.

Responsibilities

• Develop and maintain full-stack applications for Web3 use cases.
• Build interfaces that work with smart contract backends.
• Coordinate with blockchain developers to connect front-end features to on-chain functionality.
• Collaborate with other disciplines to design, develop, and deploy decentralized solutions.
• Improve application performance, scalability, and security.
• Keep up with relevant Web3 tools, frameworks, and development practices.

Requirements

• At least two years of full-stack development experience.
• Previous work on blockchain or Web3 projects.
• Proficiency in JavaScript or TypeScript and Node.js, with experience in a framework such as React, Next.js, or NestJS.
• Experience integrating smart contracts, for example those written in Solidity or Rust, into web applications.
• Familiarity with a blockchain ecosystem such as Ethereum, Solana, Sui, or Aptos.
• Understanding of REST APIs, GraphQL, and Web3 libraries such as Ethers.js or Web3.js.

Benefits and work setup

• Mid-level role with a hybrid or remote arrangement in Bulgaria, Croatia, or Serbia.