Blockchain Developer

Location: Remote/Flexible

Start Date: ~1 week from offer

Experience Level: Mid–Senior

Employment Type: Freelancer/Contract

Company Overview

Founded in 1989, they provide IT consulting and software development services. Clients respect them for unfailing budget and time control, cooperation transparency, and consistently high service quality.

About the Project

They are seeking a highly skilled Blockchain Developer to design, build, and integrate Web3 technologies. This role includes developing scalable services, contributing to front-end components, and supporting decentralized application workflows.

They maintain their platform with a strong focus on backend Node.js development and are looking for developers who actively use cryptocurrencies in their daily lives and trading, not just professionally. Hands-on experience with trading or other real-world crypto activities is essential, as it enables developers to identify and fix intricate issues when implementing blockchain technologies at the core of their platform.

Tasks

Day-to-Day Responsibilities

• Build and maintain scalable microservices using Node.js, JavaScript, and REST APIs


• Design and integrate blockchain-enabled backend services, including smart contract interactions and transaction workflows


• Work with Web3 libraries (Ethers.js / Web3.js) to interact with blockchain networks and wallets


• Contribute to front-end development using HTML, CSS, JavaScript, and TypeScript


• Support monitoring dashboards and internal systems through backend workflows


• Integrate blockchain APIs and decentralized services into existing platforms


• Participate in Agile ceremonies including story refinement, estimation, standups, and retrospectives


• Troubleshoot, test, and deliver clean, secure, and scalable code


• Work proactively and independently with minimal supervision in a remote environment

Requirements

Must-Haves

• 3–5+ years of full-stack engineering experience


• 4+ years of Node.js experience (NVM, NPM)


• 4+ years of HTML, CSS, JavaScript


• 4+ years of cloud experience (AWS, GCP, or Azure)


• 2+ years working with SQL or NoSQL databases

1+ year experience with blockchain fundamentals, including:

• Web3 concepts


• Wallets and crypto transaction flows


• Smart contract interaction

Hands-on experience integrating with:

• Blockchain APIs


• Web3 libraries


• Decentralized or crypto-enabled systems


• Experience working in an Agile environment (Jira or similar)

Nice-to-Haves

• Experience with distributed systems


• Experience with event-driven architecture


• Exposure to Ethereum, Polygon, or other EVM-compatible blockchains


• Familiarity with security best practices in blockchain applications

Benefits

Expected Compensation

• Compensation: $65 +/hr via bank transfer or cryptocurrency(C2C)


• Performance Bonus: Based on growth and revenue targets


• Equity / Stock Options: Available for senior candidates


• Benefits: Health insurance, paid time off, learning budget, flexible work arrangements (customize as applicable)

Interview Process

• Resume submission to Recruiter


• One-round, 30 minutes technical & coding interview with technical consultant


• Onboarding


• Offer letter