Senior Full Stack Developer

Ironclad Ledger is a blockchain and mobile application development company building secure, scalable digital products. We develop modern web applications and Web3 solutions that connect intuitive user experiences with reliable backend systems and blockchain technology.

About The Role We're looking for an experienced Senior Full Stack Developer to design, develop, and maintain scalable web applications, APIs, and user-facing features. You'll work across frontend and backend systems, collaborate with blockchain developers and designers, and help deliver secure, high-quality digital products.

This is a remote opportunity open to candidates worldwide, with full-time or part-time engagement options (20+ hours per week).

Key Responsibilities

• Build responsive, accessible, and user-friendly web applications.
• Develop and maintain frontend applications using React, Next.js, or similar modern frameworks.
• Design, implement, and maintain backend services and RESTful or GraphQL APIs.
• Work with databases, data models, authentication, and authorization systems.
• Integrate frontend applications with backend APIs, third-party services, and blockchain networks where required.
• Write clean, maintainable, well-tested, and efficient code.
• Identify and resolve performance, reliability, and security issues.
• Participate in code reviews, technical planning, and architecture decisions.
• Collaborate with designers, product stakeholders, and other engineers in a distributed team.
• Document technical implementations and follow software engineering best practices.

Job Requirements

• 3+ years of professional full-stack development experience.
• Strong proficiency in JavaScript or TypeScript.
• Practical experience with React and preferably Next.js.
• Backend development experience using Node.js and a framework such as Express or NestJS.
• Experience designing and integrating REST APIs or GraphQL APIs.
• Working knowledge of SQL or NoSQL databases, such as PostgreSQL, MySQL, or MongoDB.
• Understanding of authentication, authorization, API security, and common web vulnerabilities.
• Experience with Git, collaborative development workflows, and code reviews.
• Familiarity with automated testing, debugging, and performance optimization.
• Strong problem-solving skills and the ability to work independently in a remote environment.
• Good English communication skills.

Bonus Skills

• Experience building Web3 applications or integrating Ethereum and EVM-compatible networks.
• Familiarity with Solidity, smart contracts, ethers.js, or viem.
• Experience with wallet connectivity and libraries such as wagmi or WalletConnect.
• Knowledge of blockchain transaction flows, signing, and on-chain data.
• Experience with cloud platforms, Docker, CI/CD, or infrastructure automation.
• Familiarity with mobile development using React Native or other cross-platform frameworks.
• Experience with AI-assisted development tools such as Cursor.

Compensation & Benefits

• $40-$80+ USD per hour, depending on experience, technical expertise, and engagement scope.
• Fully remote, open to candidates worldwide.
• Full-time or part-time engagement (20+ hours per week).
• Flexible working arrangements and asynchronous collaboration.
• Opportunity to build modern web applications and contribute to innovative blockchain and mobile products.

How to Apply

Please submit your résumé and, if available, links to your GitHub, portfolio, live applications, or other relevant projects.

In your application, briefly describe a full-stack project you've built, the technologies you used, and your specific contributions to the frontend and backend.