Senior Blockchain Developer

Location: Chicago, IL (Hybrid)

Employment Type: Contract / Full-Time

Experience Required: 8 Years

Compensation: Up to $50/hr

We are seeking an experienced Senior Blockchain Developer to design, develop, and deploy secure, scalable, and enterprise-grade blockchain solutions. The ideal candidate will possess deep expertise in blockchain architecture, smart contract development, distributed systems, and application security. This role requires a strong engineering background with the ability to lead technical initiatives and collaborate with cross-functional teams to deliver innovative blockchain-based applications.

• Design, architect, and implement decentralized applications (DApps) and blockchain-based solutions.
• Develop, test, deploy, and maintain smart contracts using Solidity.
• Build and integrate blockchain APIs, middleware, and supporting libraries.
• Design secure, scalable, and highly available blockchain networks and infrastructures.
• Develop oracle solutions for connecting on-chain and off-chain data sources.
• Implement cryptographic protocols and security best practices to safeguard blockchain applications.
• Conduct code reviews and ensure adherence to software development standards and best practices.
• Collaborate with product managers, architects, and engineering teams to define technical solutions.
• Troubleshoot, optimize, and enhance blockchain performance, reliability, and scalability.
• Mentor junior developers and contribute to technical leadership initiatives.
• Maintain comprehensive technical documentation and development processes.
• Stay informed about emerging blockchain technologies, frameworks, and industry trends.

• Bachelor's Degree in Computer Science, Information Technology, Software Engineering, or a related field.
• 8 years of software development experience.
• Proven experience developing blockchain applications and decentralized systems.
• Strong hands-on experience with Solidity and Smart Contract development.
• Proficiency in Java Spring Boot (mandatory).
• Experience with one or more of the following languages:
• Java
• Node.js
• Python
• GoLang
• Rust
• Strong understanding of cryptography, consensus mechanisms, and blockchain protocols.
• Experience implementing cybersecurity controls and attack mitigation strategies.
• Excellent knowledge of Data Structures, Algorithms, and Software Design Patterns.
• Experience with CI/CD pipelines and cloud deployment environments.
• Strong understanding of Software Development Life Cycle (SDLC) methodologies.

• Experience with AWS and/or Azure cloud platforms.
• Experience building highly resilient, fault-tolerant, and distributed systems.
• Knowledge of Ethereum, Hyperledger, Polygon, Solana, or similar blockchain platforms.
• Experience with DevOps tools, containerization, and microservices architecture.
• Strong communication and leadership skills.

• Local candidates in or near Chicago, IL are strongly preferred.
• No H1B sponsorship available for this position.