Senior Blockchain Developer - Chicago, IL (Hybrid)

Job Title: Senior Blockchain Developer
Location: Chicago, IL (Hybrid)
Duration:13 Months
No C2C Only W2

Job Summary:

Seeking a highly experienced Senior Blockchain Developer to design, develop, and deploy secure, scalable, and resilient blockchain-based solutions. This role will focus on developing decentralized applications (dApps), smart contracts, blockchain integrations, and secure distributed ledger technologies while ensuring enterprise-grade performance, fault tolerance, and security. The ideal candidate will have extensive experience in blockchain development, strong expertise in Java Spring Boot, deep knowledge of cryptography, and the ability to develop across multiple programming languages including Solidity, Java, Node.js, Python, Golang, and Rust. The candidate must also possess a strong understanding of the Software Development Lifecycle (SDLC), cybersecurity principles, data structures, and algorithms.

Key Responsibilities:

• Architect, develop, and deploy decentralized applications (dApps) with permissioned access to enterprise data.
• Design, implement, and administer secure, scalable, and reliable blockchain networks.
• Develop and interact with smart contracts across leading Blockchain and Distributed Ledger Technology (DLT) platforms.
• Design and implement blockchain protocols and application features.
• Develop Oracle solutions to connect off-chain data sources with blockchain networks.
• Build integration libraries and APIs to interface with enterprise applications and backend services.
• Develop secure, fault-tolerant, and highly scalable blockchain systems.
• Collaborate with engineering teams to gather requirements, estimate effort, and deliver high-quality solutions.
• Participate in architecture reviews and technical design discussions.
• Mentor and guide development teams on blockchain best practices and emerging technologies.
• Prepare and maintain technical documentation related to blockchain development processes.
• Ensure compliance with digital payment security and data protection regulations.
• Deploy and manage applications using CI/CD pipelines and cloud platforms.
• Stay current with emerging blockchain technologies, cryptographic techniques, and cybersecurity trends.

Required Skills:

• 10+ years of Blockchain Development experience
• 10+ years of Java Spring Boot experience
• Strong understanding of the complete Software Development Lifecycle (SDLC)
• Expertise in blockchain architecture and decentralized application development
• Extensive experience with:
• Solidity
• Java
• Node.js
• Python
• GoLang
• Rust
• Deep understanding of:
• Cryptography
• Data Encryption
• Digital Signatures
• Hashing Algorithms
• Secure Key Management
• Strong experience building:
• Highly Available Systems
• Fault-Tolerant Systems
• Scalable Distributed Applications
• Advanced knowledge of:
• Data Structures
• Algorithms
• Strong understanding of:
• Cybersecurity Frameworks
• Security Protocols
• Blockchain Security
• Digital Payment Security Standards
• Experience with:
• Smart Contract Development
• Oracle Development
• API Integration
• Distributed Ledger Technologies (DLT)
• CI/CD Pipelines
• Excellent problem-solving and software engineering skills

Preferred Qualifications:

• Bachelor's Degree in Information Technology, Computer Science, or related field
• Experience with cloud platforms:
• AWS
• Microsoft Azure
• Experience deploying blockchain applications in cloud environments
• Exposure to enterprise financial services platforms
• Experience with modern DevOps practices and cloud-native architecture
• Knowledge of advanced blockchain frameworks and emerging Web3 technologies.