Senior Blockchain Developer - Chicago, IL

Job Summary:
Northern Trust is 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 architectures
Knowledge of advanced blockchain frameworks and emerging Web3 technologies

Soft Skills:
Excellent communication and interpersonal skills
Strong analytical and problem-solving abilities
Ability to work independently and within collaborative teams
Leadership and mentoring capabilities
Strong attention to detail
Ability to manage multiple projects simultaneously
Strong organizational and documentation skills
Adaptability to rapidly evolving technologies
Ability to work in fast-paced enterprise environments