Senior Blockchain Developer

3Core Systems, Inc

Blockchain Developer responsible for developing features using blockchain technology in Chicago. Designing secure and scalable systems while collaborating with the engineering team.

Posted 6/17/2026contractChicago • Illinois • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

JavaJavaScriptNode.jsOraclePythonRustSoliditySpringSpring BootSpringBoot

About the role

Key responsibilities & impact

As a Blockchain Developer, you are responsible for developing application features and interfaces using blockchain technology
You will be also responsible for designing and developing a system that is secure, reliable and scalable
Your primary goal for this job role will be designing, implementing, and administering a secure blockchain network
Architect, develop and deploy decentralized applications providing permissioned access to data at both the smart contract and protocol level
Develop & Interacting with Smart Contracts implemented on most common Blockchain/DLT technology platforms
Oracle development (connecting "off-chain" data to the blockchain)
Collaborate closely with the rest of the engineering team to review application requirements, help plan implementation details and estimate delivery timelines

Requirements

What you’ll need

Java Spring Boot experience (5+ Years)
Experience working as a Blockchain Developer or a similar role in the IT department (3+ Years)
Experience leading to a complete understanding of the software development lifecycle (10+ Years)
Expertise in building robust systems (resiliency, fault tolerance, scalability) at scale (10+ Years)
Code in various languages such as Solidity, Java, Node JS, Python, GoLang, Rust and others (3+ Years)
Experience in working with various types of cryptography to secure data (3+ Years)
Outstanding understanding of data structures and algorithms (3+ Years)
Required Minimum Education: Bachelor’s Degree

Benefits

Comp & perks

Must have skills include Cryptography, GoLang, Java, Node JS, Python, SDLC, Spring Boot
13 Months duration
Hybrid work arrangement

ATS Keywords

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Hard Skills & Tools

Blockchain developmentJava Spring BootSolidityNode JSPythonGoLangRustcryptographydata structuresalgorithms

Soft Skills

collaborationleadershipcommunicationplanningestimation