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Core Blockchain Developer Jobs (NOW HIRING)

... Engineer at Plume, you will be responsible for building end-to-end features, working with cutting ... Design, implement, and maintain the core blockchain network software that powers Plume's validators ...

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Core Blockchain Developer information

What is a core blockchain developer?

Core Blockchain Developers are specialized software engineers responsible for designing, developing, and maintaining the foundational architecture of blockchain systems. They create and optimize the core protocols, consensus algorithms, and security mechanisms that enable decentralized networks to operate effectively. Unlike application developers who build on top of blockchain platforms, core developers work directly on the blockchain’s underlying infrastructure. Their work ensures the network’s efficiency, scalability, and security, making them essential for the evolution and stability of blockchain technology.

What are the key skills and qualifications needed to thrive as a core blockchain developer?

To thrive as a Core Blockchain Developer, you need deep expertise in computer science, cryptography, and distributed systems, often supported by a degree in a related field and experience with blockchain protocols. Proficiency with programming languages such as C++, Go, or Rust, as well as familiarity with blockchain frameworks and tools like Ethereum and Hyperledger, is typically required. Strong problem-solving skills, attention to detail, and effective communication are crucial soft skills for collaborating with other developers and addressing complex technical challenges. These skills ensure secure, efficient, and scalable blockchain infrastructure that meets the needs of users and organizations.

What are some common challenges core blockchain developers face when working on protocol-level changes?

Core Blockchain Developers often encounter challenges such as ensuring backward compatibility during protocol upgrades, maintaining network security, and achieving consensus among distributed stakeholders. Testing and deploying changes require rigorous peer review and extensive collaboration with other developers and the broader community to prevent disruptions. Additionally, developers must stay updated with evolving cryptographic standards and scalability solutions to keep the blockchain secure and efficient.

What is the difference between Core Blockchain Developer vs Blockchain Software Engineer?

AspectCore Blockchain DeveloperBlockchain Software Engineer
Primary FocusDeveloping and maintaining blockchain protocols, consensus algorithms, and core infrastructureBuilding blockchain applications, smart contracts, and user-facing solutions
Required SkillsDeep understanding of blockchain architecture, cryptography, consensus mechanismsProficiency in programming languages, smart contract development, API integration
Work EnvironmentTypically in blockchain development teams, R&D, or core protocol projectsIn software development teams, creating decentralized apps and tools
Industry UsageUsed by blockchain protocol projects, core infrastructure providersUsed by dApp developers, fintech companies, and blockchain startups

While both roles require blockchain knowledge, Core Blockchain Developers focus on building and optimizing the underlying blockchain protocols, whereas Blockchain Software Engineers develop applications and smart contracts on top of existing blockchain platforms.

What cities are hiring for Core Blockchain Developer jobs?

Cities with the most Core Blockchain Developer job openings:

What states have the most Core Blockchain Developer jobs?

States with the most job openings for Core Blockchain Developer jobs include:

What are popular job titles related to Core Blockchain Developer jobs?

For Core Blockchain Developer jobs, the most frequently searched job titles are:

Infographic showing various Core Blockchain Developer job openings in the United States as of September 2026, with employment types broken down into 1% As Needed, 82% Full Time, 15% Part Time, and 2% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution.

Digital Assets Blockchain Java Developer - AVP

Manhattan, NY • On-site

Citigroup Inc.
Banking and Credit Intermediation • 5 - 10K employees

$150 - $200/hr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 10 days ago


Citibank rating

8.4

Company rating: 8.4 out of 10

Based on 179 frontline employees who took The Breakroom Quiz

39th of 176 rated banks


Job description

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

A Digital Assets Platform Blockchain Engineer (AVP) must be a motivated and proactive hands‑on software engineer (Back End, Java Focus), with demonstrated ability and experience working with web applications in production. The successful candidate will be part of the core team contributing to the build and enhancement of our Citi Integrated Digital Assets Platform (CIDAP). The ideal candidate will be a collaborative, driven enterprise developer and team player who can work effectively within a large team of motivated individuals across Citi's software engineering network.

We are looking for candidates who understand how to build the backend of enterprise‑grade web applications. The successful individual should have foundational knowledge of web3 infrastructure, blockchain technology and digital assets, and must be a solid enterprise developer of web applications. Exposure to web3 application development is a plus.

Key Responsibilities
  • Collaborate with team members on implementation approaches for web applications leveraging blockchain technology
  • Contribute to the delivery of functional scope for applications leveraging blockchain technology, meeting established quality standards
  • Support solution engineering efforts to meet stakeholder requirements and expectations
  • Apply best practices and common design patterns for enterprise web applications
  • Apply best practices and common design patterns for web3 applications
  • Use collaborative tools to manage and deliver work effectively within a distributed team
  • Contribute to and maintain technical documentation for code and applications built and maintained
  • Operate as a strong team player and communicate effectively within a distributed team
  • Help identify, resolve, and elevate issues as needed to support timely, on‑budget, and quality project delivery
Qualifications / Experience
  • Bachelor's degree in CS or Engineering; MS in computer science or a related discipline is a plus
  • 4 to 7 years of experience in the full software development and testing lifecycle. Experience from the financial services industry is a plus
  • 3 to 5 years of experience and expertise with backend web development using Java Spring
  • Up to 2 years of experience in web3 application development is a plus
  • Experience developing web applications using asynchronous programming and communication
  • Familiarity with best practices and patterns for reliability, scalability, and performance in web applications
  • Familiarity with web3 libraries like Web3J and Web3JS is a plus
  • Familiarity with common and best practices for web3 applications is a plus
  • Familiarity with Solidity code and best practices is a plus
  • Familiarity with DevOps basics and containerized applications is a plus
  • Familiarity with Agile Methodology and Scrum is a plus
Competencies / Skills
  • Passion for coding
  • Strong team player with the ability to communicate with technical and non‑technical stakeholders at various levels
  • Track record of delivering good‑quality commercial software products with increasing complexity
  • Solid engineering fundamentals (testing, code reviews, code structure, readable and maintainable code)
  • Hands‑on development experience building enterprise‑grade web applications
  • Good computer science fundamentals: working knowledge of data structures, algorithms, and design patterns with the ability to translate them into clean, working code
  • Working knowledge of tools for deployment and application management, such as git, Jira, Jenkins, Helm Charts, etc.
Development Value

You will gain meaningful experience across technologies, businesses, and engineering groups at Citi, with exposure to new and existing methodologies and systems, as well as the opportunity to collaborate with teams around the globe. As a member of the Citi Integrated Digital Assets Platform engineering team, you will work alongside a team of highly motivated, T‑shaped individuals who think creatively and seek innovative opportunities for commercial impact.

You will gain exposure to newly released and upcoming technologies and the ability to contribute positively to business strategies. Working within a dynamic engineering team, you will build visibility across Citi and develop your career within a globally connected organization.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Primary Location:

New York New York United States

Primary Location Full Time Salary Range:

$121,200.00 - $181,800.00

In addition to salary, Citi’s offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

Anticipated Posting Close Date:

Jul 06, 2026

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster.

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What Citibank employees say

Pay

Benefits

Hours and flexibility

Workplace

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Citigroup Inc logo

About Citigroup Inc

Sourced by ZipRecruiter

We live in an increasingly complex world. Companies these days are either born global or are going global at record speed. Business and geopolitics are forging an entirely new dynamic and consumers now expect financial services to be a seamless part of their digital lives. Citi is a bank that’s uniquely positioned for this moment. Through our vast global network and our on-the-ground expertise, we can connect the dots, anticipate change and empathize the needs of our clients and customers in ways that other banks simply cannot. Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress. We have set expectations for how we must act to bring our mission to life. These expectations are at the heart of our Leadership Principles – we take ownership, we deliver with pride and we succeed together.

Industry

Banking and credit intermediation

Company size

5,001 - 10,000 Employees

Headquarters location

New York City, NY, US