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Core Blockchain Developer Jobs in New York (NOW HIRING)

PTR Global

Blockchain Developer

Woodbridge, NJ · On-site

Key Responsibilities Core Protocol Development * Architect and develop a custom blockchain ... Cryptographic Engineering * Implement and optimize privacy-preserving cryptographic primitives ...

Fullstack

Blockchain Engineer

Manhattan, NY · On-site

$200 - $250/hr

The Role As a Blockchain Engineer at Fullstack, you will build the foundational infrastructure that ... You will design and ship core blockchain systems that prioritize reliability, speed, and precision ...

Fullstack

Blockchain Engineer

New York, NY · On-site

$200K - $300K/yr

The Role As a Blockchain Engineer at Fullstack, you will build the foundational infrastructure that ... You will design and ship core blockchain systems that prioritize reliability, speed, and precision ...

Hired Recruiters

Blockchain Engineer

New York, NY · On-site

$120K - $200K/yr

As a blockchain developer, you will design and build core components of a plethora of crypto use cases, taking a 0 to 1 approach in developing new user experiences. You'll propose new ideas on how to ...

PulseRise Technologies

Protocol Engineer

Manhattan, NY · On-site

$150 - $200/hr

Overview We are looking for a senior‑level Protocol Engineer to join a core blockchain team building next‑generation Web3 payments infrastructure. This role focuses on designing and implementing ...

Voiceflow

Protocol Engineer

Manhattan, NY · On-site

$125 - $150/hr

Role Overview We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to ...

MDAEdge

Lead Front End Engineer

Manhattan, NY · On-site

They are seeking a Lead Front End Engineer to join their core blockchain engineering team, where the role involves developing user interfaces for an open-source dashboard and improving developer UX. ...

PulseRise Technologies

Protocol Engineer

New York, NY · On-site

ONSITE ROLE IN NY We are looking for a senior-level Protocol Engineer to join a core blockchain team building next-generation Web3 payments infrastructure. This role is focused on designing and ...

PulseRise Technologies

Protocol Engineer

New York, NY · On-site

ONSITE ROLE IN NY We are looking for a senior-level Protocol Engineer to join a core blockchain team building next-generation Web3 payments infrastructure. This role is focused on designing and ...

fun.xyz

Protocol Engineer

New York, NY · On-site

Role Overview We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to ...

De Circle

Fun.xyz - Protocol Engineer

New York, NY · On-site

Role Overview We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to ...

fun.xyz

Protocol Engineer

New York, NY · On-site

Role Overview We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to ...

fun.xyz

Protocol Engineer

New York, NY

Role Overview We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to ...

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All JobsCore Blockchain Developer JobsCore Blockchain Developer Jobs in New York

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 in New York are hiring for Core Blockchain Developer jobs?

Cities in New York with the most Core Blockchain Developer job openings:

Infographic showing various Core Blockchain Developer job openings in New York as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 17% Part Time, 1% Temporary, and 2% Contract. Highlights an 93% Physical, 3% Hybrid, and 4% Remote job distribution.

Blockchain Developer

Woodbridge, NJ • On-site

PTR Global
See more jobs at PTR Globalexternal

Other

Re-posted 21 days ago

Job description

Position: Blockchain / Protocol Engineer
Location: Iselin NJ
Duration: Contract
Job ID: 177733
Only W2
Are you passionate about blockchain protocols, distributed systems, and applied cryptography? We are seeking a Lead Protocol Engineer to help build a cutting-edge Digital Asset Platform focused on solving one of the biggest challenges in institutional finance-delivering regulatory compliance while preserving transaction confidentiality.
This role sits at the intersection of cryptography, blockchain infrastructure, and high-performance distributed systems, offering the opportunity to design and develop core protocol components from the ground up.
Key Responsibilities
Core Protocol Development
  • Architect and develop a custom blockchain application using Go (Golang), Cosmos SDK, and CometBFT (Tendermint).
  • Design scalable and secure protocol components for institutional-grade digital asset settlement.
Cryptographic Engineering
  • Implement and optimize privacy-preserving cryptographic primitives including:
  • Pedersen Commitments
  • Bulletproofs (Range Proofs)
  • Ensure cryptographic solutions operate without requiring a trusted setup.
Consensus & Distributed Systems
  • Develop custom ABCI++ extensions including:
  • Prepare Proposal
  • Vote Extensions
  • Build and support an on-chain Multi-Party Computation (MPC) mixing network.
State Machine Design
  • Design and maintain custom KVStore state machines.
  • Manage homomorphically encrypted balances using Elliptic Curve cryptography rather than traditional plaintext accounting models.
Performance Optimization
  • Optimize cryptographic operations such as:
  • Scalar multiplication
  • Point addition
  • Improve throughput, latency, and scalability across distributed environments.
Regulatory Auditing Infrastructure
  • Develop secure off-chain query layers.
  • Implement \"view key\" mechanisms enabling permissioned regulatory oversight while maintaining privacy.
Required Qualifications:
  • 5+ years of Software Engineering experience.
  • 3+ years of backend or systems programming experience.
  • Expert-level proficiency in Go (Golang).
  • 1+ year of experience building reliable distributed systems.

Experience with:
  • BFT Consensus Algorithms
  • P2P Networking
  • State Replication
  • 6+ months of hands-on experience with Elliptic Curve Cryptography (ECC).
  • Strong understanding of distributed architecture, performance optimization, and systems design.

Ideal Candidate:
  • Deep interest in blockchain protocol development.
  • Experience building low-level distributed systems.
  • Strong understanding of applied cryptography and privacy-preserving technologies.
  • Ability to translate mathematical concepts into production-grade software.
  • Comfortable operating in highly complex, research-driven engineering environments.

Preferred Experience:
  • Cosmos SDK
  • CometBFT / Tendermint
  • Blockchain protocol engineering
  • MPC (Multi-Party Computation)
  • Zero-Knowledge Proofs (ZKP)
  • Cryptographic protocol implementation
  • Financial services, digital assets, or fintech platforms
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