blockchain developer Jobs in california

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Software Developer - Architect, Blockchain, FinTech Data Platform

Oracle Corporation

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Redwood City, California, USA

Full-time

Job Description Architect, FinTech Data Platform We are looking for senior architects to help define and deliver our next-generation FinTech Data Platform. This is a collection of cloud and on-prem software services to enable central banks and financial institutions to build modern distributed financial transactional systems based on tokenization. Some of the applications of this platform include central bank digital currency, Deposit Tokens for peer-to-peer digital asset and information trans
Posted 60+ days ago | Updated 7 hours ago

Blockchain Interoperability Engineer

Cogent IBS, Inc

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Remote

Full-time

Location: USA (Remote with occasional travel to MI & VA) Full-Time | Salaried with Cogent ( / / H1B / TN Visa transfer ) Role Overview: Design and maintain secure, performant cross-chain communication protocols to enable seamless token transfers, staking, and verification across blockchain ecosystems. Key Responsibilities: Develop and implement bridge logic and cross-chain messaging layers (e.g., IBC, Layer Zero).Ensure reliable token movement, validator coordination, and proof validation acr
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Posted 4 days ago | Updated 4 days ago

Front-End Blockchain UX Engineer

Cogent IBS, Inc

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Remote

Full-time

Requirement: 46 years of front-end development (React, Vue, or similar), with 2+ years building Web3/blockchain interfaces (Mandatory). Strong grasp of wallet flows, transaction signing, and decentralized app architecture. Experience with blockchain APIs, real-time data streams, and UX for trust and security.
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Posted 8 days ago | Updated 4 days ago

Blockchain Security Architect

Kforce Technology Staffing

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Remote or Orlando, Florida, USA

Contract

RESPONSIBILITIES: A client with Kforce is seeking a Blockchain Security Architect (Senior Blockchain Developer- Security focus) to join their team in Orlando, FL. The Manager is looking for someone who is hands-on, as this position will be responsible for designing the CRYO Wall runtime environment and embedding a prevention-first security model into both blockchain infrastructure and wallet layers. This role requires deep expertise in blockchain technologies, security architecture, and runtime
Posted 1 day ago | Updated moments ago

AI/ML Runtime Analyst

Cogent IBS, Inc

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Remote

Full-time

Location: USA (Remote with occasional travel to MI & VA) Full-Time | Salaried with Cogent Job Summary: We are seeking a skilled AI/ML Runtime Analyst to develop and implement machine learning models that detect fraud, bugs, and exploits within the runtime behavior of smart contracts and blockchain transactions. The ideal candidate will combine expertise in AI/ML with a strong understanding of blockchain technology to enhance security and trust in decentralized systems. This role specifically fo
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Posted 8 days ago | Updated 1 day ago

Blockchain Security Architect

Cogent IBS, Inc

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Remote

Full-time

Required: 7+ years of experience in security architecture or cybersecurity roles, including 3 5 years in blockchain security, runtime environment design, or related domains. Proven experience designing secure blockchain runtime environments or similar distributed systems. Strong understanding of blockchain protocols, cryptographic primitives, smart contracts, and wallet security models. Expertise in security architecture frameworks, threat modeling, and prevention-first security strategies.
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Posted 8 days ago | Updated 4 days ago

Back-End Blockchain UX Engineer

Cogent IBS, Inc

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Remote

Full-time

Location: USA (Remote with occasional travel to MI & VA) Full-Time | Salaried with Cogent Required Qualifications 3+ years of experience in backend development, with at least 1 year focused on blockchain or crypto wallet projects (Mandatory) Proficiency in backend programming languages such as Python, Node.js, Go, or Rust Experience with blockchain technologies, including integrating with public blockchains, smart contracts, and Web3 libraries (Mandatory) Solid understanding of RESTful API des
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Posted 4 days ago | Updated 3 days ago

Lead Wallet Engineer (Blockchain) - Remote

Kforce Technology Staffing

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Remote or Orlando, Florida, USA

Contract

RESPONSIBILITIES: A client with Kforce is seeking a Lead Wallet Engineer (Senior Blockchain Engineer) to join their team. This is a remote position, and the resource must be able to work EST hours. Summary: The Lead Wallet Engineer should have 7-10 years of software engineering experience, including 2-4 years in blockchain wallet development, to lead the architecture and implementation of next-generation wallet solutions. This role focuses on integrating wallet logic with runtime security valid
Posted 1 day ago | Updated moments ago

Blockchain Forensics Analyst (Security Analyst)

Cogent IBS, Inc

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Remote

Full-time

Job Description: We are seeking a highly skilled and detail-oriented Blockchain Forensics Analyst/Security Analyst who can join our security and compliance team. In this critical role, you will lead post-execution forensic investigations on blockchain transactions and smart contracts to detect anomalies, fraudulent behavior, and trust violations. Your expertise will drive the integrity and trustworthiness of our decentralized ecosystem by uncovering threats, supporting incident response, and st
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Posted 7 days ago | Updated 13 hours ago

Front-End Blockchain UX Engineer - Remote

Kforce Technology Staffing

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Remote or Orlando, Florida, USA

Contract

RESPONSIBILITIES: A client with Kforce is seeking a Front-End Blockchain UX Engineer to join their team remotely. They are seeking someone with 6-8 years of experience in front-end development, including relevant experience building Web3 or blockchain-enabled interfaces. This role focuses on designing wallet and dashboard experiences that embed trust, security, and transparency into every interaction. Key Responsibilities: * Build wallet/dashboard UI with embedded trust and verification workflo
Posted 1 day ago | Updated moments ago

AI/ML Runtime Analyst (Backend Developer) - Remote

Kforce Technology Staffing

•

Remote or Orlando, Florida, USA

Contract

RESPONSIBILITIES: A client with Kforce is seeking an AI/ML Runtime Analyst (Backend Developer) to join their team. This is a remote position, and the resource must be able to work EST hours. This client is looking for someone with strong backend development skills to develop and operationalize machine learning models that detect fraud, bugs, and exploits in the runtime behavior of smart contracts and blockchain transactions. The ideal candidate will bring experience in anomaly detection and secu
Posted 1 day ago | Updated moments ago

Senior Blockchain Security Engineer

Coinbase

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Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 39 days ago | Updated 7 hours ago

Blockchain Security Engineer

Coinbase

•

Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 36 days ago | Updated 7 hours ago

Senior Blockchain Security Engineer

Coinbase

•

Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 60+ days ago | Updated 11 hours ago

Senior Blockchain Security Engineer

Coinbase

•

Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 60+ days ago | Updated 11 hours ago

Senior Software Engineer (Platform - Blockchain Platform Nodes)

Coinbase

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Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 39 days ago | Updated 7 hours ago

Senior Blockchain Security Engineer, Offensive Security

Coinbase

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Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 39 days ago | Updated 7 hours ago

Senior Software Engineer, Research

Circles Inc.

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Remote or San Francisco, California, USA

Full-time

Circle is a financial technology company at the epicenter of the emerging internet of money, where value can finally travel like other digital data - globally, nearly instantly and less expensively than legacy settlement systems. This ground-breaking new internet layer opens up previously unimaginable possibilities for payments, commerce and markets that can help raise global economic prosperity and enhance inclusion. Our infrastructure - including USDC, a blockchain-based dollar - helps busines
Posted 60+ days ago | Updated 7 hours ago

Software Engineer, Backend - (Blockchain Platform - Nodes)

Coinbase

•

Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 39 days ago | Updated 7 hours ago

Software Engineer, Backend - (Blockchain Platform - Wallet)

Coinbase

•

Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 39 days ago | Updated 7 hours ago