Web3 JavaScript Jobs

As a Software Engineer II, you will join our London-based engineering team, contributing to the design, development, and delivery of Java, Python and TypeScript-based blockchain applications. 

Working alongside experienced engineers with decades of Markets expertise, you'll build production-grade blockchain services, learn cutting-edge DLT technologies, and help transform the financial ecosystem from the inside. This role offers the opportunity to grow your skills in blockchain and distributed systems while working on high-impact projects with direct visibility to business leaders across the industry's leading markets business. Markets Digital Assets focuses on designing and building production-grade solutions leveraging Blockchain and Distributed Ledger Technologies (DLT) to transform JPMorgan's CIB Markets business. We partner closely with Front Office, Product, Operations, and core platform teams to deliver secure, scalable, and compliant digital asset capabilities across our private blockchain network, Kinexys Digital Assets, and public blockchains.

Job Responsibilities

• Develop scalable, secure services using Java Spring Boot, TypeScript/NestJS, ReactJS, and Python
• Contribute to end-to-end delivery: implementation, testing, CI/CD, deployment, and production support
• Write clean, maintainable code and participate in code reviews to uphold engineering standards for quality, observability, and performance
• Collaborate with Front Office, Product, Operations, and platform teams to build and deliver transformative DLT use cases
• Learn and apply blockchain technologies in a full-stack DApps build environment across private and public blockchains
• Work with enterprise development toolchains including Git, Jenkins, and CI/CD pipelines
• Engage with senior engineers and architects to understand distributed systems design and best practices
• Participate in team knowledge-sharing, hackathons, and experimentation with emerging technologies
• Contribute to the team's technical output and help advocate for DLT within the firm

Required qualifications, capabilities and skills

• Hands-on software engineering experience with Java Spring Boot/Python or similar modern backend frameworks
• Understanding of software development fundamentals: data structures, algorithms, object-oriented design
• Experience with version control (Git) and working in collaborative development environments
• Eagerness to learn distributed systems, blockchain technologies, and cloud-native architectures
• Strong problem-solving skills and ability to work effectively in a team
• Excellent communication and collaboration skills; comfort working with diverse stakeholder groups
• Familiarity with CI/CD pipelines, automated testing, and DevOps practices
• Interest in or exposure to blockchain and Distributed Ledger Technologies (DLT)

Preferred qualifications, capabilities and skills

• Familiarity with TypeScript, JavaScript, or front-end development (ReactJS or similar frameworks)
• Experience building on public or permissioned blockchain platforms (e.g., Solana, Ethereum/EVM, Hyperledger, Polkadot, Cosmos, Avalanche, Canton)
• Understanding of cryptographic protocols, smart contracts, or key management
• Experience with AWS services and cloud-native architectures
• Interest in front office or trade-processing environments within financial services

Listed in: Cryptocurrency Jobs, Web3 Web3 Jobs, Developer Crypto Jobs, Engineering Web3 Jobs, TypeScript Web3 Jobs, Python Crypto Jobs, Solana Crypto Jobs, Senior Web3 Jobs, Operations Crypto Jobs, JavaScript Web3 Jobs, EVM Web3 Jobs, Avalanche Crypto Jobs, Devops Web3 Jobs, Cosmos Web3 Jobs, Polkadot Web3 Jobs, Frontend Web3 Jobs, Full Stack Web3 Jobs, Java Web3 Jobs, Data Web3 Jobs, Ethereum Crypto Jobs, Full Time Crypto Jobs.