Job Description

About Uphold: The Web3 economy will redefine how financial value is held and transacted - with much activity shifting towards blockchain networks and digital assets. Founded in 2013, Uphold is a Web3 financial platform that supports almost 300 digital assets and acts as Regulated Gateway to the Web3 economy. Featuring integrations with 26 blockchain networks and a robust trading engine connected to 30 underlying venues, the platform allows users to trade 'Anything-to-Anything' while enjoying keen pricing and deep liquidity. Uphold has completed more than 120 million transactions worth $40 billion from 10 million customers in over 150 countries. Both people and companies need to access this exciting Web3 world, but it can be technically demanding and time-consuming. Uphold strips away the complexity and lack of transparency to open up Web3 finance for everyone. To learn more about Uphold, please visit The opportunity: Uphold is seeking a Senior Backend Blockchain Engineer to join our blockchain engineering team in New York, US. This role will focus on building and maintaining the internal systems that power our blockchain operations, working across multiple blockchains and distributed ledgers to ensure scalability, reliability and security. This is a hybrid position requiring office presence 3x week. What you'll be doing primarily:

• Design, build, and maintain backend services for operations across multiple blockchains and distributed ledgers using network specific SDKs.
• Implement clean, well-tested TypeScript code; write unit and integration tests (using Jest) to ensure quality, reliability, and security.
• Participate in architectural discussions; contribute to technical design and continuous improvement of systems and processes.
• Mentor and support engineers through code reviews and pair programming; promote best practices and code quality.
• Create and maintain technical documentation for services, tools, and operational runbooks.
• Collaborate with Product, DevOps, and Security to plan, scope, and deliver features that meet performance and reliability goals.
• Monitor, troubleshoot, and resolve production issues; participate in on-call rotations as needed.

Required qualifications:

• Bachelor's degree in Computer Science, Engineering, or related field, or equivalent experience.
• 5+ years of professional software engineering experience.
• Proficiency with TypeScript (or JavaScript, if you also have other experience of higher level typed languages) and significant experience with blockchain SDKs (e.g., ethers.js, web3.js, bitcoinjs-lib).
• Practical experience interacting with smart contracts (note: authoring contracts is typically not part of this role).
• Strong experience writing unit/integration tests (preferably with Jest).
• Confidence working in large, complex codebases with a strong sense of ownership.
• Effective communication skills; collaborative, positive team player.
• Strong problem-solving skills, organizational skills, and ability to work under pressure.

Bonus if you have:

• Experience with Go (Golang).
• Experience with relational databases (preferably PostgreSQL) and/or non-relational databases (e.g., Redis).
• Experience designing/consuming web APIs (e.g., REST).
• Experience with CI/CD and automated testing pipelines.
• Experience with code management using git and GitHub (or similar).

Benefits:

• Annual bonus program based on individual, team and company performance.
• Home office stipend to support the setup of a productive home office.
• Generous PTO, healthcare coverage, and employee assistance programs.
• Interesting and fun events and celebrations.
• Foodie culture and well-stocked office kitchen.

Join our team and embark on a fulfilling career where you'll have the opportunity to grow, innovate, and contribute to something meaningful. Come and be a part of our talented team! If this job isn't exactly what you are looking for, visit our careers page to check out all our exciting opportunities. EEOC Employer We're proud to be an Equal Opportunity Employer and we celebrate our employees' differences, including race, color, religion, gender identity, national origin, age, military service eligibility, veteran status, sexual orientation, marital status, disability, and any other protected classes. Difference makes us stronger and better - together.

Job Tags

Work at office, Home office, Shift work,

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