Uphold · 3 days ago
Senior Backend Blockchain Engineer
New York, NY
Full-time
Hybrid
Senior Level
5+ years expUphold is a Web3 financial platform founded in 2013 that facilitates transactions involving digital assets across various blockchain networks. They are seeking a Senior Backend Blockchain Engineer to build and maintain internal systems for blockchain operations, ensuring scalability, reliability, and security while collaborating with cross-functional teams.
BitcoinBlockchainCryptocurrencyDebit CardsFinancial ServicesFinTechTrading Platform
Responsibilities
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
Qualification
Required
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
Preferred
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.
Company
Uphold
Uphold’s technology enables individuals and businesses to invest, exchange, spend and transfer currencies, commodities, equities, and more.
201-500 employees
H1B Sponsorship
Uphold has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2023 (1)
Funding
Current Stage
Growth StageTotal Funding
$74.9MKey Investors
Hard YakaVenovate
2019-01-01Series C· $50.6M
2017-01-01Seed· $2.6M
2014-12-09Series B· $16.7M
Leadership Team
J.P. Thieriot
CEO
Robin O'Connell
CEO, Enterprise at Uphold, Inc.
Recent News
2025-11-11
2025-10-31
2025-10-31
Company data provided by crunchbase