Fullstack Engineer, Spark
Lightspark is building open payments for the Internet—always-on payment solutions powered by Bitcoin, the only open, neutral network for moving value. With enterprise tools like Connect, UMA, and Spark, businesses can send and receive money instantly, securely, and at a fraction of the cost, anytime, anywhere. Lightspark is headquartered in Los Angeles, California, but serves the world.
Spark ( spark.money ) is building the future of scalable Bitcoin payments. We launched a Bitcoin-native Layer 2 for payments that delivers the fastest, simplest, and cheapest rails in crypto while enabling native, scalable, self-custodial assets like BTC and stablecoins. We are looking for a fullstack engineer to join our Spark SDK team. You’ll have the opportunity to work across multiple languages and platforms, creating SDKs for our global partners that will power the next generation of payment applications. We’re looking for engineers who thrive in high-intensity environments, can adapt quickly, are excited to build on cutting-edge Bitcoin infrastructure, and have fun along the way.
WHAT YOU’LL BE DOING:
Design, build, and maintain SDKs used by our partners to integrate with Spark’s backend services
Work across multiple languages and platforms, primarily JavaScript/TypeScript now, with new SDKs in Kotlin, Go, and others as we expand
Build core functionality and developer tools that will be used by high-volume enterprise customers
Collaborate with other engineers, product managers, and partner teams to deliver reliable, high-quality software
Ensure SDKs are well-tested, well-documented, and easy for developers to adopt
Contribute to the architecture and design of new features, ensuring scalability and performance
Adapt quickly to new technologies, languages, and requirements as the product evolves
Maintain a high bar for engineering excellence in a fast-paced, collaborative environment
WHAT WE’RE LOOKING FOR:
3+ years of fullstack engineering experience
Strong experience with JavaScript/TypeScript
Willingness and ability to work across multiple languages (e.g., Kotlin, Go)
Experience building SDKs, APIs, or developer tools is a plus
Experience with React Native and/or mobile development is a plus
Crypto, fintech, or side project experience is a plus (Bitcoin/Lightning background not required—ability to ramp quickly is key)
Proven ability to work independently and deliver high-quality results under tight timelinesAdaptability and resourcefulness in solving problems across unfamiliar tech stacks
Strong collaboration skills and a proactive approach to driving initiatives forward
Bachelor's degree in Computer Science, or equivalent is a plus but not required. We appreciate and acknowledge that some of the best talent comes from non-traditional backgrounds
Living in, or willing to relocate, to Los Angeles, CA, we are an in-office company located in Culver City
Lightspark is on a mission to build an open payment protocol for the Internet at scale and therefore we’re committed to creating a more inclusive and diverse workplace to reflect the customers we serve. We welcome interest from individuals of all backgrounds and levels of experience who share our mission. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other applicable legally protected characteristics.
We will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of the State of California Fair Chance Initiative for Hiring.
Recommended Jobs
Safety Director
Brady West LA and Elljay Acoustics is seeking a shared S afety D irector. The Safety Director is responsible for developing, implementing , and managing health and safety policies and procedu…
Class A CDL Horse Transportation Driver
Company : Bob Hubbard Horse Transportation Location: Southern California. Salary: Up to $85,000+ per year. Benefits: Health, dental, vision, supplemental insurance, 401k with matc…
Production Manager M-F
Assumes responsibility for the development and implementation of effective production Department planning, policies, and procedures. • Assists Senior Management in developing short and long term go…
Logistics Manager - Dangerous Goods & Classified Materials
ABOUT THE TEAM The Deployments Team manages the coordination and execution of fielding Anduril’s hardware and software products worldwide. Working across Product, Engineering, Growth, Business D…
Sales Associate/Customer Service
Job Description Job Description Hi We're Dalix, a California-based apparel & accessories brand designing looks to make the whole world stop and smile. We're here to help champion your inner you w…
Senior Test & Validation Engineer
Description Position at EVgo About EVgo: EVgo (Nasdaq: EVGO) is one of the nation’s largest public fast charging networks for electric vehicles. Our mission is to expedite the mas…
Data Analyst Intern, application via RippleMatch
This role is with RippleMatch's partner companies. RippleMatch partners with hundreds of companies looking to hire top talent. About RippleMatch RippleMatch is your AI-powered job matchmaker. O…
Explore Innovation in the Heart of Silicon Valley!
Registered Nurse - Cardiac Catheterization Lab - Travel - (Cath Lab RN) Are you feeling unfulfilled in your current nursing role? Consider a rewarding opportunity as a Cardiac Catheterization Lab RN …
Principal Enterprise Security Engineer
Company Description Our Mission At Palo Alto Networks® everything starts and ends with our mission: Being the cybersecurity partner of choice, protecting our digital way of life. Our vi…
Full Time Radiology Job CA
Breast Imaging/GeneralRadiologist position in California close to Fresno Job ID# Job details: ~ BC in Diagnostic Radiology& Fellowship trained or MQSA in Mammography Radiology ~ Joining an i…