Fullstack Engineer, Spark at Lightspark

Los Angeles, California, United States

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$170,000 – $200,000Compensation

Mid-level (3 to 4 years)Experience Level

Full TimeJob Type

UnknownVisa

Fintech, Blockchain, PaymentsIndustries

Requirements

3+ years of fullstack engineering experience
Strong experience with JavaScript/TypeScript
Willingness and ability to work across multiple languages (e.g., Kotlin, Go)
Proven ability to work independently and deliver high-quality results under tight timelines
Adaptability and resourcefulness in solving problems across unfamiliar tech stacks
Strong collaboration skills and a proactive approach to driving initiatives forward
Living in, or willing to relocate, to Los Angeles, CA (in-office in Culver City)

Responsibilities

Design, build, and maintain SDKs used by 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

Skills

Key technologies and capabilities for this role

JavaScriptTypeScriptKotlinGoSDK DevelopmentFullstack EngineeringAPI IntegrationTestingDocumentationBitcoin

Questions & Answers

Common questions about this position

What is the salary range for the Fullstack Engineer position at Spark?

The salary range is $170K - $200K.

Is this a remote position or does it require onsite work?

This is an onsite position requiring you to live in or relocate to Los Angeles, CA, as Lightspark is an in-office company located in Culver City.

What skills are required for this Fullstack Engineer role?

The role requires 3+ years of fullstack engineering experience, strong experience with JavaScript/TypeScript, and willingness to work across multiple languages like Kotlin and Go.

What is the work environment like at Lightspark's Spark team?

The team operates in a high-intensity, fast-paced, collaborative environment where engineers thrive by adapting quickly, maintaining engineering excellence, and having fun while building on cutting-edge Bitcoin infrastructure.

What makes a strong candidate for this Fullstack Engineer position?

Strong candidates have 3+ years of fullstack experience, proficiency in JavaScript/TypeScript, ability to work across languages, proven independence under tight timelines, adaptability to new tech stacks, and strong collaboration skills; pluses include SDK/API experience, React Native, and crypto/fintech background.

Lightspark

Facilitates Bitcoin transactions via API and SDKs

About Lightspark

Lightspark focuses on facilitating Bitcoin transactions for businesses by providing an API and Software Development Kits (SDKs) that integrate with the Lightning Network. This technology allows for faster and cheaper cross-border payments by identifying efficient routes for transactions. Unlike competitors, Lightspark's service-based model enables businesses to leverage Bitcoin without needing deep technical expertise. The goal is to streamline payment processes, making them more efficient and cost-effective.

Los Angeles, CaliforniaHeadquarters

2022Year Founded

$1.3MTotal Funding

SEEDCompany Stage

Fintech, Crypto & Web3Industries

51-200Employees

Risks

Increased competition from fintech companies like Strike and OpenNode.

Regulatory scrutiny in the US and EU could impact cryptocurrency transactions.

Technological vulnerabilities in the Lightning Network may affect Lightspark's reputation.

Differentiation

Lightspark offers a robust API and SDKs for Bitcoin integration on the Lightning Network.

The company provides a dashboard for tracking and managing Bitcoin transactions efficiently.

Lightspark's Universal Money Address (UMA) enhances global payment solutions for businesses.

Upsides

Partnerships with Bitso and Foxbit expand Lightspark's reach in Latin America.

Introduction of Spark and UMA boosts Lightspark's product offerings and market appeal.

Strategic expansion into Africa with Yellow Card highlights growth in emerging markets.

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