Lead Product Designer, Spark

Lightspark is building the open payment protocol for the Internet making money move like data: instantly, globally, and without friction. With enterprise tools like Grid, Node, 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.

We're building infrastructure that makes Bitcoin and stablecoins as easy to use as the internet. We're backed by a16z crypto, Paradigm, Ribbit Capital, Coatue, and Thrive Capital. Our products power wallets, instant deposits, buy/sell, and global money movement for companies like Tether, Deblock, Breez, Xverse, and Privy.

About Spark

Spark is a Bitcoin L2 that lets you move Bitcoin and stablecoins instantly, at near-zero cost, without bridges or wrappers. It's open source, natively interoperable with Lightning, and already live in production. Wallet SDKs, token issuance, zero-conf deposits. Spark is how the next generation of money apps gets built. Learn more at spark.money

About the team

The design team at Lightspark is four people. We use AI tools (Cursor, Claude, Figma) daily to move from idea to working software fast. We build interactive prototypes as real code, design marketing assets that explain complex infrastructure simply, and collaborate directly with engineering. The team is tight-knit, opinionated about craft, and moves quickly.

What you'll do

This role is primarily focused on Spark. You'll be the designer shaping how the world experiences a new Bitcoin payment layer, through product, demos, and everything in between.

Build the product. Own the design of Spark's developer-facing tools, dashboards, and wallet experiences. Make the complexity of L2 infrastructure, stablecoin settlement, and multi-chain interoperability feel simple and trustworthy.

Ship prototypes and demos. Build functional, high-fidelity prototypes that show partners and prospects what S...