Lightspark

You'll architect the safety of a **high-throughput decentralized payment network** built on the Lightning Network. You'll perform **deep-dive protocol audits**, secure **cloud-native infrastructure**, and manage cryptographic operations like MPC and TSS.

You'll architect Lightspark's core transaction engine, owning the strategy for AI Routing and Grid Switch to maximize transaction success rates and minimize cost. In this matrixed role, you'll drive the horizontal platform layer while leading vertical customer engagements to bring new payment capabilities to market. You'll define the future of **agentic commerce** in a fast-paced **0-to-1** environment.

You'll shape how the world experiences **Spark** (a Bitcoin L2) by designing developer-facing tools, dashboards, and wallet experiences. You'll make **complex L2 infrastructure** feel simple and trustworthy through product design and interactive prototypes. The role spans product, demos, and marketing assets in a tight-knit, fast-moving team.

You'll ship production code across the stack and build APIs for global payments infrastructure. You'll work directly with senior engineers on end-to-end projects using **AI tooling** with an unlimited token budget. This role offers fast learning and real impact on products that move serious volume.