Designs and implements core features of the Taproot Assets Protocol on Bitcoin, contributes to Go-based cryptocurrency daemons, and collaborates on protocol evolution. Requires strong Bitcoin protocol knowledge, distributed systems expertise, and Go programming experience.

Build and own core backend systems for a healthcare platform using a Python-first stack. The role requires at least five years of experience building complex web applications and strong product ownership, communication, and execution skills.

Leads technical direction and architecture for backend systems supporting music economy platform with web3 features like NFTs and blockchain data pipelines. Requires 6+ years experience, North American timezones, and individual contributions to scalable infrastructure.

Builds and scales backend APIs handling millions of users, focusing on TypeScript services, async workflows, database optimization, and AWS infrastructure for AI platform reliability.

Designs and implements core Lightning Network protocols and algorithms for Bitcoin's layer-2 scaling. Contributes to Go-based peer-to-peer cryptocurrency daemons, conducts research, and engages with open source community. Requires strong systems engineering with distributed systems and crypto expertise.

Build and optimize backend integrations with external APIs and services, including crawler and reverse-engineering work. The role requires strong Python and networking knowledge plus 5+ years of backend development experience.

Build scalable backend systems, integrate with 3rd party services like payments and CRMs, and optimize GraphQL performance for a moving industry platform. Requires 2-5 years experience with Python/Flask, GraphQL, PostgreSQL, and AWS.

Builds and ships major backend features in Clojure and JavaScript/TypeScript, tackling complex issues. Requires Clojure experience or eagerness to learn, proven track record with complex products, and strong CS fundamentals.