Senior Software Engineer, Fullstack - Proto Fleet

Proto is accelerating the world's transition to an open economy with products that increase access and independence for everyone. We're building Bitkey, a simple and safe self-custody bitcoin wallet that will put customers in control, as well as hardware and software that will help decentralize bitcoin mining and enable new and innovative use cases for bitcoin mining. We're developing these products in the open - you can read more about them at bitkey.build and mining.build . Within Proto, our Bitcoin Products team delivers the product and go-to-market strategy, software, firmware, and custom silicon needed to make Bitkey and our ambitious mining initiatives a reality. Come build the future of money with us!

The Role

Proto's vision is to contribute to the health of the bitcoin network by decentralizing both the supply of mining hardware and the distribution of hashrate. As a Senior Software Engineer, you will be a technical leader in realizing this vision through architecting and leading the development of our core mining infrastructure platform.

Our competitive advantage lies in our proven track record: we've shipped tens of millions of reliable devices, excel in operations, maintain consistent supply chains, and have built strong customer support capabilities across multiple business lines. We bring unique customer focus and go-to-market capabilities to the mining space, where Block is recognized as a leader in the bitcoin ecosystem.

You Will

• Architect and lead mission-critical, real-time mining infrastructure


• Establish engineering standards and drive technical decisions


• Develop integration frameworks for mining hardware and tools


• Mentor engineers and provide cross-team technical leadership


• Drive technical planning for major platform initiatives


• Lead architecture reviews and technical deep dives


• Shape technical strategy with leadership


• Review external contributions while maintaining quality

You Have

• 8+ years professional software development experience


• Expert knowledge in Go, Rust, Typescript, or equivalent systems languages


• Proven leadership in complex technical initiatives and architecture


• Strong background in API design and real-time system architecture


• Experience building large-scale, mission-critical infrastructure at scale


• Experience designing transactional and analytical databases


• System design skills focused on scalability, reliability, and performance


• Strong technical documentation and community engagement skills


• Understanding of open source security best practices


• Track record of building inclusive technical communities


• Proficiency integrating AI tools into development workflows


• Familiarity with bitcoin mining hardware and protocols

Technologies We Use and Teach

• Primary: Go, Rust, Typescript


• Infrastructure: gRPC, Protocol Buffers, Docker


• Data Streaming & Messaging: Kafka, MQTT


• Cloud & Deployment: AWS, Kubernetes


• Databases: MySQL, InfluxDB, TimescaleDB


• Monitoring: Prometheus, Grafana

We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.

We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page .

While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.