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.
Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.
To find a location's zone designation, please refer to this resource . If a location of interest is not listed, please speak with a recruiter for additional information.
Zone A:
$217,800 - $326,800 USD
Zone B:
$207,000 - $310,400 USD
Zone C:
$196,100 - $294,100 USD
Zone D:
$185,200 - $277,800 USD
Use of AI in Our Hiring Process
We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws.
Contact us at [email protected] with hiring practice or data usage questions.
Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.