Job Details

Senior Software Engineer - Hardware Developer Experience

  2025-09-12     Square     San Francisco,CA  
Description:

Overview

Senior Software Engineer - Hardware Developer Experience (HDX) is a growing internal team that serves developers working with and testing hardware devices. We develop internal software products, firmware tools, test software infrastructure, and developer infrastructure to serve our internal customer teams, including the Android platform teams, firmware teams, QA teams, and app development teams.

You Will
  • Develop and maintain software test platforms for hardware-in-the-loop testing, ensuring high reliability and performance.
  • Oversee the entirety of your features, including component design, implementation, automated testing, rollout, documentation, and maintenance.
  • Provide technical support and triage issues related to all tools Hardware DX owns.
  • Occasionally contribute to and review local and cloud developer environments.
  • Occasionally contribute to and review internal-facing web applications.
  • Give technical direction to projects.
  • Hold yourself and your teammates accountable to high engineering standards that enable Square to safely process billions of dollars in payments and protect sensitive customer data.
  • Work closely with other engineers, technicians, and product managers to develop excellent product experiences.
You Have
  • 8+ years of relevant software development experience (or additional academic experience).
  • Proficiency in Python, as it will be the primary language used.
  • Strong computer science fundamentals including Linux/Unix systems, networking protocols, data structures, algorithms, and hardware-software interfaces that enable you to debug complex issues across software and hardware boundaries.
  • The ability and passion to discover and drive projects that increase developer velocity.
  • Strong ability to collaborate within the team and with adjacent teams, including experience with version control, release management, and coordinating dependency updates across multiple repositories.
  • A passion for building and shipping internal tools and products and working directly with internal customers to rapidly improve their development experience.
Even Better
  • Experience with Android Open Source Project (AOSP) development and communication protocols.
  • Experience with shipping software for Linux and MacOS (arm, x86).
  • Experience with Kotlin for scripting and testing tools.
  • Familiarity with CI/CD platforms such as Buildkite and Jenkins.
  • Experience with cloud technologies like Terraform, Docker, and AWS (EC2).
Equal Opportunity and Hiring Practices

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. We are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. Applicants should share any needed accommodations with their recruiter, who will handle requests as confidentially as possible.

Other Information

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. For questions about hiring practices or data usage, please contact ...@block.xyz.

Block takes a market-based approach to pay, and pay may vary depending on location. US salaries are categorized by zone designations, with starting pay determined based on skills, experience, location, and market conditions. Zone ranges include:

  • 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

We encourage applicants to review the posted date on the job page. There is no fixed application deadline for this role.

Location notes and further details may vary by region. If you have questions about location or compensation, please speak with a recruiter.

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