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Staff iOS Software Engineer, Bitcoin

Block· 10102 Engineering - Cash App
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Hybrid (Bay Area, CA)$263.6k - $395.4kfull-timePosted 2w ago

About the role

Senior iOS engineer responsible for technical direction, delivery, and ownership of a critical iOS product area related to bitcoin, stablecoins, and non-custodial wallets across Cash App, Square, and Bitkey.

Responsibilities

  • Build products in iOS related to bitcoin, stablecoin and non custodial wallets.
  • Work across interfaces in Cash App, Square and Bitkey.
  • Own complex features end to end, including client architecture, service integration, testing, rollout, and post-launch improvements.
  • Work with product and design to shape customer journeys, prototype new interactions, and turn open questions into delivery plans.
  • Build prototypes, reference implementations, and critical paths that prove a direction before broader adoption.
  • Contribute bitcoin and stablecoin technology to open source when it creates value for the broader community.
  • Influence the technical direction within the product area, making explicit tradeoffs and sequencing dependencies with adjacent teams.
  • Improve architecture and shared components where they make product development faster, safer, or more consistent.
  • Build automated testing, observability, and safe rollout practices into delivery, with security, privacy, and compliance safeguards appropriate to the risks.
  • Integrate AI-assisted development tools into daily workflows to drive leverage across bitcoin engineering.
  • Evaluate emerging tools and practices, building durable, AI-powered capabilities where they add clear value.
  • Verify AI-assisted outputs and ensure high standards for software quality, security, and reliability.
  • Contribute to codebases beyond your iOS specialty.
  • Operate beyond your immediate team to identify and address cross-cutting technical problems.
  • Lead architecture and design reviews across team boundaries.
  • Surface systemic risks before they become customer, seller, or engineering problems.
  • Mentor engineers through design discussions, code reviews, and structured guidance that helps them take on greater ownership.
  • Help set technical standards that improve the quality and velocity of iOS development over time.
  • Partner with engineers, product managers, designers, and engineering leaders to align technical investments with product needs.
  • Work with Android, web, and backend engineers to improve shared product foundations and cross-platform experiences.
  • Represent bitcoin iOS in cross-team and company-wide technical discussions.
  • Communicate complex technical decisions clearly to technical and nontechnical audiences.

Qualifications

  • 12+ years of professional software engineering experience, including 4+ years building native iOS products.
  • Deep experience building, shipping, and maintaining native iOS products using Swift and Apple frameworks.
  • Experience creating foundational systems, shared frameworks and tooling used widely on your team.
  • A record of leading strategic initiatives with broad adoption and durable impact.
  • Strong systems thinking, technical communication, mentoring, and organizational influence.

Skills

Required:iOS development (Swift)Architecture & system designCode review & mentoring
Nice to have:AI-assisted development

Benefits

  • Remote work
  • medical insurance
  • flexible time off
  • retirement savings plans
  • modern family planning
Last updated Oct 7, 2026. Interested? Apply on the company site.
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About Block

Block builds technology to increase access to the global economy.

Made up of Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block, Inc. builds technology to increase access to the global economy.

technologyfinancial servicesdigital paymentsmusic streaming
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