Staff iOS Software Engineer, Bitcoin

Block•Bay Area, CA, United States of America, CA

1d•$263,600 - $395,400•Remote

About The Position

The Bitcoin team at Block is seeking an experienced iOS engineer to help build products and platforms that make bitcoin, stablecoins, and non-custodial wallets accessible globally. This role involves working across multiple Block brands (Cash App, Square, Bitkey) to create secure, reliable, and high-quality mobile experiences. The ideal candidate is passionate about building products, can navigate complex problems, and thrives in a fast-paced environment. You will collaborate closely with product, design, and engineering partners to translate intricate financial capabilities into intuitive and dependable customer experiences.

Requirements

12+ years of professional software engineering experience.
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.

Nice To Haves

Experience working in large, modular iOS applications, including existing UIKit or Objective-C codebases.
Experience with build systems, continuous integration and delivery, testing infrastructure, observability, or mobile performance.
Experience supporting customer-facing or seller-facing products in financial services, commerce, or another high-trust environment.
Experience with experimentation infrastructure, feature flags, or large-scale product delivery.
Experience working with bitcoin, stablecoin, and non-custodial technologies.
A record of identifying and leading work that was not already on a team's roadmap.

Responsibilities

Own the technical direction and delivery of a critical area of our iOS product experience with bitcoin and stablecoin.
Prototype new ideas, make architectural decisions, write production code, and lead work through launch and ongoing improvement.
Align product requirements with backend capabilities.
Resolve dependencies with partner teams.
Make tradeoffs across customer experience, delivery speed, security, and reliability.
Tackle complex design and implementation problems while helping other engineers contribute effectively.
Ship valuable products and improve future releases through fewer recurring problems, clearer interfaces, stronger testing, and reusable practices.
Build and evolve the iOS product 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.
Collaborate with product and design to shape customer journeys, prototype new interactions, and develop delivery plans.
Build prototypes, reference implementations, and critical paths to validate technical directions.
Contribute bitcoin and stablecoin technology to open source when it benefits the community.
Influence the technical direction within the product area, managing tradeoffs and dependencies with adjacent teams.
Improve architecture and shared components to accelerate product development, enhance safety, and ensure consistency.
Integrate automated testing, observability, and safe rollout practices, ensuring appropriate security, privacy, and compliance safeguards.
Integrate AI-assisted development tools into daily workflows to enhance leverage within bitcoin engineering.
Evaluate emerging tools and practices, building durable, AI-powered capabilities where they add clear value.
Verify AI-assisted outputs and maintain high standards for software quality, security, and reliability.
Contribute to codebases beyond iOS specialty.
Operate beyond the immediate team to identify and address cross-cutting technical problems.
Lead architecture and design reviews across team boundaries.
Surface systemic risks before they impact customers, sellers, or engineering.
Mentor engineers through design discussions, code reviews, and structured guidance.
Help set technical standards to improve the quality and velocity of iOS development.
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 both technical and nontechnical audiences.