Staff Software Engineer

The Role

We're looking for a Staff Software Engineer (iOS/Swift) to lead our mobile apps across iOS. You'll set technical direction, design and build reusable component libraries, and raise the bar on quality, performance, and accessibility. You'll also champion AI-assisted engineering—both to accelerate development (e.g., code generation, testing, refactors, documentation) and to integrate AI-powered visualizations that help clinicians and patients make sense of complex brain-health data. This role is highly cross-functional and pivotal to our mission.

 Location:  Providencia, Guadalajara, Mexico

 Language: Bilingual (English & Spanish)

 Work Authorization: Must be legally authorized to work and currently residing in Mexico.

Full-Time | U.S. Eastern Time.

What You'll Do

• Own the mobile architecture across iOS (Swift/SwiftUI/UIKit) and React Native—modularity, performance, security, and observability.
• Create and maintain reusable mobile component libraries (design-system alignment, theming, accessibility, localization, dark mode).
• Ship AI-enabled features that surface insights visually (charts/plots/progressions) and responsibly—privacy-by-design, auditable outputs.
• Raise engineering standards: testing (unit/snapshot/e2e), CI/CD for mobile, OTA strategies, release automation, crash analytics, and telemetry.
• Mentor and unblock engineers; drive clear design docs, ADRs, and code reviews; partner deeply with Product, Design, Data Science/Medical, and Security.
• Lead cross-team initiatives (performance, reliability, offline/edge patterns, network/data sync, app startup time, bundle size reduction).
• Champion AI-assisted workflows to boost delivery speed and quality (intentional prompts, verification practices, secure usage guidelines).
• Collaborate with Data Science/Medical to integrate model outputs safely and clearly into the UI, including uncertainty and context visualization.

Must Have's

• 10+ years of software engineering experience with significant time in mobile; 5+ years building and shipping iOS apps in Swift; 3+ years with React Native at scale.
• Expert in Swift/SwiftUI (and/or UIKit), Xcode tooling, Instruments, and Apple platform fundamentals (background tasks, permissions, Keychain, App Store Connect, TestFlight).
• Strong React Native fundamentals (bridge/native modules, performance profiling, Hermes, Metro/bundling, OTA, navigation).
• Proven track record designing reusable component systems (design tokens, accessibility, theming, API ergonomics, documentation).
• Hands-on experience using AI to accelerate coding (scaffold code/tests, refactors, docs) and productizing AI in-app (safe prompts, evaluation, guardrails).
• Depth in mobile data flows (REST/gRPC, GraphQL, streaming), offline-first sync, error handling, and app state management.
• Quality mindset: unit/UI/e2e testing (XCTest, snapshot testing, Detox), monitoring, crash analytics, metrics/SLOs.
• Security and privacy literacy suitable for healthcare contexts (e.g., PII/PHI handling patterns, least-privilege, secure storage).
• Clear technical communication: design docs, ADRs, tradeoff analysis, and stakeholder alignments.

Nice To Have's

• Experience in digital health or clinical workflows; familiarity with regulated environments.
• Data visualization skills (e.g., Charts on iOS, D3/Reanimated/Skia in RN) and communicating uncertainty.
• Native Android familiarity (Kotlin) or cross-platform build/release expertise.
• Prior ownership of design systems or component libraries used across multiple apps/teams.
• Experience with on-device ML or efficient edge inference patterns.
• Experience in architecting B2B and consumer-facing applications.

Equal Opportunity Statement

We are an equal opportunity employer. All qualified candidates will receive consideration for employment without regard to race, religion, color, national origin, sexual orientation, gender identity or expression, age, genetic information, disability, or any other characteristic protected by law. We value diversity and strive to create an environment where everyone's voice is heard.

At Meztal, we prioritize innovation, collaboration, and personal growth. You'll have the opportunity to work on meaningful projects, be part of a supportive team, and enjoy a culture that values work-life balance and professional development.

• Christmas Bonus: 30 days, to be paid in December.

• Major Medical Expense Insurance: Coverage up to $20,000,000.00 MXN.

• Minor Medical Insurance: VRIM membership with special discounts on doctor's appointments and accident reimbursements.
• Dental Insurance: Always smile with confidence
• Life Insurance: (Death and MXN Disability)
• Vacation Days: 12 vacation days in accordance with Federal Labor Law, with prior approval from your manager. + Floating Holidays: 3 floating holidays in addition to the 7 official holidays in Mexico.
• Cell Phone Reimbursement & Transportation Subsidy.
• Hybrid Scheme: Enjoy the best of both worlds, remote and in-office work.
• Multicultural Exposure: Work with operations within Mexico and the United States.
• MezTal Internal Events: Strike a healthy balance between your professional and personal goals.
• Exclusive Discounts: Benefits with different companies for being part of MezTal.
• Academic Agreements: Access to national universities and language schools.