Senior Native iOS Engineer

Senior Native iOS Engineer Country: IT STARTS HERE Santander ( www.santander.com ) is evolving from a global, high-impact brand into a technology-driven organization , and our people are at the heart of this journey. Together , we are driving a customer-centric transformation that values bold thinking, innovation , and the courage to challenge what’s possible. This is more than a strategic shift. It’s a chance for driven professionals to grow, learn, and make a real difference . Our mission is to contribute to help more people and businesses prosper . We embrace a strong risk culture and all our professionals at all levels are expected to take a proactive and responsible approach toward risk management. Our Chief Data & Artificial Intelligence Officer (CDAIO) division is building a world-class AI & Data team to make a difference in the lives of over 170 million people worldwide, through one of the largest banks in the world. We are undergoing one of the biggest transformations in our history and technology is at the heart of our strategy. Join our team to play a part in one of the most important technological projects for the financial sector in the world. Our mission is to contribute to helping more people and businesses prosper. We embrace a strong risk culture and all our professionals at all levels are expected to take a proactive and responsible approach toward risk management.  THE DIFFERENCE YOU MAKE CDAIO/ AI TECH is looking for a Senior Native iOS Engineer based in Madrid. We are seeking a  Senior Native iOS Engineer  to build advanced mobile solutions using  Swift 6 ,  SwiftUI , and modern concurrency and reactive programming models ( Combine ,  async/await ). You will deliver concrete products — production apps and  reusable, binary-distributed libraries (XCFrameworks)  — within the Grupo Santander platform ecosystem, applying solid  software architecture  and  CI/CD  practices to ensure quality, maintainability, and scalability. This role works on  product SDKs  (e.g. an AI chatbot SwiftUI component) that sit on top of the shared Santander iOS platform layers, so the ability to read, integrate with, and reason about  platform building blocks  is essential. Main Responsibilities: Design and implement the architecture of iOS features and reusable libraries, applying best practices in design, modularity, and maintainability (layered architecture +  MVVM ). Make advanced use of  Swift 6, including structured concurrency (async/await, actors, Task, @MainActor) and the Combine framework for reactive, state-driven UI. Build modern, accessible user interfaces using SwiftUI (WCAG 2.1 AA). Build, distribute, and maintain reusable libraries/frameworks (XCFramework) for internal and external teams, respecting API/ABI stability and a controlled deprecation policy. Integrate cleanly with the Santander iOS platform layers (foundation / core / features): dependency injection, networking, analytics, routing/deep links, authorization, anti-fraud, etc. Collaborate with product, design, and backend teams to define robust APIs, workflows, and user experiences (REST and streaming). Set up and maintain CI/CD pipelines and quality gates, and participate in code reviews, sharing knowledge with the team. Ensure software quality through automated testing, static analysis, continuous integration, and best practices in semantic versioning. Stay up to date with iOS ecosystem trends and propose relevant technology adoption. WHAT YOU’LL BRING Our people are our greatest strength. Every individual contributes unique perspectives that make us stronger as a team and as an organization. We’re enabling teams to go beyond by valuing who they are and empowering what they bring. The following requirements represent the knowledge, skills, and abilities essential for success in this role. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Professional Experience Design and implement the architecture of iOS features and reusable libraries, applying best practices in design, modularity, and maintainability (layered architecture + MVVM).(Required). Make advanced use of Swift 6, including structured concurrency (async/await, actors, Task, @MainActor) and the Combine framework for reactive, state-driven UI.(Required). Build modern, accessible user interfaces using SwiftUI (WCAG 2.1 AA).(Required). Build, distribute, and maintain reusable libraries/frameworks (XCFramework) for internal and external teams, respecting API/ABI stability and a controlled deprecation policy.(Required). Integrate cleanly with the Santander iOS platform layers (foundation / core / features): dependency injection, networking, analytics, routing/deep links, authorization, anti-fraud, etc.(Required). Collaborate with product, design, and backend teams to define robust APIs, workflows, and user experiences (REST and streaming).(Required). Set up and maintain CI/CD pipelines and quality gates, and participate in code reviews, sharing knowledge with the team.(Required). Ensure software quality through automated testing, static analysis, continuous integration, and best practices in semantic versioning.(Required). Stay up to date with iOS ecosystem trends and propose relevant technology adoption. (Required). Languages Native level in Spanish. (Preferred). English — Technical English — minimum B2, C1 strongly preferred .  All source code, inline documentation, commit messages, pull requests, and cross-team communication are produced  in English . Day-to-day collaboration with product/design/backend happens in English, so professional working proficiency is mandatory, not optional. (Required). Hard Skills Solid knowledge of CI/CD in iOS environments (Fastlane, GitHub Actions and/or Bitrise) and artifact distribution. (Required). Static analysis and quality gates: SwiftLint, SonarQube. (Required). Strong docume