About Flatiron is a global remote software development company with engineers located around the world. We unite experts from diverse backgrounds and experiences in a collaborative culture to deliver exceptional products and services for our clients. As a forward-thinking software engineering company, we provide industry-leading solutions to complex problems in both the US and the UK. Operating in a fast-paced, agile environment, we specialize in software consulting for our clients. We offer a stimulating and rewarding environment for our team members. We value innovation, continuous learning, and professional growth, and we strive to create a workplace where everyone can thrive. Join us at Flatiron and be a part of a team that is shaping the future of software development. Job Summary This is a full-time fully remote working opportunity where you will be working as part of a Scrum team which requires working closely with other software engineers, stakeholders and contributors on the project. Working with respect to the US timezone is a requirement for the position. Attending meetings, being actively involved in the decision making process and collaborating with all of these stakeholders are essential parts of this position. Role Overview We are looking for a Senior iOS Engineer to design, build, and ship high-quality mobile applications, with a strong focus on iOS-first development. This role is ideal for someone who has spent years building production iOS apps, thrives in early-stage or fast-moving environments, and enjoys owning features end to end—from architecture decisions to App Store delivery. You will work closely with product, design, and backend teams to deliver scalable, high-performance mobile experiences while maintaining clean, testable, and well-structured code. Responsibilities Design, build, and maintain advanced iOS applications, with Android considered a plus. Collaborate with cross-functional teams to define requirements, design solutions, and ship new features. Own performance, quality, and responsiveness across the mobile app. Identify and resolve performance bottlenecks, crashes, and complex bugs. Write clean, testable, and maintainable code, contributing to automation and CI/CD workflows. Integrate mobile applications with RESTful or GraphQL APIs and third-party libraries. Make informed architectural decisions suitable for scalable MVPs and growing products. Stay current with iOS best practices, platform updates, and modern mobile development trends. Actively participate in Agile/Scrum ceremonies, including planning, reviews, and technical discussions. Minimum Qualifications 8–10 years of professional experience in mobile development, with a strong focus on iOS. Proven track record of shipping at least one high-quality iOS app to the App Store. Deep proficiency in Swift and SwiftUI (or UIKit, depending on project needs). Solid understanding of the full mobile application development lifecycle, from concept to release and iteration. Strong knowledge of mobile UI/UX patterns and Apple platform guidelines. Hands-on experience integrating mobile apps with RESTful or GraphQL APIs. Proficiency with Git, Xcode, and modern dependency managers such as Swift Package Manager. Strong problem-solving skills, attention to detail, and ownership mindset. Advanced written and spoken English for collaboration in a distributed, international team. Preferred Qualifications Experience with UIKit, Combine, Async/Await, CoreData, or Realm. Experience implementing or customizing video playback features using AVPlayer / AVKit (or equivalent). Familiarity with Android development (Kotlin/Java) is a plus. Experience setting up or working with CI/CD pipelines for mobile applications. Experience using mobile performance and profiling tools (Instruments, Crashlytics, etc.). Background working in early-stage startups or building MVPs from scratch. Benefits Yearly Office Allowance Budget Macbook Purchase Support Wellbeing Support If you think that you are a good fit for the position, please apply through LinkedIn. Only CVs that are in English will be accepted. Flatiron Software Co has a zero tolerance to discrimination policy. In this regard, during the course of the evaluation of your job application and during all your employment relation, if any, all discriminatory factors such as race, sex, sexual orientation, social gender definitions/roles, colour, national or social background, ethnicity, religion, age, disablement, political opinion or any status that is protected under law shall be totally disregarded.