Senior iOS Engineer

Job Description

Fever's mobile app is one of the main ways users explore and book experiences in their cities. Helping them find relevant events easily and enjoy a smooth, personalized journey through the app is a key part of delivering a great product. We're looking for a Senior iOS Engineer with a strong product mindset to join the Data Team and help power the systems that make discovery and personalization smarter inside the app. This role sits at the intersection of iOS development, user behavior insights, and product intelligence, ensuring that the app not only looks great and performs smoothly, but also understands what users care about and helps them find the right events at the right time. You won't just ship features — you'll own them end-to-end: shaping the idea, building it, defining what success looks like, measuring adoption, and iterating based on real user signals. You'll work closely with Product, Backend, and Data teams to improve how we capture and use in-app signals, enabling better recommendations, more relevant discovery surfaces, and a continuously improving user experience.

Job Responsibility

Own features end-to-end: partner with Product to shape what gets built, ship it, define success metrics, measure adoption post-launch, and iterate based on results
Design and maintain a robust, scalable mobile instrumentation layer to capture high-quality user interaction data
Ensure the app provides the right signals to power AI recommendation and discovery systems, making event discovery smarter and more relevant
Collaborate with Product, Backend, and Data teams to build measurable and data-informed features, ensuring discovery surfaces continuously improve
Contribute to shared libraries and best practices for mobile development, data quality, and scalability
Understand the technical trade-offs of different solutions and design implementations that scale for millions of users

Requirements

Strong development experience in Swift and a solid understanding of the iOS SDK, including UIKit, SwiftUI, and Combine
Strong product mindset — you care about the why behind features, take ownership of outcomes (not just code), and are comfortable defining success metrics and measuring adoption
Experience building features that support recommendations, discovery, search, or personalization is a strong plus
Comfortable working with data-driven features, understanding how to capture and leverage signals to improve user experience
You write clean, maintainable code with a focus on testing, reliability, and scalability
Collaborative team player who can communicate clearly with engineers, product managers, and data professionals
You know how to deliver code from development to production and are familiar with CI/CD pipelines and mobile release processes
Proficient in English, able to participate effectively in cross-functional discussions and planning
Comfortable using AI tools in your daily workflow and able to evaluate and leverage them effectively to improve productivity and decision-making

Nice to have

Have hands-on Android development experience (Kotlin, Jetpack Compose)
Have worked on marketplace consumer apps: recommendation engines, feeds, or AI-driven personalization in a consumer app
Have experience with analytics, feature flags, or experimentation frameworks on mobile
Have contributed to high-traffic, data-heavy apps where performance and scalability are critical
Are comfortable collaborating beyond iOS, helping define tracking and data contracts with backend or data teams

What we offer

Opportunity to have a real impact in a high-growth global category leader
40% discount on all Fever events and experiences
Home office friendly (anywhere in Spain)
Responsibility from day one and professional and personal growth
Great work environment with a young, international team of talented people to work with
Health insurance and flexible remuneration with 100% tax exemption through Cobee
English and Spanish lessons
Gympass membership
Possibility to receive in advance part of your salary by Payflow
Competitive compensation package consisting of base salary, variable bonus, and stock options

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Senior iOS Engineer - Data Team

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