Overview

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UST is a multinational company based in North America, a certified Top Employer and Great Place to Work, with over 35,000 employees across more than 35 countries. We are leaders in digital technology services, delivering large‑scale technological solutions to major companies.

Role Summary
Senior iOS Software Engineer. Passionate about building high‑quality mobile experiences at scale and contributing to impactful digital products. High English level is required.

Key Responsibilities

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- Contribute to the development of fully native mobile applications, ensuring a seamless and engaging user experience
- Collaborate with the Engineering Manager and team to evaluate technical decisions, risks, and architecture
- Act as a technical evangelist, mentoring and coaching junior engineers
- Develop well‑structured, scalable, and well‑tested code for iOS apps and backend orchestration services




- Drive innovation within the team and contribute to technical initiatives
- Work closely with senior engineers across teams to maintain a compelling mobile offering
- Promote engineering best practices including quality, testing, and collaboration

Mandatory Requirements

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- Proven experience delivering high‑quality native iOS applications at scale
- Strong programming skills in Swift and deep knowledge of the iOS ecosystem
- Expertise with modern iOS development tools: Git, Xcode, XCTest, XCUITest, Jenkins
- Solid understanding of iOS platform capabilities in enterprise environments
- Experience mentoring or guiding junior engineers
- Strong communication skills and ability to collaborate across teams
- Passion for quality, applying practices such as Pair Programming, TDD, and BDD
- Interest in cloud technologies, especially AWS
- English C1

Nice to Have

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- Hands‑on experience with AWS/cloud environments
- Experience wor

📌 Senior iOS Developer (Madrid)
🏢 Ust
📍 Madrid