Overview
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
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
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
Hands‑on experience with AWS/cloud environments
Experience working in complex or regulated environments
Strong problem‑solving mindset focused on real‑world challenges
Curiosity and willingness to learn new technologies, tools, and framewo
📌 Senior iOS Developer (Madrid)
🏢 Ust
📍 Madrid