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 frameworks

Benefits

23 days of Annual Leave plus the 24th and 31st of December as discretionary days
Numerous benefits (Health Care Plan, Internet Connectivity, Life and Accident Insurances)
Retribution Adaptable Program: Meals, Kinder Garden, Transport, online English lessons, Health Care Plan, etc.
Free access to several training platforms
Professional stability and career plans
Referral compensation program
Option to pick between 12 or 14 payments along the year
Real Work‑Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summer)
UST Club Platform discounts and gym access discounts

Equal Opportunity Statement
UST is committed to equal opportunities in our selection processes and does not discriminate based on race, gender, disability, age, religion, sexual orientation or nationality. We have a special commitment to disability & inclusion, so we are interested in hiring people with disability certificates.
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📌 Senior iOS Developer (Remote from Spain) (Madrid)
🏢 Ust
📍 Madrid