Senior Software Engineer – Mobile (iOS)

Company: United States Digital Space LLC
Apply for the Senior Software Engineer – Mobile (iOS)
Location: London
Job Description:

Senior Software Engineer – Mobile (iOS)

Location: London

Salary: £76,760 – £95,950

Hours: Full time

Working Pattern: Hybrid – at least two days per week (or 40% of time) at an office site. Workplace adjustments available including hybrid working expectations.

Flexible Working Options: Hybrid Working, Job Share

What you’ll be doing

In this role, you’ll partner with a cross‑functional team to design, build and ship small, high‑quality features, using strong iOS engineering skills to deliver innovative, customer‑facing experiences. You’ll sweat the details, spot opportunities to add extra value for users, and keep the app fast and reliable by fixing bugs and continuously improving performance.

You’re an exceptional developer of mobile applications with a solid focus on iOS. You don’t just put your head down and code. You’re constantly seeking a better way to do things – a cleaner, more intuitive interaction. You’ve studied the most popular mobile apps and have well‑articulated theories about why they are designed the way they are.

This position requires collaboration with designers, product managers and other engineering teammates. If you’re thrilled by ownership, passionate about creating new features and services from scratch, and think you can manage ambiguity and pace, we would love to hear from you.

Why Join us

We’re a pioneering, fast‑changing business shaping finance as a force for good. If you’re looking for a role where you can have an impact and do your best work, you’ve found it.

What we’re looking for

  • 5+ years’ experience building apps with Swift, SwiftUI, UIKit, Swift Concurrency
  • Experience shipping apps to the App Store
  • Experience writing tests (unit, integration, UI, etc.)
  • Experience working in an Agile/Scrum environment
  • Strong understanding of Object Oriented Programming
  • Genuine interest in fast‑paced fintech or payments startup environment

We recognise that skills are developed in many ways. If you have relevant, transferable experience, we encourage you to apply.

Benefits

  • Generous pension contribution up to 15%
  • Annual bonus award, subject to group performance
  • Share schemes, including free shares
  • Benefits you can adapt to your lifestyle, such as discounted shopping
  • 30 days’ holiday, plus bank holidays
  • Range of wellbeing initiatives and generous parental leave policies

We offer reasonable workplace adjustments for colleagues with disabilities, including flexibility in office attendance, location, and working patterns. As a Disability Confident Leader, we guarantee interviews for a fair and proportionate number of applicants who meet the minimum criteria for the role with a disability, long‑term health or neurodivergent condition.

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Posted: June 15th, 2026