Senior iOS Engineer

Arq; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Stock options

Discretionary bonus

Modern tools

World-class team

Fintech app in LATAM

In-office 3-4 days

Job summary

Arq is seeking a Senior iOS Engineer to help build elegant, reliable, and high-performance iOS apps. You will contribute high-quality Swift code, own features end-to-end, and raise engineering standards across the Core Product Team.

You’ll collaborate with Product, Design, and Backend teams to scale the ARQ experience from our flagship iOS app to new fintech products on the roadmap. 3-4 days in-office in London.

Qualifications

• 5+ years of professional iOS development experience.
• Strong proficiency in Swift and iOS ecosystem (UIKit, SwiftUI, Combine).
• Solid understanding of MVVM and Clean Architecture and testing practices.
• Strong ownership mindset and attention to detail when building user-facing products.
• Passion for crafting high-quality UI/UX and polished user experiences.
• Experience working in fintech or consumer tech startups.

Responsibilities

• Build and ship exceptional iOS experiences that are fast, intuitive, and delightful to use.
• Write clean, maintainable, and performant Swift code using modern iOS frameworks.
• Collaborate closely with Product, Design, and Backend teams to deliver features end-to-end.
• Contribute to the architecture and evolution of the iOS app as it scales.
• Own features from concept to launch, ensuring quality, polish, and reliability.
• Participate in code reviews and help improve engineering standards and best practices.
• Continuously improve app performance, stability, and user experience.

Skills

years of iOS experience

Swift

UI/UX attention to detail

MVVM/Clean Architecture

ownership mindset

fintech/startup experience

Job description

What We’re Looking For

We’re looking for a Senior iOS Engineer who’s passionate about building elegant, reliable, and high-performance products that users love. You’ll be a hands-on engineer, contributing high-quality code and helping raise the bar for engineering standards across the team.

You’ll join our Core Product Team, helping to build and scale the ARQ experience — from our flagship iOS app to new product lines like Premium, Credit, and other financial products on the roadmap.

What You’ll Be Doing

• Build and ship exceptional iOS experiences that are fast, intuitive, and delightful to use.

• Write clean, maintainable, and performant Swift code using modern iOS frameworks.

• Collaborate closely with Product, Design, and Backend teams to deliver features end-to-end.

• Contribute to the architecture and evolution of the iOS app as it scales.

• Own features from concept to launch, ensuring quality, polish, and reliability.

• Participate in code reviews and help improve engineering standards and best practices.

• Continuously improve app performance, stability, and user experience.

What You’ll Need

• 5+ years of professional experience in iOS development, building apps used by thousands or millions of users.

• Strong proficiency in Swift and the iOS ecosystem (UIKit, SwiftUI, Combine, etc.).

• Solid understanding of architecture patterns (MVVM, Clean Architecture) and testing practices.

• Strong ownership mindset and attention to detail when building user-facing products.

• Passion for crafting high-quality UI/UX and polished user experiences.

• Experience working in fast-paced environments, ideally in fintech or consumer tech startups.

Benefits

• Competitive salary and benefits

• Stock options, so you own part of what you build

• Discretionary performance bonus

• The latest tools and technology

• A world-class team that will challenge and grow your skills

• The opportunity to help build the best fintech app in Latin America

• Office Policy: 3-4 days a week in-office

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