iOS Software Engineer

Barclays; City of Edinburgh; On-site; GBP 45,000 - 70,000; Full time

Job summary

Barclays is seeking an iOS Software Engineer in Edinburgh to develop high-quality mobile applications. You will collaborate with product teams and contribute to Agile methodologies to deliver scalable and efficient solutions.

The ideal candidate possesses strong experience in Swift and a profound understanding of iOS SDK. This role emphasizes both technical excellence and a pragmatic approach to engineering challenges.

Join us to work in a dynamic environment that encourages innovation and continuous improvement.

Qualifications

• Demonstrable experience building and maintaining production iOS apps using Swift.
• Good understanding of the iOS SDK, app lifecycle, and Apple frameworks.
• Excellent grasp of OOP and SOLID principles.

Responsibilities

• Develop high-quality mobile features that reach customers.
• Collaborate with cross-functional teams on software requirements.
• Contribute to sprint planning and continuous delivery of features.

Skills

iOS App Development

OOP and SOLID principles

Understanding of iOS SDK

Critical thinking and debugging

Knowledge of CI systems

Tools

Swift

Jenkins

XCUITest

Job description

Accountabilities

• Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance.
• Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives.
• Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing.
• Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth.
• Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions.
• Implementation of effective unit testing practices to ensure proper code design, readability, and reliability.
• To perform prescribed activities in a timely manner and to a high standard consistently driving continuous improvement.
• Requires in-depth technical knowledge and experience in their assigned area of expertise.
• Thorough understanding of the underlying principles and concepts within the area of expertise.
• They lead and supervise a team, guiding and supporting professional development, allocating work requirements and coordinating team resources.
• If the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others.
• OR for an individual contributor, they develop technical expertise in work area, acting as an advisor where appropriate.
• Will have an impact on the work of related teams within the area.
• Partner with other functions and business areas.
• Takes responsibility for end results of a team’s operational processing and activities.
• Escalate breaches of policies / procedure appropriately.
• Take responsibility for embedding new policies/ procedures adopted due to risk mitigation.
• Advise and influence decision making within own area of expertise.
• Take ownership for managing risk and strengthening controls in relation to the work you own or contribute to. Deliver your work and areas of responsibility in line with relevant rules, regulation and codes of conduct.
• Maintain and continually build an understanding of how own sub-function integrates with function, alongside knowledge of the organisations products, services and processes within the function.
• Demonstrate understanding of how areas coordinate and contribute to the achievement of the objectives of the organisation sub-function.
• Make evaluative judgements based on the analysis of factual information, paying attention to detail.
• Resolve problems by identifying and selecting solutions through the application of acquired technical experience and will be guided by precedents.
• Guide and persuade team members and communicate complex / sensitive information.
• Act as contact point for stakeholders outside of the immediate function, while building a network of contacts outside team and external to the organisation.

All colleagues will be expected to demonstrate the Barclays Values of Respect, Integrity, Service, Excellence and Stewardship – our moral compass, helping us do what we believe is right. They will also be expected to demonstrate the Barclays Mindset – to Empower, Challenge and Drive – the operating manual for how we behave.

Join us as an iOS Software Engineer within our Engineering Centre of Excellence, collaborating closely with a wider community of mobile developers across both iOS and Android.

You’ll work as part of a cross-functional product team alongside Android engineers, testers, analysts, designers, a Scrum Master, and a Product Owner. Together, you’ll design, build, and deliver high-quality mobile features that reach our customers.

We work in an agile environment, where you’ll contribute to sprint planning, reviews, and continuous delivery of features. Beyond your team, you’ll play an active role in knowledge sharing across the mobile community, helping ensure consistency and quality across the app.

We’re looking for someone pragmatic and delivery-focused, who can balance technical excellence with real-world constraints. You’ll have the opportunity to learn from experienced engineers, contribute to best practices, and grow your skills within a supportive environment.

This role offers the chance to work in a highly regulated industry, giving you exposure to complex systems, strong engineering standards, and meaningful, large-scale products.

Required Experience

To be successful as an iOS Software Engineer, you should have experience with:

iOS App Development

• Demonstrable experience building and maintaining production iOS apps using Swift (SwiftUI and/or UIKit)
• Good understanding of the iOS SDK, app lifecycle, and Apple frameworks
• Demonstrates critical thinking and resourcefulness when debugging issues, evaluating trade-offs, and solving complex problems

Software Engineering Fundamentals & Architecture

• Excellent grasp of OOP and SOLID principles
• Working knowledge of common iOS design patterns (e.g. MVC, MVVM, Coordinator)
• Ability to write maintainable, testable and scalable code
• Clear communicator who can work effectively with cross-functional teams
• Comfortable explaining technical decisions and contributing to team discussions

Some other highly valued skills may include

• Experience with CI systems (e.g. Jenkins, GitLab CI)
• Familiarity with automated testing and release pipelines

Product Mindset

• Understands user needs and business context when making technical decisions
• Balances code quality with delivery and user impact

Testing & Quality Practices

• Experience with unit/UI testing (Swift Testing, XCUITest)
• Awareness of testing strategies (e.g. TDD)

You may be assessed on the key critical skills relevant for success in role, such as risk and controls, change and transformation, business acumen strategic thinking and digital and technology, as well as job-specific technical skills.