Senior Software Engineer - Mobile (IOS)

The Senior iOS Developer is a hands-on senior contributor to Esyasoft's iOS app, a key surface for our clients and end-users. The role combines high-quality individual delivery with active mentorship of mid-level iOS engineers and contribution to platform direction. The role owns:

• Hands-on delivery of features and improvements to Esyasoft's iOS app
• Quality, performance and reliability of iOS code
• Code review and mentoring of less senior iOS engineers (as required)
• Contribution to architectural decisions on the iOS codebase Key Responsibilities & Areas of Ownership A. iOS Development
• Maintain and develop high-quality iOS code aligned to agreed technical requirements
• Provide hands-on technical knowledge in iOS architecture, design and ongoing improvement B. Architecture, Patterns and Practice
• Develop using modern iOS architecture (MVVM / MVVM-C, SwiftUI where appropriate, UIKit where established)
• Champion SOLID principles, clean architecture and testable code
• Contribute to architectural decisions across the iOS codebase C. Quality, Code Review and Releases
• Write well-tested code (unit tests as standard); partner with the QA team on integration and UI test coverage where relevant
• Participate in code review with rigor
• Support release management — staged roll outs, monitoring, post-release follow-through D. Cross-Functional Collaboration
• Communicate clearly with non-technical stakeholders including product and design — explain trade offs without losing them
• Work with backend and data teams to ensure any blockers or issues with APIs or data are resolved E. Security, Data Privacy and Compliance
• Adhere to Esyasoft's data protection and security policies — Cyber Essentials, ISO 27001 and PCI-DSS where relevant
• Embed secure-by-default patterns in iOS code — secure storage, key chain hygiene, certificate pinning, secrets management F. Learning and Engineering Growth
• Keep up with the evolving iOS ecosystem — new APIs, framework updates, Apple platform changes
• Bring practical innovation into the team — prove value first, then adopt Requirements Required Skills & Experience
• Demonstrable senior-level commercial experience as a native iOS developer
• Strong commercial experience with Swift and the modern iOS development stack (MVVM, SwiftUI, UIKit)
• Extensive experience of RESTful API and third-party integration
• Experience of TDD, BDD or other code testing practices; understanding of data structures and algorithms Desirable Skills & Experience
• Commercial experience with Apple Map. Kit or other mapping platforms; e-commerce or payment gateways
• Experience with Combine, Swift Concurrency and SwiftUI
• Experience with automated UI testing (XCUITest, Snapshot Testing) and CI/CD pipelines Key Attributes
• Curious — actively keeps up with iOS evolution; willing to experiment responsibly
• Pragmatic — values clarity and shipped quality over cleverness
• Collaborative — communicates confidently with the wider business; comfortable in a multi-disciplinary team Use of Technologies Esyasoft includes the requirement to work as a competent user of:
• iOS (Swift primary, SwiftUI, UIKit) and Xcode
• RESTful APIs, Firebase, Apple frameworks, mapping and payment integrations
• iOS CI/CD (Fastlane, GitHub Actions); crash and performance tooling (Crashlytics, Sentry) This role may also require flexibility to work with new mobile platforms and tools as Esyasoft's mobile strategy evolves.