Software Engineer (Mobile Security)

Software Engineer - Mobile Security
12-Month Contract
Bristol (Hybrid - 2-3 days per week onsite)
£500-£850 per day Inside IR35 - Ratedetermined by experience

We're looking for Mobile Security Engineers to join a Digital Frameworks team responsible for building and maintaining the secure Android and iOS frameworks that support mobile applications across a large enterprise environment.

This role sits at the intersection of mobile software engineering and application security. You'll help design and develop reusable SDKs, libraries and framework components that enable product teams to deliver secure, scalable and high-performing mobile applications.

We're interested in speaking with engineers from Android, iOS or mobile platform backgrounds, with opportunities available across multiple levels of experience.

Key Requirements

Commercial experience developing mobile applications using Kotlin/Android and/or Swift/iOS
Strong understanding of mobile application security principles
Experience implementing authentication, encryption and secure storage solutions
Knowledge of secure coding practices and vulnerability remediation
Experience developing reusable SDKs, frameworks or shared platform components
Ability to work within modern engineering environments using CI/CD and automated testing practicesWhat You'll Be Doing

Designing, developing and maintaining secure Android and iOS framework components and SDKs
Building mobile security capabilities including authentication, encryption and device integrity controls
Developing reusable libraries and platform services used across multiple applications
Supporting threat modelling exercises and security design reviews
Identifying and remediating security vulnerabilities
Implementing secure coding standards and engineering best practice
Contributing to test automation and CI/CD pipelines
Collaborating with engineering, architecture and security teams
Driving continuous improvements in mobile security standards and practicesTechnical Skills

Mobile Development

Kotlin
Android
Swift
iOS
SwiftUI
UIKit
Jetpack
Android SDK
Swift Package ManagerMobile Security

OWASP Mobile Top 10
OWASP MASVS
Mobile Application Security
Secure Coding
Threat Modelling
Authentication & Authorisation
Encryption
Secure Storage
Certificate Pinning
Biometrics
Android Keystore
iOS Keychain
Device Integrity ControlsTesting & Security Tooling

JUnit
XCTest
Espresso
XCUITest
Static Analysis
Dependency Scanning
Penetration Test RemediationCI/CD & DevOps

Git
GitHub Actions
Jenkins
Bitrise
Fastlane
CI/CD PipelinesAPIs & Identity

REST APIs
OAuth 2.0
OpenID Connect
API SecurityDesirable Experience

Financial Services, FinTech or regulated industries
Digital Identity or Authentication products
Shared Platform, SDK or Framework development
Mobile security testing tools such as MobSF or Frida
Security certifications including OSCP, GMOB, CISSP or equivalentThis is an excellent opportunity for a Mobile Engineer with a passion for security, or a Mobile Security Specialist looking to work on large-scale platforms that underpin critical mobile applications.

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change