Mobile Developer (contract) - Northern Trust : Job Details

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As a Senior Mobile Accelerator Engineer, you will own the design, development, and evolution of our reusable mobile frameworks, CI/CD pipelines, and best-practice accelerators. Youll partner closely with product-line engineering teams, architects, security, and QA to ensure new features, performance optimizations, and security controls are integrated seamlessly across our iOS, Android, and hybrid platforms. Key Responsibilities

• Framework & SDK Development
• Architect and implement modular, reusable iOS (Swift/Objective-C) and Android (Kotlin/Java) SDKs and libraries
• Define and enforce design patterns (MVC, MVVM, Clean Architecture) across accelerator modules
• Hybrid & PWA Integration
• Build and maintain bridges for React Native and PWA micro-frontends within native shells
• CI/CD & Automation
• Design and optimize end-to-end pipelines using Azure DevOps and GitHub Actions (Fastlane, Firebase App Distribution, Play/App Store publishing)
• Develop automated UI and regression testing suites (XCTest, Espresso, Appium)
• Performance & Quality Engineering
• Profile, benchmark, and tune app performance (Instruments, Android Profiler)
• Integrate static analysis and security scans (SonarQube, Checkmarx, Zimperium RASP)
• Security & Compliance
• Implement secure storage, encryption, certificate pinning, and OAuth/OIDC best practices (Okta, Entra ID)
• Ensure alignment with financial-services compliance (PCI-DSS, ISO 20022 data handling)
• Telemetry & Monitoring
• Instrument analytics, crash-reporting, and alerting (Firebase, Dynatrace, Google Analytics, Crashlytics)
• Build dashboards for real-time health and usage metrics
• Collaboration & Enablement
• Mentor and guide product-team engineers in adopting accelerator components
• Drive documentation, sample apps, and workshops to increase framework adoption

Required Qualifications

• 5+ years of native iOS (Swift/Objective-C) and Android (Kotlin/Java) development
• Demonstrated experience building and publishing reusable SDKs/libraries
• Expertise with Azure DevOps and/or GitHub Actions for mobile pipelines
• Hands-on experience with Docker and Azure Kubernetes Service (AKS) for container orchestration
• Strong understanding of mobile app security, encryption, and OAuth/OIDC flows
• Proven track record in performance profiling and static-analysis integration
• Excellent written and verbal communication; ability to craft clear docs and samples
• Bachelors or Masters in Computer Science, Software Engineering, or equivalent

Preferred Experience

• Hybrid/mobile web expertise: React Native or PWA micro-frontend patterns
• Background in financial-services or regulated-industry mobile apps
• Familiarity with API gateway patterns (Akamai, Azure Front Door & APIM, Google Cloud)
• Exposure to enterprise-scale mobile security tools (Zimperium, NowSecure)
• Scrum/Agile practitioner with experience writing epics, features, and user stories

Pay Rate Range Min Pay Rate Max Pay Rate Currency Unit 68 80 USD hourly Additional Notes The above listed pay range is a good faith estimate of what the employer reasonably expects to pay for this position. Benefits Information Optional benefits offering includes medical, dental, vision and retirement benefits via Hiregenics. Seniority level

• Seniority level Mid-Senior level

Employment type

• Employment type Contract

Job function

• Job function Engineering and Information Technology

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