What are the responsibilities and job description for the Sr. Mobile Application Engineer (iOS & Android) position at CoSourcing Partners - Enterprise-AI and IT Services Company?

Sr Mobile Application Engineer (iOS & Android)

Location : Downtown Chicago (On-site)

Employment Type : Contract to Hire (W2 required)

Citizenship Status : U.S. Citizen, EAD, or Green Card required

Position Summary : We are seeking an experienced Sr. Mobile Application Engineer with expertise in both iOS and Android development to join our dynamic team. This role is essential for developing, enhancing, and maintaining robust mobile applications that support our large-scale global operations. The ideal candidate will have experience in delivering high-quality mobile applications for global audiences, working closely with cross-functional teams to build seamless, user-centered digital experiences.

Key Responsibilities :

End-to-End Mobile Development : Design, develop, and maintain advanced mobile applications for both iOS and Android platforms.
API Integration : Work with back-end engineers to integrate APIs and digital services into mobile applications. Ensure API data is effectively consumed in the mobile UI and meets performance, scalability, and security requirements.
Collaborate Across Teams : Partner with designers, product managers, and other engineers to deliver high-quality, user-centered features and enhancements. Contribute to feature planning, technical specifications, and project timelines.
Code Reviews and Mentorship : Conduct code reviews and provide feedback to maintain a high standard of code quality. Mentor junior engineers, providing guidance on mobile development best practices and architectural decisions.
Performance Optimization : Continuously optimize mobile applications for speed, efficiency, and scalability. Monitor app performance, troubleshoot issues, and identify areas for improvement.
Testing & Quality Assurance : Develop and maintain unit tests, UI tests, and automated testing scripts to ensure application reliability and a smooth user experience. Work with QA teams to establish testing protocols and conduct thorough debugging sessions.
Documentation and Knowledge Sharing : Document code, processes, and architectural decisions for future reference and team onboarding. Share best practices with the team to promote a culture of continuous learning.

Skills and Qualifications :

Technical Expertise :

iOS : Proficiency with Swift and Objective-C, experience with CoreData, UIKit, Core Animation, and other core iOS frameworks.

Android : Strong command of Kotlin and Java, experience with Android SDK, Jetpack libraries, and key components (LiveData, ViewModel, Room, etc.).

Cross-Platform Knowledge : Familiarity with cross-platform tools like React Native or Flutter is a plus.

API Integration : Skilled in working with RESTful APIs, GraphQL, and web services, ensuring smooth and efficient data exchange between mobile and back-end systems.

Database Knowledge : Experience with local storage solutions (e.g., Realm, SQLite) and caching mechanisms for mobile applications.

Digital Services Integration : Familiarity with digital services such as push notifications, in-app purchases, third-party SDKs, and cloud messaging (Firebase, AWS, etc.).

Development Practices :

Proficient in Git and source control management, including branching strategies and pull request processes.

Strong understanding of mobile app architecture patterns (MVC, MVVM, MVP, Clean Architecture).

Experience with CI / CD pipelines, specifically for mobile applications, ensuring efficient and automated app delivery.

Knowledge of security best practices for mobile applications, including secure storage, encryption, and data protection techniques.

Analytical and Problem-Solving Skills :

Ability to analyze complex problems and implement solutions quickly, maintaining a high-quality user experience.

Strong debugging and diagnostic skills, with familiarity with mobile performance profiling tools.

Soft Skills :

Excellent communication and collaboration skills, with a team-oriented approach to achieving shared goals.

Strong attention to detail, with a passion for delivering exceptional user experiences and scalable solutions.

Experience :

Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

Minimum 5 years of professional mobile development experience with large-scale, high-traffic global applications.

Proven track record of building, deploying, and maintaining iOS and Android applications used by global audiences.

Preferred Qualifications :

Experience with Agile development methodologies (Scrum, Kanban).

Experience in A / B testing, feature flagging, and release management for global audiences.

Familiarity with analytics tools (Google Analytics, Firebase, etc.) for tracking mobile application metrics and user behavior

Contract to Hire : This role offers the opportunity for full-time employment based on performance.

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Sr. Mobile Application Engineer (iOS & Android)

What are the responsibilities and job description for the Sr. Mobile Application Engineer (iOS & Android) position at CoSourcing Partners - Enterprise-AI and IT Services Company?

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