Sr. iOS, Android Developer

Ethereum Technologies LLC; Town of Texas (WI); Remote; USD 70,000 - 90,000; Full time

Job summary

A leading technology firm in the United States seeks a mobile application developer to design and maintain applications utilizing .NET, Java, Swift, or React Native. You'll collaborate with various teams to integrate RESTful APIs and ensure high-quality code. An ideal candidate will have over two years of relevant experience, a degree in computer science, and strong problem-solving skills. This role is inclusive of diverse applicants and offers a supportive work environment.

Qualifications

• 2+ years of experience in mobile application development.
• Proficiency in at least one mobile development language or framework.
• Understanding of Agile practices and UI/UX principles.

Responsibilities

• Develop and maintain mobile applications using various technologies.
• Integrate applications with RESTful APIs and third-party libraries.
• Participate in code reviews and maintain code quality.

Skills

Mobile application development

Cross-platform frameworks

User Interface design

Version control (Git)

Problem-solving

Education

Bachelor’s degree in computer science or related field

Tools

Android Studio

Xcode

Firebase

AWS

Job description

Responsibilities:

• Develop and maintain mobile applications using .NET/C#, Java/Kotlin, Swift, or React Native, following clean code principles.
• Implement user interfaces and features based on wireframes, designs, and technical requirements.
• Integrate mobile applications with RESTful APIs, backend services, and third‑party libraries (e.g., Firebase, Facebook SDK).
• Write unit and integration tests to ensure code quality and reliability.
• Debug and resolve issues reported by QA or end‑users, optimizing for performance and compatibility.
• Collaborate with cross‑functional teams (e.g., designers, product managers, backend developers) to deliver user‑friendly applications.
• Participate in code reviews to maintain code quality and consistency.
• Stay updated with mobile platform updates, SDKs, and development best practices.
• Contribute to technical documentation, including API usage and feature implementation details.
• Support the application lifecycle, including testing, release, and post‑launch maintenance.

Required Skills & Experience:

• Bachelor’s degree in computer science, Engineering, or a related field (or equivalent experience).
• 2+ years of experience in mobile application development.
• Proficiency in at least one mobile development language/framework (e.g., .NET MAUI, Java/Kotlin, Swift, React Native).
• Familiarity with mobile platform APIs, SDKs, and tools (e.g., Android Studio, Xcode).
• Experience with RESTful APIs, JSON, and web services integration.
• Knowledge of UI/UX design principles and platform‑specific guidelines.
• Understanding of version control systems (e.g., Git) and basic Agile practices.
• Strong problem‑solving skills and attention to detail.
• Ability to work collaboratively in a team environment.

Desired Skills & Experience:

• Experience with cross‑platform development frameworks (e.g., Flutter, Xamarin).
• Knowledge of mobile testing tools (e.g., JUnit, XCTest, Jest).
• Familiarity with cloud services (e.g., AWS, Firebase) and CI/CD pipelines.
• Understanding of mobile security practices (e.g., secure storage, API authentication).
• Contributions to released applications on the App Store or Google Play.

ETHEREUM TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. ETHEREUM TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will ETHEREUM TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract