Sr. Fullstack Engineer

Job#: 3045513

Job Description:

Senior Mobile Engineer

Location: Burlingame, California (Hybrid Onsite)

Work Type: Contract

Role Overview

We are seeking a Senior Mobile Developer with deep expertise in Android application development using Kotlin. This individual will design, build, and maintain high-performance mobile applications, playing a key role in architecting scalable solutions and driving technical best practices. The role involves collaboration with product, design, QA, and backend engineering teams to deliver exceptional mobile experiences, with a focus on leveraging AI-Assisted tooling for development.

Key Responsibilities

• Design, develop, and maintain native Android applications using Kotlin.
• Architect scalable, maintainable, and high-performing mobile solutions.
• Build modern user interfaces using Jetpack Compose and Android UI frameworks.
• Implement and maintain application architectures such as MVVM, Clean Architecture, and modular design patterns.
• Integrate RESTful APIs and backend services to enable secure and reliable data exchange.
• Optimize application performance, stability, security, and responsiveness.
• Develop and execute unit tests, integration tests, and automated testing strategies.
• Participate in code reviews and provide technical leadership across the development team.
• Collaborate with Product Managers, UX/UI Designers, QA Engineers, and Backend Developers to deliver business-critical features.
• Troubleshoot production issues and implement long-term solutions.
• Contribute to CI/CD pipelines and mobile release processes.
• Mentor junior and mid-level engineers and promote engineering best practices.

Required Qualifications

• 7+ years of software development experience, with a majority of time spent in Mobile/Kotlin development.
• Hands-on experience using AI-assisted tooling for development and workflows (e.g., Claude, Codex, Cursor, Gemini).
• Strong experience within Android Architecture and frameworks.
• Experience working with RESTful APIs and SDK.
• Experience with mobile testing frameworks such as JUnit and Espresso.
• Strong understanding of Agile software development methodologies.
• Strong knowledge of multithreading, concurrency, and asynchronous programming.

Preferred Qualifications

• Experience with React Native or cross-platform mobile frameworks.
• Experience with Kotlin Multiplatform (KMP).
• Experience building CI/CD pipelines using Jenkins, GitHub Actions, Bitrise, TeamCity, or similar tools.
• Knowledge of Firebase services.
• Experience working with mobile security, authentication, and encryption.
• Familiarity with cloud technologies such as AWS, Azure, or Google Cloud Platform.
• Experience publishing and maintaining applications in the Google Play Store.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.

Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.

Employee Type:

Contract

Location:

Burlingame, CA, US

Job Type:

Applications and Data Management

Date Posted:

August 14, 2026

Pay Range:

$70 - $85 per hour

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