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Senior Kotlin Developer Jobs in California (NOW HIRING)

InterSources Inc

Sr. Android Developer

Fremont, CA · On-site

$63.75 - $80.75/hr

They are seeking a Sr. Android Developer with strong hands-on experience in Android development, Java, and Kotlin to contribute to their projects. Responsibilities : • Strong hands-on Sr. Developer ...

Net Orbit

Sr. Android Developer

San Francisco, CA · On-site

$68.25 - $86.50/hr

Position: Sr. Android Developer Location: NY, NJ, Bay Area Duration:12 months • Overall 7+ years ... in Kotlin • Experience with Reactive Programming (RxJava), Dependency Injection (Dagger ...

Esri

Sr. Software Developer - Android Apps

Redlands, CA

$58.25 - $74/hr

As a Senior Software Developer, you'll drive technical direction, mentor others, and architect ... Kotlin programming * Developing on the Android platform * Object oriented design skills * Data ...

HiveWatch

Senior Staff Engineer

El Segundo, CA

$200K - $235K/yr

Be a technical leader of Platform/DevOps initiatives including systems architecture and design ... Languages: Kotlin, Rust, TypeScript, and Python * Deployments: GitHub Actions, Terraform ...

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Senior Kotlin Developer information

What is a senior Kotlin developer?

Senior Kotlin Developers are experienced software engineers who specialize in developing applications using the Kotlin programming language. They typically work on backend services, Android applications, or cross-platform solutions, leveraging Kotlin’s modern features and interoperability with Java. In addition to coding, they often lead teams, design software architecture, mentor junior developers, and ensure best practices in software development. Their expertise is valuable for companies seeking efficient, scalable, and maintainable codebases, especially in environments where Kotlin is a primary technology.

What are the key skills and qualifications needed to thrive as a senior Kotlin developer?

To thrive as a Senior Kotlin Developer, you need deep expertise in Kotlin programming, object-oriented design, and software development principles, often supported by a bachelor's degree in computer science or a related field. Familiarity with tools like IntelliJ IDEA, Git, Gradle, and frameworks such as Spring Boot or Ktor, along with experience in RESTful APIs and version control systems, is typically required. Strong problem-solving skills, effective communication, and the ability to mentor junior developers are standout soft skills for this role. These abilities are crucial for building robust, scalable applications and fostering technical leadership within development teams.

What are some common challenges senior Kotlin developers face when integrating Kotlin with existing Java codebases?

Senior Kotlin Developers often work on projects where Kotlin is gradually introduced to legacy Java codebases. A key challenge is ensuring seamless interoperability between Kotlin and Java, which requires careful handling of nullability, type conversions, and tooling compatibility. Developers also need to maintain consistent coding standards and documentation across mixed-language projects. Effective communication with team members is essential to coordinate refactoring efforts and share best practices for code migration.

What is the difference between Senior Kotlin Developer vs Android Developer?

AspectSenior Kotlin DeveloperAndroid Developer
Required CredentialsBachelor's in Computer Science, Kotlin proficiency, experience in software developmentBachelor's in Computer Science, Java/Kotlin skills, Android SDK knowledge
Work EnvironmentSoftware development teams, cross-platform projects, backend and mobile appsMobile app development teams, primarily focused on Android apps
Industry UsageTech companies, startups, enterprise softwareMobile app companies, startups, freelance developers
Search & Comparison IntentUnderstanding senior-level Kotlin roles, career progressionEntry to mid-level Android app development, job requirements

The Senior Kotlin Developer typically has broader responsibilities, including architecture design and mentoring, while an Android Developer focuses mainly on building Android applications. Both roles require Kotlin skills and industry experience, but the Senior Kotlin Developer often works across multiple platforms and project phases.

What are the most commonly searched types of Kotlin Developer jobs in California?

The most popular types of Kotlin Developer jobs in California are:

What are popular job titles related to Senior Kotlin Developer jobs in California?

For Senior Kotlin Developer jobs in California, the most frequently searched job titles are:

What job categories do people searching Senior Kotlin Developer jobs in California look for?

The top searched job categories for Senior Kotlin Developer jobs in California are:

What cities in California are hiring for Senior Kotlin Developer jobs?

Cities in California with the most Senior Kotlin Developer job openings:

Senior Kotlin Developer jobs near you
Infographic showing various Senior Kotlin Developer job openings in California as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution.

Android Senior Developer /Fremont, CA ,6+ Months Contract

Fremont, CA • On-site

Suncap Technology
Recruiting and Staffing Services • 51 - 200 employees
Learn more about Suncap Technologyexternal

$63.75 - $80.75/hr

Full-time

Re-posted 9 days ago

Job description

Job Summary:
Suncap Technology is looking for an Android Senior Developer to join their team. The role requires extensive experience in Android mobile app development, particularly with Kotlin and Java programming. Candidates will be expected to work onsite and participate in in-person client interviews.
Responsibilities:
• Around 10 years of experience in Android based mobile app development.
• Hands-on experience in the below tech stack
• Kotlin Programming
• Java Programming
• JavaScript Programming skills
• Functional & Object-oriented programming
• Kotlin basics - Singleton, Data Class, Companion objects, Open/Sealed Class/Public, var & val, Null Safety, coroutines
• MVVM/MVP/MVC, Singleton/Façade/Observer
• Invoking Kotlin from Java and Vice Versa
• Extension function, Lazy initialization, late init modifier, higher order function , inline function
• Exposure to Junit, Mockito, Kotlin test
• GIT, Jenkins/Gradle, Detekt, SonarQube
• Working knowledge in Agile based development
• JIRA and Confluence
• Good communication and articulation skills
Qualifications:
Required:
• Around 10 years of experience in Android based mobile app development.
• Hands-on experience in Kotlin Programming
• Hands-on experience in Java Programming
• Hands-on experience in JavaScript Programming skills
• Hands-on experience in Functional & Object-oriented programming
• Hands-on experience in Kotlin basics - Singleton, Data Class, Companion objects, Open/Sealed Class/Public, var & val, Null Safety, coroutines
• Hands-on experience in MVVM/MVP/MVC, Singleton/Façade/Observer
• Hands-on experience in Invoking Kotlin from Java and Vice Versa
• Hands-on experience in Extension function, Lazy initialization, late init modifier, higher order function, inline function
• Exposure to Junit, Mockito, Kotlin test
• Experience with GIT, Jenkins/Gradle, Detekt, SonarQube
• Working knowledge in Agile based development
• Working knowledge in JIRA and Confluence
• Good communication and articulation skills
Preferred:
• Local candidates are preferred.
Company:
Suncap Technology is a staffing firm that provides recruiting and financial staffing services. Founded in , the company is headquartered in Davie, USA, with a team of 51-200 employees. The company is currently Growth Stage.
Suncap Technology Executive and Financial Staffing logo

About Suncap Technology Executive and Financial Staffing

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Suncap Technology Executive and Financial Staffing is a unique staffing firm specializing in creating custom-matched connections between professionals and companies in temporary, contract-to-hire, direct hire and retained positions. We provide staffing & industry-specific solutions for hiring with confidence.

Industry

Recruiting and staffing services

Company size

51 - 200 Employees

Headquarters location

Davie, FL, US

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