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Freelance Kotlin Multiplatform Developer Jobs (NOW HIRING)

Prolaio

Mobile Android Engineer

Chicago, IL · On-site

... Android Developer to join our Engineering team. In this role, you will enhance our mobile ... Kotlin Multiplatform: Experience working on Kotlin Multiplatform projects for both Android and iOS.

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How much do freelance kotlin multiplatform developer jobs pay per hour?

As of Jun 22, 2026, the average hourly pay for freelance kotlin multiplatform developer in the United States is $61.13, according to ZipRecruiter salary data. Most workers in this role earn between $53.61 and $70.43 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Freelance Kotlin Multiplatform Developer, and why are they important?

To thrive as a Freelance Kotlin Multiplatform Developer, you need strong expertise in Kotlin, cross-platform mobile and backend development, and experience with both Android and iOS ecosystems, often supported by a degree in computer science or equivalent experience. Familiarity with development tools such as Android Studio, IntelliJ IDEA, Git, and build systems like Gradle, as well as knowledge of Ktor, SQLDelight, and multiplatform libraries, is essential. Excellent problem-solving skills, self-motivation, and proactive communication with clients set top freelancers apart. These skills ensure you can deliver robust, maintainable solutions across platforms while effectively managing projects and client expectations.

What is a Freelance Kotlin Multiplatform Developer?

A Freelance Kotlin Multiplatform Developer is a self-employed software developer who specializes in building applications using Kotlin Multiplatform, a technology that allows sharing code across Android, iOS, web, and desktop platforms. They work on a contract basis for various clients, helping to create and maintain cross-platform apps efficiently. Their expertise includes Kotlin language proficiency, understanding of platform-specific APIs, and experience with integrating shared and native code. Freelance developers often manage multiple projects, collaborate remotely, and must stay updated with the latest Kotlin Multiplatform advancements.

What are some common challenges faced by Freelance Kotlin Multiplatform Developers when working with multiple platforms simultaneously?

Freelance Kotlin Multiplatform Developers often encounter challenges related to maintaining consistent functionality and user experience across different platforms such as Android, iOS, and web. Each platform has unique APIs and lifecycle requirements, so adapting shared code while handling platform-specific logic can be complex. Additionally, keeping up with evolving tooling, libraries, and ensuring seamless integration with native code requires ongoing learning and collaboration with other developers or clients. Effective communication and strong project management skills are essential to meet client expectations and deliver high-quality, cross-platform solutions.
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Freelance Kotlin Multiplatform Developer jobs near you
Infographic showing various Freelance Kotlin Multiplatform Developer job openings in the United States as of June 2026, with employment types broken down into 100% Contract. Highlights an 100% In-person job distribution, with an average salary of $127,151 per year, or $61.1 per hour.

Mobile Android Engineer

Prolaio

Chicago, IL • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 4 days ago

Job description

Who Are We?
Prolaio believes that continuous learning and collaboration can make a significant difference in how heart care is administered. We are creating smarter ways to address heart disease and heart risks by uniting patients, care teams, and researchers on a secure, technology-enabled platform that drives clinical innovation and offers a path towards better patient outcomes.
This is precision cardiology, and we know it's within reach.
What Will You Do?
The Overview
We are seeking a talented and motivated Mobile Software Engineer/Android Developer to join our Engineering team. In this role, you will enhance our mobile application capabilities by developing, optimizing, and maintaining our mobile app that interfaces with medical devices to collect and upload data for further analysis. You will collaborate closely with backend engineers, data scientists, and product teams to build mobile solutions that are scalable and impactful. This role will report directly to the Lead Mobile Engineer. We would love to find someone in the Chicagoland area who can collaborate with the team in the office, but are also open to the right candidate in another location.
The Specifics
  • Mobile Development: Design, develop, and maintain mobile applications using Kotlin and related technologies.
  • Algorithm Integration: Collaborate with backend teams to integrate state-of-the-art algorithms into mobile applications and deliver great user experiences.
  • Optimize Performance: Optimize mobile app performance, ensuring efficiency, reusability, and responsiveness across a wide variety of mobile devices.
  • API Integration: Work with backend teams to integrate RESTful APIs that interface with the mobile app.
  • Testing and Automation: Write unit tests and UI automation tests using tools like Espresso, UI Automator, JUnit, and Appium.
  • Collaboration: Work closely with data scientists, product teams, and engineers to align data solutions with business and product needs.
  • Problem Solving: Tackle complex technical challenges and contribute to continuous improvement initiatives

Why Prolaio?
  • Impactful Work: You will join in the fight against heart failure (HF) and hypertrophic cardiomyopathy (HCM) with the goal of extending and saving the lives of our patients while also being at the forefront of changing the healthcare industry through technology.
  • Innovative Environment: You will be part of an organization doing something that's never been done before.
  • Professional Growth: You will join a growing team and have a substantial impact on our daily and future operations with the opportunity to continuously learn and grow.
  • Collaborative Team: You will be part of a team of collaborative, curious, and committed individuals focused on the collective good, inclusiveness, scientific excellence, and advancing digital health for cardiology.

Who You Are?
  • Experience and Education
    • Bachelor's degree in Computer Science, Engineering, or a related technical field.
    • 3-5 years of experience as a Mobile Software Engineer, Android Engineer, or similar role.
  • Technical Skills and Practice
    • Mobile Development: Strong experience with Kotlin for Android development.
    • Mobile Architecture: Knowledge of mobile architecture patterns such as MVP, MVVM, or MVC.
    • Testing and Automation: Experience with unit testing and UI automation using tools like Espresso, UI Automator, JUnit, or Appium.
    • API Integration: Experience with integrating RESTful APIs into mobile applications.
    • Programming Skills: Proficiency in mobile frameworks and libraries such as Jetpack Compose, Firebase, and ktor.
    • Communication Skills: Strong problem-solving, communication, and collaboration abilities.
    • Remote Work Ability: Ability to work effectively in a distributed, remote-first environment.
    • Language Proficiency: Fluent in English.

Additional Qualifications (Nice to Haves)
  • Kotlin Multiplatform: Experience working on Kotlin Multiplatform projects for both Android and iOS.
  • BLE Devices: Experience with Bluetooth Low Energy (BLE) devices.
  • CI/CD Automation: Experience with mobile CI/CD processes.
  • Healthcare Experience: Previous experience in the healthcare industry

Why You'll Love Working Here
  • Meaningful Compensation: Competitive salary, performance bonus, and equity so you can share in what we build.
  • Great Health Coverage: Medical, dental, and vision plans with multiple options and strong company contributions.
  • Flexible Spending Perks: HSA, FSA, commuter benefits, and a $1,200 annual Lifestyle Spending Account to support wellness, commuting, family needs, and more.
  • Time to Recharge: Generous paid time off, sick leave, and company holidays.
  • Family-First Benefits: Paid parental leave, caregiver leave, and support for growing families.
  • Security & Peace of Mind: Company-paid life insurance and short- and long-term disability coverage.
  • Plan for the Future: 401(k) plan to help you build long-term financial security.
  • Care When You Need It: Easy access to telehealth and optional supplemental coverage for life's unexpected moments.

Starting Salary is at $139,000.00 (Exact Compensation may vary based on skills, experience, and location)

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