Senior Kotlin MPF Developer (4-Month Contract | Remote) | Puerto Rico

10Folders; San Juan (PR); Remote; USD 80,000 - 120,000; Full time

Job summary

An innovative firm is seeking a Senior or Strong Semi-Senior Kotlin Multiplatform Developer for a 4-month remote contract. This exciting role involves designing and implementing a brand-new SDK for an automotive product, targeting both Android and iOS platforms. You'll work with a compact, cross-functional team, contributing to high-quality SDKs that developers love. If you're passionate about Kotlin Multiplatform and enjoy clean architecture, this opportunity offers competitive compensation and the chance to tackle interesting technological challenges. Join us and make a significant impact in a collaborative environment!

Qualifications

• Proven experience in Kotlin Multiplatform for real-world applications.
• Strong background in Android or iOS development, or both.

Responsibilities

• Design and implement a production-grade SDK using Kotlin Multiplatform.
• Collaborate with a remote team to build core SDK functionality.

Skills

Kotlin Multiplatform

Android Development

iOS Development

Debugging Skills

Clean Code Practices

Communication Skills

Tools

Gradle

Xcode

Job description

Senior or Strong Semi-Senior Kotlin Multiplatform Developer (4-Month Contract | Fully Remote)

Are you a Senior or Strong Semi-Senior Kotlin Multiplatform Developer with solid experience in Android and/or iOS development — and excited to build something from scratch?
Join a focused, high-impact 4-month contract project, where you'll help develop a brand-new SDK for an innovative automotive product ️

This position is 100% remote.

What You’ll Do

Design and implement a production-grade SDK using Kotlin Multiplatform (KMP)
Target both Android and iOS, collaborating with a small, remote team of mobile experts
Build core SDK functionality from the ground up
Write clean, maintainable, and testable code — performance and quality are key
Optionally contribute to CI/CD, release workflows, and SDK documentation (bonus points! )

What You Bring

Proven experience with Kotlin Multiplatform in real-world applications
Strong Android or iOS development background (or both!)
Solid debugging and architecture skills — you know when to abstract and when to get things done
Passion for building high-quality SDKs that developers love to use
Comfortable communicating in English — both written and verbal

Bonus Skills

Experience building SDKs intended for external developer use
Familiarity with mobile CI/CD pipelines, testing tools, and versioning practices
Understanding of native build systems like Gradle and Xcode
Exposure to automotive technologies (e.g., Bluetooth, CAN bus, sensors)

Who You’ll Work With

You’ll join a compact, cross-functional team consisting of:
3 Developers (covering KMP, Android, and iOS)
1 Project Manager
1 Software Architect
A collaborative and agile setup — with fast feedback loops and direct impact.

Our hybrid-friendly company has offices in:
Mexico (Querétaro & Tepatitlán)
Bolivia (Cochabamba)
Uruguay (Montevideo)
Argentina (Tandil & Resistencia)

What We Offer

Competitive compensation and an interesting technological challenge
4-month freelance or contractor agreement

If you're a Kotlin Multiplatform enthusiast with mobile chops and a love for clean SDK architecture — we'd love to hear from you!

Sound like you? Let’s talk!