Lead Kotlin Multiplatform Developer

N-iX is a global software solutions and engineering services company that helps leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology.

N-iX

Employee count: 1001-5000

Spain only

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N-iX is a global software development service company that helps businesses create next-generation software products. Join N-iX and become part of a team where your ideas make a real impact.

Requirements

7+ years of experience in mobile app development, with at least 3 years in Kotlin Multiplatform (KMP)
Experience in high-level product estimation and roadmap development
Proven record of delivering production-grade mobile applications for both iOS and Android using KMP
Deep understanding of Kotlin (coroutines, flows, multiplatform libraries, shared data models, serialization)
Expertise in Android (Jetpack Compose) and iOS (Swift/SwiftUI) with a strong grasp of platform internals and performance tuning
Experience with device-to-device communication protocols, especially Bluetooth/BLE
Strong architectural mindset — experienced in designing scalable, testable, modular architectures
Proficiency with Ktor Client, SQLDelight, or similar for data and networking layers
Experience in offline-first architectures, synchronization logic, and push notifications
Hands-on experience building CI/CD pipelines (GitHub Actions, Bitrise, Fastlane, Jenkins) and managing app releases (Play Store, App Store)
Solid understanding of security, performance, and offline-first mobile patterns
Demonstrated ability to lead teams, perform technical reviews, and mentor developers
Excellent communication and collaboration skills; comfortable working with international teams
Knowledge of observability stacks (Crashlytics, Firebase, Sentry)
Professional fluency in English
Available for business trips to the customer side

Benefits

Flexible working format - remote, office-based or flexible
A competitive salary and good compensation package
Personalized career growth
Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
Active tech communities with regular knowledge sharing
Education reimbursement
Memorable anniversary presents
Corporate events and team buildings

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About the job

Apply before

Jan 05, 2026

Posted on

Nov 06, 2025

Job type

Full Time

Experience level

Senior

Manager

Location requirements

Spain

Hiring timezones

Spain +/- 0 hours

About N-iX

Learn more about N-iX and their company culture.

View company profile

N-iX is a global software solutions and engineering services company that empowers the world's leading organizations to transform challenges into lasting business value. For our customers, navigating the complexities of the digital landscape to achieve operational efficiency and revenue growth is a constant priority. That's why we focus on delivering tangible outcomes through advanced technology. We understand that businesses in sectors like finance, manufacturing, supply chain, retail, and healthcare face unique hurdles. Whether it's modernizing legacy systems, harnessing the power of data, or building innovative products from the ground up, our clients trust us to provide the expertise needed to succeed. We act as a strategic partner, helping them not just to solve immediate tech problems but to build a foundation for future growth and innovation.

Our approach is rooted in a deep understanding of our clients' industries and business objectives. We don't just write code; we co-create solutions that drive real-world impact. For over two decades, we have been the trusted partner for numerous tech companies, Fortune 500 leaders, and enterprises of all sizes. This long-standing experience allows us to anticipate market shifts and proactively develop expertise in emerging areas like cloud computing, data analytics, AI/ML, IoT, and cybersecurity. Our Technology Office, a dedicated consulting unit, provides strategic guidance to ensure our clients are not just keeping up with technology trends, but are leveraging them for a competitive advantage. By building strong, collaborative relationships and fostering a culture of ownership and innovation, we ensure that every project we undertake is treated as our own, delivering maximum value and driving our clients' success.

Tech stack

Learn about the tools and technologies that N-iX uses to build, market, and sell its products.

View tech stack

.NET

Unity

JavaScript

Python

Java

PHP

Ruby

Swift

Scala

4 more

N-iX employees can create an account to update this tech stack.

Employee benefits

Learn about the employee benefits and perks provided at N-iX.

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Paid vacations

Enjoy flexible hours and vacations.

Life insurance

N-iX offers life insurance to its employees.

Medical Insurance

N-iX provides medical insurance for its employees.

Training budget

We fully compensate the costs you spend on certifications.

View N-iX's employee benefits

Apply now

Please let N-iX know you found this job on Himalayas. This helps us grow!

Apply now