Senior Kotlin Engineer - Build Cross-Platform Apps & Lead

Avenue3; Leeds; On-site; GBP 60,000 - 100,000; Full time

Benefits offered by this job

Competitive salary

Company pension

Growth opportunities

Inclusive culture

Job summary

Avenue3 in Yorkshire is seeking a Senior Engineer who blends strong hands-on Kotlin skills with a customer-focused mindset to deliver high-quality software in complex, often high-latency environments. You will write Kotlin code, contribute to sound technical decisions and help clients move forward with confidence.

You’ll thrive in agile, multidisciplinary teams where requirements aren’t always fully defined, shaping pragmatic solutions and taking ownership of features from design to production.

Qualifications

• Experience delivering cross-platform applications using Kotlin Multiplatform.
• Ability to design-end-to-end features from conception to production.
• Strong collaboration with product owners, architects and clients.

Responsibilities

• Design, build and maintain robust cross-platform applications using Kotlin Multiplatform and Compose Multiplatform, owning features end-to-end from design through to production across Android and desktop (Windows/macOS/Linux) targets.
• Work across shared business logic and platform-specific implementations using Kotlin's expect/actual pattern, touching networking, local storage and device-integration layers.
• Build and ship applications that sync reliably in disconnected and high-latency environments, applying strong DevOps practices, CI/CD pipelines and Gradle-based build tooling.
• Deliver clean, well-tested, maintainable code, with appropriate automated testing across the SDLC.
• Investigate and resolve issues across the stack, including in production, with a calm, methodical approach.
• Mentor and support less experienced engineers through pairing, code review and day-to-day collaboration.
• Contribute to a culture of quality, curiosity and continuous improvement within the team.

Skills

Kotlin

Kotlin Multiplatform

Compose Multiplatform

Android

CI/CD

Gradle

Automated testing

DevOps practices

Tools

Gradle

CI/CD pipelines

Kotlin tooling

Job description

Avenue3 in Yorkshire is seeking a Senior Engineer who blends strong hands-on Kotlin skills with a customer-focused mindset to deliver high-quality software in complex, often high-latency environments. You will write Kotlin code, contribute to sound technical decisions and help clients move forward with confidence.

You’ll thrive in agile, multidisciplinary teams where requirements aren’t always fully defined, shaping pragmatic solutions and taking ownership of features from design to production.