Senior Android Developer - Fintech | Kotlin & AI-Driven Payments

Stratospherec Ltd; Fareham; On-site; GBP 60,000 - 70,000; Full time

Job summary

Stratospherec Ltd is seeking an experienced Senior Android / Mobile App Developer to join its growing fintech mobile team in Hampshire. You will develop and maintain Android apps using Kotlin, delivering high-quality features for real customers.

You’ll apply AI tools to improve workflows, collaborate with Product, UX/UI and Backend, and contribute to design decisions. The role emphasizes security, performance and a strong user experience, with a permanent contract.

Qualifications

• Commercial experience developing Android applications using Kotlin.
• Proven track record delivering mobile apps.
• Strong understanding of Android architecture and best practices.
• Experience integrating APIs and backend services.
• Familiarity with Agile development.
• Focus on quality, security and user experience.

Responsibilities

• Develop and maintain Android applications using Kotlin.
• Build secure, scalable and high-quality mobile payment features.
• Use AI tools and technologies within your software development workflow.
• Work with Product, UX/UI and Backend teams to deliver new features.
• Contribute to technical design and architectural decisions.
• Write clean, maintainable and well-tested code.
• Investigate and resolve technical issues.
• Identify opportunities to use AI to improve development processes and product capabilities.
• Contribute to the ongoing improvement of the mobile development environment.

Skills

Kotlin for Android

Android architecture

APIs & Backend services

Agile development

Version control (Git)

Testing / QA

AI-assisted development

Tools

Android Studio

Git

CI/CD pipelines

Job description

Stratospherec Ltd is seeking an experienced Senior Android / Mobile App Developer to join its growing fintech mobile team in Hampshire. You will develop and maintain Android apps using Kotlin, delivering high-quality features for real customers.

You’ll apply AI tools to improve workflows, collaborate with Product, UX/UI and Backend, and contribute to design decisions. The role emphasizes security, performance and a strong user experience, with a permanent contract.