Senior Mobile Software Engineer - FinTech (Fully Remote)

InterAct Consulting; London; Remote; GBP 80,000; Full time

Job summary

A leading fintech company is seeking a Senior Mobile Software Engineer to join their remote team. In this role, you will be responsible for developing mobile applications, mentoring junior engineers, and influencing product innovation. The position offers a competitive salary of up to £80,000 and a supportive work environment with a focus on continuous learning.

Benefits

12.5% annual bonus

10% employer pension contribution

30 days holiday per year

Supportive, collaborative work environment

Qualifications

• Proven experience building and maintaining mobile applications on Android and iOS.
• Expertise in Kotlin and Swift development.
• Strong understanding of mobile application architecture and design patterns.

Responsibilities

• Develop and maintain high-quality mobile applications for Android and iOS.
• Own the full application development life cycle.
• Collaborate with teams to define, design, and ship new features.

Skills

Developing mobile applications

Kotlin

Swift

Test-driven development

Problem-solving

Job description

Senior Mobile Software Engineer - FinTech (Fully Remote)

Employer InterAct Consulting Location London, United Kingdom Salary Competitive Salary Closing date 25 Jun 2025

View more categories View less categories Sector Technology ,Professional Services Responsibilities Information Technology Position/Level Senior Management Contract Type Permanent

Senior Mobile Software Engineer - FinTech (Fully Remote, 1 Day/Month in London)

Location: Fully Remote (UK-based), with 1 day per month in our London office (travel at own expense)
Salary: Up to £80,000 per annum
Bonus: 12.5% of salary per year
Pension: 10% employer contribution
Holiday: 30 days per annum

About the Role

We are a dynamic fintech company looking for an experienced Senior Mobile Software Engineer to join our growing team. You'll have the opportunity to shape the future of our mobile products, working on innovative solutions that empower our customers and drive business success.

This is a fully remote position, with just one day per month required in our London office (travel to be arranged and paid by the individual). You'll collaborate with talented engineers, product managers, and designers to deliver world-class mobile experiences.

Key Responsibilities

• Develop and maintain high-quality mobile applications for both Android and iOS platforms.
• Own the full application development life cycle, from architecture to deployment and beyond.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Ensure code quality through rigorous code reviews, test-driven development (TDD), and robust CI/CD practices.
• Mentor junior engineers and contribute to a culture of continuous learning and improvement.
• Stay up-to-date with emerging technologies and industry best practices.

Essential Skills & Experience

• Proven experience building and maintaining mobile applications on both Android and iOS.
• Expertise in Kotlin (Android) and Swift (iOS) development.
• Strong understanding of native mobile application architecture and design patterns.
• Experience with test-driven development (TDD) and automated testing frameworks.
• Familiarity with agile methodologies and collaborative development tools (eg, Git, JIRA).
• Ability to work independently and as part of a distributed team.
• Excellent problem-solving skills and attention to detail.

Desirable Skills

• Experience with cross-platform frameworks (eg, React Native, Flutter) is a plus.
• Knowledge of modern mobile security best practices.
• Experience mentoring or leading engineering teams.

Benefits

• Competitive salary up to £80,000 per annum
• 12.5% annual bonus
• 10% employer pension contribution
• 30 days holiday per year
• Supportive, collaborative work environment
• Opportunity to work on innovative fintech products

How to Apply

If you're passionate about mobile development and want to make a real impact in fintech, we'd love to hear from you! Please send your CV and a brief cover letter outlining your relevant experience.

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