Senior iOS Engineer

LemFi; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading financial app developer is seeking a Senior iOS Engineer to enhance mobile experiences relied upon by users globally. You will develop high-performance apps, collaborate with cross-functional teams and ensure code quality and user satisfaction. The ideal candidate has deep experience with Swift and is committed to delivering intuitive and secure applications. Join a mission-driven company that aims to create financial inclusivity and opportunity across borders.

Qualifications

• Deep experience building iOS apps with Swift and familiarity with SwiftUI.
• Knowledge of iOS frameworks, architecture patterns (e.g., MVVM, Clean Architecture).
• Understanding of iOS security, encryption, and secure storage.

Responsibilities

• Develop scalable, secure, and maintainable iOS applications using Swift.
• Collaborate with Design and Product to implement intuitive interfaces.
• Write clean, testable code, participate in code reviews.

Skills

User-Focused

Strong Swift fundamentals

Collaborative

Ownership-Driven

Continuous Learner

Tools

Swift

SwiftUI

RESTful APIs

XCTest

Job description

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LemFi (Series B) is building the go-to financial app for the Global South.

Moving to a new country shouldn't mean starting from zero. That's why our team of 400+ spanning 20+ countries is building a financial ecosystem that helps immigrants stay connected to home, build stability, and create wealth regardless of where they are from or where they live.

What began as fast, affordable remittances is now evolving into a complete platform for multi-currency accounts, payments, credit, and long-term financial growth.

With over 2 million users across the globe, we process over $1.5B in monthly transactions to 30+ countries, proving that borders shouldn't limit financial opportunity.

The Role

As a Senior iOS Engineer, you will build and evolve the mobile experiences relied on by customers across the world. You will design and deliver high-performance, intuitive, and secure applications that drive trust and engagement at scale.

This is a hands-on, high-impact role. You will collaborate with Product, Design, and Backend teams to ship polished user experiences, improve performance and reliability, and contribute to the architectural direction of the iOS stack.

How You'll Contribute

• Build High-Quality Apps: Develop scalable, secure, and maintainable iOS applications using Swift.
• Deliver Exceptional UX: Collaborate with Design and Product to implement intuitive, performant, and visually polished interfaces.
• Ensure Code Quality: Write clean, testable code, participate in code reviews, and maintain strong engineering standards.
• Optimise Performance: Debug, profile, and continuously improve app speed, reliability, and responsiveness.
• Support Team Growth: Mentor junior engineers and share best practices across the mobile team.

Who You Are

• User-Focused: You care deeply about delivering smooth, intuitive experiences.
• Technically Excellent: You bring strong Swift fundamentals and hands-on iOS expertise.
• Collaborative: You work effectively across Product, Design, and Engineering.
• Ownership-Driven: You take responsibility from design to release.
• Continuous Learner: You stay current with iOS frameworks, patterns, and emerging techniques.

What You'll Bring

• Deep experience building iOS apps with Swift and familiarity with SwiftUI.
• Knowledge of iOS frameworks, architecture patterns (e.g., MVVM, Clean Architecture).
• Experience integrating RESTful APIs and working with backend teams.
• Understanding of iOS security, encryption, and secure storage.
• Experience with UI testing (e.g., XCTest).
• Strong UI/UX sensibility and attention to detail.

The Interview Process

1. Chat with a Talent Partner (30 mins)
2. Behaviours & Culture (30 mins)
3. Take home assignment (2 hours), Paired Programming (60 mins)
4. System Design (30 mins)

#LI-JR1

Why Join LemFi?

Love shouldn't be expensive, yet those working hardest for their families often face predatory fees and banking exclusion. We're changing this.

At LemFi, you won't be just a cog in a machine. Whether designing products, scaling operations, or telling our story, you'll tackle complex challenges with real, immediate impact. Your work goes beyond metrics - it puts money back in families' pockets and offers access to the previously excluded. Join us to make a meaningful difference, where high performance is a lifeline for millions.

Our Values: How We Win

• Sharp Customer Focus We cut through the noise and prioritize ruthlessly based on what drives real value.
• Lead with Data We trade instinct for insight. We test, analyze, and own the outcomes.
• Ownership We take responsibility for global outcomes, not just local wins.
• Grit We navigate ambiguity with resilience and keep pushing until the customer feels the impact.

You can connect with us on LinkedIn and Instagram and if you haven't already, download the app on the App Store or Google Play.

Diversity & Inclusion at LemFi

To build the best financial tools for the global diaspora, we need a team that reflects the world we serve. We welcome builders from all walks of life who embody our values over a perfect resume.

Don't meet every single requirement in the job ad? Research shows that candidates from underrepresented backgrounds often hesitate to apply if they don't check every box. If you are excited about this role and our mission, we encourage you to apply anyway. You might be just the right person for this, or other roles.