Mobile UI Designer

Shaping mobile experiences for millions

BJAK, a London-based fintech, is looking for a Mobile UI Designer to join its UK team and help craft the next wave of mobile money experiences. The role focuses on elegant, high-performing interfaces for BJAK's AI Neobank and other financial products, and it works in a hybrid setup with colleagues in engineering and product management to ship features used by millions every day.

The company started in 2019 with a mobile-first insurance platform that became a regional leader in Southeast Asia. Today BJAK is expanding into spending, saving, investing, exchanging and travel services, aiming to help people get more from their money on daily basis. Its teams span multiple countries, with more than 20 nationalities collaborating across offices and remote setups, and it seeks people who bring real passion to building great products rather than clock-watching.

This position suits someone who cares about mobile interfaces that are effortless to use, visually refined and responsive. You’ll partner with engineers and product managers to design experiences that millions rely on every day.

What you’ll own as you craft the experience

You’ll design interfaces for both iOS and Android that feel polished and intuitive, building from wireframes and flows through prototypes to production-ready UI. The work spans insurance, payments, claims, investments and broader financial services, all while maintaining a consistent design language across the product line. You’ll help build and sustain a mobile design system with reusable components and collaborate closely with developers to ensure pixel-perfect implementation. Usability, accessibility and adherence to platform guidelines will be part of the daily focus, and you’ll iterate based on analytics, usability findings and product feedback to keep the experience coherent across devices and operating systems.

Must-haves

• At least two years of hands-on experience designing mobile applications.
• A strong portfolio that showcases high-quality mobile UI work.
• Proficiency with Figma and interactive prototyping.
• Solid understanding of the iOS Human Interface Guidelines and Android Material Design.
• Good grasp of mobile usability, responsive layouts and interaction design.
• Top-notch attention to typography, spacing, colour and visual hierarchy.
• Ability to translate complex financial workflows into clean, approachable mobile experiences.
• A portfolio is required.

Nice-to-haves

• Experience designing across a range of financial services, including insurance, payments and investments.
• Familiarity with design systems and building reusable components beyond a single product.
• Experience working with FigJam for collaborative workshops and brainstorming sessions.
• Knowledge of Auto Layout and advanced interactive prototyping to demonstrate nuanced interactions.

Tips for applicants

Lead with a fintech-focused mobile case study in your portfolio, especially one that shows end-to-end thinking across iOS and Android and demonstrates a clear, user-friendly financial flow.

When you describe your must-have skills, point to a specific project where you simplified a complex financial workflow into a clean mobile experience, and show the exact design assets, prototypes and any accessibility considerations you applied.

In interviews, be ready to explain the rationale behind your decisions, including how you balanced platform guidelines, usability and visual polish, and how you collaborated with engineers to achieve pixel-perfect results.

Ask a focused question about the design system at BJAK, for example how components are shared across products and devices, and how feedback from analytics informs ongoing refinements.