Bjak
UX Engineer, HCI
About this role
A1 is building AI-native applications that bring intelligence to everyday tools like email and notes. You'll be a UX Engineer bridging design and engineering, creating novel interaction patterns for AI interfaces where conventions don't yet exist—focusing on making AI behavior understandable, controllable, and trustworthy in real workflows.
What you'll do
- Prototype and ship AI-native interfaces across web and mobile platforms
- Design and implement HCI patterns for streaming responses, multi-step tasks, and real-time feedback
- Build working prototypes that demonstrate progress, uncertainty, confidence, and recovery states
- Create interfaces enabling users to supervise, correct, and redirect AI behavior
- Collaborate with product, design, and ML teams to validate interaction concepts rapidly
- Develop frontend architecture and reusable components for AI-driven product surfaces
What they're looking for
- React and TypeScript
- Interaction-heavy and experimental UI development
- Animation, responsiveness, and frontend performance optimization
- Product and UX instincts for identifying usability gaps
- Rapid prototyping in ambiguous, under-specified environments
- State management in AI-driven interfaces
- HCI design for trust, control, transparency, and error recovery
- Design-engineering collaboration without formal handoffs
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Bjak
Bjak is a Southeast Asian fintech super app offering insurance, payments, savings, wallets, and investment products through a unified platform. The company is hiring full stack engineers, backend engineers, iOS developers, and Android engineers to build scalable features and reliable systems across mobile and web products.
- Website
- bjak.com
Likely interview questions
- Walk us through a time you built an experimental or interaction-heavy interface—what made it challenging and how did you validate it with users?
- How would you design an interface to show an AI system's confidence level or uncertainty to a user in a way that builds trust?