Product Designer (UX), HCI

📍 Job Overview

Job Title: Product Designer (UX), HCI

Company: Bjak

Location: Seoul, South Korea

Job Type: Full-time

Category: Product Design / UX Design

Date Posted: August 22, 2026

Experience Level: Mid-level (2-5 years)

Remote Status: Hybrid

🚀 Role Summary

• Design and develop end-to-end user experiences for innovative AI-native product surfaces, with a strong focus on human-AI interaction models.

• Create intuitive and controllable interaction patterns for complex, multi-step AI workflows, including prompting, review, correction, and recovery mechanisms.

• Collaborate closely with cross-functional teams, including Product Managers, Engineers, and Machine Learning specialists, to conceptualize, iterate, and deliver user-centric AI solutions.

• Define and evolve new interaction paradigms for proactive AI assistants, ensuring users understand AI capabilities, limitations, and progress.

📝 Enhancement Note: The role emphasizes designing for "AI-native" applications, indicating a focus on deeply integrated AI functionalities rather than add-on features. This requires a designer who can think about AI as a core component of the user experience, not just a tool. The mention of "proactive smart assistant" and "minimal prompting" suggests a design challenge in anticipating user needs and designing for implicit interaction.

📈 Primary Responsibilities

• Conceptualize, design, and iterate on end-to-end user experiences for AI product surfaces, from initial ideation through to shipped product.

• Develop innovative interaction patterns for human-AI workflows, encompassing prompt engineering interfaces, progress review, confirmation dialogues, error correction mechanisms, and task handoff protocols.

• Design user interfaces that provide transparency into the AI's current state, including its understanding, uncertainties, and predicted next actions.

• Translate complex, multi-step AI capabilities into clear, controllable, and user-friendly flows suitable for everyday use.

• Partner with Product Managers, Engineers, and Machine Learning teams to define problem statements, validate design concepts, and ensure rapid, iterative development cycles.

• Produce a range of design artifacts, including wireframes, user flows, interactive prototypes, and high-fidelity visual designs for both web and mobile platforms.

• Conduct lightweight user research and usability testing to identify user friction points, build trust issues, and pinpoint potential failure modes within AI interactions.

• Contribute to the definition and establishment of reusable HCI design patterns as the product and its design system mature.

📝 Enhancement Note: The responsibilities highlight a significant focus on the "how" of AI interaction. This includes not just the visual design but the underlying logic of how a user interacts with a system that reasons and acts. The emphasis on "transparency," "control," and "recovery" points to a need for designers who can build trust in AI systems that might otherwise feel opaque or unpredictable.

🎓 Skills & Qualifications

Education: While not explicitly stated, a Bachelor's or Master's degree in Human-Computer Interaction (HCI), Interaction Design, Graphic Design, Computer Science, or a related field is typically expected for this level of role.

Experience: 2-5 years of professional experience in Product Design or UX Design, with a demonstrated track record of designing for web or mobile products.

Required Skills:

• Proven experience as a Product Designer or UX Designer with a strong portfolio showcasing successful web or mobile product designs.

• Expertise in interaction design principles, information hierarchy, and creating functional prototypes.

• High proficiency in Figma and experience with rapid iteration workflows.

• Demonstrated ability to simplify complex systems and translate ambiguous product behavior into clear, user-friendly experiences.

• Experience collaborating effectively with Product Managers and Engineers in fast-paced, agile team environments.

• Comfort and adaptability in working with ambiguity and shaping solutions when requirements are not fully defined.

• Strong judgment regarding usability, edge cases, and robust failure handling strategies.

• Clear understanding and articulation of concepts related to trust, control, feedback, and transparency in AI-driven user experiences. Preferred Skills:

• Experience designing for AI-powered products or systems.

• Familiarity with HCI research methodologies and conducting user research/usability testing.

• Knowledge of design system development and maintenance.

• Experience with multi-step reasoning and complex workflow design.

• Understanding of Machine Learning concepts and their implications for UX.

📝 Enhancement Note: The experience requirement is framed as "2-5 years," suggesting a mid-level role where the candidate is expected to contribute independently but may still benefit from mentorship. The emphasis on "ambiguity" and "shaping solutions before requirements are fully defined" is critical for AI product development, where the technology is rapidly evolving.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A curated selection of case studies demonstrating end-to-end product design processes for web and/or mobile applications.

• Specific examples that highlight your ability to design for complex systems and AI-driven interactions.

• Projects showcasing your expertise in interaction design, information hierarchy, and wireframing through to high-fidelity mockups.

• Prototypes that effectively communicate user flows, interaction patterns, and the overall user experience.

• Evidence of your ability to simplify complex problems and present clear, actionable solutions. Process Documentation:

• For each case study, clearly outline the problem statement, your role, the design process followed, key decisions made, and the impact of your design solutions.

• Detail your approach to user research, usability testing, and how you incorporated feedback into iterative design improvements.

• Showcase your collaboration with engineering and product teams, illustrating how you translated user needs and business requirements into tangible product features.

• Demonstrate your understanding of AI interaction principles and how you applied them to build trust, control, and transparency in user interfaces.

📝 Enhancement Note: Given the role's focus on AI and complex interactions, the portfolio should ideally include case studies that explicitly address challenges related to AI understanding, control, and user trust. The ability to articulate the "why" behind design decisions, especially in ambiguous AI contexts, will be paramount.

💵 Compensation & Benefits

Salary Range: Based on the role's mid-level experience requirement (2-5 years), location in Seoul, South Korea, and the specialized nature of AI/HCI design, a competitive salary range would be estimated between ₩60,000,000 to ₩90,000,000 KRW per year. This range reflects industry standards for experienced UX designers in a major tech hub, considering the company's focus on cutting-edge AI technology.

Benefits:

• Competitive salary and potential for performance-based bonuses.

• Comprehensive health insurance coverage (medical, dental, vision).

• Paid time off, including vacation days, sick leave, and public holidays.

• Professional development opportunities, including access to training, conferences, and workshops.

• Opportunities for career growth within a rapidly evolving AI product space.

• Potential for stock options or equity, depending on company policy.

• Hybrid work arrangement offering flexibility between remote work and in-office collaboration.

Working Hours: Standard full-time working hours are typically 40 hours per week. The hybrid work arrangement allows for flexibility in scheduling, with an expectation of core hours for team collaboration.

📝 Enhancement Note: Salary estimates are based on general market data for mid-level Product/UX Designers in Seoul, South Korea, adjusted for the specialized AI/HCI focus. Specific benefits will vary and should be confirmed directly with the employer. The hybrid nature of the role suggests a need for excellent time management and communication skills.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology, Software, Artificial Intelligence. Bjak is operating in the rapidly advancing field of AI, aiming to integrate AI capabilities into everyday applications to enhance user efficiency and experience. The company is focused on building "AI-native" products that go beyond traditional software functionalities.

Company Size: The description mentions "small, world-class teams" and "high talent density," suggesting a startup or a lean, agile organization, likely in the Seed to Series B funding stage. This implies a dynamic environment where individual contributions have a significant impact.

Founded: The founding date is not provided, but the mission to build AI-native applications for billions suggests a forward-thinking company focused on future technology trends.

Team Structure:

• The Product Design team is likely small and highly collaborative, working in close proximity with Product Management and Engineering.

• Reporting structure is expected to be relatively flat, with designers reporting to a Head of Design or a Lead Product Manager.

• Cross-functional collaboration is a core tenet, with designers deeply integrated into product development cycles alongside ML engineers and product managers. Methodology:

• Data-driven decision-making, leveraging user research and product analytics to inform design choices.

• Agile and iterative development processes, emphasizing rapid prototyping, testing, and deployment.

• A strong focus on building reliable, high-quality AI systems capable of complex reasoning and real-world task completion.

• Emphasis on creating user experiences that foster trust and control in AI interactions.

Company Website: https://bjak.my/en/about-us

📝 Enhancement Note: The company culture is described as "high talent density" and "hands-on," indicating an environment that values expertise, autonomy, and direct contribution. The emphasis on collective decision-making and rapid speed suggests a dynamic, startup-like atmosphere where individuals are expected to be proactive and self-directed.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a mid-level Product Designer (UX/HCI) with 2-5 years of experience. It signifies a step beyond junior roles, requiring independent contribution, problem-solving, and the ability to drive design initiatives within a specific product area. The designer is expected to take ownership of significant parts of the user experience.

Reporting Structure: The designer will likely report to a Design Lead, Head of Design, or a Senior Product Manager. They will work closely with Product Managers and Engineers on a day-to-day basis, forming a core product triad.

Operations Impact: The impact is substantial, as the designer will be instrumental in shaping how users interact with cutting-edge AI technology. Their work will directly influence user adoption, engagement, and trust in AI-native products, ultimately contributing to the company's mission of making AI accessible and beneficial to billions.

Growth Opportunities:

• Specialization: Develop deep expertise in Human-AI Interaction (HCI) and AI-native product design, becoming a go-to expert in this emerging field.

• Leadership: Progress to a Senior Product Designer role, leading design initiatives for larger product areas, mentoring junior designers, and contributing to the evolution of the design system.

• Product Strategy: Influence product strategy by identifying new opportunities for AI integration and designing innovative user experiences that solve complex user problems.

• Cross-functional Leadership: Take on more responsibility in bridging the gap between design, engineering, and ML teams, potentially leading cross-functional design thinking workshops.

📝 Enhancement Note: The growth opportunities are strongly tied to the nascent field of AI product design. This role offers a chance to be at the forefront of defining new UX paradigms, which can lead to significant career advancement and specialization in a high-demand area.

🌐 Work Environment

Office Type: The role is described as "Hybrid," indicating a blend of remote work and in-office presence. This suggests a modern work environment that values flexibility while also recognizing the importance of in-person collaboration for certain activities.

Office Location(s): The primary location is Seoul, South Korea. Specific office details, such as amenities or accessibility, are not provided but can be expected to be typical of a tech company in a major metropolitan area.

Workspace Context:

• Collaborative open-plan office spaces designed to foster interaction and knowledge sharing among teams.

• Access to modern design tools and technology, including high-performance workstations and relevant software.

• Opportunities for informal and formal collaboration sessions with product, engineering, and ML teams, facilitating rapid problem-solving and ideation.

• A culture that encourages experimentation and learning, allowing designers to explore new approaches to AI interaction.

Work Schedule: Standard full-time, with flexibility offered through the hybrid model. Core working hours will likely be established to ensure team alignment and collaboration, with the remaining hours manageable through remote work.

📝 Enhancement Note: The hybrid work model is a key aspect of the work environment, requiring strong self-management skills and effective communication strategies to maintain productivity and team cohesion across different work settings.

📄 Application & Portfolio Review Process

Interview Process:

• Application Submission: Submit your resume and a portfolio showcasing relevant UX/Product Design work. The portfolio is critical for this role.

• Initial Screening: Applications and portfolios will be reviewed by the design team for alignment with the role's requirements.

• Round 1 Interview: Typically a 1-on-1 conversation with a hiring manager or senior designer to assess your experience, design philosophy, and cultural fit.

• Design Assessment: A take-home design challenge or an in-person/virtual whiteboard session to evaluate your problem-solving skills, interaction design thinking, and ability to articulate your design process. This will likely focus on AI interaction scenarios.

• Round 2 Interview: A broader interview, potentially with multiple team members (e.g., Product Manager, Engineer, another Designer), to delve deeper into your collaboration style, technical understanding, and strategic thinking.

• Final Decision: A prompt decision is expected after the final round.

Portfolio Review Tips:

• Focus on AI & Complexity: Highlight projects where you tackled complex systems or designed for AI-driven experiences. Clearly articulate the challenges and your unique solutions.

• Process Over Polish: While polished visuals are good, emphasize your design process, problem-solving approach, research methodologies, and iterative improvements. Show your thinking.

• Storytelling: Frame your case studies as narratives. What was the problem? Who was the user? What was your solution? What was the impact? Quantify results where possible.

• Interaction Design Clarity: For AI roles, showcase how you designed for clarity, control, and trust. Use prototypes or detailed flow diagrams to illustrate complex interactions.

• Conciseness: Be prepared to walk through your portfolio efficiently. Select 3-4 strong, relevant projects.

Challenge Preparation:

• AI Interaction Scenarios: Practice designing solutions for hypothetical AI-related user problems, focusing on prompt design, AI feedback, error handling, and transparency.

• System Thinking: Be ready to discuss how you'd approach designing for a system with multiple steps and potential AI failures.

• Whiteboarding: Practice sketching user flows and interaction models quickly and clearly on a whiteboard or digital equivalent.

• Communication: Articulate your design decisions and rationale clearly and concisely, anticipating questions about trade-offs and alternative solutions.

📝 Enhancement Note: The interview process emphasizes a portfolio review and a design assessment, typical for design roles. For this specific role, the assessment will likely heavily weigh your ability to conceptualize and design for AI interactions, which is a relatively new and evolving field.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: Essential for wireframing, prototyping, UI design, and collaboration. Proficiency is a must.

• Prototyping Tools: Beyond Figma, familiarity with tools like Principle, ProtoPie, or similar for more advanced interactive prototypes may be beneficial.

• User Research Platforms: Tools like UserTesting.com, Maze, or internal tools for conducting usability tests and gathering user feedback.

Analytics & Reporting:

• Product Analytics Tools: Familiarity with tools like Amplitude, Mixpanel, or Google Analytics to understand user behavior and measure the impact of design changes.

• A/B Testing Platforms: Understanding how to design for and interpret results from A/B tests to optimize user experiences.

CRM & Automation: While not directly a designer's tool, understanding the underlying systems that leverage user data and automate workflows can be beneficial for designing seamless integrations and experiences.

📝 Enhancement Note: Figma is explicitly mentioned as a required skill, highlighting its central role in the design workflow. The emphasis on user research and analytics tools underscores the data-driven nature of the design process at Bjak.

👥 Team Culture & Values

Operations Values:

• User-Centricity: Deep commitment to understanding and solving user problems through intuitive and effective design.

• Innovation: A drive to explore new frontiers in AI and human-computer interaction, pushing the boundaries of what's possible.

• Collaboration: Valuing teamwork and open communication across disciplines to achieve shared goals.

• Excellence: Striving for high-quality outcomes, attention to detail, and continuous improvement in both product and process.

• Impact: A focus on creating products that deliver tangible benefits and improve the lives of billions of users.

Collaboration Style:

• Cross-functional Integration: Designers are embedded within product teams, working closely with PMs and Engineers on a daily basis.

• Open Feedback Culture: Encouraging constructive feedback on designs and processes to foster continuous learning and improvement.

• Agile & Iterative: A fast-paced environment that embraces rapid iteration, experimentation, and learning from both successes and failures.

• Knowledge Sharing: A culture that promotes sharing insights, best practices, and learnings across the team.

📝 Enhancement Note: The company values are strongly aligned with a forward-thinking technology company focused on innovation and impact. The collaborative style emphasizes integration and open communication, crucial for complex product development involving AI.

⚡ Challenges & Growth Opportunities

Challenges:

• Defining Novel Interactions: Designing for AI-native products requires creating entirely new interaction patterns that users haven't encountered before, demanding significant creativity and user empathy.

• Managing AI Ambiguity: AI systems can be unpredictable. Designers must create interfaces that manage this ambiguity, build user trust, and allow for effective error recovery.

• Rapidly Evolving Technology: The AI landscape changes quickly, requiring designers to stay abreast of new developments and adapt their approaches accordingly.

• Balancing Complexity and Simplicity: Translating complex AI capabilities into simple, usable interfaces is a constant design challenge.

Learning & Development Opportunities:

• AI/HCI Specialization: Gain deep expertise in a cutting-edge field that is rapidly shaping the future of technology.

• Industry Conferences: Opportunities to attend relevant AI and UX conferences to stay updated on trends and network with peers.

• Mentorship: Access to experienced designers and product leaders who can provide guidance and support for career growth.

• Skill Expansion: Development in areas like prompt engineering, AI ethics in design, and advanced prototyping for AI interactions.

📝 Enhancement Note: The challenges are directly related to the innovative nature of the role. Overcoming these challenges presents significant opportunities for professional growth and specialization in a highly sought-after domain.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to design for a system with significant ambiguity or unpredictable behavior. How did you approach it?" (Focus on your process for managing uncertainty, building trust, and error handling.)

• "How would you design an interface that helps users understand what an AI is thinking, especially when it makes a mistake?" (Prepare to discuss transparency, feedback loops, and correction mechanisms.)

• "Imagine we're building a proactive AI assistant. What are the key interaction design challenges you foresee, and how would you begin to address them?" (Think about context awareness, user control, and implicit vs. explicit interaction.) Company & Culture Questions:

• "What excites you about Bjak's mission to build AI-native applications?" (Research the company's vision and articulate your alignment.)

• "How do you approach collaboration with engineers and product managers, especially when design requirements are evolving rapidly?" (Highlight your communication and teamwork skills.)

• "What are your thoughts on building trust in AI systems, and how would that influence your design decisions?" (Showcase your understanding of AI ethics and user psychology.) Portfolio Presentation Strategy:

• Structure for AI: For each case study, clearly articulate the AI-specific challenges and how your design addressed them.

• Show, Don't Just Tell: Use prototypes and detailed flow diagrams to illustrate complex AI interactions.

• Quantify Impact: Where possible, present metrics that demonstrate the success of your designs, especially in terms of user efficiency or task completion.

• Focus on Process: Explain your iterative design process, how you incorporated feedback, and how you navigated ambiguity.

• Be Ready for Deep Dives: Prepare to answer detailed questions about your design decisions, trade-offs, and alternative approaches.

📝 Enhancement Note: Interview preparation should heavily lean into the AI aspect of the role. Candidates should be ready to discuss their understanding of HCI principles as applied to AI, their comfort with ambiguity, and their ability to translate complex AI functionalities into user-friendly experiences.

📌 Application Steps

To apply for this Product Designer (UX), HCI position:

• Submit your application through the provided link, ensuring you include your resume and a link to your online portfolio.

• Portfolio Customization: Tailor your portfolio to highlight projects demonstrating your experience with complex systems, interaction design, and ideally, AI-related challenges. Focus on case studies that showcase your problem-solving process and impact.

• Resume Optimization: Ensure your resume clearly states your years of experience, core UX/Product Design skills, proficiency in Figma, and any relevant experience with AI or HCI. Use keywords from the job description.

• Interview Preparation: Practice articulating your design process, especially for AI-interaction scenarios. Be ready to discuss your portfolio projects in detail and prepare for a potential design assessment.

• Company Research: Familiarize yourself with Bjak's mission and the broader landscape of AI-native applications to demonstrate your understanding and enthusiasm for their work.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.