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 / Human-Computer Interaction (HCI)

Date Posted: 2026-06-02

Experience Level: 2-5 Years (Mid-Level)

Remote Status: Hybrid (Remote with potential for onsite collaboration, specifically in Seoul, South Korea)

🚀 Role Summary

• Design cutting-edge user experiences for proactive AI-powered products, focusing on intuitive human-AI interaction models.

• Develop new interaction patterns for AI workflows, including prompting, review, confirmation, correction, and recovery mechanisms.

• Create clear and controllable interfaces that enhance user understanding of AI processes, uncertainties, and future actions.

• Collaborate closely with cross-functional teams (Product, Engineering, ML) to translate complex AI capabilities into user-friendly, everyday applications.

• Produce comprehensive design artifacts, including wireframes, flows, prototypes, and high-fidelity designs for both web and mobile platforms.

📝 Enhancement Note: While the job title is "Product Designer (UX), HCI," the core responsibilities and required skills strongly align with a specialized UX/Product Designer role focused on AI and Human-Computer Interaction. The "HCI" in the title indicates a deep dive into the theoretical and practical aspects of how humans interact with AI systems, moving beyond standard UX design. The "AI Assistant" context and emphasis on "proactive AI," "long-running workflows," and "real-world task completion" suggest this role is at the forefront of AI product development, requiring a designer who can conceptualize and build novel interaction paradigms.

📈 Primary Responsibilities

• Design end-to-end user experiences for AI product surfaces, from initial concept through to final product launch.

• Architect and iterate on interaction patterns for human-AI workflows, specifically addressing prompting, review, confirmation, correction, handoff, and error recovery.

• Develop user interfaces that provide users with transparency into AI operations: what the AI is doing, its knowledge base, its level of certainty, and anticipated next steps.

• Translate intricate, multi-step AI functionalities into user flows that are both clear and controllable for everyday application.

• Partner with product managers, engineers, and machine learning specialists to collaboratively define problems, test hypotheses, and accelerate product development cycles.

• Generate a range of design deliverables, including wireframes, user flows, interactive prototypes, and high-fidelity mockups for both web and mobile interfaces.

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

• Contribute to the establishment and refinement of reusable Human-Computer Interaction (HCI) design patterns as the product and design system mature.

📝 Enhancement Note: The responsibilities highlight a crucial need for a designer who can bridge the gap between advanced AI capabilities and user comprehension and control. The emphasis on "multi-step reasoning," "real-world task completion," and "persistent context" suggests the AI system is complex, requiring the designer to focus on clarity, trust, and manageability of these advanced AI functions. This role goes beyond typical UI design to encompass the strategic design of trust and control in AI interactions.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong foundation in design principles is expected, typically gained through a Bachelor's degree in HCI, Interaction Design, Graphic Design, Computer Science with a design focus, or equivalent practical experience.

Experience: 2-5 years of experience as a Product Designer or UX Designer, with a demonstrable portfolio showcasing successful web or mobile product launches.

Required Skills:

• Proven experience in interaction design, focusing on creating intuitive and engaging user journeys.

• Strong understanding of information hierarchy and its application in organizing complex data and functionalities.

• Expertise in prototyping tools and methodologies for rapid iteration and user testing.

• Proficiency in Figma, enabling efficient design creation and fast iteration workflows.

• Ability to distill complex systems and ambiguous product behaviors into clear, simplified user experiences.

• Experience collaborating effectively with product managers and engineers in fast-paced, agile environments.

• Comfort navigating ambiguity and proactively shaping solutions before requirements are fully defined.

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

• Clear conceptual thinking regarding trust, control, feedback mechanisms, and transparency in AI-driven experiences. Preferred Skills:

• Experience specifically designing for AI-powered products or complex interactive systems.

• Familiarity with Human-Computer Interaction (HCI) principles and research methodologies.

• Experience conducting and synthesizing user research and usability testing findings.

• Familiarity with design system development and maintenance.

• Understanding of front-end development principles to facilitate better collaboration with engineers.

📝 Enhancement Note: The "2-5 Years (Mid-Level)" experience level is inferred from the "What You Will Need" section which asks for "Experience as a product designer or UX designer" and mentions "fast-moving teams" and "comfort working with ambiguity," typical of mid-level roles. The emphasis on "shaping solutions before requirements are fully defined" and "ambiguity" also points to a mid-level to senior candidate who can drive design direction.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A strong portfolio is mandatory, showcasing end-to-end product design work across web and/or mobile products.

• Case studies should clearly articulate the problem, your design process, challenges faced, and the impact of your solutions.

• Demonstrate proficiency in Figma, including examples of rapid iteration and prototyping.

• Highlight experience in designing for complex systems, ideally with an AI or interactive component.

• Showcase your ability to simplify complex AI capabilities into understandable and controllable user experiences. Process Documentation:

• Portfolio case studies should detail your design process, from user research and ideation to wireframing, prototyping, user testing, and final design implementation.

• For AI-specific interactions, clearly explain how you approached designing for trust, control, and transparency.

• Include examples of how you turned complex, multi-step AI functionalities into clear user flows.

• Illustrate how you conducted user research and usability testing to identify and resolve friction points or trust issues.

📝 Enhancement Note: The job description explicitly states, "For design roles, we expect candidates to submit a portfolio as part of the application process." This section is therefore a direct interpretation of that requirement, emphasizing the specific types of work and process documentation that would be most relevant for a role designing AI interaction models. The focus is on demonstrating the candidate's ability to handle complexity, ambiguity, and the unique challenges of AI product design.

💵 Compensation & Benefits

Salary Range:

Based on industry standards for a Mid-Level Product Designer (2-5 years experience) specializing in UX/HCI with AI focus in Seoul, South Korea, the estimated annual salary range is approximately ₩60,000,000 - ₩90,000,000. This estimate considers the high-tech nature of the company, the specialized skills required, and the cost of living in Seoul.

Benefits:

While specific benefits are not detailed, typical offerings for full-time roles in the tech industry in South Korea may include:

• Competitive base salary and potential for performance-based bonuses.

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

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

• Professional development opportunities, such as training, conferences, and access to learning resources.

• Potential for stock options or equity, especially in a startup environment.

• Support for remote work setup if applicable to the hybrid model.

• Team-building activities and company events. Working Hours:

The role is full-time, with an estimated 40 hours per week. The company emphasizes a "rapid speed" and "high talent density" environment, suggesting a dynamic work pace. The hybrid work arrangement implies flexibility in how these hours are structured, balancing remote work with potential in-office collaboration.

📝 Enhancement Note: Salary is an estimation based on industry benchmarks for a mid-level UX/Product Designer in Seoul, South Korea, considering the AI focus. The provided job description does not contain salary information, so this is an inferred range. Benefits are also inferred based on common practices for full-time tech roles in the region. The "40 hours" is a standard assumption for full-time employment.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology (AI, AI Assistants, Software Development)

Company Size: Small (implied by "small, world class teams" and "high talent density")

Founded: Not specified, but context suggests a relatively young or growth-stage company focused on advanced AI.

Team Structure:

• The design team is likely small and highly collaborative, working in close proximity with Product, Engineering, and ML specialists.

• A "high talent density" culture means team members are expected to be experts in their respective fields and capable of independent execution.

• Reporting structure is not explicitly defined but likely involves a Design Lead or Head of Product, with direct collaboration across functional teams.

• Cross-functional collaboration is central, with designers expected to be deeply integrated into product development cycles. Methodology:

• Data Analysis & Insights: While not explicitly stated for design, the company's focus on AI and "real-world task completion" implies a data-driven approach to product development and user understanding.

• Workflow Planning & Optimization: The core of this role is designing and optimizing human-AI workflows for efficiency and user control.

• Automation & Efficiency: The product itself is an AI assistant designed to automate tasks, and the design process likely mirrors this by seeking efficient design and development workflows.

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

📝 Enhancement Note: The company description states "A1 is building a proactive AI smart assistant" and "Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion." The "How We Work" section emphasizes "small, world class teams," "high talent density," and "rapid speed." This information is synthesized to describe the company context and culture, inferring a dynamic, expert-driven, and collaborative environment.

📈 Career & Growth Analysis

Operations Career Level: Mid-Level Product Designer (2-5 Years Experience)

This role is positioned for designers who have moved beyond junior responsibilities and can independently manage design projects, contribute significantly to product strategy, and navigate complex design challenges. The focus on novel interaction models for AI and the need to "shape solutions before requirements are fully defined" indicates a role with significant ownership and strategic impact.

Reporting Structure:

The designer will likely report to a Design Lead or Head of Product, with a strong emphasis on daily collaboration with Product Managers, Engineers, and Machine Learning specialists. This structure promotes a fluid, integrated approach to product development.

Operations Impact:

The impact of this role is substantial. By designing intuitive and trustworthy AI interactions, the Product Designer will directly influence user adoption, satisfaction, and the overall success of the AI assistant product. They will play a critical role in defining how users perceive and interact with AI, shaping the future of human-AI collaboration and driving the company's mission to bring practical AI benefits to a global audience. This involves not just aesthetic design but also the strategic design of AI system behavior and user control.

Growth Opportunities:

• Specialization in AI/HCI: Deepen expertise in designing for AI, human-computer interaction, and emerging AI technologies, becoming a sought-after specialist in a rapidly growing field.

• Design System Leadership: As the company matures, opportunities may arise to lead the development and expansion of their design system, influencing design consistency and efficiency across products.

• Product Strategy Influence: Contribute more significantly to product strategy discussions, leveraging design insights to guide the development of new AI capabilities and features.

• Team Leadership: With proven performance and experience, potential progression into senior design roles, mentorship of junior designers, or even leading a design sub-team.

📝 Enhancement Note: This analysis is based on the "Mid-Level" experience inference and the description of the company's "high talent density" and "rapid speed" culture. The emphasis on "novel interaction models for AI" and "shaping solutions" points to significant growth potential beyond standard UI design roles, into strategic product definition and specialization.

🌐 Work Environment

Office Type: Hybrid Work Environment. The company operates with a "high talent density" and "small, world class teams," suggesting a collaborative and potentially co-located environment for key meetings and brainstorming sessions, while allowing for remote work. The location in Seoul, South Korea, indicates a physical presence there.

Office Location(s): Seoul, South Korea. This is the primary location for any required in-person collaboration or team activities.

Workspace Context:

• Collaborative Environment: Expect a dynamic workspace that fosters close collaboration between design, engineering, and product teams, likely through shared digital tools and scheduled in-person interactions.

• Operations Tools & Technology: Access to industry-standard design tools (e.g., Figma) and potentially collaboration platforms (e.g., Slack, Notion) will be essential. The company's focus on AI may also mean exposure to internal AI tooling or research platforms.

• Team Interaction: Frequent interaction with cross-functional team members is anticipated, including design reviews, sprint planning, and brainstorming sessions focused on complex AI interaction challenges.

Work Schedule:

The standard work schedule is full-time (approximately 40 hours per week). The hybrid model offers flexibility in daily work location, allowing individuals to balance remote work with necessary in-office collaboration in Seoul. The emphasis on "rapid speed" suggests a driven work environment where efficiency and output are prioritized.

📝 Enhancement Note: The hybrid nature is inferred from the "TELECOMMUTE" job type combined with a specific physical location (Seoul). The "high talent density" and "small teams" suggest a focus on effective collaboration, likely involving both remote tools and intentional in-person interactions in their Seoul office.

📄 Application & Portfolio Review Process

Interview Process:

1. Application Submission: Submit your resume and, critically, your portfolio.

2. Portfolio Review: The design team will review submitted portfolios to assess skill sets, process, and alignment with the role's requirements.

3. Initial Screening/Round 1: A virtual or onsite interview to discuss your background, experience, and initial fit for the role.

4. Design Assessment: A practical design challenge, likely focusing on a specific AI interaction problem relevant to the company's product. This might involve creating wireframes, flows, or a prototype.

5. Round 2 Interview: A deeper dive into your design thinking, problem-solving approach, collaboration style, and how you handle ambiguity. This may involve presenting your design assessment and discussing your portfolio in detail.

6. Final Evaluation & Offer: Decision-making is prompt, focusing on exceptional skills and mindset. An offer will be extended to successful candidates.

Portfolio Review Tips:

• Focus on AI/HCI: Prioritize case studies that demonstrate your ability to design complex interactions, manage ambiguity, and consider user trust and control, especially if you have any AI-related projects.

• Process & Rationale: Clearly articulate your design process for each project. Explain why you made specific design decisions, supported by user research, testing, or strategic reasoning.

• Show, Don't Just Tell: Use visuals (wireframes, flows, prototypes, final UI) effectively. For AI interactions, consider showing how you visualized uncertainty, control mechanisms, or multi-step processes.

• Quantify Impact: Where possible, include metrics or outcomes that demonstrate the success of your designs (e.g., improved conversion rates, reduced error rates, increased user satisfaction).

• Figma Proficiency: Ensure your portfolio or accompanying materials highlight your skills with Figma, perhaps by showcasing interactive prototypes or complex component systems.

Challenge Preparation:

• Understand the AI Context: Research proactive AI assistants, common HCI challenges in AI (e.g., trust, control, explainability), and the company's product vision if publicly available.

• Structure Your Approach: For the design challenge, clearly define the problem, identify key user needs and AI capabilities, brainstorm solutions, sketch out flows/wireframes, and articulate potential testing methods.

• Focus on Interaction: Since this is an HCI role, pay special attention to the flow and interaction of the AI system with the user, not just the visual aesthetics. How does the user guide, understand, and correct the AI?

• Communicate Clearly: Be prepared to articulate your thought process, justify your design choices, and discuss trade-offs.

📝 Enhancement Note: The "Interview process" section in the input mentions "2 rounds of interviews and a design assessment" and "portfolio submission." This section expands on that, providing a typical structure for a design role at a tech company, with specific advice tailored to AI/HCI and the emphasis on portfolio and rapid iteration.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: Explicitly mentioned as a required tool for "fast iteration workflows." Essential for wireframing, prototyping, and high-fidelity design.

• Prototyping Tools: Beyond Figma's capabilities, experience with other prototyping tools might be beneficial for more complex interactions or user testing.

• User Research & Testing Platforms: Tools for conducting usability testing, surveys, and analyzing user feedback (e.g., UserTesting.com, Maze, Hotjar).

Analytics & Reporting:

• While not directly a design tool, understanding how to interpret user analytics (e.g., from tools like Google Analytics, Amplitude, Mixpanel) to inform design decisions is valuable.

• Familiarity with data visualization tools might be helpful for presenting design impact. CRM & Automation:

• Not directly relevant to the core design responsibilities, but understanding the user journey within a broader product ecosystem which might involve CRM or automation tools could provide context.

📝 Enhancement Note: Figma is the only tool explicitly mentioned. This section infers other standard tools used by product designers in a tech environment, especially those working with AI and user research. The emphasis is on tools that support rapid iteration, user validation, and understanding user behavior.

👥 Team Culture & Values

Operations Values:

• Innovation & Proactivity: A drive to build novel solutions and anticipate user needs, especially in the emerging field of AI.

• High Talent Density & Excellence: A commitment to working with and being part of a team of highly skilled individuals who execute with precision and speed.

• User-Centricity with AI Focus: Designing for real-world users while deeply understanding the unique capabilities and challenges of AI systems.

• Collaboration & Transparency: Working closely and openly with cross-functional teams to achieve common goals, with a prompt decision-making process.

• Adaptability & Judgment: The ability to thrive in ambiguity, exercise good judgment, and execute independently in a fast-paced environment.

Collaboration Style:

• Integrated Cross-Functional Teams: Designers work hand-in-hand with Product Managers, Engineers, and ML Specialists from concept to launch.

• Agile & Iterative: A culture that embraces rapid iteration, learning from user feedback, and quick decision-making to ship high-quality work.

• Hands-On & Independent: Team members are expected to be self-starters who can bring structure and drive projects forward with minimal oversight.

• Collective Decision-Making: While execution is independent, key decisions are made collectively, fostering shared ownership and alignment.

📝 Enhancement Note: These values and collaboration styles are synthesized from phrases like "high talent density," "hands-on team," "make decisions collectively," "move at rapid speed," "shipping high quality work and learning," "bring structure, exercise judgment, and execute independently," and the overall context of building a novel AI product.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for Novelty: Creating entirely new interaction paradigms for AI that users can understand and trust is a significant, uncharted challenge.

• Managing AI Ambiguity: Dealing with the inherent non-deterministic nature of AI models and translating that into predictable and controllable user experiences.

• Balancing Complexity and Simplicity: Making sophisticated AI capabilities accessible and usable for everyday users without oversimplifying or losing core functionality.

• Building Trust in AI: Designing interfaces and interactions that foster user confidence in the AI's reliability, accuracy, and intent.

• Fast-Paced Environment: Adapting to rapid development cycles and evolving product requirements in a startup setting.

Learning & Development Opportunities:

• Deep AI/HCI Expertise: Gain unparalleled experience in a cutting-edge field, becoming a leader in AI interaction design.

• Product Strategy Contribution: Influence the direction of a potentially groundbreaking AI product.

• Design System Development: Opportunity to contribute to or lead the creation of a design system for a new product.

• Cross-Functional Skill Growth: Develop stronger collaboration and communication skills by working closely with engineering and ML teams.

• Industry Exposure: Work at the forefront of AI innovation and potentially attend relevant conferences or workshops.

📝 Enhancement Note: Challenges are identified based on the core problem statement of designing for "proactive AI," "multi-step reasoning," and "real-world task completion," combined with the company's description of working in "ambiguity" and at "rapid speed." Growth opportunities are derived from the nature of the role and the implied startup environment.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you designed an interface for a complex or ambiguous system. How did you approach making it understandable and controllable for users?" (Focus on process, problem-solving, and user-centricity).

• "How would you design an interaction for an AI that needs to perform a multi-step task, like planning a trip, and ensure the user feels in control and understands its progress?" (Demonstrate understanding of AI workflows, user control, and transparency).

• "Imagine our AI assistant makes a mistake. How would you design the UI and interaction to help the user recover and rebuild trust in the system?" (Showcase judgment on failure handling, trust-building, and error recovery). Company & Culture Questions:

• "What excites you about designing for AI assistants, and what are your biggest concerns regarding human-AI interaction?" (Assess passion, critical thinking, and alignment with the company's mission).

• "How do you typically collaborate with engineers and product managers on fast-moving projects? Can you give an example?" (Evaluate teamwork, communication, and ability to thrive in an agile environment).

• "This role requires working with ambiguity. How do you approach defining requirements and solutions when the problem isn't fully defined?" (Test your comfort with uncertainty and proactive problem-solving). Portfolio Presentation Strategy:

• Structure: For each case study, clearly outline the problem, your role, the process (research, ideation, design, testing), key decisions, challenges, and outcomes.

• Focus on AI/HCI: If you have any AI-related projects, prioritize them. If not, highlight projects that involve complex systems, user control, or managing uncertainty, and draw parallels to AI.

• Demonstrate Figma Skills: Be prepared to show interactive prototypes or explain how you used Figma's features for rapid iteration.

• Explain Your "Why": Articulate the rationale behind your design choices, supported by user insights or design principles.

• Be Prepared for Design Challenges: Practice sketching quick flows or wireframes on a whiteboard or digital equivalent, thinking aloud as you go.

📝 Enhancement Note: These questions and strategies are tailored to the specific role of a Product Designer focusing on AI/HCI, drawing from the job description's emphasis on ambiguity, complex systems, user control, trust, and rapid iteration.

📌 Application Steps

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

• Submit your application through the provided link on Ashby.

• Portfolio Customization: Curate your portfolio to prominently feature projects that showcase your interaction design skills, experience with complex systems, and any work related to AI or human-machine interaction. If direct AI experience is limited, highlight projects demonstrating your ability to simplify complexity, manage user control, or build trust in digital products.

• Resume Optimization: Tailor your resume to highlight keywords from the job description, such as "Product Design," "UX Design," "HCI," "Figma," "Interaction Design," "Prototyping," "User Research," and experience with "complex systems" or "ambiguity." Quantify achievements wherever possible.

• Interview Preparation: Practice articulating your design process and rationale, especially for hypothetical AI interaction challenges. Prepare to discuss your portfolio in detail and how your skills align with the company's mission and culture.

• Company Research: Investigate Bjak and their vision for AI assistants. Understand their "high talent density" and "rapid speed" culture to better tailor your responses and demonstrate cultural fit.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions to provide a comprehensive overview. All details regarding salary, benefits, and specific interview processes should be verified directly with the hiring organization, Bjak, before making application decisions.