Head of Design / Principal Designer

📍 Job Overview

Job Title: Head of Design / Principal Designer

Company: BoostDraft

Location: Tokyo, Japan (Fully Remote with optional in-person days near Tokyo)

Job Type: Full-Time

Category: Product Design / Design Leadership

Date Posted: August 17, 2026

Experience Level: 5-10 years (Mid to Senior Level)

Remote Status: Fully Remote

🚀 Role Summary

• Lead and scale the user research practice, emphasizing rapid, prototype-driven user testing to validate product assumptions and mitigate risks.

• Define and champion the company's design philosophy, ensuring a balance between speed, polish, and leveraging AI-enabled workflows.

• Build, maintain, and evolve a scalable design system that encodes user insights and empowers product teams to move with confidence.

• Coach and mentor a team of product designers, fostering a culture of learning through making, testing, and iterative development.

• Collaborate closely with Product and Engineering to ensure user insights directly influence roadmap prioritization and product direction.

📝 Enhancement Note: The "Head of Design / Principal Designer" title suggests a dual role, requiring both strategic leadership and hands-on design execution. The emphasis on AI-assisted prototyping and a "prototype-first" mindset indicates a modern, agile design approach critical for this role. The company's focus on legal tech and a Microsoft Word add-in implies a need for domain understanding or the ability to quickly grasp complex user workflows within a professional software context.

📈 Primary Responsibilities

• Own and lead the user research practice, prioritizing early, prototype-driven user testing for rapid exploration and validation.

• Utilize AI-assisted prototyping tools to quickly explore design concepts, validate assumptions, and identify potential risks before significant engineering investment.

• Transform ambiguous user feedback and fragmented requests into clear hypotheses, actionable prototypes, and documented learnings that guide product strategy.

• Establish and refine the company's design philosophy and principles, focusing on the optimal balance between design speed, quality, AI integration, and traditional design processes.

• Ensure all design decisions are evidence-based, derived from rigorous user testing and qualitative research rather than subjective opinions.

• Develop, scale, and maintain a comprehensive design system that captures user insights and enables efficient product development across teams.

• Champion and implement modern design tools and workflows, particularly AI-driven solutions, to reduce the cycle time from initial idea to user feedback and decision-making.

• Lead, coach, and mentor a team of product designers, guiding them in adopting prototype-first and research-led design methodologies.

• Set clear expectations for designers, emphasizing that continuous learning and improvement stem from active creation, testing, and iteration.

• Remain hands-on with design tasks, including prototyping, user flow testing, and unblocking critical high-impact design work.

• Foster deep, collaborative partnerships with Product Management and Engineering teams, ensuring a shared understanding of user needs and a unified approach to product development.

• Facilitate the organization's understanding of users through effective communication of prototypes, compelling narratives, and clear synthesis of research findings.

• Design across multiple platforms, including web and desktop applications, ensuring a consistent and high-quality user experience.

📝 Enhancement Note: The responsibilities highlight a strong emphasis on a "prototype-first" and "research-led" design process, crucial for a company focused on rapid iteration and product-market fit. The expectation to "make design a force multiplier" by scaling a design system and championing AI tools suggests a strategic role in increasing team efficiency and output.

🎓 Skills & Qualifications

Education: While no specific degree is listed, a Bachelor's or Master's degree in Design, Human-Computer Interaction, Psychology, or a related field is often preferred for senior design roles. Equivalent practical experience will be strongly considered.

Experience: 5-10 years of progressive experience in product design, with a significant portion in leadership or principal-level roles. Demonstrated experience in scaling design practices within a growing tech company is essential.

Required Skills:

• Product Design: Proven ability to design intuitive, effective, and engaging user experiences for complex software applications.

• User Research: Fluency in qualitative user research methodologies, including concept testing, usability testing, and workflow validation.

• Prototyping: Strong expertise in creating low-fidelity to high-fidelity prototypes using tools like Figma, Sketch, Adobe XD, or similar, with a bias towards rapid iteration.

• AI-Assisted Design: Hands-on experience and a genuine curiosity for exploring and applying AI-assisted design and prototyping tools.

• Design Systems: Deep understanding of design system principles, with the ability to build, maintain, and evolve scalable design systems and component libraries.

• Cross-Platform Design: Experience designing for diverse platforms, including web and desktop applications, ensuring consistency and optimal user experience.

• Collaborative Leadership: A proven ability to lead and coach design teams, fostering a collaborative environment and working effectively with Product and Engineering stakeholders.

• Agile Methodology: Familiarity with agile development processes and the ability to integrate design seamlessly into rapid iteration cycles.

Preferred Skills:

• Legal Tech or SaaS Experience: Prior experience in the legal technology sector or with Software-as-a-Service (SaaS) products.

• Team Scaling: Experience in building and scaling a design team from the ground up.

• Mentorship: Demonstrated ability to mentor junior designers and foster their professional growth.

• Stakeholder Management: Strong skills in communicating design decisions and rationale to executive leadership and cross-functional teams.

• Design Philosophy Development: Experience in defining and articulating a clear design philosophy and principles for an organization.

📝 Enhancement Note: The required skills strongly emphasize practical, hands-on design execution alongside leadership capabilities. The explicit mention of AI-assisted tools and a "prototype-first" mindset indicates a forward-thinking approach to design operations. The "Submission Guidelines" in the raw input also heavily emphasize the design process and leadership philosophy, making these key areas to highlight.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Design Process Documentation: Comprehensive case studies detailing the entire design process, from problem definition and user research to ideation, prototyping, testing, iteration, and final implementation. Clearly articulate the rationale behind decisions, challenges encountered, and how they were overcome.

• Leadership & Management Philosophy: A clear description of your leadership approach, managerial philosophy, and specific achievements in leading and scaling design teams. Highlight your ability to foster growth and autonomy within a team.

• Impact & Results: Quantifiable evidence of design's impact on product success, user engagement, efficiency improvements, or business objectives. Focus on measurable outcomes and ROI where possible.

• System Thinking: Examples demonstrating your ability to think about design systems, reusable patterns, and scalable design solutions that support efficient product development.

• AI Tool Integration: Showcase any projects where AI-assisted design tools were leveraged, detailing the benefits and outcomes.

Process Documentation:

• Workflow Optimization: Demonstrate an understanding of how design processes can be optimized for speed and efficiency, particularly in a remote, agile environment.

• User-Centric Methodologies: Illustrate the application of user research and testing throughout the design lifecycle to inform and validate design decisions.

• Design System Implementation: Provide examples of how design systems were implemented, maintained, and evolved to ensure consistency and accelerate development.

📝 Enhancement Note: The "Submission Guidelines" are critical here, directly stating that the "rationale and methodology behind your work" is valued as much as the final visuals. This means portfolios must go beyond showcasing final designs to deeply illustrating the problem-solving and decision-making process. The emphasis on leadership and managerial philosophy is also a key differentiator for this role.

💵 Compensation & Benefits

Salary Range: Given the "Head of Design / Principal Designer" title, 5-10 years of experience, and a fully remote role in Japan (with potential for global remote talent), the estimated annual salary range in JPY would be approximately ¥10,000,000 - ¥16,000,000. This range is based on industry benchmarks for senior design leadership roles in tech companies operating in or hiring from Japan, considering the company's growth stage and funding.

Benefits:

• Flexible Working Hours: Employees can structure their workdays within defined flexible and core time blocks (Flexible: 6:00 am - 11:30 am / 3:00 pm - 10:00 pm; Core: 11:30 am - 3:00 pm JST).

• Fully Remote Work: The primary work arrangement is remote, allowing employees to work from home or equivalent locations.

• Visa Sponsorship: Assistance with obtaining a visa is provided for candidates who wish to relocate to Japan.

• Virtual Office: Access to a virtual office environment for interactive engagement with colleagues.

• 5-Day Workweek: Standard work schedule with Saturdays and Sundays off, plus company-defined holidays, year-end/new-year breaks, and others.

• Fixed Overtime Pay: Included in the full-time employment status, indicating compensation for potential overtime work.

• Probation Period: A 6-month probationary period applies.

• Prevention of Passive Smoking: Measures are in place to prevent passive smoking.

Working Hours: 40 hours per week, with flexible working time blocks and a core collaboration period.

📝 Enhancement Note: The salary estimation is based on the "Head of Design / Principal Designer" role, the specified experience level, and the location (Japan). The benefits listed are directly extracted from the provided text and tailored for clarity. The flexible working hours are a significant perk for operations professionals.

🎯 Team & Company Context

🏢 Company Culture

Industry: Legal Tech / Software (SaaS). BoostDraft operates in the legal technology sector, providing a Microsoft Word add-in to automate tedious formatting and improve the efficiency of legal drafting. This places them at the intersection of Legal Services and Enterprise Software.

Company Size: The company has adopted a lean, funded startup model, with growth indicated by 10,000+ paying users and adoption at 17 of Japan's top 20 law firms. While an exact employee count isn't provided, the recent funding and user growth suggest a team of 20-100+ individuals, likely operating in a fast-paced, agile environment.

Founded: Founded by MIT and Stanford alumni. The company has achieved significant traction and profitability primarily through word-of-mouth before securing external funding in January 2025. This indicates a strong product-market fit and a foundation built on user satisfaction.

Team Structure:

• Design Team: The Head of Design will lead and grow a team of product designers. The team structure likely involves designers working closely with Product Managers and Engineers on specific product areas.

• Cross-functional Collaboration: There is a strong emphasis on "shoulder-to-shoulder" collaboration between Design, Product, and Engineering to ensure learning velocity drives roadmap and prioritization.

• Leadership: Reporting directly to founders or senior management, with opportunities to learn from experienced leaders.

Methodology:

• Prototype-First & Research-Led: The core design methodology emphasizes rapid exploration through prototyping and validation through user testing.

• AI Integration: A proactive approach to leveraging AI in design and prototyping tools to enhance efficiency and accelerate learning.

• Data-Driven Decisions: Design decisions are expected to be grounded in evidence from real users and rapid testing.

• Agile Development: The company operates in an agile manner, indicated by the focus on rapid iteration and continuous learning.

Company Website: boostdraft.com

📝 Enhancement Note: The company's origin (MIT/Stanford alumni), bootstrapping success, and recent funding suggest a culture that values innovation, efficiency, and strong product-led growth. The legal tech focus implies a need for precision and reliability in design. The virtual office aspect hints at a modern, tech-forward approach to remote collaboration.

📈 Career & Growth Analysis

Operations Career Level: This role is at a Principal/Head of Design level, signifying a senior leadership position. It involves strategic oversight of the design function, team management, and significant influence on product direction. For an operations professional, this translates to a role that shapes how the product is perceived, used, and iterated upon, directly impacting user adoption and retention metrics.

Reporting Structure: The Head of Design will likely report to a founder or a very senior executive (e.g., CEO, CPO). This direct line of communication allows for significant influence and visibility across the organization. The role involves leading a team of product designers who will likely report into this position.

Operations Impact: In this role, design impact is measured through user adoption, engagement, retention, and overall product satisfaction. By driving user insight and setting design standards, this position directly contributes to the product-market fit and scalability of BoostDraft's legal drafting software, influencing revenue through user acquisition and loyalty.

Growth Opportunities:

• Team Leadership & Scaling: Opportunity to build, shape, and scale the design team from its current state to support future growth, developing leadership and team-building skills.

• Product Strategy Influence: Direct involvement in shaping product strategy through user insights and design leadership, offering significant growth in strategic thinking and decision-making.

• Industry Expertise Development: Deepen expertise in legal tech and SaaS product development, understanding the unique challenges and opportunities within this specialized market.

• AI in Design Advancement: Become a leader in applying cutting-edge AI technologies within the design workflow, staying at the forefront of design innovation.

• Potential for broader GTM involvement: As a key leader, there may be opportunities to contribute to go-to-market strategies by translating user needs and product value propositions into compelling design narratives.

📝 Enhancement Note: The "Head of Design" title implies a strategic leadership role that interfaces directly with business objectives, making it highly relevant for operations professionals interested in the strategic side of product development and user adoption. The growth opportunities focus on leadership, strategy, and specialized industry knowledge.

🌐 Work Environment

Office Type: Fully remote, with an optional virtual office environment. This indicates a modern, distributed workforce model.

Office Location(s): While the company headquarters are in Japan, the role is fully remote and does not mandate relocation. Employees can work from home or any equivalent location. There's a possibility of commuting to a company-designated location near Tokyo for business reasons, perhaps a few times a month, for those residing nearby.

Workspace Context:

• Remote Collaboration Tools: Expect to utilize a suite of digital collaboration tools for communication, project management, and design work, typical of a remote-first tech company.

• Virtual Office Experience: The "virtual office" offers an interactive way to connect with colleagues, suggesting a deliberate effort to foster social interaction and serendipitous encounters in a distributed setting.

• Flexible Workspace: Employees have the autonomy to choose their work environment, promoting work-life balance.

Work Schedule: Flexible working hours are a key feature, with designated flexible and core time blocks (Flexible: 6:00 am - 11:30 am / 3:00 pm - 10:00 pm JST; Core: 11:30 am - 3:00 pm JST). This allows for adaptation to different time zones and personal schedules while ensuring essential collaboration.

📝 Enhancement Note: The emphasis on a "fully remote" setup and "flexible working time" is a significant draw for operations professionals seeking autonomy and work-life balance. The virtual office concept is an interesting addition, suggesting a company that actively tries to replicate in-office social dynamics digitally.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of resume and portfolio against core requirements, with a focus on demonstrated design process, leadership experience, and AI tool familiarity.

• Portfolio Review & Discussion: A dedicated session to walk through selected case studies from your portfolio. Expect to discuss your design process, problem-solving approach, user research methodologies, and the impact of your work. Emphasis will be placed on your leadership philosophy and how you scale design quality.

• Skills-Based Interview: Technical deep dive into user research, prototyping, design systems, and experience with AI design tools. This may include scenario-based questions or a small design exercise.

• Cross-Functional Collaboration Interview: Discussion with Product and Engineering leaders to assess your ability to collaborate effectively, communicate design rationale, and influence roadmap decisions.

• Leadership & Culture Fit Interview: Conversation with founders or senior management to evaluate your leadership style, cultural alignment with BoostDraft's values, and vision for the design function.

Portfolio Review Tips:

• Showcase the "Why" and "How": For each case study, clearly articulate the problem, your hypothesis, the research conducted, the design decisions made, the prototypes created, the testing performed, and the resulting outcomes (quantified where possible).

• Highlight Leadership: Explicitly detail your experience in leading teams, mentoring designers, and implementing design systems. Dedicate a section or specific case studies to demonstrating your managerial philosophy and achievements.

• Demonstrate AI Proficiency: Include examples where you've leveraged AI tools in your design process, explaining the benefits and how they improved efficiency or quality.

• Focus on Impact: Quantify the results of your design work. How did it improve user engagement, conversion rates, efficiency, or solve a critical business problem?

• Structure for Clarity: Organize your portfolio logically. Use clear headings, concise descriptions, and high-quality visuals. Ensure it's easy to navigate and understand your contributions.

Challenge Preparation:

• Design Thinking: Be prepared to discuss your approach to problem-solving, particularly for ambiguous challenges in a legal tech context.

• User Research Scenarios: Anticipate questions about how you would conduct user research for a new feature or to address specific user feedback.

• Design System Strategy: Be ready to articulate how you would build, scale, or evolve a design system for a growing product.

• Leadership Scenarios: Prepare for questions about how you would coach a designer, handle design disagreements, or prioritize competing design requests.

• AI Integration Strategy: Think about how AI can be further integrated into BoostDraft's design and product development workflow.

📝 Enhancement Note: The application process description emphasizes portfolio depth, leadership philosophy, and AI tool integration. This is crucial for candidates to understand how to present themselves effectively, especially given the explicit "Submission Guidelines" in the raw input.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Figma (highly probable given industry standards and collaborative remote work), Sketch, Adobe XD.

• AI-Assisted Design & Prototyping: Tools like Uizard, Galileo AI, or similar AI-powered tools for rapid concept generation and prototyping.

• User Research & Testing: Tools for usability testing (e.g., UserTesting.com, Maze), survey platforms (e.g., SurveyMonkey, Typeform), and qualitative data synthesis tools.

• Design Systems: Tools for creating and managing design systems (e.g., Zeroheight, Storybook, or integrated within Figma).

Analytics & Reporting:

• Product Analytics: Tools like Amplitude, Mixpanel, or Pendo to track user behavior, engagement, and feature adoption.

• Web Analytics: Google Analytics or similar for website traffic and user journey analysis.

• Dashboarding: Tools for creating and sharing design performance dashboards (e.g., Tableau, Power BI, or built-in analytics features of other platforms).

CRM & Automation:

• CRM: While not directly a design tool, understanding how design impacts CRM data and user journeys is beneficial. Salesforce, HubSpot, or similar.

• Project Management: Tools for managing design workflows and collaborating with engineering teams (e.g., Jira, Asana, Trello, Notion).

• Communication: Slack, Microsoft Teams for real-time collaboration.

📝 Enhancement Note: The role's emphasis on AI-assisted design and prototyping means candidates should be prepared to discuss specific tools and their practical application. The legal tech context suggests a need for robust data management and integration capabilities, even if indirectly related to the design function.

👥 Team Culture & Values

Operations Values:

• User-Centricity: A deep commitment to understanding and serving user needs, driving product decisions based on user insight and research.

• Bias for Action & Iteration: A culture that values rapid exploration, learning through making, and continuous improvement rather than perfection in the first iteration.

• Collaboration & Transparency: Open communication and close partnership across Design, Product, and Engineering teams, fostering a shared understanding and collective ownership.

• Innovation & Efficiency: Embracing new technologies (like AI) and modern workflows to enhance productivity, reduce cycle times, and deliver exceptional user experiences efficiently.

• Autonomy & Trust: Empowering individuals with the freedom and responsibility to lead their work, make decisions, and drive outcomes, particularly evident in the remote-first and flexible work environment.

Collaboration Style:

• Cross-functional Partnership: Designers work "shoulder-to-shoulder" with Product Managers and Engineers, integrating design thinking early and often in the development process.

• Evidence-Based Discussions: Design decisions and product roadmap discussions are grounded in user research, prototype testing, and data, fostering objective and productive conversations.

• Knowledge Sharing: A culture that encourages sharing learnings from user research, design experiments, and new tool explorations to benefit the entire team.

• Agile & Iterative: Embracing an agile mindset where feedback loops are short, and collaboration is fluid, adapting quickly to new information and user needs.

📝 Enhancement Note: The company's values and collaboration style are heavily influenced by its startup nature, remote-first approach, and focus on rapid product development. The emphasis on user-centricity and evidence-based decision-making is critical for operations professionals to understand how design contributes to business goals.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Speed and Quality: Effectively navigating the tension between rapid prototyping and iteration for product-market fit versus maintaining high design quality and polish.

• Scaling Design Systems: Developing and maintaining a robust design system that can scale with the company's growth and diverse product needs.

• Integrating AI Seamlessly: Effectively incorporating AI-assisted design tools into existing workflows without disrupting team productivity or compromising design integrity.

• Leading a Remote Team: Fostering strong team cohesion, mentorship, and effective collaboration within a fully distributed design team.

• Domain Complexity: Deeply understanding the nuances of legal drafting workflows to design intuitive and effective solutions for legal professionals.

Learning & Development Opportunities:

• Leadership Development: Opportunities to hone leadership, team management, and strategic planning skills by building and scaling the design function.

• Product Strategy Acumen: Gaining deeper insight into product strategy, roadmap prioritization, and the business impact of design decisions.

• AI & Future of Design: Staying at the forefront of emerging AI technologies and their application in product design, becoming an expert in this evolving field.

• Legal Tech Innovation: Developing specialized knowledge in the legal tech industry, understanding its unique challenges and opportunities for innovation.

• Cross-Functional Influence: Enhancing skills in influencing stakeholders across Product, Engineering, and potentially Sales/Marketing by effectively communicating design value and user insights.

📝 Enhancement Note: The challenges are directly linked to the role's responsibilities and the company's stage of growth. The learning opportunities highlight the strategic and leadership growth potential, making this role attractive for ambitious design leaders.

💡 Interview Preparation

Strategy Questions:

• "How would you approach defining BoostDraft's design philosophy, considering our focus on AI-assisted workflows and legal tech?" (Focus on your framework for developing principles, balancing innovation with user needs.)

• "Describe your process for leading user research when faced with ambiguous product requirements or fragmented user feedback. How do you turn this into actionable insights?" (Highlight your methodology for hypothesis generation, prototype testing, and synthesis.)

• "Imagine we need to build out a scalable design system for our Microsoft Word add-in. What are your first steps, and how would you ensure adoption across product and engineering teams?" (Discuss your approach to design system architecture, component libraries, and cross-functional collaboration.) Company & Culture Questions:

• "How do you foster a culture of continuous learning and iteration within a design team, especially in a remote setting?" (Provide examples of your mentorship style and how you encourage experimentation.)

• "BoostDraft has achieved significant growth primarily through word-of-mouth. How can design leadership contribute to this organic growth and customer advocacy moving forward?" (Connect design to user satisfaction, product experience, and potential for word-of-mouth referrals.)

• "What are your thoughts on the role of AI in the future of product design, and how would you strategically integrate it into BoostDraft's design process?" (Demonstrate your forward-thinking approach and practical understanding of AI tools.) Portfolio Presentation Strategy:

• Structure for Narrative: Frame your case studies as stories, starting with the problem, detailing your journey of discovery and solution, and concluding with the impact.

• Quantify Impact: Whenever possible, present metrics showing the success of your designs (e.g., increased engagement, reduced errors, improved efficiency).

• Articulate Process, Not Just Pixels: Clearly explain why you made certain design decisions, the research that informed them, and the trade-offs you considered.

• Highlight Leadership Experience: For relevant case studies, explicitly discuss your role in leading others, mentoring, or managing projects.

• Be Ready for Deep Dives: Prepare to answer detailed questions about any aspect of your portfolio, from initial research methods to specific UI choices.

📝 Enhancement Note: These questions are designed to probe the candidate's strategic thinking, leadership capabilities, and practical application of design methodologies, particularly concerning AI and the company's specific context (legal tech, remote work).

📌 Application Steps

To apply for this Head of Design / Principal Designer position:

• Submit your application through the provided application link.

• Tailor Your Resume: Highlight your leadership experience, experience in scaling design teams, and proficiency with AI-assisted design tools. Emphasize achievements in user research and design system development.

• Curate Your Portfolio: Select 2-3 of your most impactful case studies that best demonstrate your design process, leadership philosophy, and ability to drive results. Ensure each case study clearly outlines the problem, your approach, your role, the solutions, and the measurable outcomes.

• Prepare Your Leadership Narrative: Be ready to articulate your managerial philosophy and key achievements as a leader, as requested in the submission guidelines.

• Research BoostDraft: Understand their product (Microsoft Word add-in for legal drafting), their market position (legal tech, SaaS), their recent funding, and their company culture as described.

• Practice Your Presentation: Rehearse walking through your portfolio, focusing on clear articulation of your design process, decision-making rationale, and leadership contributions.

⚠️ 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.

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