Product Designer (Mobile)

📍 Job Overview

Job Title: Product Designer (Mobile)

Company: Aphex

Location: London, England, United Kingdom

Job Type: FULL_TIME

Category: Product Design (Mobile UX/UI)

Date Posted: March 29, 2026

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

Remote Status: Remote OK (with UK/Europe/Australia timezone considerations)

🚀 Role Summary

• Spearhead the end-to-end design of mobile features for Aphex's core products, with a primary focus on the Diary application.

• Define and evolve intuitive mobile interaction patterns tailored for field workers in demanding construction environments.

• Collaborate intensively with Product Managers and Flutter Engineers to ensure seamless design implementation and a high-quality user experience across platforms.

• Drive the evolution of Aphex's design system to encompass robust mobile components, bridging the quality gap between web and mobile experiences.

• Own the mobile user experience, directly impacting Diary's adoption and revenue growth as a key strategic initiative for 2026.

📝 Enhancement Note: While the job title is "Product Designer (Mobile)", the responsibilities clearly indicate a specialization in UX/UI design for mobile applications within a B2B SaaS context, specifically targeting field users in the construction industry. The experience level is inferred as Mid-Level due to the 4+ years of experience requirement and the scope of ownership.

📈 Primary Responsibilities

• Lead the complete design lifecycle for new mobile features, from initial concept and user research through to final UI implementation and post-launch iteration.

• Develop and refine user flows, interaction models, and visual designs that address the unique constraints of mobile usage in construction settings, such as outdoor visibility, gloved hands, shared devices, and intermittent connectivity.

• Proactively identify and address usability issues and quality gaps between the web and mobile applications to ensure a consistent and premium user experience.

• Partner closely with Flutter mobile engineers to maintain design fidelity, provide clear specifications, and conduct thorough design reviews during development sprints.

• Contribute to the strategic direction of the mobile product roadmap by providing design insights based on user needs, industry trends, and business objectives.

• Actively participate in product scoping sessions, offering design expertise to inform feature prioritization and feasibility assessments.

• Champion the mobile user experience internally, advocating for user needs and design best practices within cross-functional teams.

• Evolve and maintain the Aphex design system, specifically focusing on mobile components, patterns, and guidelines to ensure scalability and consistency.

📝 Enhancement Note: The responsibilities emphasize end-to-end ownership and a strong collaborative approach with engineering and product management, typical of a mid-level to senior product designer role focused on a specific platform. The mention of "Diary is our biggest revenue lever for 2026" highlights the strategic importance of this role.

🎓 Skills & Qualifications

Education: No specific degree is mandated, but a strong portfolio showcasing relevant experience in product design is essential.

Experience: Minimum of 4 years of professional product design experience, with a significant focus on mobile application design.

Required Skills:

• Proven track record in end-to-end product design, demonstrated through a strong portfolio showcasing mobile applications (iOS, Android, or cross-platform).

• Demonstrated ability to design for complex B2B workflows and industrial user contexts, moving beyond simple consumer app paradigms.

• Excellent interaction design skills, including proficiency in mapping out user flows, defining states, handling edge cases, and creating intuitive navigation.

• Deep understanding of platform-specific design constraints (iOS and Android) and the ability to design solutions that are technically feasible and performant.

• Proficiency across the entire design process: user research, ideation, wireframing, prototyping, detailed UI design, and quality assurance (QA).

• Strong aptitude for remote-first work, including excellent written communication skills and the ability to provide and receive feedback asynchronously.

Preferred Skills:

• Hands-on experience with Flutter development, or a strong understanding of its cross-platform capabilities and constraints.

• Experience designing for field workers, industrial users, or environments with unique operational challenges (e.g., construction sites, logistics).

• Prior experience in Vertical SaaS or B2B product environments, understanding enterprise user needs and adoption drivers.

• Experience contributing to or building design systems, ensuring consistency and scalability across products.

• Familiarity with or knowledge of the construction, infrastructure, or heavy industry sectors.

📝 Enhancement Note: The requirements highlight a specific need for designers who can handle complexity and real-world constraints, differentiating this role from standard consumer app design. The preference for Flutter experience and construction industry knowledge indicates a desire for a candidate who can hit the ground running with minimal ramp-up time.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A comprehensive portfolio showcasing end-to-end mobile product design projects, with at least one significant case study focused on complex B2B or industrial workflows.

• Detailed case studies that illustrate your design process, including problem definition, user research, ideation, interaction design, UI design, and the final implemented solution.

• Evidence of designing for real-world constraints such as varying connectivity, different device types, or user environments (e.g., outdoor, PPE).

• Examples demonstrating your ability to evolve or contribute to a design system, particularly for mobile components.

• Demonstrations of how you collaborated with engineering teams (ideally Flutter) to ensure successful implementation of your designs.

Process Documentation:

• Case studies should clearly articulate the problem statement, your role, the design challenges, the solutions proposed, and the measurable outcomes or impact of your work.

• Documented examples of your contribution to user flows, interaction patterns, and UI design for mobile applications.

• Evidence of how you conducted user research, gathered feedback, and iterated on designs based on that input.

• Demonstrations of your QA process for design and how you ensured the quality of shipped features.

📝 Enhancement Note: The emphasis on "complex workflows" and "real constraints" in the portfolio requirements suggests that the hiring team is looking for practical problem-solving skills and a deep understanding of user context, rather than purely aesthetic design. The mention of Flutter and design systems further guides portfolio selection.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for a Mid-Level Product Designer with 4+ years of experience in London, UK, and considering the remote-first nature and specialized industry focus, a competitive salary range would typically be between £60,000 - £85,000 per annum.

Benefits:

• Remote-first role with flexible working hours and asynchronous collaboration.

• Opportunity to define and lead mobile design for a high-growth product area.

• Path to Senior Designer or Mobile Design Lead as the team and product evolve.

• Direct influence on product direction, working closely with senior leadership (Head of UX, CEO).

• Annual team offsite for connection and strategic planning (e.g., past trip to Da Nang, Vietnam).

• Potential for equity or stock options, common in high-growth SaaS startups.

• Standard benefits package including health, dental, and vision insurance (regionally applicable).

• Professional development opportunities, including conferences and training.

Working Hours: While a standard 40-hour work week is implied, the role emphasizes flexible working hours and asynchronous collaboration, accommodating different time zones (UK, Europe, Australia).

📝 Enhancement Note: Salary estimation is based on typical mid-level product designer compensation in London, UK, adjusted for a remote role in a growing SaaS company. Benefits are extrapolated from common startup offerings and specific mentions in the job description.

🎯 Team & Company Context

🏢 Company Culture

Industry: Construction Technology (ConTech) / SaaS. Aphex operates at the intersection of enterprise software and the construction industry, aiming to digitize and streamline complex project planning and execution.

Company Size: Aphex is likely a growing startup or scale-up, indicated by the need to grow the design team and the description of a "small, senior design team." This suggests a dynamic, fast-paced environment where individuals can have a significant impact.

Founded: Aphex was founded with a mission to replace outdated spreadsheets in construction planning with modern, collaborative tools. This implies a culture driven by innovation and a desire to disrupt traditional industry practices.

Team Structure:

• The design team is described as "small, senior" and needs to grow, suggesting a flat hierarchy with direct access to leadership.

• The role involves daily collaboration with Product Managers and close partnership with Flutter Engineers.

Methodology:

• Aphex emphasizes building "tools construction teams are genuinely proud to use," indicating a user-centric approach focused on quality and usability.

• The company values ownership, focus on quality, and problem-solving.

• A remote-first and asynchronous communication style is fundamental to their operations.

• The strategy involves owning the planning layer as a gateway to broader orchestration solutions.

Company Website: https://aphex.co

📝 Enhancement Note: The company culture is positioned as innovative, user-focused, and collaborative, with a strong emphasis on remote work and asynchronous communication. The industry context of construction technology implies a need for practical, robust solutions that address real-world operational challenges.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a pivotal "first dedicated mobile designer," indicating a mid-level to early senior position. The opportunity to "define what good looks like" for mobile experience is significant.

Reporting Structure: The designer will report to the Head of UX and work closely with the CEO (acting Head of Product). This direct line to leadership offers high visibility and influence.

Operations Impact: The mobile experience, particularly within the Diary product, is identified as Aphex's "biggest revenue lever for 2026." Therefore, this role has a direct and substantial impact on the company's financial success and market position.

Growth Opportunities:

• Specialization: Deepen expertise in mobile UX/UI design for complex, industrial B2B applications.

• Leadership: Potential to grow into a Senior Designer or Mobile Design Lead role as the team expands, managing other designers and setting mobile design strategy.

• Strategic Influence: Contribute significantly to product strategy and roadmap decisions due to the direct reporting line to senior leadership and the critical nature of the mobile product.

• Industry Expertise: Develop specialized knowledge in construction technology, a growing and impactful sector.

• Design System Ownership: Lead the expansion and evolution of the mobile component of the design system.

📝 Enhancement Note: The growth path is clearly outlined, emphasizing leadership and strategic impact. The role is designed for someone who can take initiative and grow with the company, making it attractive for ambitious designers.

🌐 Work Environment

Office Type: Remote-first. The company operates without a central physical office for daily work, relying on distributed teams.

Office Location(s): While the role is remote, the company has a presence and likely team members in the UK, Europe, and Australia, suggesting a distributed, global team structure. The primary focus for this role is within the UK and European time zones.

Workspace Context:

• A fully remote work environment that requires strong self-discipline, asynchronous communication skills, and proficiency with collaboration tools.

• The team uses tools and technologies that support remote collaboration, aiming for an efficient and connected virtual workspace.

• Opportunities for interaction are primarily through digital channels, with periodic in-person events like annual offsites to foster team connection.

Work Schedule: Flexible working hours are offered, with an emphasis on asynchronous collaboration. This allows designers to structure their day effectively while ensuring alignment across different time zones and project needs.

📝 Enhancement Note: The remote-first nature necessitates a high degree of autonomy and strong communication skills. The flexibility in working hours is a key benefit for work-life balance, but requires careful time management to ensure effective collaboration across distributed teams.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of CV and portfolio to assess experience, skills, and alignment with the role's requirements, particularly the mobile design focus and B2B/complex workflow experience.

• Portfolio Presentation & Discussion: A deep dive into selected case studies from your portfolio, focusing on your design process, problem-solving approach, interaction design decisions, and how you handled constraints and collaborated with engineers. Be prepared to discuss your role and impact.

• Design Challenge/Exercise: Likely a practical exercise to assess your design thinking, problem-solving skills, and ability to design for the specific context of construction field workers. This might involve a short task or a more involved case study to be completed within a timeframe.

• Team & Leadership Interviews: Meetings with the Head of UX, Product Managers, and potentially engineers to assess cultural fit, collaboration style, and strategic thinking. Discussions will likely focus on your approach to remote work, feedback, and driving quality.

• Final Interview: Potentially a conversation with the CEO or other senior leadership to discuss overall fit, vision, and strategic alignment.

Portfolio Review Tips:

• Highlight Mobile Mastery: Showcase your strongest mobile design projects, emphasizing end-to-end ownership and complexity.

• Deconstruct Your Process: For each case study, clearly outline the problem, your role, research methods, design decisions, iterations, and measurable outcomes.

• Emphasize Constraints: Detail how you designed for specific mobile constraints (connectivity, outdoor visibility, gloved hands, shared devices) relevant to construction sites.

• Showcase Collaboration: Illustrate how you partnered with PMs and engineers, including examples of design reviews and implementation fidelity.

• Quantify Impact: Where possible, present metrics or qualitative feedback that demonstrate the success and impact of your designs.

• Tailor to Aphex: Select projects that demonstrate experience with B2B SaaS, complex workflows, or industrial/field worker applications.

Challenge Preparation:

• Understand Aphex's product and target users (construction professionals).

• Practice designing for offline/intermittent connectivity scenarios.

• Be ready to articulate design decisions based on user needs and business impact.

• Prepare to explain your approach to creating intuitive interfaces for non-desk workers.

• Focus on clear, concise communication and demonstrating a structured design process.

📝 Enhancement Note: The interview process is expected to be rigorous, focusing heavily on practical design skills, problem-solving in complex environments, and collaborative capabilities. A well-prepared and tailored portfolio is crucial for success.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Figma (or similar industry-standard tools like Sketch, Adobe XD) for UI design, wireframing, and prototyping.

• Collaboration: Tools like Slack, Jira, Confluence for team communication, project management, and documentation.

• Design Systems: Experience with tools and methodologies for building and maintaining design systems.

Analytics & Reporting:

• While not explicitly stated, experience with product analytics tools (e.g., Amplitude, Mixpanel, Google Analytics) for understanding user behavior and informing design decisions would be beneficial.

CRM & Automation:

• Not directly applicable to the designer role, but awareness of how design integrates with CRM (e.g., Salesforce) and automation platforms in a B2B context is useful.

📝 Enhancement Note: The primary focus for this role is on design tools. While direct experience with analytics or CRM isn't listed as essential, an understanding of how design impacts these areas in a SaaS product is advantageous. Proficiency in Figma is a strong assumption given industry standards.

👥 Team Culture & Values

Operations Values:

• Ownership: Taking responsibility for mobile design from conception to launch and beyond.

• Quality Focus: A commitment to building polished, professional, and user-friendly tools that construction teams are proud to use.

• Problem-Solving: A dedication to tackling complex challenges in a novel industry with innovative solutions.

• User-Centricity: Designing with a deep understanding of the end-users' needs, environments, and workflows.

• Collaboration: Working effectively in a remote-first, asynchronous environment with cross-functional teams.

• Efficiency: Striving for streamlined processes and optimized user experiences.

Collaboration Style:

• Remote-First & Asynchronous: Emphasizes clear written communication, detailed documentation, and efficient use of digital collaboration tools.

• Cross-functional Integration: Designers work closely with Product Managers and Flutter Engineers, contributing to shared goals and providing design expertise throughout the product development lifecycle.

• Feedback-Driven: A culture that encourages giving and receiving constructive feedback to improve designs and processes.

• Direct Communication: With a small, senior team, direct lines of communication and open dialogue are encouraged to resolve issues and drive progress.

📝 Enhancement Note: The company culture values proactivity, a high standard of execution, and collaborative problem-solving. The remote-first aspect means that communication clarity and proactive engagement are paramount.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for Extreme Constraints: Creating intuitive and effective mobile interfaces for users in challenging environments (e.g., construction sites with PPE, poor lighting, intermittent connectivity).

• Bridging Web-Mobile Quality Gap: Elevating the mobile experience to match the high bar set by the web application, which requires significant design effort and attention to detail.

• Defining a New Category: Working in a relatively nascent area of construction technology means navigating ambiguity and helping to define best practices for mobile use in this sector.

• Remote Collaboration: Effectively collaborating with distributed teams across different time zones requires strong communication discipline and proactive engagement.

Learning & Development Opportunities:

• Mobile UX Specialization: Opportunity to become a deep expert in designing for field workers and complex B2B mobile applications.

• Leadership Development: A clear path to grow into a senior or lead role, managing design initiatives and potentially a team.

• Industry Immersion: Gaining firsthand knowledge of the construction industry and its unique operational challenges.

• Design System Contribution: Playing a key role in shaping and expanding a growing design system.

• Strategic Product Input: Direct influence on product strategy and roadmap through close work with leadership.

📝 Enhancement Note: The challenges are significant but directly tied to high-impact growth opportunities. The role is ideal for a designer who thrives on solving difficult problems and wants to make a substantial impact on a product and company.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you designed a mobile feature for users with complex workflows or in challenging environments. What were the key constraints, and how did you address them?" (Focus on your process, user empathy, and problem-solving.)

• "How would you approach ensuring design quality and consistency between our web and mobile applications, especially when mobile has unique constraints?" (Discuss your QA process, design system strategy, and collaboration with engineers.)

• "Given that Diary is a critical revenue driver, how would you prioritize design work and ensure timely delivery while maintaining high quality?" (Highlight your project management, scoping, and collaboration skills.)

Company & Culture Questions:

• "What interests you about Aphex and our mission to transform construction planning?" (Showcase your research on the company and industry.)

• "How do you approach asynchronous communication and collaboration in a remote-first environment?" (Provide examples of your communication strategies.)

• "What are your expectations for working with Product Managers and Flutter Engineers?" (Emphasize collaboration, feedback, and partnership.)

Portfolio Presentation Strategy:

• Focus on Impact: Clearly articulate the business problem your design solved and the resulting impact (e.g., increased adoption, efficiency gains, positive feedback).

• Show, Don't Just Tell: Use visuals, prototypes, and clear explanations to demonstrate your design thinking and execution.

• Highlight Your Role: Be specific about your contributions, especially in collaborative projects.

• Address Constraints: Explicitly discuss the challenges you faced (e.g., technical limitations, user environment) and how your design overcame them.

• Prepare for Q&A: Anticipate questions about your design decisions, trade-offs, and alternative approaches. Be ready to defend your choices with user-centric reasoning.

📝 Enhancement Note: Interview preparation should focus on demonstrating practical problem-solving skills, a deep understanding of mobile design for complex use cases, and a collaborative, remote-ready work ethic. Be prepared to showcase your portfolio with confidence and articulate your design decisions clearly.

📌 Application Steps

To apply for this Product Designer (Mobile) position:

• Submit your application through the provided link on Ashby.

• Tailor Your Portfolio: Curate your portfolio to prominently feature mobile design projects, specifically those involving complex workflows, B2B applications, or challenging user environments. Ensure at least one detailed case study addresses the unique constraints mentioned in the job description.

• Optimize Your Resume: Highlight your 4+ years of product design experience, emphasizing mobile design accomplishments, interaction design skills, and any experience with B2B SaaS, Flutter, or the construction industry. Use keywords from the job description.

• Craft a Compelling Cover Letter: Briefly explain your interest in Aphex, why you are a strong fit for a mobile-focused product designer role in the construction tech space, and how your skills align with the company's mission and values.

• Prepare for the Interview: Familiarize yourself with Aphex's product and the challenges faced by construction professionals. Practice articulating your design process and decision-making for mobile use cases with real-world constraints, and be ready to discuss your portfolio in detail.

⚠️ 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.