UI/UX Designer (Focus on UI, with UX experience)

📍 Job Overview

Job Title: UI/UX Designer (Focus on UI, with UX experience)

Company: Happy Koala LLC

Location: Lisbon, Portugal

Job Type: Full-Time Contractor

Category: Digital Design & User Experience

Date Posted: 2026-08-17

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

Remote Status: Fully Remote

🚀 Role Summary

• Drive the visual appeal and user intuitiveness of Happy Mammoth's digital presence, focusing on website product pages and marketing campaign creatives.

• Leverage a strong UI design craft, complemented by a solid UX foundation, to translate business objectives and creative briefs into high-impact digital assets.

• Optimize the customer journey and conversion rates through thoughtful design solutions that balance aesthetic quality with functional user experience.

• Ensure brand consistency and enhance user engagement across all digital touchpoints, from desktop to mobile interfaces.

📝 Enhancement Note: This role is specifically for a contractor position, emphasizing full-time commitment but with the flexibility of remote work and flexible hours. The focus is heavily on UI execution with a necessary understanding of UX principles to drive conversion.

📈 Primary Responsibilities

• Design and iteratively improve product pages to enhance visual appeal, clarity, and navigational ease, directly impacting user engagement and conversion rates.

• Develop compelling campaign creatives that effectively communicate brand messaging and drive desired user actions, aligning with marketing objectives.

• Conduct redesigns of existing website sections, proactively identifying opportunities to elevate the user experience, boost engagement metrics, and improve conversion funnels.

• Transform initial briefs, rough concepts, and campaign ideas into polished, high-fidelity designs that meet both aesthetic and functional requirements.

• Apply UX knowledge to strategically position critical information, calls-to-action (CTAs), trust elements, and benefit statements to maximize conversion potential.

• Architect intuitive user journeys for new page designs, ensuring a seamless and friction-free flow from initial interaction to desired outcome.

• Maintain and enforce visual design consistency across the website and various campaign experiences to reinforce brand identity.

• Adapt and rapidly iterate on designs based on feedback from stakeholders and evolving business priorities, ensuring agility in the design process.

• Ensure all designed interfaces are fully responsive and optimized for a consistent, high-quality user experience across desktop and mobile devices.

📝 Enhancement Note: The responsibilities highlight a blend of creative execution and strategic thinking, with a strong emphasis on conversion optimization. The role requires the designer to not only create visually appealing interfaces but also to understand the underlying user behavior that drives business results.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a Bachelor's degree in Graphic Design, Interaction Design, Human-Computer Interaction, or a related field is often preferred for mid-level design roles. A strong portfolio can often substitute for formal education.

Experience: 2-5 years of proven experience in UI/UX design, with a demonstrable track record in digital and web design. Experience in B2C/e-commerce or Direct-to-Consumer (DTC) design is highly valued, with a bonus for candidates with experience in the health or supplements industry.

Required Skills:

• Proficient in UI design principles with exceptional attention to detail and a high standard for visual quality.

• Demonstrable experience in e-commerce or DTC brand design, crucial for understanding conversion-driven user flows.

• Solid understanding of UX principles and conversion-optimized design methodologies.

• Ability to effectively balance strong visual aesthetics with user experience best practices and overarching business goals.

• Proficiency in conversion principles and the impact of design on user behavior and decision-making.

• Experience designing responsive websites that perform optimally on both desktop and mobile platforms.

• Advanced proficiency in Figma for design, prototyping, and collaboration.

• Aptitude for taking a concept or rough brief and developing it into a polished, well-structured, and thoughtful design. Preferred Skills:

• Experience within the health, wellness, or supplement industry.

• Familiarity with user journey mapping and wireframing tools beyond Figma.

• Understanding of basic front-end development principles (HTML/CSS) to better collaborate with developers.

• Experience with A/B testing design variations to optimize performance.

• Familiarity with design systems and component libraries.

📝 Enhancement Note: The emphasis on Figma is critical. Candidates should be prepared to showcase their proficiency and workflow within this tool. The preference for B2C/e-commerce/DTC experience, especially in health, indicates the company's market focus and the type of design challenges the candidate will face.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A curated collection of digital and web design work that clearly demonstrates expertise in both UI and UX.

• Specific case studies showcasing e-commerce or DTC projects, highlighting your role in driving conversion rates and improving user experience.

• Examples of responsive design solutions for both desktop and mobile platforms.

• Visuals and descriptions of designs that illustrate a strong grasp of conversion optimization principles and user psychology.

• Prototypes or interactive mockups created in Figma to showcase user flows and interactions. Process Documentation:

• Showcase your design process from brief to final deliverable, detailing research, ideation, wireframing, prototyping, and user testing (if applicable).

• Provide examples of how you've translated business requirements and user needs into effective design solutions.

• Demonstrate how you incorporate feedback and iterate on designs to achieve optimal business impact.

• Explain your approach to ensuring visual consistency and brand adherence across different design projects.

📝 Enhancement Note: The portfolio is paramount for this role, serving as the primary evidence of a candidate's capabilities. It must clearly articulate not just the visual output but the strategic thinking and problem-solving process behind it, particularly concerning conversion optimization in an e-commerce context.

💵 Compensation & Benefits

Salary Range: As a contractor role based in Lisbon, Portugal, and considering the mid-level experience requirement (2-5 years), a competitive hourly rate or equivalent full-time salary would be in the range of €25,000 - €40,000 annually, or €15 - €25 per hour. This estimate is based on industry benchmarks for UI/UX designers in Lisbon, factoring in the remote nature and contractor status, and the specific skills required.

Benefits:

• Strong Salary Package: Competitive compensation commensurate with skills and experience.

• Paid Holidays: Generous paid time off for rest and rejuvenation.

• Work from Anywhere: The flexibility to work remotely from any location, offering ultimate freedom and work-life integration.

• Flexible Working Hours: Ability to manage your own schedule, accommodating personal productivity peaks and preferences.

• Opportunities for Growth: Access to resources such as free books and courses to support continuous learning and skill development.

• Dynamic Work Environment: Exposure to a fast-paced, innovative, and global team culture.

• Make a Difference: Opportunity to contribute to a mission focused on improving customer health and well-being.

Working Hours: This is a full-time contractor role, typically requiring approximately 40 hours per week. While flexible, candidates must be available to work during EU hours (GMT) to facilitate collaboration with the international team.

📝 Enhancement Note: The salary range provided is an estimate for a contractor role in Lisbon, Portugal, adjusted for the required experience and the fully remote, flexible working conditions. The specific compensation will depend on the candidate's qualifications, experience, and negotiation. The benefits listed are a significant draw, emphasizing flexibility and personal growth.

🎯 Team & Company Context

🏢 Company Culture

Industry: Happy Koala LLC operates within the rapidly expanding natural food tech industry, specializing in gut health foods, digestive aids, and microbiome-focused supplements. This places them at the intersection of health, wellness, and technology, with a strong emphasis on consumer-packaged goods (CPG) and direct-to-consumer (DTC) e-commerce strategies.

Company Size: Happy Koala LLC is described as a "rapidly expanding" company with a presence in the US, Australia, and Europe. This suggests a growing, agile organization, likely with a lean but dynamic team structure. For operations professionals, this can mean opportunities for significant impact and the ability to shape processes, alongside the potential for rapid career advancement, but also a need for adaptability and comfort with ambiguity.

Founded: While the founding date isn't explicitly stated, the company's expansion across multiple continents and its focus on natural food tech and e-commerce indicate a modern, growth-oriented business.

Team Structure:

• The operations team is likely composed of individuals skilled in digital marketing, e-commerce management, product development, and potentially supply chain/logistics, all supporting the DTC model.

• Reporting structures are expected to be relatively flat given the remote and dynamic nature of the company, fostering direct communication and collaboration.

• Cross-functional collaboration is essential, with the UI/UX Designer working closely with marketing, product, and e-commerce teams to ensure a cohesive and effective customer experience. Methodology:

• Data-Driven Decision Making: The company's focus on health transformations and vibrant living implies a commitment to understanding customer needs and outcomes through data.

• Agile Design & Development: Rapid iteration and adaptation based on feedback are key, especially in a fast-paced e-commerce environment.

• Customer-Centric Approach: Designing for lasting health transformations requires a deep understanding of customer journeys and motivations.

Company Website: https://store.happymammoth.com/

📝 Enhancement Note: The company's industry and mission are central to the UI/UX Designer role. Designs will need to resonate with consumers seeking health and wellness solutions, emphasizing trust, efficacy, and a positive transformation. The e-commerce focus means conversion optimization is not just a desirable skill but a core requirement.

📈 Career & Growth Analysis

Operations Career Level: This UI/UX Designer role is positioned at a Mid-Level (2-5 years of experience). This implies a need for a candidate who can work independently on design tasks, take ownership of projects, and contribute strategically to design solutions, rather than requiring extensive supervision. They are expected to execute high-quality UI craft with a foundational understanding of UX principles, capable of translating complex briefs into polished designs.

Reporting Structure: As a remote contractor, the UI/UX Designer will likely report to a Design Lead, Marketing Manager, or a Head of Digital Product. Direct collaboration with marketing and e-commerce teams is expected, meaning the designer will interact with various stakeholders to gather requirements and present designs.

Operations Impact: The UI/UX Designer's impact is directly tied to revenue generation and customer engagement. By designing visually appealing, intuitive, and conversion-optimized websites and campaign creatives, they play a crucial role in:

• Increasing website conversion rates (e.g., purchases, sign-ups).

• Enhancing customer satisfaction and brand loyalty.

• Improving the overall effectiveness of marketing campaigns.

• Contributing to the company's growth and market presence in the competitive health tech sector. Growth Opportunities:

• Skill Specialization: Deepen expertise in UI design for e-commerce, conversion rate optimization (CRO), or specific areas of UX research.

• Cross-Functional Exposure: Gain experience working with diverse teams across marketing, product development, and potentially content creation, broadening understanding of the business.

• Leadership Potential: With proven success and contributions, opportunities may arise to lead design initiatives, mentor junior designers, or contribute to the development of design systems.

• Learning & Development: The company explicitly offers free books and courses, signaling a commitment to employee growth and upskilling in relevant design and e-commerce trends.

📝 Enhancement Note: The "contractor" status might influence long-term career trajectory within the company, but the described responsibilities and growth opportunities suggest a role with significant learning potential and the chance to build a strong portfolio in a thriving industry.

🌐 Work Environment

Office Type: This is a fully remote position, meaning there is no central office requirement. The "office" is wherever the contractor chooses to work, whether it's a home office, co-working space, or cafe. This offers maximum flexibility.

Office Location(s): While the role is remote, the requirement for availability during EU hours (GMT) suggests that the company has a significant operational or team presence within the European time zone, even if the team is distributed globally. The company headquarters are likely in the US, with European operations supporting sales and marketing efforts.

Workspace Context:

• Autonomy and Self-Management: Contractors are expected to manage their own workspace, ensuring it is conducive to productive design work and reliable internet connectivity.

• Digital Collaboration Tools: The work environment relies heavily on digital collaboration tools (e.g., Slack, Zoom, Figma, project management software) for communication, design handoffs, and team interaction.

• Global Team Interaction: Opportunities to collaborate with a diverse, international team, fostering a rich exchange of ideas and perspectives.

Work Schedule: The role offers flexible working hours, allowing the contractor to set their own schedule. However, mandatory availability during EU hours (GMT) is crucial for real-time collaboration, meetings, and timely feedback exchange with team members and stakeholders in Europe.

📝 Enhancement Note: The "Work from Anywhere" benefit is a key differentiator. However, the "EU hours (GMT)" requirement is a critical constraint that dictates the practical application of flexible working hours, requiring significant overlap with European time zones.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your CV and portfolio to assess suitability against the core requirements, with a strong emphasis on visual quality, relevant experience (e-commerce/DTC), and Figma proficiency.

• Portfolio Presentation/Interview: A dedicated session where you present your portfolio, discussing key projects, your design process, how you've driven conversion, and your problem-solving approach. Be prepared to articulate the "why" behind your design decisions.

• Skills Assessment/Design Challenge: Potentially a small design exercise or case study related to their product pages or marketing campaigns to evaluate your practical design skills, speed, and ability to translate a brief into a solution within a given timeframe.

• Team/Cultural Fit Interview: A discussion with potential team members or hiring managers to assess your communication style, collaboration skills, and alignment with Happy Mammoth's dynamic and remote work culture.

Portfolio Review Tips:

• Curate Strategically: Select 3-5 of your strongest projects that best showcase your UI craft, UX thinking, and relevant e-commerce/DTC experience. Prioritize projects with measurable results (e.g., increased conversion rates, improved engagement).

• Tell a Story: For each project, clearly outline the problem, your role, the process you followed (research, ideation, design, iteration), the tools used (especially Figma), and the outcomes achieved. Quantify results whenever possible.

• Highlight Conversion Focus: Explicitly demonstrate how your designs addressed business goals and influenced user behavior towards conversion. Use visual callouts for CTAs, trust signals, and persuasive content placement.

• Showcase UI Excellence: Ensure your portfolio visuals are high-resolution, well-presented, and demonstrate your attention to detail, typography, color theory, and overall aesthetic quality.

• Figma Proficiency: Be ready to discuss your Figma workflow, including how you use components, auto layout, prototyping, and collaboration features.

Challenge Preparation:

• Understand the Business: Familiarize yourself with Happy Mammoth's products, target audience, and brand messaging. Review their current website to identify areas for potential improvement.

• Focus on Conversion: If given a design challenge, prioritize elements that drive conversions – clear CTAs, compelling product descriptions, social proof, and trust signals.

• Demonstrate Process: Even in a short exercise, articulate your thought process. Think about the user journey, potential pain points, and how your design addresses them.

• Be Ready for Feedback: Approach any design challenge or interview discussion with an open mind, ready to receive and incorporate feedback constructively.

📝 Enhancement Note: The interview process will heavily rely on your portfolio. Candidates should prepare a concise narrative for each project, emphasizing their ability to deliver visually stunning and conversion-optimized designs within an e-commerce context. The "EU hours (GMT)" requirement means interview scheduling will need to accommodate this.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: This is the core design tool, essential for UI design, prototyping, and collaboration. Proficiency is a strict requirement.

• Adobe Creative Suite (Photoshop, Illustrator): Useful for asset creation, image editing, and potentially more complex graphic design tasks.

• Prototyping Tools: While Figma has robust prototyping capabilities, familiarity with other tools like InVision might be beneficial for broader project contexts.

Analytics & Reporting:

• Google Analytics: Understanding how to interpret GA data to inform design decisions and measure the impact of design changes on user behavior and conversions.

• Heatmap & Session Recording Tools (e.g., Hotjar, Crazy Egg): Familiarity with tools that provide visual insights into user interaction on the website.

• A/B Testing Platforms (e.g., Google Optimize, Optimizely): Knowledge of how design variations are tested and data is analyzed to optimize performance.

CRM & Automation:

• While not directly a design tool, understanding how CRM and marketing automation platforms (e.g., HubSpot, Mailchimp, Klaviyo) influence customer journeys and campaign design can be beneficial. Designers may need to create assets for email campaigns or landing pages managed by these systems.

📝 Enhancement Note: Figma proficiency is non-negotiable. While the role is primarily design-focused, an understanding of analytics and conversion tracking tools will significantly strengthen a candidate's application, as it demonstrates an ability to measure and improve the business impact of their designs.

👥 Team Culture & Values

Operations Values:

• Customer-Centricity: A deep focus on understanding and serving the needs of customers, aiming to improve their health and well-being through high-quality products and user experiences.

• Innovation & Creativity: Encouraging novel ideas and approaches in product development, marketing, and design to stand out in a competitive market.

• Data-Driven Approach: Relying on insights from data and analytics to inform decisions, measure success, and drive continuous improvement in all aspects of the business.

• Efficiency & Agility: Embracing fast-paced workflows and adapting quickly to market changes and customer feedback, crucial for a growing e-commerce company.

• Impact & Purpose: A strong sense of mission to make a tangible difference in customers' lives by empowering them towards better health.

Collaboration Style:

• Remote & Asynchronous: Effective communication and collaboration across different time zones and locations, utilizing digital tools for seamless interaction.

• Cross-Functional Integration: Close working relationships between design, marketing, product, and other departments to ensure cohesive strategies and user experiences.

• Feedback-Oriented: A culture that encourages constructive feedback to drive design quality and continuous improvement.

• Global Perspective: Valuing diverse viewpoints and experiences from an international team, enriching creative output.

📝 Enhancement Note: The company's values emphasize a mission-driven, agile, and customer-focused approach. Designers are expected to be proactive, collaborative, and comfortable working in a remote, globally distributed team environment.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing UI Polish with UX Functionality: Consistently delivering designs that are both visually stunning and highly effective in driving conversions and user satisfaction.

• Adapting to Evolving E-commerce Trends: Staying abreast of the latest design trends, user behaviors, and technological advancements in the fast-paced e-commerce and health tech sectors.

• Remote Collaboration Dynamics: Effectively communicating and collaborating with a distributed team across different time zones, ensuring alignment and timely feedback.

• Translating Complex Health Concepts: Designing interfaces that clearly communicate the benefits of health and supplement products to a diverse consumer base.

Learning & Development Opportunities:

• Advanced UI/UX Skills: Deepening expertise in areas like conversion rate optimization (CRO), advanced prototyping, accessibility standards, and user research methodologies.

• E-commerce & DTC Specialization: Gaining in-depth knowledge of e-commerce best practices, customer journey mapping for online sales, and DTC marketing strategies.

• Industry Knowledge: Expanding understanding of the health, wellness, and supplement industries, enabling more informed and impactful design solutions.

• Mentorship and Leadership: Potential to grow into a more senior or lead design role, mentoring junior designers and influencing the company's design strategy.

📝 Enhancement Note: The challenges presented are typical for a growing e-commerce business focused on health. The growth opportunities are significant, offering the chance to become a specialist in a high-demand niche within the design field.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you significantly improved conversion rates on a product page or landing page through design. What was your process, and what were the results?" (Focus on quantifiable impact and your strategic approach.)

• "How do you balance aesthetic appeal with user experience and business goals in your designs?" (Emphasize your decision-making process and how you prioritize different factors.)

• "Walk us through your process for designing a new website feature or campaign creative from a rough brief." (Detail your steps, from understanding the brief to final delivery, highlighting your UX considerations.) Company & Culture Questions:

• "What interests you about Happy Mammoth's mission and products?" (Show genuine interest in the health and wellness space and their approach.)

• "How do you approach working in a remote, globally distributed team environment?" (Highlight your communication skills, proactivity, and experience with remote collaboration tools.)

• "How do you ensure your designs align with brand identity and contribute to overall business objectives?" (Connect your design work to the company's goals and brand values.) Portfolio Presentation Strategy:

• Structure Your Narrative: For each project, clearly state the problem, your specific role and contributions, your design process, the tools used (especially Figma), and the measurable outcomes.

• Quantify Impact: Wherever possible, use data and metrics to demonstrate the success of your designs (e.g., X% increase in conversion, Y% reduction in bounce rate).

• Showcase Figma Skills: Be prepared to discuss your workflow in Figma, demonstrating your proficiency with its features for design, prototyping, and collaboration.

• Focus on Conversion Optimization: Explicitly call out how your design choices were aimed at improving conversion rates and user engagement in e-commerce contexts.

• Be Ready for Feedback: Present your work confidently but be open to constructive feedback and questions about your design decisions.

📝 Enhancement Note: Interviewers will be looking for a candidate who not only has strong UI skills but also a strategic understanding of how design impacts business metrics, particularly conversions in an e-commerce setting. Demonstrating familiarity with the health/wellness industry is a plus.

📌 Application Steps

To apply for this UI/UX Designer position:

• Submit your application through the provided application link on the Happy Mammoth careers portal.

• Portfolio Customization: Ensure your portfolio is tailored to highlight your strongest UI/UX work, with a specific emphasis on e-commerce, DTC, and conversion-optimized designs. Showcase at least one project that demonstrates your ability to translate a concept into a polished, high-impact digital asset.

• Resume Optimization: Update your resume to prominently feature keywords such as "UI/UX Designer," "Figma," "E-commerce Design," "DTC," "Conversion Optimization," "Responsive Web Design," and any relevant experience in the health or supplements industry. Quantify achievements where possible.

• Portfolio Walkthrough Practice: Prepare a concise and compelling presentation of your portfolio, focusing on 2-3 key projects. Practice articulating your design process, your role, and the business impact of your work, especially how your designs led to improved conversions.

• Company Research: Thoroughly research Happy Mammoth, their products, target audience, and current website. Understand their mission to "empower clients to embrace lasting health transformations." This will help you tailor your application and articulate your fit with their brand and values.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and industry-standard assumptions. All details should be verified directly with Happy Koala LLC (Happy Mammoth) before making application decisions. Pay close attention to the contractor status and EU hours requirement.