I am a Digital Product Designer getting my hands dirty with leadership, research, strategy, Figma, analytics...
Focused on the dynamic intersection of product design and product management.
I am also pursuing an M.Sc. in Production Engineering from USP, researching digital product management best practices. Recently, I have finished a Professional Certificate in Strategic Management from Wharton, and an Executive MBA from FGV.
Latest works
Testimonials
Lucas Ramalho (Design Manager), former Design Manager at Juntos
During his time with us, Guarabyra showed rapid growth: he started as a contractor, was soon hired full-time, and quickly took on greater responsibilities, making a clear impact on the team.
He combines strong technical expertise in design with a strategic business mindset, turning research into tangible results such as higher conversion rates, stronger customer loyalty, and improved user experiences. His approach was essential to the maturity of our internal design practices.
Beyond his technical skills, he is collaborative, approachable, good-humored, and always willing to share knowledge—a professional who raised the quality of our deliverables and decisively contributed to the team’s development.
Alex Takehissa (Senior UX Researcher), former co-worker at Juntos
Guarabyra is a highly talented designer with a sharp creative eye and a deep understanding of user-centered design best practices.
What truly sets him apart is his ability to conduct meaningful user research and translate insights into practical, intuitive, and impactful solutions.
Another standout quality is his consistently positive energy—always collaborative, proactive, and generous with ideas. He uplifts the team dynamic and contributes to a stronger, more connected work environment.
Erika Silva (Senior Product Designer), former co-worker at Juntos
I had the pleasure of working closely with Lucas on our product design team, where he consistently demonstrated both strong expertise and a collaborative spirit.
His proactive attitude, attention to detail, and commitment to business and user impact helped us deliver meaningful results.
Beyond his technical knowledge, Lucas is also an incredible teammate—easy to work with, open to feedback, and always ready to share what he knows.
I truly enjoyed working with him and would gladly do so again in the future.
Layane Couto (Senior Product Designer), former co-worker at Juntos
I worked with Lucas Guarabyra for several years and quickly realized his product design skills were a reference point for the team.
Lucas works in a highly strategic way, demonstrating deep knowledge in user research, interface creation, and digital product design.
He also stood out for proposing experiments to validate hypotheses and for his autonomy in measuring results through data tools—factors that drove rapid and consistent product evolution.
All these aspects, combined with his positive energy and teamwork, make Lucas Guarabyra a highly recommendable professional.
Luis Arantes (Senior Data Analyst), former co-worker at Juntos
I had the opportunity to work with Guarabyra on some research projects and was very impressed by his versatility and sharp ability to seek out relevant information to support deliverables.
He consistently added great value to the execution of projects, bringing well-founded solutions with a strategic perspective.
In addition, he’s an excellent person to work with—collaborative, approachable, and open to dialogue—which makes teamwork even more productive and enjoyable.
Renata Borges (Senior Product Designer), former co-worker at Juntos
I worked with Lucas Guarabyra for nearly four years at Juntos Somos Mais, and throughout that time, he consistently stood out as a technical and strategic reference within the design team.
Lucas has an analytical and precise eye for decision-making, always putting the user at the center of the process. His ability to connect research, interface design, and product vision makes him a complete professional who directly contributes to the evolution of projects.
In addition, his proactivity in proposing experiments, validating hypotheses, and tracking results through data demonstrates a rare level of maturity among product designers.
With his dedication, constant curiosity, and positive energy day to day, Guarabyra became a key part of the team—a professional I wholeheartedly recommend and deeply admire.
Tainã Carneiro (UX Writer), former co-worker at Juntos
I had the pleasure of working with Lucas Guarabyra between 2022 and 2023, a period during which I learned a lot alongside him.
Beyond being an extremely talented designer, Lucas always demonstrated a broad business vision, contributing not only with creative solutions but also strategic ones.
He was a key partner in my professional growth, supporting our Writing team in many moments, guiding research and tests, and helping us view daily challenges more critically and maturely.
Guarabyra is the kind of professional who truly adds value to a team—with genuine collaboration, constant exchange, and a sharp eye for the impact of every delivery. Without a doubt, he’s a colleague who made a real difference in my journey!
Work process
0. Product Design and Management
1. Discovery
Where everything begins: understanding users, businesses, and the product ecosystem.
- User research: interview users, analyze behaviors, and uncover pain points.
- Business research: understand goals, strategies, and metrics critical to the business.
- Product research: analyze product usage data to find problems and opportunities.
- Market research: benchmark direct and indirect competitors for insights.
2. Solution
Defining the problem and generating impactful ideas.
- Define and prioritize problems: use metrics to identify the most critical issues.
- Generate solutions: brainstorm ideas, document them, and define success metrics.
- Strategize: look to the horizons and understand if the solutions fit the big picture;
- Prioritize ideas: ensure alignment with user needs, business goals, and technical feasibility.
3. Validation
Testing ideas before building.
- Create low-fidelity prototypes: build simple mockups to validate key concepts.
- Ensure feasibility: collaborate with developers to ensure technical viability.
- Test with users: define success metrics, gather feedback, and iterate as needed.
4. Production
Turning designs into reality.
- Document requirements: maintain an up-to-date product requirement document and scope of work.
- Develop high-fidelity prototypes: build detailed prototypes to guide development.
- Conduct usability testing: test the interface with users and teammates to address issues early.
- Handoff design: provide detailed specifications, videos, and annotations for developers.
5. Development
Bringing the product to life.
- Support coding: stay accessible to answer developer questions.
- Track events: create a list of key interactions for analytics.
- Quality assurance: verify design accuracy, performance, and responsiveness across devices.
6. Go live
Celebrate and communicate the launch.
- Announce the release: use email, social media, and internal channels to spread the word.
7. Follow-up
Continuous improvement after launch.
- Update documentation: revise flows, journeys, and other resources.
- Evaluate success: analyze metrics against your original goals to inform future iterations.
Experience
Digital Product Management Researcher (USP | Hybrid | Feb/25 to nowadays)
- Researching digital product management best practices and strengthening my innovation management, product management, information management, machine learning, agile project management, research methodology, and data science skills.
Digital Product Design Lead (Juntos | Remote | May/23 to Jan/2025)
- Led a team of 5, designing a B2B e-commerce and loyalty program, improving user experience and aligning with business strategy.
- Facilitated agile processes and workshops, managing cross-functional collaboration.
- Conducted usability tests, A/B testing, and user research to drive data-informed design decisions.
- Analysing whether a mobile app is necessary or pointless;
- Chasing churn: post-sales metrics and triggers explored.
- Using BPM to improve a loyalty program’s point distribution process (soon).
Digital Product Design Lead (Juntos | Remote | May/23 to Jan/2025)
- Led a team of 5, designing a B2B e-commerce and loyalty program, improving user experience and aligning with business strategy.
- Facilitated agile processes and workshops, managing cross-functional collaboration.
- Conducted usability tests, A/B testing, and user research to drive data-informed design decisions.
- Analysing whether a mobile app is necessary or pointless;
- Chasing churn: post-sales metrics and triggers explored.
- Using BPM to improve a loyalty program’s point distribution process (soon).
Senior Digital Product Designer (Juntos | Remote | August/21 to May/23)
Highlights
- Conducted heuristic evaluations, user interviews, and data analysis to refine digital products, enhancing user engagement.
- Improved user satisfaction by implementing user-centered design strategies and testing initiatives.
Related cases
Senior Digital Product Designer (Avenue Code | Remote | March/21 to August/21)
Highlights
- Led A/B testing and usability evaluations to improve product performance.
- Delivered intuitive, data-driven digital product designs that enhanced customer journeys and satisfaction.
Product Manager and Designer (Beliive | Remote | November/19 to March/21)
Highlights
- Reduced user research recruitment time by 80% by creating an efficient testers bank;
- Prioritized strategic backlogs using insights from user research and data analysis;
- Facilitated agile workshops, aligning design and development teams for faster delivery
cycles.
Previously
- Product Designer (W. Mitty | Remote | September/17 to August/21)
- Digital Product Designer (Liva | Remote | June/18 to November/19)
- Interface Designer (Profite | Rio de Janeiro | January/18 to June/18)
- Product Designer (SmartSERP | Remote | July/16 to September/17)
- Designer (Freelancer | Remote | January/12 to September/17)
- Design Intern (Nibo | Rio de Janeiro | July/15 to April/16)
Education
M.Sc. in Digital Product Development (USP | 2025 to 2027)
- Product Management;
- Artificial Intelligence;
- Qualitative Research Methods;
- Quantitative Research Methods;
- Technology Management;
- Agile Project Management;
- Roadmapping;
- Economics.
Professional Certificate in Strategy Management (Wharton | 2023 to 2024)
Executive MBA in Business Management (FGV | 2022 to 2024)
- Accounting;
- Business Analytics;
- Business Process Management;
- Business Strategy;
- Marketing Strategy;
- Business Economy;
- Finance;
- ESG;
- Costs Management;
- Project Management;
- Service Management;
- Leadership and Team Management;
- Conflict Management;
- Supply Chain Management;
- Digital Transformation.