Hire me on Upwork

[PORTFOLIO]   [CMS]   [EXPERIMENTATION]   [REBRAND]   [August 2026]

End-to-end product design for platforms at scale.

Jeanniffer Pimentel

By Jeanniffer Pimentel, Product & UX/UI Designer

I get a little obsessed with the projects I work on.

11 years designing inside real content platforms: feature design tested through A/B experiments, brand refreshes translated into scalable systems, and editorial structures built to grow with a team, not just launch and sit still.

Does it move the needle?

312M+

monthly users on a platform I helped design

+280%

CTR increase on a product feature

$155k

earned on Upwork across 38 projects

11+

years of professional design experience

5,315+

hours of tracked client work

100%

Job Success Score on Upwork

+20

countries trusted me with their mission

[CASE STUDY 1/2]

Academia.edu

Description

Two features from the same product. The customization modal was tested through A/B experiments against live traffic: statistically significant results in 48 hours, then rolled out as the winning design, +280% CTR. From the key findings of that research, we redesigned several other pages to A/B test surfacing analytics across different screens, aiming to roll more users into Premium. Those tests are still running, so no results to share yet.

Role

Research → Wireframes → A/B Testing → Rollout

Deliverables

Two product features, one shipped and tested

Tools

Figma, Adobe Suite

Competitive research comparing analytics features across Academia.edu, LinkedIn, Pinterest, YouTube, and TikTok, to spot gaps and opportunities.

Auditing how LinkedIn presents its analytics and Premium upsell, mapping every touchpoint before designing Academia's own flow.

Current pain points on the profile page: a private view shown by default, small numbers linked to analytics buried in the layout. Flagged as an opportunity to redesign the card.

The redesigned Analytics overview: profile views, paper views, and unique visitors surfaced at a glance.

Developer handoff notes for the redesigned activity feed, down to which elements freeze on scroll.

Email campaign notifying researchers when their paper is viewed, driving traffic back into Analytics.

Landing page promoting the citation report, part of the same upsell funnel.

[CASE STUDY 2/2]

Codesmith

Description

A brand refresh translated into a full website redesign: 13+ pages and one consistent design system, built with a cross-disciplinary team.

Role

Research → Wireframes → Design System → Rollout

Deliverables

13+ pages, one new system

Tools

Figma, Adobe Suite, Canva, Google Slides

Before: the old site felt corporate and static, disconnected from Codesmith's community.

Before: the old events page, part of the initial audit.

What can I build for you?

End-to-End Product Design

From research and flows to high-fidelity interaction, one person across the whole cycle.

Product & UX/UI Design

Wireframes through high-fidelity prototypes, grounded in user research and built to hold up at scale.

Design Systems

Reusable components, tokens, and documentation that keep a product consistent as it grows.

UX Research & Testing

User interviews, usability testing, and A/B experiments that turn assumptions into data-backed decisions.

CMS & Website Design

Webflow, Framer, WordPress, HubSpot. Built to scale.

Rebrand & Visual Systems

A full brand refresh translated into a scalable system across every touchpoint.

Prototyping & Handoff

Interactive Figma prototypes and developer-ready specs that keep design and engineering aligned.

My Stack

(always growing)

FigmaAdobe SuiteHubspotWebflowFramerHTMLCSSJavaScriptGitHubClaudeCursor

Always learning.

Accessibility: How to Design for All certificate

Accessibility: How to Design for All

Interaction Design Foundation · 2025

Information Visualization certificate

Information Visualization

Interaction Design Foundation · 2024

Figma Advanced Prototyping certificate

Figma Advanced Prototyping

Figma · 2023

Kind words from kind people

Jeanniffer is an ideal Graphic Designer. She was initially hired as a part-time contractor and quickly became an integral part of our team, leading to a promotion to full-time. She is smart, easy to work with, kind, and dedicated while extremely professional, proactive and a design genius! She elevated our branding to another level. Jeanniffer, our doors will always be open to you and you'll always be a part of our community. Go shine in other organizations - we're cheering for you!

Allana Rocha

Chief of Staff & Operations Lead at digitalundivided

Working with Jeanniffer has been an absolute pleasure! She is incredibly proactive, bringing fresh ideas, insightful questions, and creative solutions to every aspect of our website design. Her communication is top-notch, always clear, responsive, and detail-oriented. Jeanniffer consistently goes above and beyond, ensuring that our vision is met. If you're looking for a designer who is talented, I highly recommend Jeanniffer. Looking forward to collaborating again in the future!

Alina Vasile

Director of Product and Growth at Codesmith

Jeanniffer is fabulous and I will be seeking her help for future projects. I am a health and wellness coach, a business owner and some of the things I value A TON is transparency and integrity. She has both in surplus! Clear communication, no surprises and very trustworthy. She is a great listener and truly understood what I wanted to visually communicate. She's also very cooperative, open-minded and easy to get along with. I completely trusted letting go and giving her full creative license to do her magic. I am so thankful I found her!!

Sharon Aldeguer

CEO at Nom Nom Fit

Simply one of the best freelance experiences I have had. Jeanniffer grasped what I wanted from a refresh of my website almost immediately. She made great suggestions and her redesign was almost perfect on the first pass. Only very slight modification was needed. Previous projects have had to go through several rounds of modification and explanation, not this project.

David Boyce

Conceptual Artist

It was an absolute pleasure working with Jeanniffer. She took the time to really understand my needs, communicated clearly throughout the project, and delivered everything within the promised timeframe. Her responsiveness and attention to detail made the process seamless, and the final result exceeded my expectations. I highly recommend Jeanniffer to anyone looking for a reliable and talented professional. I would be happy to work with her again!

Yvette Harvey

CEO @ Alta Lux Adventures

Jeanniffer was absolutely amazing and made the process so seamless on my first ebook. She took creative control and the end result was much better than I had hoped. I am so grateful I found Jeanniffer and will use her for any future projects + will definitely recommend to others! Thank you!!

Amanda Butler

Personal Trainer

Let's build something together.

A full rebrand, a CMS-driven redesign, or an ongoing partnership: if it's worth building well, let's talk it through.

Hire me on Upwork →