[PORTFOLIO] [CMS] [EXPERIMENTATION] [REBRAND] [August 2026]
End-to-end product design for platforms at scale.

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)
Figma
Adobe Suite
Hubspot
Webflow
Framer
HTML
CSS
JavaScript
GitHub
Claude
CursorAlways learning.

Accessibility: How to Design for All
Interaction Design Foundation · 2025

Information Visualization
Interaction Design Foundation · 2024

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 →