Freelance User Researchers in BarcelonaFreelance User Researchers in Barcelona
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Barbara Parreira's avatar
Barbara Parreira
Barcelona, Spain
I build apps, launch products and grow revenue.
New to Contra
I build apps, launch products and grow revenue.
Cover image for Redesigned the full courier app
Redesigned the full courier app for Glovo, transforming a complex multi-delivery workflow into a simple, intuitive experience used across 14 countries. The product handled real-time task assignment, route navigation, and delivery status across millions of daily deliveries. The project started with user research across multiple markets to understand how couriers were actually working and where the flow was breaking down. From that I defined the product direction, redesigned the full UX from task assignment to delivery completion, and coordinated 14 engineers across 3 squads from discovery to launch. Reduced average task completion time by 3 seconds per delivery, generating €2K per month in operational efficiency gains.
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Cover image for Led the go-to-market and product
Led the go-to-market and product execution for e-invoicing launched simultaneously across Germany and Spain, meeting a hard EU regulatory deadline. Defined the value proposition for non-expert users navigating complex tax and invoicing requirements, redesigned the onboarding flow to reduce time to first value, and unified the payment architecture across both markets. Contributed to 8% customer acquisition growth.
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Cover image for Lumen AI School is an
Lumen AI School is an academy teaching kids how to use and understand AI tools. I built the full product and executed the go-to-market from scratch. On the growth side I designed and ran a 5-day acquisition sprint to get first students fast. The strategy prioritised the highest-converting channels first: personalised outreach to old leads, WhatsApp messages to the personal network, Facebook parent groups, a demo event on Sympla, and direct emails to school directors. All five converted within the first week without any paid advertising. Longer term channels, like Instagram, YouTube, SEO, and formal parent workshops were built in parallel as the student base grew.
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Cover image for NutriPup is an AI-powered mobile
NutriPup is an AI-powered mobile app that helps dog owners feed their dogs with confidence, with personalised nutrition guidance at a fraction of the cost of a veterinary nutritionist. Started with user research across 312 dog owners in Brazil and Spain to validate the problem and define the value proposition. Designed the full product experience, built and shipped the app to both the App Store and Google Play in 3 weeks, with in-app purchase integration approved on both platforms.
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User Researcher(1)
Adrian Ortinez · UX's avatar
Adrian Ortinez · UX
Barcelona, Spain
Rapid Prototyping for B2B SaaS · MVP-driven UX / UI Designer
Rapid Prototyping for B2B SaaS · MVP-driven UX / UI Designer
Cover image for GUZZU [web3 · Blockchain]
GUZZU [web3 · Blockchain]
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Cover image for Cellect [Energy storage]
Cellect [Energy storage]
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17
Cover image for NEOM [the Line · Real Estate]
NEOM [the Line · Real Estate]
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25
Cover image for MintKnight [NFT · Blockchain]
MintKnight [NFT · Blockchain]
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9
User Researcher(1)
Raden Tonev's avatar
Raden Tonev
Barcelona, Spain
Transformative Product Design. Done at Speed.
Transformative Product Design. Done at Speed.
Cover image for Taking ZeroedIn's People Analytics Platform to The Next Level
Taking ZeroedIn's People Analytics Platform to The Next Level
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5
Cover image for OptimalWork
OptimalWork
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1
Cover image for Astrolabe ML Infrastructure Platform
Astrolabe ML Infrastructure Platform
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2
Cover image for The Perfect Rug E-commerce Site
The Perfect Rug E-commerce Site
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2
User Researcher(1)
Denisse Maturin's avatar
Denisse Maturin
Barcelona, Spain
UI/UX Designer in Barcelona, skilled in Web & App
UI/UX Designer in Barcelona, skilled in Web & App
Cover image for TagAlong Memories - Mobile App
TagAlong Memories - Mobile App
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Cover image for Roadies Labs - Crafting a Seamless NFT Marketplace Landing Page
Roadies Labs - Crafting a Seamless NFT Marketplace Landing Page
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35
Cover image for Connou - Redesigning the website into a B2B2C Experience
Connou - Redesigning the website into a B2B2C Experience
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9
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User Researcher(1)
Fabian Leone's avatar
Fabian Leone
Barcelona, Spain
Problem solver designer, specialized in user experience.
Problem solver designer, specialized in user experience.
Cover image for Amsterdam Store
Amsterdam Store
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Cover image for Fintech Cryptocurrency Project
Fintech Cryptocurrency Project
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5
Cover image for Multimedia Design
Multimedia Design
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Cover image for Ecologist Ecommerce from Amsterdam
Ecologist Ecommerce from Amsterdam
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2
User Researcher(1)