Ángel Pérez
@angelprz
I build end-to-end digital products that grow from idea to production.
SpainWhat I'm looking for
I founded and built LetterMe end-to-end, growing it to more than 6,000 users while owning engineering, product iteration, growth, marketing, customer support, and operations.
As a freelance full-stack product engineer, I turn startup and founder business problems into practical product and technical solutions. I own product strategy, UI/UX, architecture, frontend, backend, and delivery.
I've also built real-time audio, communication, messaging, and discovery experiences at Angle Audio, Zurich Technology Delivery Center Barcelona, and Nido / Friend Theory using Flutter, Next.js, React Native, and cloud infrastructure.
Experience
Work history, roles, and key accomplishments
Founder & Full-Stack Product Engineer
LetterMe
Dec 2023 - Present (2 years 9 months)
Founded, designed and built LetterMe end-to-end, growing the product to 6,000+ users. Owned engineering, product iteration, growth, marketing, customer support, and operations.
Freelance Full-Stack Product Engineer
Freelance
Sep 2021 - Present (5 years)
Designed and built products end-to-end for startups and founders, turning business problems into practical product and technical solutions. Owned product strategy, UI/UX, architecture, frontend, backend, and delivery.
Front-end & Mobile Software Engineer
Angle Audio
May 2021 - Sep 2021 (4 months)
Built real-time audio and communication features across Flutter and Next.js, integrating Agora, PubNub, Stream Chat, and native iOS/Android calling APIs. Built Angle's white-label embed layer for branded live audio rooms.
Mobile Software Engineer
Zurich Technology Delivery Center Barcelona
Jan 2021 - May 2021 (4 months)
Helped architect internal cross-platform Flutter apps for iOS and Android, building reusable component libraries and UI systems.
Mobile Software Engineer
Nido / Friend Theory
Feb 2019 - Jul 2020 (1 year 5 months)
Joined a small, early-stage team, building the Flutter app through 4 pivots and growth to 20,000+ users. Built real-time XMPP messaging and an offline-first social graph, and developed a Mapbox discovery experience with filtering and marker clustering.
Education
Degrees, certifications, and relevant coursework
Universidad Nebrija
Business Administration, Business Administration
Studied Business Administration at Universidad Nebrija in Madrid, Spain.
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