always available
>

years_in_industry0++ since 2019
products_shipped0++ banking, travel, web3
primary_stackreact++ ts, next.js, web3
craft_focustrueui quality + engineering rigor
// selected_work$ ls -la
01

bbva online banking

enterprise banking platform serving millions of users across spain

[react][typescript][lit-element]
→bbva.es
02

edreams

europe's largest online travel company — flights, hotels, dynamic packages

[react][graphql][next.js]
→edreams.es
03

openbrick

tokenized real estate investment platform built on blockchain

[react][rwa][next.js]
→openbrick.co
04

hedera stablecoin studio

stablecoin studio tool for hedera hashgraph ecosystem

[react][web3.js][vite]
→stablecoin-studio.hedera.com
05

hedera asset tokenization studio

asset tokenization tool for hedera hashgraph ecosystem

[react][web3.js][vite]
→tokenization-studio.hedera.com
06

opiac — fondo indii

interactive mapping nft marketplace for a colombian ong

[react][mapbox][data-viz]
→fondoindii.wuonka.com
07

iobuilders + iopartners

blockchain consultancy & venture studio — corporate sites and web3 tooling

[next.js][tailwind][web3]
→io.builders
08

madrid yield rent

real estate yield calculator and rental investment analysis platform

[react][vite][tailwind]
→madridyieldrent.com
09

dustoff

native solana dApp for mobile wallet hygiene — scan, clean, and reclaim SOL

[web3.js][react native][dApp]
→dustoffsolana.com
// experience$ git log --oneline

product engineer (frontend)

iobuilders — oct 2023 → present
[active]

building and evolving scalable frontend applications within a blockchain ecosystem — spanning backoffice tools, tokenization platforms, RWA solutions, and decentralized applications.

reactweb3design systemstailwind

frontend developer

edreams — apr 2021 → oct 2023
[completed]

junior frontend developer

bbva it — jan 2019 → apr 2021
[completed]
// toolkit$ cat package.json
core_languages
javascripttypescript
frameworks
next.jsvitevuenode.js
ui_and_design
tailwindstorybookradix uishadcn/ui
web3_and_tooling
web3.jsethers.jswalletconnect
state_and_data
tanstack queryzustandzodreact-hook-form
testing_and_observability
jestplaywrightsentrygithub actions
// origin_story$ cat README.md
01

early design curiosity

started exploring visual design — learned hierarchy, spacing, and rhythm. developed an eye for detail and interface quality.

02

ironhack bootcamp

transitioned into software engineering — discovered that building interfaces was the bridge between product thinking and code.

03

product engineer

now building at the intersection — frontend systems, design systems,and web3 dApps where craft meets execution.

"the best interfaces are the ones that are built when engineering, systems thinking, and user experience align. i've spent my career building at that intersection."

— pepe sainz
>let's build something_
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© 2026 pepe sainz. all rights reserved.

Pepe Sainz