Mobile, AI productsand editorial web.
Software is abundant. Clear thinking isn't.
Independent product engineer working with founders and studios. Currently shipping with CODX — ChutApp, Kunoa, S-Core. Based in Tenerife, between Bangkok and Shenzhen.
Jiménez
Three with CODX, one on the road.
Mobile-first products shipped between 2023–2025 with CODX's studio practice, plus a solo experiment from Asia. Each one made a different call — native, hybrid, AI-driven, or living inside a closed Chinese ecosystem. The calls are the work.
- App / 01Live
ChutApp
TikTok-style social network for grassroots football.
Players, teams and families share clips, goals and training moments in a moderated environment built for under-18s. Native iOS and Android, content backbone on Next.js + AWS Amplify.
Key callNative dual-platform from day one. The product is short-form video and on-device feel — gesture timing, playback consistency, capture quality. We chose to ship every feature twice and keep that surface tight.
SwiftKotlinNext.jsAWS AmplifyBuilt at CODX · codx.digital↗Year2023 — NowRoleMobile + product engineeringOutputiOS + Android, live - App / 02Live
Kunoa
AI-personalised training and nutrition, delivered through avatars of real experts.
Trainers and nutritionists become avatars the user interacts with. The plan adapts; the voice doesn't. Native iOS + Android, with a FastAPI service powering the personalisation layer beside the Next.js product surface.
Key callSplit the AI runtime from the product runtime. FastAPI carries the personalisation models; Next.js carries the marketing and admin. The seam lets the model evolve weekly without redeploying the app.
SwiftKotlinNext.jsFastAPIAWSPostgreSQLBuilt at CODX · codx.digital↗Year2024RoleMobile + AI integrationOutputiOS + Android, live - App / 03Live
S-Core
Gamified fan communities for international DJs.
Fans complete pre-event challenges to unlock tickets, drops and exclusive access. Multi-currency rewards, event-aware feeds, live across four continents. iOS native + React Native on Android, Firebase + Stripe underneath.
Key callReact Native on Android instead of native Kotlin. The surface is content and transactions, not gesture-heavy — and four continents asked for feature parity faster than dual-platform native could deliver. Different product, different call.
SwiftReact NativeNode.jsFirebaseStripeBuilt at CODX · codx.digital↗Year2025RoleMobile + payments integrationOutputLive across 4 continents - App / 04Built · Unpublished
China Survival Guide
A WeChat Mini Program. A field study turned working app.
A guide for foreigners moving through China, shipped inside WeChat as a Mini Program. Two views, single content store, no backend. Built and tested end-to-end inside WeChat's runtime — publication requires a Chinese company entity, which as a foreign individual isn't yet open to me.
Key callStayed inside WeChat's own primitives — WXML, WXSS, JavaScript. No bridge layer, no React shim, no backend. The point was to learn how the system actually works from the inside, not to bend it back into something familiar.
WXMLWXSSJavaScriptWeixin DevtoolsRead the build log↗Year2026RoleSolo buildOutputWorking build · Unpublished
Currently building.
Personal vehicles in different states of becoming. Not portfolio pieces — ongoing work the studio practice keeps coming back to.
- Building / 01Waitlist live
QuestClub
Private social game for friend groups built around seasonal missions, shared memories and long-term group competition.
StatusOnboarding systems and gameplay loops in active development.
questclub.app↗ - Building / 02Daily use
LanguageOS
Personal language-learning system focused on immersion, cultural context and daily usage rather than traditional gamification.
StatusInternal tool in active daily use.
language-os.vercel.app↗ - Building / 03In formation
Tian Core
Creative systems studio exploring AI-native products, editorial interfaces and internet culture through a cinematic digital aesthetic.
StatusIdentity system + experimental web explorations.
tian-core.vercel.app↗
Four ways to work together.
Defined formats with clear duration and scope. Bespoke and longer engagements by direct conversation. Everything starts with an email.
- Engage / 01
Mobile MVP
6–8 weeks·Starting at €6,000From idea to a working app you can put in front of users.
For:Founders who need a working product, not a 40-page roadmap. Mobile-first companies validating their first wedge.
Scope- One platform first (iOS or Android)
- One core user flow, end-to-end
- AWS, Firebase or Supabase backend
- Second platform as follow-up engagement
- Engage / 02
AI Integration Sprint
2 weeks·Starting at €2,500One AI workflow mapped, one production-ready integration shipped.
For:AI startups and product teams adding intelligence into an existing surface without losing a quarter to it.
Scope- Workflow audit and integration spec
- One LLM, agent, or automation in production
- Eval harness so you can measure quality
- Handover doc for your team
- Engage / 03
Editorial Landing System
2–3 weeks·Starting at €2,000Storytelling, positioning and motion direction for products that need taste.
For:AI products and internet-native brands tired of looking like the same Vercel template.
Scope- Positioning and narrative
- Editorial layout system
- Motion and art direction
- Production-ready Next.js build
- Engage / 04
Brand → Product Translation
3–5 weeks·Starting at €4,000Turning moodboards, identities and concepts into usable digital products.
For:Founders and studios with strong visual identity but no in-house engineering to push it into product.
Scope- Brand audit and translation map
- Component system in code
- One live product surface
- Decisions documented for future surfaces
Not sure which one? Write.
Start a conversation→Working notes on mobile, AI & Asia.
Personal voice — drafted in Spanish on purpose. Mobile dev decisions, agentic-AI commentary, and what I find moving through Asian tech ecosystems. English work and client copy lives everywhere else on the site.
- 2026 · 04 · 28Field log
Mi experiencia creando una mini app en WeChat
Una guía de China para extranjeros, construida dentro de WeChat. Lo complicado no fue programar — fue entender el sistema cerrado.
Read → - 2026 · 04 · 04Essay
Gemma 4: Google libera su modelo mas potente bajo Apache 2.0
Google lanza Gemma 4 bajo licencia Apache 2.0 por primera vez, con modelos edge que corren en moviles y Raspberry Pi. Analisis tecnico y estrategico.
Read → - 2026 · 04 · 01Essay
IA Agentica en 2026: El Fin de las Apps Tal Como las Conocemos
Los agentes de IA estan redefiniendo la interaccion con el software. El 40% de las empresas tendran agentes operativos en 2026, y el Model Context Protocol esta creando un nuevo estandar. Que significa esto para los desarrolladores.
Read → - 2026 · 03 · 31Essay
La IA ya no solo escribe codigo: ahora tambien lo audita
Qodo cierra una ronda de 70 millones para verificar codigo generado por IA. El desarrollo de software se divide en dos capas: generacion y verificacion.
Read → - 2026 · 03 · 26Essay
Lo que los devs occidentales no saben del ecosistema tech chino
China ha construido un ecosistema tech paralelo que la mayoria de desarrolladores occidentales desconoce. Open source, super-apps, HarmonyOS y una vision de IA muy diferente.
Read →