Landing Pages & Websites
High-converting landing pages and marketing sites — fast, responsive, SEO-ready and built to turn visitors into customers.
Landing pages, websites & apps that ship fast and convert.
I’m a senior engineer who designs and builds high-converting landing pages, marketing sites, web apps and native mobile apps — end to end. Already have something live? I audit and rescue it too.
- Free intro call
- Reply within 1 business day
- Fixed-price options
For founders, startups and teams who need a senior engineer to own delivery — not just write code.
10+
Years shipping software
Thousands
of users on apps I’ve built
2
Products founded & run in production
What I build
Services
Senior-level design and engineering — from a single landing page to a full native app, plus audits of what you already run.
Web Apps
Full-stack web apps, dashboards and SaaS platforms — with the cloud, APIs and CI/CD behind them — built to scale and stay maintainable.
Native & Mobile Apps
iOS and cross-platform mobile apps with the web and backend behind them — one product, on every screen your users are on.
Code & Project Audits
Independent audits of code quality, security, performance and architecture — with a clear, prioritized action plan you can act on.
Selected work
Products I’ve built and shipped
I don’t just advise — I found, build and run real products. Two of them, live in production with thousands of users.
r4wrun.com
r4wRun 
r4wRun
Thousands of athletes · live in productionFounder & developer. The race-day platform for downhill skateboarding, street luge and inline — registration, QR check-in, live brackets and final results behind one link. Live across iOS, PWA and web.
Visit site serve-app.net
SERVE 
SERVE
Thousands of players & clubs · live in productionFounder & developer. The all-in-one platform for padel players and clubs — matches, tournaments, leagues and Elo rankings. Live across iOS, PWA and web.
Visit siteTestimonials
What clients say
A few words from people I’ve built and shipped products with.
Adrià took our half-finished app, rescued it, and shipped it to production in weeks. Clear communication the whole way — it just worked.
Our new landing page doubled conversions. Fast, beautifully built, and he handled everything from design to deploy.
The audit gave us a clear, prioritized plan. We finally knew exactly what to fix and why. Senior-level work, no fluff.
About
A senior engineer you can hand the whole problem to
I’m a senior software engineer who designs and builds the things you sell with: landing pages, marketing sites, web apps and native mobile apps. In practice I cover the whole spectrum — new builds, refining and rescuing existing ones, and independent audits.
My priority is simple: ship software that works, that’s maintainable, and that actually moves your business forward. You get clear communication, pragmatic decisions, and ownership from first call to production.
- End-to-end ownership — design, code, deployment
- Clear communication and realistic timelines
- Pragmatic, maintainable, well-tested solutions
- Comfortable jumping into existing codebases
How I work
A simple, transparent process
01
Discovery
We talk through your goals, constraints and budget on a free intro call. I ask the hard questions early.
02
Proposal
You get a clear scope, timeline and fixed price — no surprises, no vague hourly estimates.
03
Build
I build in short iterations with regular check-ins, so you always see progress.
04
Ship & support
We launch, I hand over clean docs, and I’m around to support what we built.
FAQ
Questions, answered
How much does a project cost?
It depends on scope. Landing pages and marketing sites are fixed-price; larger web and native apps are quoted after a short discovery call. You always get a clear price before we start — never an open-ended hourly bill.
How long does it take?
A landing page is typically 1–2 weeks, a marketing site 2–4. Web and native apps depend on scope, but I work in short iterations so you see real progress every week.
Do you work remotely?
Yes — I work remotely with clients anywhere, async-friendly, with regular check-ins. I’m based in Barcelona (CET).
Can you take over an existing project?
Absolutely. I regularly jump into existing codebases to refine, fix or rescue stalled projects — an audit is often the best first step.
What if I just need an audit?
That’s a service on its own. You get an independent review of code, security, performance and architecture, delivered as a prioritized, actionable report.
Are you available right now?
I take on a limited number of projects at a time. Send a message and I’ll tell you my earliest start date within one business day.
Get in touch
Let’s build something
Tell me about your project — a landing page, a new app, an audit, or something that needs rescuing. I reply within one business day.
- Free intro call
- Fixed-price options
- Reply within 1 business day