4+ years owning TypeScript / React / Next.js apps end to end: architecture, UI, APIs, data and deploy. Comfortable in product teams — I ship features that hold up in production, not demos.
Antoni B. López
Software Engineer · Full-Stack4+ years
I am a full-stack software developer. For more than four years I have been building and maintaining web applications that real people use every day — learning platforms, financial tools, booking systems and offline-capable apps — owning them from the first database schema to the production deploy.
My work sits across the whole stack. On the frontend that means TypeScript, React and Next.js with a serious focus on performance and accessibility. On the backend it means well-modelled APIs, relational data, background jobs and infrastructure that does not wake anyone up at night.
What I care about is the part that usually gets skipped: understanding why the software is being built. A feature that ships fast but solves the wrong problem is a liability. So I ask about the business before I ask about the framework.
Alongside product development I design AI automation for companies drowning in manual process work. Same discipline, different surface: find the expensive repetition, model it properly, and let software carry it.
I start from the number you are trying to move, then work backwards to the smallest thing that moves it.
Performance and accessibility are requirements, not a phase two. Every page ships measured.
You will always know what is done, what is blocked and what it costs. No jargon as a shield.
Typed, documented and tested where it matters, so the next developer is not stuck — even when that is you.
The stack I reach for most, chosen per project rather than by habit.
A sample of the applications I have taken from an empty repository to something people use every day.
2026A custom yoga studio site with landing + five pages, and an admin panel to show/hide and reorder sections, edit every text including titles, and tweak colours and typography.
2026Custom dynamic web app for a Barcelona dance academy. Responsive, fast, and built with solid SEO.
2026An offline-first music app for social dancers, built to work in venues with no signal.
2025Gamified language-learning web app with ranking, daily streak, badges, a gem shop, real chat-style conversations, plus conjugations, verbs and more.
2025A private net worth tracker that turns scattered accounts into one honest number over time.
2025An AI CV builder that rewrites your experience against the specific job you are applying for.
2024A digital book library: store your books as PDFs, read them in a light/dark mode fullscreen reader, automatically save progress and resume exactly where you left off — offline on the metro, zoom, copy text, and more.
2022Full-stack take-home: multiplayer bingo in realtime with Express, React and Socket.io. In-memory room state, no MongoDB — built to prove Node and WebSocket mastery in a hiring process.
Whether you need a website that converts or an operation that runs itself, the engineering underneath is the same standard.
A clear website that loads fast on phones, looks trustworthy, and makes it easy for people to contact you.
WhatsApp bots, booking reminders and AI that take admin off your plate — automation that pays for itself.
Tell me what you need. I reply to every serious enquiry within one business day.
Prefer a conversation? Book a slot and we will talk it through.
