I'm Adrià Alcalà, a software engineer and CTO. Working remotely from Mallorca, I design and build complete products and support companies as a fractional CTO.
Busy with ongoing projects, with room to take on new ones
I design the architecture, write the code and leave the infrastructure ready to scale: Python and FastAPI, React and Google Cloud.
For startups and small companies that need a CTO's judgement without hiring one full time.
Cloud migrations, legacy modernisation, data pipelines and LLM-based solutions.
Websites, integrations and automation for local businesses, in person when needed.
Complete products I've designed and built: frontend, backend and infrastructure.
Crypto-trading platform connected in real time to Binance, Crypto.com, OKX, KuCoin, Bybit, Kraken and other exchanges.
13,000+ trades per second at peak
End-to-end Banking-as-a-Service platform for CoinPanel, with a public sandbox and Stripe, Revolut and Xero integrations.
Multi-region SaaS platform for wedding venues: six applications, bookings, commissions and payments.
In development
Real-time cycling app for iOS and Android, built to ride the 553 km of the Camino del Cid.
I put AI into production in my day-to-day work, and I use it to work better: agents, MCP servers and local models.
Personal project
Indexes codebases, uses a local LLM to write context documentation for each module and serves it to Claude Code through an MCP server. Everything runs locally: the code never leaves the machine.
Jacquard
I lead the engineering team that takes AI-generated content to production: prompt management, selection of generated content and integration with marketing platforms.
Open source
The 16 agents, 12 hooks and 20 skills I use every day to build with Claude Code, published as a reference repository.
Not every company needs a full-time CTO, but almost every company needs someone who makes good technical decisions. I work per project or with a limited part-time commitment.
−70%
lower infrastructure cost at CoinPanel after reviewing its architecture. Moving market data from Bigtable to Redis alone cut that component's cost by more than 90%.
Architecture, technical roadmap, review of the team or supplier, and help with hiring.
A diagnosis of performance, security and maintainability, with a prioritised plan.
From on-premise servers to Google Cloud or AWS, with Terraform, CI/CD and automated tests.
Stabilising and refactoring software with paying users without stopping the business.
Pipelines, BigQuery and Snowflake, and LLM solutions: RAG, agents and MCP servers.
A senior technical profile for subcontracting or joint bids (UTE) anywhere in Spain.
Tell me about it and I'll get back to you within 24–48 hours with an initial assessment and a custom quote.