Software
Software
Custom software and digital products designed around real problems — local-first, maintainable, honest about scope.
See the tools →DEVELOPER & SOFTWARE BUILDER
I build software, AI tools and digital products.
I'm Daniel — an independent developer and software builder from Spain, creating AI-powered tools, developer software, websites, automation systems and digital products. I document what I learn by writing.
softwareai toolscybersecuritywebautomationseo
01
What I build
// noteSix areas, one habit: software that does a real job and is honest about what it does.
AI
AI
AI-powered tools, agents and automation with practical applications — built around your workflows, not the hype.
Kestro →Security
Cybersecurity
Security tooling, auditing and testing — for authorized environments, with evidence you can act on.
AMAS · CyberAudit Pro →Web
Web
Fast, modern websites and web applications built with a close eye on performance, readability and SEO.
NexoWave →SEO & GEO
SEO & GEO
Deterministic SEO auditing and content systems optimized for search engines and AI answer engines.
SEO Engine →Automation
Automation
Systems that connect tools, APIs and workflows to remove repetitive work — quietly and reliably.
Work with me →02
Software I build
// noteReal products, presented like products — not repository cards. Each one is software I build and use myself.
AI assistant
Kestro
A local AI assistant that can operate your browser, files, terminal and connected tools.
- Browser interaction
- File interaction
- Terminal interaction
- Telegram connection
Security tooling
AMAS
AI Model Attack Simulator — a red-teaming CLI that probes LLM and agent endpoints for common attack patterns.
- 40+ attack techniques
- OpenAI-compatible endpoints
- Rule-based detection
- Optional LLM judge
Security framework
CyberAudit Pro
A professional web security auditing framework that inspects sites and services for common weaknesses.
- Security headers & cookies
- TLS & DNS checks
- Subdomain discovery
- HTML / JS / form inspection
SEO tooling
SEO Engine
A deterministic, rule-based SEO audit and analysis tool — replace guesswork with transparent, reproducible findings.
- Real crawling
- Optional Playwright rendering
- 49 versioned SEO rules
- Technical / on-page / content analysis
all tools // the tools are the products, GitHub is just where the code lives
03
NexoWave
// noteThe client-facing side of what I do — my own development studio, built from scratch.
building · est. 2026Websites · Software · AI · Automation
NexoWave
A digital development studio focused on websites, software, AI and automation.
Where the client-facing digital work happens — websites, custom software, AI features and automation for real businesses.
Explore NexoWave // live site coming soon — the build is public either way
Next.js
React
TypeScript
Tailwind CSS
Vercel
Supabase
04
One purchase. Every tool.
// noteThe product model: one purchase opens the whole collection — current tools, future tools and every update in between.
// the collection
ONE PURCHASE.
EVERY TOOL.
A single purchase gives you access to the collection of my tools: current products like Kestro, AMAS, CyberAudit Pro and SEO Engine, plus future tools and improvements as they ship.
- Every tool in the collection — today and tomorrow.
- All updates and improvements to existing tools.
- New products added to the collection over time.
price — coming soon
// you bring
Your keys. Your infrastructure. Your calls.
The tools work with your own accounts and services where they need one. Important: the purchase does not cover third-party usage — tokens, APIs and hosting you consume are on you.
- API keys & AI provider accounts where a tool needs them.
- Your own infrastructure and third-party services.
- Ongoing costs of using those services (tokens, hosting, API usage).
// clear by design: one price for the software.
// usage costs stay with the person using it.
05
Work with me
// noteWork directly with an independent developer who designs and builds the solution — no account managers, no hand-offs.
Websites
Modern sites focused on performance, usability and conversion.
moreSoftware
Custom software and technical products built around specific workflows.
moreAI & automation
AI-powered systems, agents and automated workflows that remove repetitive work.
moreTechnical projects
Custom development and technical problem solving — direct, no middle layers.
more// how it works
Tell me what you're building
A short description is enough — even a rough idea.
I review it
I look at scope, feasibility and the right approach.
We discuss the project
A direct conversation about what you actually need.
I build the solution
Designed and built by one developer, end to end.
// direct access
You talk to the person writing the code.
No agencies selling you a team you'll never meet. If there's a technical problem, you'll hear the technical solution — direct and honest.
06
Latest writing
// noteA technical publication, not a news feed — documented research, experiments and build logs.
Cybersecurity3 min read
AI red teaming for developers: a practical introduction
Prompt injection, jailbreaks and extraction attacks are part of building with LLMs today. Here's how a red-team mindset fits into the engineering workflow — and what an attacker simulator automates for you.
read articleAI3 min read
Building a local AI assistant that operates your machine
Browser, files, terminal and Telegram from one assistant: the architecture decisions behind a local AI assistant like Kestro — surfaces, provider layers, confirmations and audit trails.
read articleWeb Development2 min read
Web security checklists that catch the issues that matter
Headers, cookies, TLS and exposed surfaces: the concrete, checkable security items a development workflow should run — and how an automated auditor frames them as evidence.
read article07
The developer
// noteA short version of who's behind the build.
// about daniel
I'm Daniel — an independent developer and software builder living in Spain. I design, build and ship software, AI tools and digital products.
I experiment with AI, work on cybersecurity and security tooling, build websites and automation systems, write technical articles about what I learn, and operate NexoWave — my development studio.