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Hi, I’m Ángel Morillas, a freelance software developer focused on building robust web applications and backend services. I enjoy turning complex problems into clean, scalable code, from frontend UX work to server integrations and performance optimizations. I’ve shipped projects for startups and SaaS companies, integrated third-party systems, and contributed to security improvements. I’m passionate about learning new technology, mentoring code quality, and delivering practical solutions that users enjoy.…Hi, I’m Ángel Morillas, a freelance software developer focused on building robust web applications and backend services. I enjoy turning complex problems into clean, scalable code, from frontend UX work to server integrations and performance optimizations. I’ve shipped projects for startups and SaaS companies, integrated third-party systems, and contributed to security improvements. I’m passionate about learning new technology, mentoring code quality, and delivering practical solutions that users enjoy.

Ángel Morillas Mancilla

Web Developer, Full Stack Developer, Back-End Developer, +2

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Hi, I’m Ángel Morillas, a freelance software developer focused on building robust web applications and backend services. I enjoy turning complex problems into clean, scalable code, from frontend UX work to server integrations and performance optimizations. I’ve shipped projects for startups and SaaS companies, integrated third-party systems, and contributed to security improvements. I’m passionate about learning new technology, mentoring code quality, and delivering practical solutions that users enjoy.…Hi, I’m Ángel Morillas, a freelance software developer focused on building robust web applications and backend services. I enjoy turning complex problems into clean, scalable code, from frontend UX work to server integrations and performance optimizations. I’ve shipped projects for startups and SaaS companies, integrated third-party systems, and contributed to security improvements. I’m passionate about learning new technology, mentoring code quality, and delivering practical solutions that users enjoy.

Available to hire

Hi, I’m Ángel Morillas, a freelance software developer focused on building robust web applications and backend services. I enjoy turning complex problems into clean, scalable code, from frontend UX work to server integrations and performance optimizations.

I’ve shipped projects for startups and SaaS companies, integrated third-party systems, and contributed to security improvements. I’m passionate about learning new technology, mentoring code quality, and delivering practical solutions that users enjoy.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Beginner

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Freelance Software Developer at Self-employed

February 1, 2025 - Present

As a freelance developer, I built a GPU-accelerated BIP39 Ethereum seed phrase bruteforcer to assist wallet recovery (130,000 seeds/s on an RTX3060; CPU alternatives around 3.8k seeds/s on a 12-core CPU). I also helped a small Swiss startup (Golgaf Gmbh) launch kraa.io, a social note-taking web app, focusing on frontend components, bug fixing, and addressing XSS vulnerabilities.

Backend Developer at Entertainment Solutions SL

November 1, 2024 - October 16, 2025

I modified Vendure, an open-source headless ecommerce solution, to fit the company needs and integrated it into their SaaS offering. I worked on integrations between Vendure and systems such as Infrasys, Epson thermal printers, and mailing services, and contributed to frontend work for the SaaS website, smart TV app, and mobile PWA, focusing on ecommerce UI. I found and reported a critical XSS vulnerability that could allow an unprivileged user to steal a god-mode token from our technical support staff. For the TV frontend I implemented a graph-based focus management system (spatial navigation) to replace the previous pixel-scanning approach, enabling stacked navigation contexts in modals and focus-trapped containers.