Hire the Best Engineering Freelancers
in Spain

Hi, I’m Borja 👋 I’m a versatile professional with a background in QA testing, graphic design, and creative arts. Over the past years, I’ve worked across different fields where precision, creativity, and communication were essential. ✨ What I can help you with: • Design & Creativity: logos, tattoo designs, flyers, posters, and banners — bringing ideas to life with a unique artistic touch. • Technical & Detail-Oriented Work: QA testing, data entry, Excel, Google Docs, and other structured tasks where accuracy matters. • Languages: Fluent in Spanish and English, with basic Indonesian. • Other Skills: Audiovisual Communications Engineer, and over 10 years of experience as a musician (guitarist in a band). I enjoy combining creativity with precision — whether it’s delivering a professional design, organizing information clearly, or ensuring quality in digital projects. I’m also highly adaptable and committed to giving clients reliable results and smooth communication. If you’re looking for someone who can approach your project with both creativity and accuracy, I’d love to collaborate with you.

You're awake at 2am because you’re almost, but not quite, where you want it to be! I've been there a few times on this life journey: 25 years full-stack, twice through to private equity exit. Seed round or series D, same deal: I'm there until it ships. I help across the full project lifecycle: - Prototyping / MVPs / UI&UX - Architecture to production - Project rescue - Legacy modernization - Long-term maintenance

I help startups and SaaS companies build software that continues to scale as the product grows. I enjoy joining projects at the point where things stop being simple. Maybe your product has grown faster than expected. New features are getting harder to ship, technical debt is slowing the team down, or the architecture that worked for the first version is starting to show its limits. That's usually where I can help. For the past 12+ years, I've been helping teams turn ideas into production software - and, just as importantly, keep that software maintainable as the business evolves. I work across the entire stack, from modern frontend applications to backend architecture and infrastructure. But clients don't hire me because I know React, Laravel, Vue, or any other framework. They hire me because I can quickly understand a complex system, make sound technical decisions, and build solutions that other engineers can confidently extend months or years later. Over the last few years, AI has naturally become part of my work. I've integrated LLMs into existing SaaS platforms, built AI-powered features and internal tools, automated workflows, and used AI to speed up development without sacrificing engineering quality. I don't build AI for the sake of it - I use it when it solves a real problem and delivers measurable value. One thing clients often tell me is that they don't have to manage me. I communicate clearly, ask the right questions early, and take ownership of the work. If I see a simpler solution, I'll suggest it. If I think a decision is likely to become technical debt six months from now, I'll raise that concern before we write the code. Beyond web development, I also work with Rust and systems programming, including Solana smart contracts, SDK development, asynchronous programming with Tokio, concurrency, and performance-critical software. That experience has shaped the way I think about performance, reliability, and software architecture across every project I work on. Whether you're building a new SaaS product, scaling an existing platform, modernizing a legacy application, or adding AI capabilities to your product, I'd be happy to help. Technologies Languages: TypeScript, PHP, Rust Frontend: React, Next.js, Vue, Nuxt, Angular, NgRx, TanStack Query, Redux Toolkit, RTK Query, Pinia, Tailwind CSS, SSR, SSG, Hybrid Rendering Backend: Laravel (Octane, Horizon, Cashier, Sanctum), REST APIs, GraphQL, WebSockets, Queue-based & Event-driven Architecture, Node.js AI: OpenAI, Anthropic, LLM integrations, AI-powered features, AI workflows, MCP, Prompt Engineering, AI-assisted development, Claude Code, Codex, ChatGPT Databases & Infrastructure: PostgreSQL, MySQL, Redis, ClickHouse, Supabase, Docker, CI/CD Payments & SaaS: Stripe, Subscription Billing, Multi-tenant Architecture Blockchain & Systems: Solana, Rust, SDK Development, Tokio, Async Programming, Concurrency, Serialization Testing: PHPUnit, Vitest, React Testing Library

Are you looking for a clear, natural and professional Spanish voice for your Project? I'm a native Spanish speaker with experience in voice-over audio Recording for commercials, audio books, podcasts, e-learning and corporate videos. I offer: - High quality recordings in a professional environment - Neutral spanish accent. - Fast delivery Let's make your Project sound amazing! Contact me today yo discuss your requirements.

Turn your UGC videos into high-converting ad creatives that drive clicks, retention, and sales. Get scroll-stopping content engineered with AI and conversion psychology — not just basic editing. Hi, I’m Mounir Chioui, an AI-powered UGC Video Editor specializing in performance-driven ad creatives. With a 100% Job Success Score and recognized as Rising Talent on Upwork, plus experience as an Etsy Star Seller and Fiverr Freelancer Plus, I understand what makes digital products and brands sell online. I don’t just edit videos — I build strategic ad assets designed to: ✔ Capture attention in the first 3 seconds ✔ Increase watch time and retention ✔ Reduce ad fatigue with dynamic pacing ✔ Improve CTR with conversion-focused hooks ✔ Optimize UGC for TikTok, Meta & Reels ads My workflow combines AI-enhanced editing + consumer psychology + ad structure strategy, allowing brands to launch faster and test more creatives efficiently. Fluent in English and Spanish, and native in Arabic, I help brands scale globally with culturally adapted content. If you're looking for simple editing, there are many options. If you're looking for UGC videos built to perform and convert — let’s work. 📩 Send me a message and let’s create your next winning ad.

Motivated Computer Science & Artificial Intelligence student with hands-on experience in software development, AI research, and frontend engineering. Passionate about building innovative solutions, with a strong background in programming, robotics, and fintech applications, with a track record of success in hackathons and accelerator programs. Eager to leverage technical expertise and problem-solving skills in dynamic and challenging environments.