Hi! I'm Santi Espada, a Senior Full-Stack Engineer with 8+ years of experience building innovative web applications and AI-driven solutions. I've collaborated with 25+ teams across startups, enterprises, and fintech, delivering scalable products that drive real business impact. 🔧 Core Expertise: • Frontend: React, Next.js, Vue.js, Nuxt.js, TypeScript, JavaScript • Backend: Node.js, Python, Django, FastAPI, GraphQL, REST APIs • AI/ML: LLMs integration, AI-powered features, conversational interfaces • Infrastructure: AWS, Docker, Kubernetes, Terraform, CI/CD • Databases: MongoDB, PostgreSQL, MySQL, Redis 🚀 What I Deliver: I specialize in building modern, scalable web applications that leverage AI to enhance user experiences. Whether you need an AI-powered e-commerce platform, a fintech dashboard with real-time analytics, or a content management system with smart features, I deliver production-ready solutions that scale. 💼 Key Experience: • Led development of Multimarkts, an AI-enhanced visual shopping platform for media outlets and content creators • Built equity planning tools at Secfi, helping tech professionals understand their compensation packages • Developed visual search features for Billionhands, a platform processing millions of offers • Contributed to banking platform development at ING Bank, working with large-scale enterprise systems 🎯 Why Work With Me: • Proven Track Record: Successfully delivered products used by thousands of users • Full-Stack Mastery: Handle everything from UI/UX to backend architecture and DevOps • AI-First Approach: Stay ahead of tech trends with cutting-edge AI integrations • Startup Experience: Thrive in fast-paced environments with rapid iteration • Global Perspective: International experience with remote-first collaboration I love transforming ideas into exceptional digital experiences. Let's discuss your project and build something amazing together! 📧 Available for: Freelance, Contract, Full-time 🌍 Location: Madrid, Spain (Remote-friendly)

Santiago Espada Escolar

Hi! I'm Santi Espada, a Senior Full-Stack Engineer with 8+ years of experience building innovative web applications and AI-driven solutions. I've collaborated with 25+ teams across startups, enterprises, and fintech, delivering scalable products that drive real business impact. 🔧 Core Expertise: • Frontend: React, Next.js, Vue.js, Nuxt.js, TypeScript, JavaScript • Backend: Node.js, Python, Django, FastAPI, GraphQL, REST APIs • AI/ML: LLMs integration, AI-powered features, conversational interfaces • Infrastructure: AWS, Docker, Kubernetes, Terraform, CI/CD • Databases: MongoDB, PostgreSQL, MySQL, Redis 🚀 What I Deliver: I specialize in building modern, scalable web applications that leverage AI to enhance user experiences. Whether you need an AI-powered e-commerce platform, a fintech dashboard with real-time analytics, or a content management system with smart features, I deliver production-ready solutions that scale. 💼 Key Experience: • Led development of Multimarkts, an AI-enhanced visual shopping platform for media outlets and content creators • Built equity planning tools at Secfi, helping tech professionals understand their compensation packages • Developed visual search features for Billionhands, a platform processing millions of offers • Contributed to banking platform development at ING Bank, working with large-scale enterprise systems 🎯 Why Work With Me: • Proven Track Record: Successfully delivered products used by thousands of users • Full-Stack Mastery: Handle everything from UI/UX to backend architecture and DevOps • AI-First Approach: Stay ahead of tech trends with cutting-edge AI integrations • Startup Experience: Thrive in fast-paced environments with rapid iteration • Global Perspective: International experience with remote-first collaboration I love transforming ideas into exceptional digital experiences. Let's discuss your project and build something amazing together! 📧 Available for: Freelance, Contract, Full-time 🌍 Location: Madrid, Spain (Remote-friendly)

Available to hire

Hi! I’m Santi Espada, a Senior Full-Stack Engineer with 8+ years of experience building innovative web applications and AI-driven solutions. I’ve collaborated with 25+ teams across startups, enterprises, and fintech, delivering scalable products that drive real business impact.

🔧 Core Expertise:
• Frontend: React, Next.js, Vue.js, Nuxt.js, TypeScript, JavaScript
• Backend: Node.js, Python, Django, FastAPI, GraphQL, REST APIs
• AI/ML: LLMs integration, AI-powered features, conversational interfaces
• Infrastructure: AWS, Docker, Kubernetes, Terraform, CI/CD
• Databases: MongoDB, PostgreSQL, MySQL, Redis

🚀 What I Deliver:
I specialize in building modern, scalable web applications that leverage AI to enhance user experiences. Whether you need an AI-powered e-commerce platform, a fintech dashboard with real-time analytics, or a content management system with smart features, I deliver production-ready solutions that scale.

💼 Key Experience:
• Led development of Multimarkts, an AI-enhanced visual shopping platform for media outlets and content creators
• Built equity planning tools at Secfi, helping tech professionals understand their compensation packages
• Developed visual search features for Billionhands, a platform processing millions of offers
• Contributed to banking platform development at ING Bank, working with large-scale enterprise systems

🎯 Why Work With Me:
• Proven Track Record: Successfully delivered products used by thousands of users
• Full-Stack Mastery: Handle everything from UI/UX to backend architecture and DevOps
• AI-First Approach: Stay ahead of tech trends with cutting-edge AI integrations
• Startup Experience: Thrive in fast-paced environments with rapid iteration
• Global Perspective: International experience with remote-first collaboration

I love transforming ideas into exceptional digital experiences. Let’s discuss your project and build something amazing together!

📧 Available for: Freelance, Contract, Full-time
🌍 Location: Madrid, Spain (Remote-friendly)

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Advanced
Spanish; Castilian
Fluent

Work Experience

Senior Full-stack Engineer at Multimarkts / nc43|tech
March 1, 2025 - September 1, 2025
Led R&D for AI-driven projects including Multimarkts, an AI-enhanced visual shopping platform enhancing user engagement and monetization for media outlets and content creators. Also contributed briefly to other AI projects such as Adsviu, a cookieless contextual advertisement platform, and the Billionhands rankings platform. Managed two engineers and re-engaged with frontend development after time focused on backend. Utilized technologies like Cursor, LLMs, TypeScript, NodeJS, MongoDB, Vue.js, Nuxt.js, AWS, Docker, and Terraform.
Backend Engineer at Secfi
January 1, 2023 - September 1, 2025
Worked primarily on the Planning Domain, especially the Equity Planner tool, which helps users understand exercise costs in detail. Gained experience in a high-stress startup environment with international relocation. Learned about taxes, equity, startup dynamics, leadership, and rapid iteration. Worked with Python, Django, FastAPI, microservices, Kubernetes, PostgreSQL, and Metabase.
Full-stack Developer at Billionhands (nc43|tech)
March 1, 2022 - September 1, 2025
First backend-focused role in a startup-like environment within nc43|tech. Enjoyed backend work and contributed across full stack development while gaining startup experience.

Education

Undergraduate Studies (Science and Technology) at IES Butarque
January 1, 2014 - January 1, 2016
BSc in Computer Science (first two years) at Universidad Carlos III de Madrid
January 1, 2014 - January 1, 2016
BSc in Computing & IT (ongoing) at The Open University (UK)
January 1, 2018 - September 1, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Non-Profit Organization, Media & Entertainment, Financial Services, Software & Internet

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
See more