Christian Ballares

I help startups and businesses build, improve, and scale modern web applications and AI-powered products using React, Next.js, TypeScript, Node.js, Python, and modern AI APIs.

Whether you need an AI feature added to an existing product, a complete SaaS application built from scratch, or a reliable backend and API architecture, I can take your project from idea to production.

What I can build for you:

• AI-powered SaaS applications
• Custom AI integrations and LLM applications
• AI chatbots and customer-support systems
• RAG systems and knowledge-base assistants
• AI agents and workflow automation
• Business dashboards and internal tools
• REST and GraphQL APIs
• Full-stack web applications
• MVPs and startup products
• E-commerce applications and integrations
• Third-party API integrations
• Stripe/payment integrations
• Database architecture and optimization
• Performance improvements and bug fixing
• Cloud deployment and production setup

My core technology stack:

Frontend:
React, Next.js, TypeScript, JavaScript, HTML, CSS, Tailwind CSS

Backend:
Node.js, Express, Python, FastAPI

AI:
OpenAI API, Claude API, LLM integrations, RAG, embeddings, vector databases, AI agents, prompt engineering

Database:
PostgreSQL, Supabase, MongoDB, Redis

Cloud & DevOps:
AWS, Vercel, Docker, GitHub Actions

Integrations:
REST APIs, GraphQL, Stripe, webhooks, OAuth, third-party APIs, n8n and workflow automation

Testing:
Jest, Playwright, automated testing and debugging

My approach

I focus on building software that is reliable, maintainable, and useful for the business—not just code that works in a demo.

I start by understanding your business requirements and existing architecture, then design the simplest practical solution. I communicate clearly throughout development, keep the codebase organized, and make sure the final product is ready for real users.

I can work with an existing development team, take ownership of a complete project, or help turn an early-stage idea into a production-ready MVP.

Projects I’m especially interested in:

→ AI SaaS platforms
→ Startup MVPs
→ AI automation
→ Custom business software
→ Existing application modernization
→ API and backend development
→ AI chatbot and knowledge-base systems
→ Dashboard and admin platforms
→ SaaS integrations
→ Long-term product development

If you have an existing application that needs AI capabilities, a product idea you want to validate, or a web application that needs a reliable developer, send me the details.

Tell me what you're building, what problem you're trying to solve, and where you are currently stuck. I’ll help you determine the most practical technical approach.