Daniel Rojas Grass

Backend & AI Engineer | Python, FastAPI, React, AWS | AI Agents & RAG

I’m a Software Engineer with 3 years of professional experience building backend, full-stack, cloud, and AI-powered solutions. I help companies turn complex requirements into scalable, reliable, and maintainable software, from architecture and API design to deployment and production monitoring.

My core expertise is in Python, FastAPI, Django, Node.js, React, TypeScript, PostgreSQL, Docker, and AWS. I have hands-on experience developing microservices for financial systems, integrating critical third-party APIs, working with serverless and container-based cloud architectures, and implementing CI/CD workflows.

I also specialize in AI engineering, particularly multi-agent systems, RAG, LangChain, LangGraph, MCP Servers, OpenAI and Gemini APIs, prompt engineering, and context engineering. I can help build intelligent assistants, AI automation workflows, knowledge-based systems, and applications that integrate LLM capabilities into real business processes.

Beyond coding, I have experience in software architecture, technical analysis, and leading development teams, which allows me to understand both the technical and business sides of a project. I’m comfortable taking ownership of a solution from initial requirements and architecture through development, deployment, and iteration.

I can help you with:

• Backend development and REST API design

• AI agents and multi-agent systems

• RAG and LLM-powered applications

• SaaS and full-stack product development

• Microservices and third-party integrations

• AWS cloud infrastructure and serverless applications

• PostgreSQL and database-backed applications

• AI workflow and business-process automation

• Software architecture and technical consulting

I value clean architecture, clear communication, maintainable code, and practical solutions that solve real business problems. Whether you need to build a new product, integrate AI into an existing platform, improve your backend architecture, or automate internal processes, I can help take the project from idea to production.