AI Engineering
RAG systems, LLM applications, document intelligence, evaluation.
About
I didn't start out as a software engineer. I started with telecommunications, learning how networks work, how signals move, and what happens when the systems underneath everything go down. That experience shaped the way I approach engineering. I like understanding what's happening underneath the surface, not just making something work.
From there, I moved into software and backend engineering, working with Spring Boot, APIs, microservices, banking and payment systems. I also got to work closer to the product itself, building frontend and mobile applications and seeing what it takes to turn an idea into something people can actually use.
More recently, I've been spending a lot of time on AI engineering. I've worked with RAG, document intelligence, LLM applications, and agents. What interests me isn't AI just because it's popular. I enjoy figuring out how these systems work and finding problems where they can actually be useful.
I think that's the thread running through most of what I've done. I'm curious about how things work, and I like building things once I understand them. I'm looking for opportunities where I can keep doing that, particularly across software, AI, and the systems that connect them.
Explore my GitHub ↗RAG systems, LLM applications, document intelligence, evaluation.
Cloud foundations and reliable deployment workflows.
APIs and services designed for real-world scale.
Responsive product experiences across web and mobile.
Structured data, semantic search, and observability.
Infrastructure
Learned how real networks and systems operate, from the ground up.
Backend & Banking
Started building production software — Spring Boot microservices for core banking systems.
Fintech & Product
Moved closer to actual users, leading frontend development for a fintech product.
AI Engineering
Started applying LLMs, RAG, and document intelligence to real clinical workflows.
Contact
Have a role, product challenge, or collaboration in mind? I'd love to hear about it.
wechulijac@gmail.com ↗