hello, I'm
Rena Thomas
Senior Full-Stack Engineer
AI Systems & LLM Infrastructure · Platform Engineering & DevOps
Over a decade building and scaling production systems across fintech, healthcare, and AI infrastructure. Founding CTO turned LLM specialist — I build things that are observable, resilient, and designed to compound.
About
I'm a full-stack engineer based in New York with over a decade of production-grade experience building systems that scale. My background spans fintech at JP Morgan, five years as founding CTO at Vegannation, and now deep specialization in LLM agent architecture and real-time AI orchestration as a senior contractor.
I got into software through a physics and mathematics degree at Yeshiva University and a masters in computer science from Ben Gurion University. The rigor from that path shapes how I approach every system I build — I care deeply about correctness, observability, and designing for failure.
Right now I'm most interested in the infrastructure layer underneath AI products: agent orchestration, multi-provider voice AI, RAG pipelines, and the reliability engineering that makes AI systems actually trustworthy in production.
Location
New York, NY
Currently
Freelance / Contractor
LLM systems, AI infra
Education
MA Computer Science
Ben Gurion University
BA Math & Physics
Yeshiva University
Tech Stack
AI & LLM
- LLM Agent Orchestration
- Multi-Agent Pipelines
- RAG Architecture
- OpenAI · Whisper
- Deepgram · Voice AI
- Prompt Engineering
- TensorFlow · PyTorch
Cloud & DevOps
- AWS (EKS, Lambda, API GW)
- GCP · Azure · IBM Cloud
- Terraform · IaC
- Docker · Kubernetes
- CI/CD · GitHub Actions
- Observability & SRE
Languages
- TypeScript · JavaScript
- Node.js · NestJS
- Python (FastAPI, Flask)
- Java (Spring Boot)
- Solidity · Perl
Frontend & Data
- Next.js · React · Vue
- React Native · Angular
- Tailwind CSS
- PostgreSQL · Firebase
- Real-Time Sync
Recent Posts
All posts →Building LLM Agents That Don't Break in Production
Most LLM agent demos look clean. Production is a different story. Here's how I think about designing agent systems that are actually reliable.
What I Learned as a Founding CTO
Five years leading engineering at a startup taught me things no university or senior role at a big bank could. Here's what actually matters when you're the one accountable for everything.