Cosmin Gagea
Senior Software Engineer & AI Engineer
Tech lead at Romflex Sistem, Bucharest. I work in AI engineering and backend development: LLM applications and scalable systems.
Work
Radiation dose monitoring
Tracks each patient's cumulative radiation exposure and produces the regulatory reports CNCAN, Romania's nuclear regulator, asks for.
- Role
- Tech lead, team of 4-5 engineers
- Scale
- Every site of a private hospital network, feeding one central platform
- Stack
- Python, Next.js, Rust
Voice-first hotel front desk
A lobby kiosk and a phone receptionist that handle check-in, walk-ins, stay extensions, checkout and room changes in 5 languages.
- Role
- Built the kiosk app, backend, PMS microservice, ID OCR and RAG concierge
- Scale
- 5 languages, at the lobby kiosk and on the phone
- Stack
- Rust/Axum, PostgreSQL, React 19
Lawren.AI
Answers questions about Romanian law with a citation to the exact source and to the version of the text it relied on.
- Role
- Software engineer, end to end
- Scale
- 18,000+ Romanian legal documents
- Stack
- Rust, PostgreSQL, Redis, Qdrant
Four more projects
Public sector
- Multi-agent system
Answers plain-language questions over a database with hundreds of tables, in production.
Commerce and growth
- Multi-tenant outreach platform
Owned its Kubernetes deployment and built an LLM classifier for contact roles.
- Product-search assistant
Finds products from a plain question, using vector search and a product graph.
Research
- Nuclear-physics tools, IFIN-HH
Two web tools for IFIN-HH, with document OCR, validated with the researchers.
Tech lead at Romflex Sistem.
Since February 2026 I lead technical delivery for a team of 4-5 engineers: architecture, code reviews, engineering practices and stakeholder coordination.
Nov 2024 to Feb 2026
Software engineer, Lawren.AI
Built a legal AI platform end to end: backend services, ingestion and frontend integration.
Jun to Aug 2024
Web developer intern, IFIN-HH
Two web tools for nuclear-physics research, validated with the researchers.
2026
Graduated BSc, started MSc
BSc in Computer Science / Software Engineering, graduated June 2026. Now an MSc student in Information and Computer Systems Engineering, 2026-2028. Both at Politehnica University of Bucharest (ETTI).
Awards
FIRST Tech Challenge 2019, national champion out of about 100 teams and world quarter-finalist in Detroit. SIE Hackathon 2024, 3rd place.
Expertise
- Software engineering
- Artificial intelligence
- LLMs
- Python
- Backend development
- Rust
- Next.js
- RAG
- Kubernetes
- PostgreSQL