Junior
AI Engineer template
RILEY CHEN
AI Engineer · Junior
Seattle, WA · riley.chen@email.com · (555) 010-1102 · linkedin.com/in/RileyChenAI
Summary
AI engineer with 2+ years shipping production LLM features: RAG pipelines, tool-calling agents, and evaluation loops that PMs trust. Comfortable owning prompt design through monitoring — not just notebook demos.
Experience
AI Engineer
Northbeam Labs · 2023-Present
- Launched a RAG support agent over 40k docs; raised deflection rate from 18% to 34% while holding escalation quality.
- Designed LLM eval suite (faithfulness, latency, cost); blocked 3 unsafe prompt rolls before customer impact.
- Fine-tuned a classifier with LoRA for intent routing; cut misroutes by 29% vs. zero-shot baseline.
- Added cost and latency monitoring per model; kept spend flat while traffic grew.
- Partnered with PM on rollout gates so LLM changes shipped behind measurable quality checks.
- Key project — Agent evaluation toolkit: compared tool-calling agents on task success and cost with documented failure taxonomies.
AI Platform Engineer (contract)
Brightline · 2022-2023
- Wired LangChain tools to internal APIs with guardrails; cut median response latency from 4.8s to 2.1s.
- Built a typed gateway for LLM calls so teams shared rate limits and retries.
- Added tracing to tool-calling flows; made agent failures debuggable step by step.
- Wrote integration tests for tool schemas; caught breaking changes before release.
- Documented prompt and tool conventions so new features stayed consistent.
- Key project — Prompt regression harness: built a golden-set runner that flagged quality drops before deploy.
Skills
Python · LLM APIs (OpenAI, Anthropic, Gemini) · LangChain / LlamaIndex · Vector databases (Pinecone, Weaviate, pgvector) · RAG architecture · Prompt engineering · Fine-tuning (LoRA, PEFT) · LLM evaluation frameworks
Education
MS Computer Science · Pacific University · 2022