Experience

• Senior AI Engineer

  Collectly · United States, Remote06/2025 – Present
  • Lead AI engineering on a patient billing platform, building agentic workflows that read statements, answer balance and insurance questions, and route edge cases to staff - cutting manual review on routine tickets by ~45%.
  • Designed a RAG layer over payer policies, billing codes, and account history so the assistant gives grounded answers with citations, raising answer accuracy in internal evals from the high 70s to ~92%.
  • Implemented a labeled regression set and automated scoring in CI so prompt and model changes are checked before release.
  • Tuned retrieval, caching, and model routing to send simpler calls to smaller models, dropping average response latency by ~35% and trimming monthly LLM spend by ~30%.
  • Mentor two engineers on prompt design, eval practices, and safe rollout patterns for AI features.

• AI Engineer

  Helicap · Singapore, Remote01/2024 – 05/2025
  • Built LLM tools for a lending and credit investment team, including a document assistant that extracts figures and terms from financial PDFs - reducing manual data entry time per deal by ~60%.
  • Shipped a RAG-based research assistant over company filings and internal memos using pgvector and FastAPI, letting analysts surface context in seconds instead of digging through folders.
  • Added agent-style tool calling so the assistant could query internal APIs and databases for live numbers, with guardrails to prevent returning unverified figures.
  • Set up tracing and cost dashboards for every LLM call to surface token usage, latency, and failure rates per feature.

• Software Engineer

  Alliance Software Inc. · Manila, Philippines05/2022 – 12/2023
  • Built and maintained backend services in Python and Node.js for client-facing web products, owning API design, database work, and third-party integrations.
  • Delivered an early generative AI feature that drafted customer support replies from a knowledge base, helping a pilot team cut average first response time by ~40%.
  • Improved a slow reporting endpoint by reworking queries and adding caching, reducing a common request from several seconds to under 400ms.
  • Added a test suite and GitHub Actions pipeline to a service that had none, noticeably reducing bugs reaching production.

• Junior Software Engineer

  VintaSoft Inc. · Zamboanga City, Philippines08/2021 – 04/2022
  • Wrote backend features and bug fixes in Python for internal business tools, learning the codebase through tickets and code review.
  • Built REST endpoints and database queries for a document processing tool and added input validation that reduced bad data getting saved.
  • Wrote unit tests and helped move part of the team toward consistent testing practices.