Hire Justin F. - LLM Engineer

* AI platform team building internal tooling and ML infrastructure for engineering orgs. * Built and maintained a RAG service answering internal engineering questions from 40,000+ pages of documentation, cutting average ticket resolution time by 28% * Split the core recommendation API out of a monolithic service into three independently deployed services, dropping p95 latency from 640ms to 210ms * Partnered with product design on a redesign of the developer dashboard, running 4 rounds of usability testing and translating findings into a component library used across 6 product surfaces * Set up CI/CD pipelines and canary deployments for the ML platform, cutting failed production releases from ~1/month to 2/year * Mentored 3 mid-level engineers and led the team's biweekly architecture review

* Trained and deployed a fraud-detection model that caught 19% more confirmed fraud than the rules-based system it replaced, while cutting false positives by 12% * Built a feature pipeline in Airflow and Spark processing ~2.3TB of transaction data daily * Worked with the design team to build a case-review interface for fraud analysts, cutting average review time from 6 to 3.5 minutes per case * Wrote onboarding documentation and led training sessions for new data engineers

* Logistics scheduling platform used across ~150 depots. * Built REST APIs and background job workers in Python and Java for a logistics scheduling platform used across ~150 depots * Migrated a legacy PHP billing module to a Django service, reducing customer-reported billing discrepancies by 40% * Wrote unit and integration tests that raised backend test coverage from 34% to 78% over 18 months