Goldsmith & Co. AI Lead & Software Engineer
Jan 2025 — present · New York, NY- Sole engineer at an executive search firm: I own every production system end to end, including a Rails and Postgres API, a client-facing portal (JavaScript, OAuth 2.0 with PKCE, role-scoped authorization), a Snowflake reporting layer, and an internal AI platform, and I set technical direction with firm leadership.
- Built the human correction loop for a production data pipeline: recruiters edit records inline in the portal, corrections land in an override store, an admin is pinged for review, and the accepted correction feeds back into the system of record. Real annotators who are not engineers, on data the business depends on.
- Designed and shipped an agent platform (LangGraph.js and the Claude API) now in daily use by non-technical staff, plus the evaluation framework measuring whether its output is actually correct, including adversarial testing against a curated attack corpus.
- Kept that portal healthy while requirements shifted weekly: automated build and deploy, render-escaping invariants, contract tests, and a full security-audit remediation round.
- Diagnosed a silent 8% data loss in a production sync pipeline (4,840+ failed syncs, missing history rows, phantom records) that had corrupted downstream reporting undetected. Traced root cause, repaired the historical record, and added invariant checks so the failure surfaces immediately rather than silently.
- Supervised an ML intern on a learning-to-rank project (LambdaMART, NDCG). Established by measurement that ranking quality was structurally capped by label sparsity rather than model choice, and redirected the work instead of tuning against a ceiling. The labels were the bottleneck, not the model.
railspostgreslanggraph.jsclaude apisnowflakeoauth 2.0 / pkcejavascripteval design