# Senior Software Engineer, Agentic Search at Ironclad

- Company: Ironclad
- What the company does: Backed by Accel, Sequoia and Y Combinator.
- Company website: http://www.ironcladapp.com
- Type: Startups (AI role)
- Level: Senior
- Location: San Francisco
- Work setup: Remote
- Pay: $180K to $220K base salary per year (USD)
- Posted: 2026-09-18
- Apply by: 2026-11-02
- Apply: https://jobs.ashbyhq.com/ironcladhq/fa6f1cdc-4e73-4041-a8cc-aeb26a75e647
- Page: https://www.1752.vc/careers/jobs/ironclad-senior-software-engineer-agentic-search/

## About the role

Agentic search systems : Evolve the architecture that combines LLM and retrieval system to produce optimal answer for complex or ambiguous questions. Eval-driven development : Design and run the benchmarks and experiments that measure search quality, and use that feedback to improve the system.

## What they're looking for

- 4 years experience building production systems, with hands-on experience in search, information retrieval, content understanding or recommendation systems at meaningful scale
- Demonstrated expertise in one of: learned/hybrid retrieval (lexical + vector + reranking), query understanding/NLU pipelines, or production LLM agent systems — ideally more than one
- Experience with search frameworks (Elasticsearch or equivalent — Solr, Vespa, OpenSearch, embedding search) in production, including relevance tuning and reranking
- Fluency with modern LLM APIs and multi-provider orchestration (Anthropic, OpenAI, Google) — reasoning about token budgets, provider-specific tool-calling semantics, and prompt-caching trade-offs
- Experience building eval-driven workflow — offline benchmarks, regression detection, structured A/B comparison — as opposed to shipping and hoping
- Strong ownership and communication

Tags: Engineering, Product & Design