# Software Engineer - AI Agents & Platform

**Company:** [Assembled](https://hotfix.jobs/companies/assembled)
**Location:** San Francisco, CA
**Role:** ML Engineering
**Salary:** $135k – $280k/yr
**Experience:** 5+ years
**Skills:** LLMs, Go, RAG, Vector Search, Hybrid Search, Reciprocal Rank Fusion, Stt, Tts, Workflow Builder
**Posted:** 2026-04-16

> Builds autonomous AI agents and platform infrastructure for customer support, enhancing LLM performance with RAG techniques, scaling systems with Golang, and integrating STT/TTS. Requires 5+ years software engineering experience with LLMs.

## Job Description

## Responsibilities
- Build foundational new features: Develop product features from the ground up, such as implementing a way to analyze gaps in a company's knowledge base with LLMs and building sophisticated information collection techniques with cutting edge STT and TTS.
- Help design and build a workflow builder that distills the complexity of workflows into a simple, intuitive interface.
- Improve LLM model results: Enhance our retrieval augmented generation engine using techniques like vector search, document re-ranking, and hypothetical document embeddings.
- Leverage implicit knowledge bases like past tickets and macros to improve model performance.
- Develop LLM Infrastructure: Architect the abstractions that enable the integration of various types of LLMs tailored for different applications.
- Design and implement evaluation and logging systems to monitor performance and build interfaces that expand our platform's capabilities.
- Engage with customers: Collaborate with our customers (both support agents and managers) to understand their needs.
- Wear many hats: Be versatile in roles — coding, user research, planning, brainstorming, interviewing, and cross-team collaboration.
- Shape the team culture: Encourage a startup mentality.

## Requirements
- 5+ years of experience in software engineering as an individual contributor.
- Have worked with LLMs and are excited to dive into them every day.

## Nice-to-Haves
- Experience contributing in startups or smaller companies.
- Experience scaling LLMs with Golang.
- Experience enhancing RAG results with Reciprocal Rank Fusion and Hybrid Search.
- Experience pioneering new LLM evaluation techniques.

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**Apply:** https://hotfix.jobs/jobs/fbb24816-2173-4472-bbce-7693478fe2c5
**Canonical:** https://hotfix.jobs/jobs/fbb24816-2173-4472-bbce-7693478fe2c5