Senior Software Engineer — AI for Drug Discovery

Xaira Therapeutics; South San Francisco (CA); On-site; USD 189,000 - 245,000; Full time

Job summary

Xaira Therapeutics in South San Francisco seeks a backend/AI tooling engineer to join the X-Scientist team. You will build backend systems, APIs, tool-calling infrastructure, and workflows connecting AI models with biological tools and datasets.

The role emphasizes Python engineering, developer-facing SDKs and CLIs, and maintaining reliable, multi-step workflows. Collaboration with AI scientists and drug-discovery experts is essential.

Qualifications

• Strong Python engineering fundamentals and clean, tested code.
• Experience building production libraries, CLIs, APIs, SDKs, or backend services.
• Familiarity with LLM apps, agent frameworks, tool calling, or orchestration systems.

Responsibilities

• Develop backend systems and APIs connecting AI models to tools and data.
• Build tool-calling infrastructure, CLIs, SDKs, and workflow runners.
• Create agentic interfaces for analyses, inspection, and iteration of results.

Skills

Python engineering fundamentals

Backend/API development

Production libraries / CLI / API / SDK

LLM app development / agent frameworks

Complex systems handling

Strong communication

Tools

CLI

SDK

API

Backend service

Workflow system

Job description

Xaira Therapeutics in South San Francisco seeks a backend/AI tooling engineer to join the X-Scientist team. You will build backend systems, APIs, tool-calling infrastructure, and workflows connecting AI models with biological tools and datasets.

The role emphasizes Python engineering, developer-facing SDKs and CLIs, and maintaining reliable, multi-step workflows. Collaboration with AI scientists and drug-discovery experts is essential.