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About the Role

Xaira is pioneering an AI-native approach to discovering and developing the next generation of life-changing medicines. The X-Scientist team makes AI-assisted science reliable, usable, and scalable across drug discovery workflows by working at the intersection of AI, software engineering, and therapeutic discovery. You will collaborate closely with AI scientists, engineers, platform teams, and drug discovery experts to build systems that connect AI models, biological tools, datasets, and scientific workflows.

Responsibilities

Build backend systems and APIs that connect AI models to scientific tools, datasets, and analysis workflows.
Develop tool-calling infrastructure, CLIs, SDKs, and workflow runners for scientists and ML researchers.
Create agentic interfaces for running analyses, inspecting intermediate steps, and iterating on results.
Implement observability and testing for long-running workflows that call external tools and produce scientific outputs.
Design reliable systems for long-running, multi-step workflows with strong testing, observability, logging, and maintainability.
Collaborate with scientific and technical teams to translate complex research workflows into usable, extensible software.

Requirements

Strong Python engineering fundamentals with clean, typed, tested, maintainable code.
Experience building at least one of the following: a production library, CLI, API, SDK, backend service, workflow system, or developer platform.
Familiarity with LLM application development, agent frameworks, tool calling, MCP-style interfaces, or orchestration systems.
Comfort working with complex systems combining multiple components, external calls, domain-specific logic, and evolving user needs.
Good instincts for abstraction, error handling, reliability, and designing software that can grow across use cases.
Strong communication skills and ability to work in a collaborative, multidisciplinary environment.

Skills

Python
LLM application development
Agent frameworks
Tool calling
MCP-style interfaces
Orchestration systems
Software design
Error handling
Reliability
Abstraction

Location

San Francisco Bay Area
Seattle
London

Work Type

Full-time

Experience Level

Mid-level
Senior

Salary/Compensations

$140,000 - $215,000 annually

Benefits

Competitive compensation and benefits package
Base salary
Bonus
Equity

About the Company

Xaira is an innovative biotech startup focused on leveraging AI to transform drug discovery and development.
The company is leading the development of generative AI models to design protein and antibody therapeutics, enabling the creation of medicines against historically hard-to-drug molecular targets.
It is also developing foundation models for biology and disease to enable better target elucidation and patient stratification.
Collectively, these technologies aim to continually enable the identification of novel therapies and to improve success in drug development.

Equal Opportunity

Xaira Therapeutics is an equal-opportunity employer.
We believe that our strength is in our differences.
Our goal to build a diverse and inclusive team began on day one, and it will never end.