Senior Software Engineer, W&B Agent - W&B

Weights & Biases; Bellevue (WA); On-site; USD 150,000 - 230,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Company-paid Life Insurance

Voluntary supplemental life insurance

Short and long-term disability

Flexible Spending Account

Health Savings Account

Tuition Reimbursement

Employee Stock Purchase Program (ESPP)

Mental Wellness Benefits

Paid Parental Leave

Childcare support

401(k) with employer match

Flexible PTO

Catered lunch

Job summary

Weights & Biases is seeking a hands-on full stack engineer to own features across the ARIA AI research agent, covering backend infrastructure, API design, and a React frontend. You will build and maintain distributed worker systems and streaming architectures to deliver real-time AI agent experiences.

Candidates should have 4+ years of full stack experience with Python (FastAPI, Kubernetes) and TypeScript/React, and a security-minded approach to code execution and data hardening.

Qualifications

• Requires 4+ years of full stack experience with Python and TypeScript/React.
• Experience operating services at scale with a security-conscious mindset regarding code execution and data hardening.
• Strong knowledge of API design and streaming architectures.

Skills

Python

React

TypeScript

FastAPI

Kubernetes

MySQL

Distributed Systems

API Design

Streaming

Observability

Sandboxed Code

Async Patterns

State Management

AI Agents

Reliability

Job description

Own features across the full stack for the ARIA AI research agent, from backend infrastructure and API design to the React frontend. Build and maintain distributed worker systems and streaming architectures to deliver real-time AI agent experiences.

Requirements: Requires 4+ years of full stack experience with deep proficiency in Python (FastAPI, Kubernetes) and TypeScript/React. Candidates should have experience operating services at scale and a security-conscious mindset regarding code execution and data hardening.

Key Skills: Python, React, TypeScript, FastAPI, Kubernetes, MySQL, Distributed Systems, API Design, Streaming Architecture, Observability Tooling, Sandboxed Code Execution, Full Stack Engineering, AI Agents, Async Patterns, State Management, Reliability Engineering

Benefits: Medical insurance, Dental insurance, Vision insurance, Company-paid Life Insurance, Voluntary supplemental life insurance, Short and long-term disability insurance, Flexible Spending Account, Health Savings Account, Tuition Reimbursement, Employee Stock Purchase Program (ESPP), Mental Wellness Benefits, Paid Parental Leave, Childcare support, 401(k) with employer match, Flexible PTO, Catered lunch