AI Agent Systems Engineer - Fullstack

Writer; Seattle (WA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Generous PTO

Medical, dental, and vision coverage

Parental leave (16 weeks)

Fertility and family planning support

Galleri cancer testing

FSA/HSA options

Annual work-life stipends

Company stock options and 401k

Team off-sites

Job summary

Writer is seeking a highly skilled fullstack software engineer to build AI-driven agent systems that automate enterprise workflows and integrate with data and services. You will join a fast-paced team, designing, implementing, and scaling production-ready, secure agent-enabled software across the stack.

You will collaborate with researchers, engineers, and product managers to translate complex agent concepts into robust solutions, with an emphasis on reliability, observability, and scalable

Qualifications

• 3+ years of professional software engineering experience in Python production environments.
• Experience with native agentic coding using tools like Cursor, Claude Code, and similar platforms.
• Proven track record building distributed systems, microservices, or complex backend APIs for AI/agent workflows.
• Solid experience with AI models integration, agent frameworks, vector databases, and large-context reasoning services.

Responsibilities

• Design, implement, and maintain scalable, secure agent-driven services that autonomously accomplish tasks using modern AI frameworks.
• Develop and enhance high-throughput APIs and infrastructure for agent capabilities, including memory, channels, and security.
• Integrate agent capabilities with backend services, data stores, vector databases, and external APIs.
• Collaborate with product managers, AI researchers, data engineers, and UX teams to translate use cases into production-ready software.
• Ensure reliability, monitoring, and observability for all agent components (metrics, logging, CI/CD, fault tolerance).
• Contribute to architectural decisions and participate in code reviews to uphold quality.

Skills

Python

Agentic coding

Distributed systems

Backend APIs

Agent frameworks

Cloud platforms

Docker/Kubernetes

CI/CD

React/TypeScript

Open-source contributions

Tools

Cursor

Claude Code

Langraph

Agent Harness

AWS

GCP

Azure

Docker

Kubernetes

Job description

Writer is seeking a highly skilled fullstack software engineer to build AI-driven agent systems that automate enterprise workflows and integrate with data and services. You will join a fast-paced team, designing, implementing, and scaling production-ready, secure agent-enabled software across the stack.

You will collaborate with researchers, engineers, and product managers to translate complex agent concepts into robust solutions, with an emphasis on reliability, observability, and scalable