Staff Software Engineer: AI Agent APIs (Remote)

Scope3; United States; On-site; USD 180,000 - 230,000; Full time

Benefits offered by this job

Health, dental, vision coverage with.

401(k)/RRSP matching

Generous paid time off

Parental leave 13 weeks

Remote work setup stipend

Equity

Job summary

Scope3 is building the future of programmatic advertising with AI agents. As a technical leader, you will shape APIs, protocols, and agent interfaces that power our platform, designing systems where AI agents participate with authentication and clear contracts.

This 80/20 backend-leaning role involves hands-on coding, code reviews, mentoring, and setting technical direction in a fast-moving, cross-functional environment.

Qualifications

• 8+ years building distributed backend systems at scale.
• 4+ years in a technical leadership role.
• 4+ years working in the AdTech ecosystem.
• Strong expertise in API design and architecture (REST, event-driven, auth, versioning).
• Experience with AI agent frameworks or ability to rapidly learn.
• Proficiency with TypeScript/Node.js, React, and cloud platforms (GCP or AWS).
• Experience designing systems for autonomous decision-making.
• Mentoring engineers and fostering collaboration.
• Comfort working in fast-moving, evolving environments.

Responsibilities

• Design and architect scalable APIs for both human and AI agent clients
• Lead development of agent interfaces, MCP servers, and A2A communication layers
• Build and operate high-throughput systems for real-time advertising transactions
• Evaluate and integrate emerging agent frameworks and protocols
• Partner with product and design to define clear, agent-friendly API contracts
• Drive architectural decisions around authentication, protocols, and transaction flows
• Collaborate with external DSPs, SSPs, and agent platform partners
• Mentor engineers on API design, distributed systems, and agent architectures
• Anticipate and address edge cases in autonomous agent behavior

Skills

Distributed backend systems

Technical leadership

AdTech ecosystem

API design

TypeScript/Node.js

React

Cloud platforms

AI agent frameworks

Mentoring engineers

Fast-moving environments

Tools

PostgreSQL

BigQuery

Cloud Storage

Redis

Job description

Scope3 is building the future of programmatic advertising with AI agents. As a technical leader, you will shape APIs, protocols, and agent interfaces that power our platform, designing systems where AI agents participate with authentication and clear contracts.

This 80/20 backend-leaning role involves hands-on coding, code reviews, mentoring, and setting technical direction in a fast-moving, cross-functional environment.