Senior Software Engineer, AI Agentic Ad Marketplace | Equity

Scope3; United States; Remote; USD 130,000 - 190,000; Full time

Benefits offered by this job

Health & wellness

Retirement plan

Generous time off

Parental leave

Equity

Job summary

Scope3 is building the future of programmatic advertising through AI agents. We’re seeking a Senior Software Engineer to build core systems powering our agentic platform, including APIs, interfaces, and transaction layers for human and AI agents.

You’ll work in a small, senior team, delivering scalable backend and frontend elements with a 80/20 backend emphasis, focusing on real-time advertising transactions and robust architectures.

Qualifications

• 5+ years of experience building backend or fullstack systems.
• Strong experience with API development (REST or event-driven).
• Proficiency in TypeScript/Node.js and React.
• Experience with cloud platforms (GCP or AWS).
• Familiarity with distributed systems concepts (scalability, reliability, observability).
• Interest in or exposure to AI agent systems, LLMs, or autonomous workflows.
• Ability to collaborate effectively in a small, fast-moving team.
• Strong problem-solving skills and attention to detail.

Responsibilities

• Build and maintain scalable APIs for both human and AI agent clients.
• Contribute to agent interfaces, MCP servers, and A2A communication layers.
• Implement systems that support real-time advertising transactions at scale.
• Partner with Staff engineers to design robust, extensible architectures.
• Collaborate with product and design to develop clear, agent-friendly API contracts.
• Integrate and experiment with emerging agent frameworks and protocols.
• Participate in design reviews and provide thoughtful technical input.
• Write high-quality, maintainable code and improve system reliability.
• Identify edge cases in agent behavior and help design safeguards.

Skills

Backend/Fullstack experience

API development

TypeScript/Node.js

React

Cloud platforms

Distributed systems

AI agent familiarity

Collaboration

Problem-solving

Tools

MCP servers

A2A protocol handlers

PostgreSQL

BigQuery

Cloud Storage

Redis

Job description

Scope3 is building the future of programmatic advertising through AI agents. We’re seeking a Senior Software Engineer to build core systems powering our agentic platform, including APIs, interfaces, and transaction layers for human and AI agents.

You’ll work in a small, senior team, delivering scalable backend and frontend elements with a 80/20 backend emphasis, focusing on real-time advertising transactions and robust architectures.