Staff Software Engineer, Agentic Marketplace

About Scope3

Scope3 is redefining advertising for an AI-first world, building the foundation for agentic advertising that connects brands with their audiences—wherever they are. Brand agents on the Scope3 platform drive measurably better media outcomes while enabling safe and sustainable growth. Our partners include leading advertisers, agencies, publishers, and platforms across the entire media ecosystem.

We’re a venture backed company of 65 folks distributed across the globe. We are fortunate to be led by an experienced leadership team, many of whom designed and engineered the digital advertising landscape as we know it today. The company secured $20M in Series B funding led by GV in Oct 2023 (additional investors include Venrock, Rucker Park, Room40 Ventures, and Craft Ventures), and we are thrilled to be the recipient of an additional round of $25M in Oct 2024. Scope3 has significant market traction with more than 150+ customers and is experiencing accelerated growth.

Scope3 is a fully remote company and largely asynchronous with teams across North America, Europe, and APAC.

About the Role

We’re building the future of programmatic advertising through AI agents. Our Agentic Marketplace team is creating the infrastructure that enables AI agents to discover, negotiate, and transact media inventory autonomously.

In this role, you’ll be a technical leader responsible for the APIs, protocols, and agent interfaces that power our agentic advertising platform. You’ll design systems where AI agents are first-class participants, with their own authentication, capabilities, and communication standards.

You’ll work at the intersection of advertising technology, distributed systems, and emerging AI agent frameworks—making architectural decisions that shape how our marketplace evolves.

This is a hands-on leadership role. You’ll write production code, prototype new agent communication patterns, review system designs, and mentor engineers while setting technical direction.

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

Qualifications:

• 8+ years building distributed backend systems at scale
• 4+ years in a technical leadership role
• Strong expertise in API design and architecture (REST, event-driven systems, auth, versioning)
• Experience with AI agent frameworks and communication protocols, or the ability to rapidly learn and evaluate them
• Proficiency with TypeScript/Node.js, and cloud platforms (GCP or AWS)
• Experience designing systems for autonomous or semi-autonomous decision-making
• Track record of mentoring engineers and fostering a collaborative team culture
• Comfort working in fast-moving, evolving environments

Nice to Have:

• Experience in advertising technology is a strong plus
• Familiarity with MCP, A2A, or similar standards

Tech Stack:

• API Layer: TypeScript/Node.js, REST and event-driven services
• Agent Interfaces: MCP servers and A2A protocol handlers
• Data: PostgreSQL, BigQuery, Cloud Storage, Redis

As the agent ecosystem evolves, you’ll help evaluate new technologies and ensure our marketplace remains at the forefront.

Compensation:

The salary range for this role is $160k-$230k USD / $170k-$225k CAD.

These ranges span multiple location-based salary bands across the US and Canada. Candidates are aligned to a narrower range based on geographic market compensation data specific to where they live, and final offers reflect demonstrated skills, experience, and role expectations.

Benefits & Perks:
Details vary by location (USA/Canada), but all employees receive:

• Health & wellness: Comprehensive medical, dental, and vision coverage with significant employer contribution; short- and long-term disability coverage; health savings/flexible spending options
• Retirement: Employer-matched retirement savings plan (401(k) or RRSP)
• Time off: Generous paid time off, statutory holidays, and year-end office closure
• Parental leave: 13 weeks fully paid (eligibility requirements apply)
• Remote work: Company-provided home office equipment, setup stipend, and access to WeWork spaces
• Equity: Stock options for eligible roles

Our Culture & Values

• Passion for the environment and climate work. We are a mission-driven company, and this is what motivates us to work hard and deliver outcomes for our customers. 
• Clear and empathetic communication, especially while working asynchronously. We have always been a global, remote-first company and we collaborate using Notion, Miro, Slack, Loom, and other tools. 
• We celebrate healthy conflict in the workplace; we focus on the solutions and we move on quickly. 
• The ability and accountability to deliver what we promise. We do what we say we will do, and we don’t make promises we can’t keep. 
• Experience driving systemic change. Our mission is to make advertising and AI more effective for the economy and the environment, and this requires a holistic approach to re-imagining and inspiring an industry movement at a global scale. 

A Note To Applicants

We believe that all people are capable of great things. We encourage you to apply even if you do not meet all of the requirements that are listed within this job description.