Scope3

Role Description 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. As a Senior Software Engineer, you’ll play a key role in building the core systems that power our agentic advertising platform. You’ll develop APIs, agent interfaces, and transaction systems that support both human users and AI agents as first-class participants. You’ll work at the intersection of advertising technology, distributed systems, and emerging AI agent frameworks—helping translate architectural vision into scalable, production-ready systems. This is a Fullstack (80/20 backend leaning), hands-on role. You’ll write production code, contribute to system design, and collaborate closely with a small, senior team to bring new agent-driven capabilities to life. Responsibilities - Build and maintain scalable APIs for both human and AI agent clients - Contribute to the development of 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 Qualifications - 5+ years of experience building backend or fullstack systems - Strong experience with API development (REST or event-driven systems) - Proficiency in TypeScript/Node.js and React - Experience working 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 Nice to have - Experience with MCP, A2A, or similar communication protocols - Background in advertising technology or marketplace platforms - Experience building systems with real-time or high-throughput requirements 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 Compensation The salary range for this role is $130k-$190k USD; $140k-$200k 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, and final offers reflect demonstrated skills, experience, and role expectations. Benefits - 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) - Equity: Stock options 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.

About Scope3 Scope3 is the industry’s leading collaborative sustainability platform. By modeling the complex digital advertising supply chain, we help brands measure and dramatically reduce digital waste to reduce carbon emissions from advertising and increase the efficacy of advertising investment. This is an exceptional opportunity to build a company alongside great people and make a difference in one of the most important issues facing the planet: the climate crisis. 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 to provide flexible working hours and to operate globally, with concentrations in New York and Europe. At this time, we are hiring in Canada, Australia, UK, France, Germany, and the United States. 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: 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.