Principal Software Engineer 6 - (Backend & Agentic Execution Platform)

• Collaborates with project stakeholders to identify product and technical requirements. Conducts analysis to determine integration needs.
• Designs and oversees new software and web applications supports applications under development and customizes current applications. Develops software update processes for existing applications. Assists and oversees in the roll-out of software releases.
• Trains and mentors software development engineers on internally developed software applications and software development best practices.
• Oversees the researching writing and editing of documentation and technical requirements including software designs evaluation plans test results technical manuals and formal recommendations and reports.
• Keeps current with technological developments within the industry. Monitors and evaluates competitive applications and products. Reviews literature patents and current practices relevant to the solution of assigned projects.
• Provides technical leadership throughout the design process and provides guidance with regards to practices procedures and techniques. Serves as a guide and mentor for junior level Software Development Engineers.
• Assists in tracking; provides and evaluates performance metrics. Ensures team delivers software on time to specification and within budget.
• Works with Quality Assurance team to determine if applications fit specification and technical requirements. Tests and evaluates systems subsystems and components.
• Leads project planning resourcing requirement analyzing and defining detailed designing and deployment of feature or system.
• Presents and defends architectural design and technical choices to internal and external audiences.
• Consistent exercise of independent judgment and discretion in matters of significance.
• Regular consistent and punctual attendance. Must be able to work nights and weekends variable schedule(s) and overtime as necessary.
• Other duties and responsibilities as assigned.

• Collaborates with project stakeholders to identify product and technical requirements. Conducts analysis to determine integration needs.

• Designs and oversees new software and web applications supports applications under development and customizes current applications. Assists and oversees in the roll-out of software releases.

• Trains and mentors software engineers on internally developed software applications and software development best practices.

• Oversees the researching writing and editing of documentation and technical requirements including software designs evaluation plans test results technical manuals and formal recommendations and reports.

• Keeps current with technological developments within the industry. Monitors and evaluates competitive applications and products. Reviews literature patents and current practices relevant to the solution of assigned projects.

• Provides technical leadership throughout the design process and provides guidance with regards to practices procedures and techniques. Serves as a guide and mentor for junior level Software Development Engineers.

• Assists in tracking; provides and evaluates performance metrics. Ensures team delivers software on time to specification and within budget.

• Works with Quality Assurance team to determine if applications fit specification and technical requirements. Tests and evaluates systems subsystems and components.

• Leads project planning resourcing requirement analyzing and defining detailed designing and deployment of feature or system.

• Presents and defends architectural design and technical choices to internal and external audiences.

• Consistent exercise of independent judgment and discretion in matters of significance.

• Define the technical vision for Buyer Cloud's next-generation backend including how we expose platform capabilities through APIs and MCP-based tool surfaces.

• Lead architecture and design for large-scale distributed systems with a focus on low latency high throughput and operational simplicity.

• Establish durable platform patterns for:

• Multi-tenant isolation and policy enforcement

• Safe rollout strategies (feature flags canaries progressive delivery)

• Backward compatibility and API versioning for internal and external consumers

• Design and implement systems that allow AI agents to safely take actions (e.g. configuration changes diagnostics workflow execution) with:

• Clear authorization boundaries

• Auditing and traceability

• Rate limiting and cost controls

• Guardrails to prevent unsafe or unintended actions

• Partner with data ML and product stakeholders to identify "high leverage" agent use cases in a DSP-as-a-service environment (e.g. troubleshooting campaign setup assistance forecasting/insight workflows operational automation).

• Raise the bar on SLO-driven reliability and operational practices (incident response postmortems automation on-call health).

• Champion best-in-class observability: metrics tracing structured logging and actionable alerting.

• Drive performance engineering across critical paths (bidding/decisioning adjacent services pacing reporting pipelines and platform APIs).

• Mentor and grow senior engineers and emerging technical leaders.

• Set and model expectations for design docs decision logs code review quality and pragmatic engineering judgment.

• Collaborate across teams to align roadmaps and unblock delivery.

• An ethic of service and a belief in putting the customer first.

• Pragmatism about what must be correct now versus what must be correct later.

• Curiosity and a builder mindset especially in rapidly evolving technical areas.

• Repeatability resilience observability and operational simplicity.

• Clear communication and strong partnership across engineering product and business stakeholders.

• Bachelor's or Master's degree in Computer Science Engineering or equivalent practical experience.

• 15+ years building and operating scalable distributed systems; ad tech / media / programmatic experience strongly preferred.

• Deep expertise in system design and technical architecture including ownership of complex systems in production.

• Strong coding ability in one or more of: Python Java Go C++ (performance concurrency and distributed computing).

• Experience building and operating cloud-native services on AWS (or equivalent) including infrastructure-as-code.

• Demonstrated ability to own and manage technical backlogs influence prioritization and drive execution across multiple teams.

• Experience designing "tooling" APIs intended for automation (human and machine clients) including careful consideration of:

• Contracts and stability

• Permissions and policy

• Auditing and compliance

• Failure modes and safe retries

• Familiarity with modern AI/agent patterns (tool calling RAG evaluation/monitoring) and a point of view on where agentic systems will and will not work in production.

• Experience (or strong interest) in standards and ecosystems like MCP and how they change service boundaries and platform ergonomics.

• An ethic of service and a belief in putting the customer first

• A powerful sense of pragmatism to figure out what needs to be done right versus right now.

• A curiosity about technology and a desire to use it to solve problems in all sorts of domains.

• An openness to feedback and more than just the spelling skills to know that there's no I in "team."

• An appreciation of repeatability resilience observability and operational simplicity.

• A bachelor's or master's degree in computer science engineering or a related technical field or equivalent practical experience.

• 15+ years of experience as a hands-on software engineer with a deep focus on designing and building scalable distributed systems. Experience in the media or advertising technology industry is a must-have.

• Proven expertise in technical architecture and system design with the ability to break down complex problems and deliver elegant maintainable solutions.

• Demonstrated ability to own and manage technical backlogs collaborating with product and engineering peers to prioritize work define technical requirements and drive execution.

• Advanced proficiency in object-oriented and systems programming languages such as C++ Java Python or Go with a strong understanding of concurrency performance tuning and distributed computing.

• Experience deploying and operating applications in public cloud environments (e.g. AWS GCP Azure) with a solid grasp of cloud-native development patterns and infrastructure-as-code.

• Comfortable using engineering productivity tools such as Jira (for backlog and sprint planning) Confluence (for technical documentation) Git (for version control) and Microsoft Office Suite (for communication and reporting).

• Understand our Operating Principles; make them the guidelines for how you do your job.
• Own the customer experience - think and act in ways that put our customers first give them seamless digital options at every touchpoint and make them promoters of our products and services.
• Know your stuff - be enthusiastic learners users and advocates of our game-changing technology products and services especially our digital tools and experiences.
• Win as a team - make big things happen by working together and being open to new ideas.
• Be an active part of the Net Promoter System - a way of working that brings more employee and customer feedback into the company - by joining huddles making call backs and helping us elevate opportunities to do better for our customers.
• Drive results and growth.
• Support a culture of inclusion in how you work and lead.
• Do what's right for each other our customers investors and our communities.

• This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties responsibilities and qualifications.

What We Do

Welcome to Comcast. From the connectivity and platforms we provide to the content and experiences we create we bring people together globally. Our people think the world of our work and that’s why our work is the best in the world.

Why Work With Us

We believe you can achieve extraordinary things when you feel connected - to the work you do and who you do it with. From the platforms we provide to millions of people to the content and experiences we create - we bring our customers viewers and teammates closer together across the globe.