Full-Time
Principal Software Engineer 6
Backend & Agentic Execution Platform
Posted on 2/21/2026
Comcast
10,001+ employees
Cable, internet, and networks provider
Compensation Overview
$176.5k - $277.4k/yr
Chicago, IL, USA + 1 more
More locations: Cherry Hills Village, CO, USA
In Person
Location options: Denver, CO or Chicago, IL.
 Software Engineering (1) |
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- Bachelor's or Master's degree in Computer Science, Engineering, or equivalent practical experience.
- 15+ years of experience 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.
- 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 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.
- 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.
- Platform & Architecture Leadership: Define the technical vision for Buyer Cloud’s next-generation backend, including APIs and MCP-based tool surfaces.
- Lead architecture for large-scale distributed systems with low latency, high throughput, and operational simplicity.
- Establish durable platform patterns: multi-tenant isolation and policy enforcement; safe rollout strategies; backward compatibility and API versioning.
- Agentic & AI-Ready Backend Systems: Design and implement systems that allow AI agents to safely take actions with clear authorization boundaries, auditing and traceability, rate limiting and cost controls, guardrails to prevent unsafe actions.
- Partner with data, ML, and product stakeholders to identify high leverage agent use cases in a DSP-as-a-service environment.
- Reliability, Observability, and Performance: Raise the bar on SLO-driven reliability and operational practices; champion observability; drive performance engineering across critical paths.
- Mentorship & Technical Culture: Mentor and grow senior engineers; set and model expectations for design docs, code review quality, and pragmatic engineering judgment; collaborate across teams to align roadmaps.
- Experience designing tooling APIs for automation (contracts, permissions, auditing, failure modes, safe retries).
- Familiarity with modern AI/agent patterns (tool calling, retrieval-augmented generation, evaluation/monitoring).
- Familiarity with MCP and standards ecosystems and how they change service boundaries and platform ergonomics.
- Mentorship experience mentoring senior engineers.
Comcast provides high-speed internet, cable television, and phone services to residential and business customers while also operating major media networks, film studios, and theme parks. The company delivers these services through its Xfinity and Sky brands and generates revenue by selling subscriptions, advertising space, and entertainment experiences. Unlike many competitors, Comcast controls both the distribution infrastructure and the content itself, allowing it to manage the entire pipeline from production to the consumer's home. Its goal is to use this integrated network to provide a wide range of media and technology services to a global audience.
Company Size
10,001+
Company Stage
IPO
Headquarters
Philadelphia, Pennsylvania
Founded
1963
Simplify's Take
What believers are saying
- Business Services Connectivity grew 5% to $9.7B in FY2024, targeting $50B market.
- Universal Epic Universe drove 24% theme parks revenue surge to $2.44B in Q1 2026.
- Wireless lines hit record 435K adds in Q1 2026, totaling 9.7 million lines.
What critics are saying
- Domestic broadband lost 2.99M customers year-over-year in Q1 2026 to AT&T fiber.
- Peacock losses doubled to $432M in Q1 2025, totaling over $1.2B cumulative.
- Media division lost $436M in Q1 2025 from $5B NBA and NFL rights costs.
What makes Comcast unique
- Comcast Business leverages 150,000 fiber route miles for 100 Gbps scalable capacity.
- Xfinity Mobile MVNO uses millions of owned WiFi hotspots atop Verizon towers.
- Universal Ads self-service platform unifies linear TV and streaming for 90% US households.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
401(k) Company Match
Paid Vacation
Paid Parental Leave
Tuition Reimbursement
Unlimited Paid Time Off
Company News
Streaming companies have pivoted from prioritising subscriber growth to profitability, raising prices, cracking down on password sharing and expanding ad-supported tiers. However, it remains unclear whether smaller players can achieve meaningful profits. Netflix leads the industry with a 29.5% operating margin in 2025 and 325 million global subscribers. Disney has guided towards a 10% direct-to-consumer operating margin for fiscal 2026, whilst Paramount and Warner Bros Discovery have posted profitable quarters and Comcast's Peacock is narrowing losses. Analysts question whether streaming can match the profitability of legacy linear TV businesses. Netflix raised prices again recently, with subscription plans now ranging from $7.99 to $26.99 monthly across the industry. The company reported over $1.5 billion in advertising revenue for 2025, expected to double this year.
Sumitomo Mitsui Trust Group has increased its stake in Comcast Corporation by 6.1% during the fourth quarter of 2025, according to a 13F filing with the Securities and Exchange Commission. The Japanese financial group now holds 11,729,109 shares worth approximately $328 million, representing about 0.32% of Comcast's outstanding shares. The acquisition, which added 669,231 shares to Sumitomo Mitsui's portfolio, signals continued institutional confidence in the cable and media conglomerate despite recent stock price volatility. Other major institutional investors, including Capital Research Global Investors and State Street Corp, also maintain significant positions in Comcast. The filing was submitted on 12 April 2026, reflecting the group's Q4 2025 holdings in the American telecommunications and media company.
Oak Thistle LLC acquired a new stake in Comcast Corporation during the fourth quarter of 2025, purchasing 44,273 shares valued at approximately $1.32 million. The investment was disclosed in a 13F filing with the Securities and Exchange Commission. The acquisition highlights continued institutional interest in the Philadelphia-based cable and media giant, which has a market capitalisation exceeding $100 billion. Comcast faces challenges in its cable and media businesses as the telecommunications and entertainment landscape evolves. The investment represents Oak Thistle LLC's entry into Comcast stock, reflecting broader institutional appetite for companies navigating the changing media and communications sector.
Comcast has expanded its multi-gigabit internet footprint across several US communities and launched "Total Solutions Advantage", an all-in-one connectivity and cybersecurity bundle for small businesses with predictable monthly pricing. The moves include rural and suburban network buildouts in New Hampshire, West Virginia, Georgia and Pennsylvania. The Total Solutions Advantage offering combines broadband, wireless and security services, aiming to deepen product penetration and create stickier customer relationships. However, investors must weigh rising capital intensity and intensifying competition from fibre and fixed-wireless providers. Comcast's investment narrative projects $128.7 billion revenue and $13.9 billion earnings by 2028, requiring 1.2% annual revenue growth. Some analysts forecast more cautious figures of $124.4 billion revenue and $11.2 billion earnings, citing broadband saturation and capital constraints.
Comcast is expected to report fiscal first-quarter earnings on 23 April, with analysts forecasting profit of $0.83 per share, down 23.9% year-over-year. The Philadelphia-based media and technology company has surpassed Wall Street's earnings expectations in its last four quarterly reports. For the full year, analysts expect earnings per share of $3.66, down 15.1% from fiscal 2025, though earnings are projected to rise 4.6% to $3.83 in fiscal 2027. Comcast shares have fallen 21.1% over the past year, underperforming the S&P 500's 13.7% gain. The stock rose 2.9% after its fourth-quarter results beat expectations in January. Analysts maintain a cautious "Hold" rating, with a consensus price target of $33.45, indicating potential upside of 15.7%.