H-1B Visa Senior Python Engineer Jobs
Senior Python Engineer roles qualify as H-1B specialty occupations under the computer occupations category, requiring at least a bachelor's degree in computer science or a related field. Most employers filing H-1B petitions for this role fall under the cap-subject category, making October 1 the earliest start date after a successful lottery selection.
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Get Access To All JobsINTRODUCTION
Make your mark at Comcast - a Fortune 30 global media and technology company. From the connectivity and platforms we provide, to the content and experiences we create, we reach hundreds of millions of customers, viewers, and guests worldwide. Become part of our award-winning technology team that turns big ideas into cutting-edge products, platforms, and solutions that our customers love. We create space to innovate, and we recognize, reward, and invest in your ideas, while ensuring you can proudly bring your authentic self to the workplace. Join us. You’ll do the best work of your career right here at Comcast. (In most cases, Comcast prefers to have employees on-site collaborating unless the team has been designated as virtual due to the nature of their work. If a position is listed with both office locations and virtual offerings, Comcast may be willing to consider candidates who live greater than 100 miles from the office for the remote option.)
JOB SUMMARY
We are looking for a Senior Software Engineer to lead the technical direction of our AI Agent initiatives. This is a backend engineering role first, focused on building scalable, reliable systems that happen to use modern AI techniques. You will architect and operate production-grade backend services and agentic workflows that solve complex, non-deterministic problems. While LLMs are a core capability, success in this role comes from strong systems thinking, designing for correctness, observability, failure recovery, and long-term maintainability. You will serve as a technical anchor for the team—mentoring junior engineers, setting engineering standards, and working with leadership to turn AI concepts into dependable, customer-facing systems. Level machine learning expertise and innovation capacity are essential.
JOB DESCRIPTION
What You Will Do
Architectural Leadership
- Design and own scalable backend architectures and complex agent-driven workflows. This includes service boundaries, data flows, failure handling, observability, and performance characteristics—not just model interaction.
Agent Behavior Engineering (Not Just Prompting)
- Design and productionize agent behaviors including tool invocation, state management, memory strategies, and reasoning control. Prompts are treated as code: versioned, tested, reviewed, and evolved alongside backend logic for reliability, cost, and latency.
Systemic Quality & Code Health
- Set the bar for clean, readable, maintainable code across the Python backend. Establish patterns and standards that allow AI-heavy systems to remain understandable and operable over time.
Testing & Evaluation of Probabilistic Systems
- Design testing strategies for non-deterministic AI components, including behavioral regression testing, automated evaluations, and guardrails that reduce blast radius in production.
Technical Mentorship
- Lead code reviews as a teaching tool, run architectural discussions, and actively mentor Engineer 1–2 developers in backend fundamentals, system design, and operational thinking.
Operational Excellence & Production Ownership
- Own CI/CD, deployment, and runtime health. Lead production support efforts and help build a strong on-call culture where systems are observable, diagnosable, and resilient under real-world load.
Customer-Facing Engineering
- Partner with product and design to deliver high-traffic, customer-facing experiences where AI responses must meet clear standards for latency, reliability, and UX—not just correctness.
Cross-Functional Technical Leadership
- Translate product goals into pragmatic technical roadmaps, identifying scaling risks, technical debt, and AI-specific failure modes early.
Advanced Debugging & Incident Leadership
- Lead investigations into complex issues spanning multiple services, data pipelines, or emergent agent behaviors in production.
WHAT WE’RE LOOKING FOR
Senior Backend Engineering Depth
- Extensive experience designing, building, and operating backend systems in Python, including asynchronous frameworks (FastAPI, asyncio) and distributed service architectures.
Production Experience at Scale
- A track record of owning customer-facing systems in production. You understand uptime, latency budgets, incident response, and the cost of unreliable behavior.
AI Systems Intuition
- Hands-on experience integrating LLMs into real systems, with a clear understanding of their limitations, failure modes, and operational risks. You think in terms of workflows, control flow, and safeguards—not just prompt quality.
Agent & Tooling Experience
- Experience building AI agents that interact with tools, APIs, and external systems, including managing agent state, bounding autonomy, and preventing pathological behaviors (loops, hallucinations, cascading failures).
Support & Reliability Mindset
- Comfortable being responsible for systems after launch. You design software that is “easy to wake up to” when something goes wrong.
Strong System Design Skills
- Experience with microservices, data stores, queues, and high-throughput APIs—and the judgment to keep designs as simple as possible.
Mentorship & Engineering Culture
- A desire to raise the bar for those around you through feedback, example, and thoughtful technical leadership.
Pragmatism
- You enjoy leveraging advanced AI capabilities, but you prioritize stability, debuggability, and long-term maintainability over novelty.
Disclaimer: 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.
Comcast is an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.
Skills:
- Adaptability
- Critical Thinking
- Curious Mindset
- Customer-Oriented
- Python (Programming Language)
Salary:
Primary Location Pay Range: $168,328.72 - $252,493.08
Comcast intends to offer the selected candidate base pay within this range, dependent on job-related, non-discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.
Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Comcast provides best-in-class Benefits to eligible employees. We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That’s why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality - to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the compensation and benefits summary on our careers site for more details.
Education
Bachelor's Degree
While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience.
Relevant Work Experience
7-10 Years
INTRODUCTION
Make your mark at Comcast - a Fortune 30 global media and technology company. From the connectivity and platforms we provide, to the content and experiences we create, we reach hundreds of millions of customers, viewers, and guests worldwide. Become part of our award-winning technology team that turns big ideas into cutting-edge products, platforms, and solutions that our customers love. We create space to innovate, and we recognize, reward, and invest in your ideas, while ensuring you can proudly bring your authentic self to the workplace. Join us. You’ll do the best work of your career right here at Comcast. (In most cases, Comcast prefers to have employees on-site collaborating unless the team has been designated as virtual due to the nature of their work. If a position is listed with both office locations and virtual offerings, Comcast may be willing to consider candidates who live greater than 100 miles from the office for the remote option.)
JOB SUMMARY
We are looking for a Senior Software Engineer to lead the technical direction of our AI Agent initiatives. This is a backend engineering role first, focused on building scalable, reliable systems that happen to use modern AI techniques. You will architect and operate production-grade backend services and agentic workflows that solve complex, non-deterministic problems. While LLMs are a core capability, success in this role comes from strong systems thinking, designing for correctness, observability, failure recovery, and long-term maintainability. You will serve as a technical anchor for the team—mentoring junior engineers, setting engineering standards, and working with leadership to turn AI concepts into dependable, customer-facing systems. Level machine learning expertise and innovation capacity are essential.
JOB DESCRIPTION
What You Will Do
Architectural Leadership
- Design and own scalable backend architectures and complex agent-driven workflows. This includes service boundaries, data flows, failure handling, observability, and performance characteristics—not just model interaction.
Agent Behavior Engineering (Not Just Prompting)
- Design and productionize agent behaviors including tool invocation, state management, memory strategies, and reasoning control. Prompts are treated as code: versioned, tested, reviewed, and evolved alongside backend logic for reliability, cost, and latency.
Systemic Quality & Code Health
- Set the bar for clean, readable, maintainable code across the Python backend. Establish patterns and standards that allow AI-heavy systems to remain understandable and operable over time.
Testing & Evaluation of Probabilistic Systems
- Design testing strategies for non-deterministic AI components, including behavioral regression testing, automated evaluations, and guardrails that reduce blast radius in production.
Technical Mentorship
- Lead code reviews as a teaching tool, run architectural discussions, and actively mentor Engineer 1–2 developers in backend fundamentals, system design, and operational thinking.
Operational Excellence & Production Ownership
- Own CI/CD, deployment, and runtime health. Lead production support efforts and help build a strong on-call culture where systems are observable, diagnosable, and resilient under real-world load.
Customer-Facing Engineering
- Partner with product and design to deliver high-traffic, customer-facing experiences where AI responses must meet clear standards for latency, reliability, and UX—not just correctness.
Cross-Functional Technical Leadership
- Translate product goals into pragmatic technical roadmaps, identifying scaling risks, technical debt, and AI-specific failure modes early.
Advanced Debugging & Incident Leadership
- Lead investigations into complex issues spanning multiple services, data pipelines, or emergent agent behaviors in production.
WHAT WE’RE LOOKING FOR
Senior Backend Engineering Depth
- Extensive experience designing, building, and operating backend systems in Python, including asynchronous frameworks (FastAPI, asyncio) and distributed service architectures.
Production Experience at Scale
- A track record of owning customer-facing systems in production. You understand uptime, latency budgets, incident response, and the cost of unreliable behavior.
AI Systems Intuition
- Hands-on experience integrating LLMs into real systems, with a clear understanding of their limitations, failure modes, and operational risks. You think in terms of workflows, control flow, and safeguards—not just prompt quality.
Agent & Tooling Experience
- Experience building AI agents that interact with tools, APIs, and external systems, including managing agent state, bounding autonomy, and preventing pathological behaviors (loops, hallucinations, cascading failures).
Support & Reliability Mindset
- Comfortable being responsible for systems after launch. You design software that is “easy to wake up to” when something goes wrong.
Strong System Design Skills
- Experience with microservices, data stores, queues, and high-throughput APIs—and the judgment to keep designs as simple as possible.
Mentorship & Engineering Culture
- A desire to raise the bar for those around you through feedback, example, and thoughtful technical leadership.
Pragmatism
- You enjoy leveraging advanced AI capabilities, but you prioritize stability, debuggability, and long-term maintainability over novelty.
Disclaimer: 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.
Comcast is an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.
Skills:
- Adaptability
- Critical Thinking
- Curious Mindset
- Customer-Oriented
- Python (Programming Language)
Salary:
Primary Location Pay Range: $168,328.72 - $252,493.08
Comcast intends to offer the selected candidate base pay within this range, dependent on job-related, non-discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.
Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Comcast provides best-in-class Benefits to eligible employees. We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That’s why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality - to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the compensation and benefits summary on our careers site for more details.
Education
Bachelor's Degree
While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience.
Relevant Work Experience
7-10 Years
See all 38+ Senior Python Engineer jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Senior Python Engineer roles.
Get Access To All JobsTips for Finding H-1B Visa Sponsorship as a Senior Python Engineer
Match your resume to specialty occupation criteria
USCIS evaluates whether a Senior Python Engineer role genuinely requires a specific degree. Tailor your resume to reflect work that demands a computer science or engineering background, not just scripting tasks any generalist could perform.
Use OFLC Wage Search before negotiating offers
Your employer must pay at least the prevailing wage for your SOC code and work location. Pull the Level III or IV wage from OFLC Wage Search for Software Developers in your metro area before you accept an offer.
Target employers with cap-exempt filing options
Universities, nonprofit research organizations, and government research entities are cap-exempt, meaning they can file your H-1B petition any time without waiting for the April lottery. Python roles in academic computing and research labs qualify.
Filter employers by LCA filing history on Migrate Mate
Search Senior Python Engineer roles on Migrate Mate to see which employers have active Labor Condition Application filings for this occupation code, so you target companies already set up to sponsor rather than those encountering the process for the first time.
Verify your employer registers in the lottery on time
USCIS opens H-1B registration in early March each year. Confirm your employer submits your registration before the window closes. Missing the window means waiting a full year, even if your offer letter and credentials are otherwise ready.
Document distributed work arrangements before I-129 filing
Senior Python Engineers often work across multiple client sites or remote locations. Each worksite requires its own certified LCA before your employer files Form I-129. Gaps in LCA coverage can trigger a Request for Evidence from USCIS.
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Find Senior Python Engineer JobsSenior Python Engineer H-1B Visa: Frequently Asked Questions
Does a Senior Python Engineer role qualify as an H-1B specialty occupation?
Yes. Senior Python Engineer positions qualify under the computer occupations SOC codes that USCIS recognizes as specialty occupations, provided the role genuinely requires at least a bachelor's degree in computer science, software engineering, or a directly related field. Roles framed as general scripting or IT support, rather than software development, can face RFE scrutiny, so your job description and duties should reflect the engineering-level complexity the position actually involves.
Which employers sponsor H-1B visas for Senior Python Engineer jobs?
Technology companies, financial services firms, cloud infrastructure providers, and enterprise software companies are the most consistent H-1B sponsors for Python engineering roles. To find employers who have already filed Labor Condition Applications for this occupation code, search on Migrate Mate, which surfaces companies with verified H-1B filing history so you're targeting employers with an established sponsorship process rather than starting that conversation from scratch.
What happens to my H-1B status if I change employers mid-petition?
If you change employers after your H-1B petition is approved but before your start date, your current approval becomes void and your new employer must file a fresh petition. If you're already working on H-1B status, your new employer can file an H-1B transfer petition and you can start working for them once USCIS receives it, without waiting for approval, under the portability rules in AC21.
Can I work on OPT as a Senior Python Engineer while waiting for H-1B approval?
Yes. If you're on F-1 OPT or STEM OPT and your employer files your H-1B petition before your OPT expires, the cap-gap rule automatically extends your work authorization until October 1, when your H-1B becomes effective. You can continue working in your Senior Python Engineer role throughout that period without interruption, as long as your employer filed before your OPT end date.
Does the location where I work affect my H-1B petition as a Python Engineer?
Yes. Each worksite requires a certified Labor Condition Application tied to that specific location, and the prevailing wage obligation is set based on where you actually perform the work. Remote work across state lines or frequent client-site rotations can create compliance gaps if your employer's LCA coverage doesn't match your actual work locations. Confirm your employer's LCA covers every location before your I-129 is filed.
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