Senior Backend Developer Python Jobs in Lake Forest, CA

Here at Siemens, we take pride in enabling sustainable progress through technology. We do this through empowering customers by combining the real and digital worlds. Improving how we live, work, and move today and for the next generation! We know that the only way a business thrives is if our people are thriving. That’s why we always put our people first. Our global, diverse team would be happy to support you and challenge you to grow in new ways. Who knows where our shared journey will take you?

We are developing AI-native products that bring generative intelligence into the physical world. As a Software Engineer, you will set the technical direction for systems that blend cloud infrastructure, machine learning, and hardware interaction. You will be responsible for defining architecture that is robust, scalable, and adaptable to rapid research and product iteration.

This is a high-impact role for a technical leader who thrives on deep systems work and cross-disciplinary problem solving. You will work closely with engineers, ML researchers, product managers, and executives to define the architecture and foundational components that will support the next generation of intelligent, interactive systems. Your decisions will influence the trajectory of multiple engineering teams and the product itself.

• Lead architecture and development of complex, high-scale systems
• Drive technical decisions and trade-offs across multiple domains (infra, ML, product)
• Collaborate across teams to align long-term platform and product direction
• Set engineering standards for code quality, design, and operational excellence
• Mentor and support growth of engineers across the team

• Lead architecture and development of complex, high-scale systems
• Drive technical decisions and trade-offs across multiple domains (infra, ML, product)
• Collaborate across teams to align long-term platform and product direction
• Set engineering standards for code quality, design, and operational excellence
• Mentor and support growth of engineers across the team

• Languages: Python, Go, TypeScript
• ML: PyTorch, HuggingFace, ONNX Runtime, LangChain
• Infrastructure: AWS, Kubernetes, Redis, Postgres, S3, Terraform
• DevOps & Observability: GitHub Actions, Datadog, Grafana, Prometheus

Basic Qualifications

• 6+ years of professional software development experience
• Experience designing and scaling distributed systems in production environments
• Proficiency in at least one backend programming language (e.g., Python, Go, Java)
• Strong understanding of systems architecture, observability, and deployment best practices
• Demonstrated ability to lead cross-functional technical initiatives

• 6+ years of professional software development experience
• Experience designing and scaling distributed systems in production environments
• Proficiency in at least one backend programming language (e.g., Python, Go, Java)
• Strong understanding of systems architecture, observability, and deployment best practices
• Demonstrated ability to lead cross-functional technical initiatives

• Experience with ML model serving or AI product integration
• Prior ownership of mission-critical systems with high availability requirements
• Background in performance engineering or systems optimization
• Experience mentoring senior engineers or leading architectural reviews

We are an early-stage engineering team solving hard technical problems at the intersection of AI, systems, and real-world interaction. We operate with high autonomy, collaborate closely across functions, and maintain high technical standards. Software Engineers at our company are expected to lead by example, model engineering excellence, and shape both what we build and how we build it.

We value your unique identity and perspective. We are fully committed to providing equitable opportunities and building a workplace that reflects the diversity of society, while ensuring that we attract the best talent based on qualifications, skills, and experiences. We welcome you to bring your authentic self and transform the everyday with us.

Siemens offers a variety of health and wellness benefits to our employees. Details regarding our benefits can be found here: https://www.benefitsquickstart.com/siemens/index.html
The pay range for this position is $137,731 - $236,110 annually with a target incentive of 10% of the base salary. The actual wage offered may be lower or higher depending on budget and candidate experience, knowledge, skills, qualifications, and premium geographic location.

Siemens is an Equal Opportunity Employer encouraging inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, gender expression, gender identity, transgender, sex stereotyping, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, and other categories protected by federal, state or local law.

Applicants and employees are protected from discrimination on the basis of race, color, religion, sex, national origin, or any characteristic protected by Federal or other applicable law.

If you require a reasonable accommodation in completing a job application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please fill out the accommodations form by clicking on this linkAccommodationfor disability form . If you’re unable to complete the form, you can reach out to our AskHR team for support at 1-866-743-6367. Please note our AskHR representatives do not have visibility of application or interview status.

California residents have the right to receive additional notices about theirpersonal information. To learn more, clickhere .

Siemens is an Equal Opportunity Employer encouraging inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, gender expression, gender identity, transgender, sex stereotyping, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, and other categories protected by federal, state or local law.

Applicants and employees are protected from discrimination on the basis of race, color, religion, sex, national origin, or any characteristic protected by Federal or other applicable law.

If you require a reasonable accommodation in completing a job application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please fill out the accommodations form by clicking on this linkAccommodationfor disability form . If you’re unable to complete the form, you can reach out to our AskHR team for support at 1-866-743-6367. Please note our AskHR representatives do not have visibility of application or interview status.

Siemens follows Pay Transparency laws.

California residents have the right to receive additional notices about theirpersonal information. To learn more, clickhere .

Qualified applications with arrest or conviction records will be considered foremployment in accordance with applicable local and state laws.

Santa Clara , California , United States of America

Santa Clara , California , United States of America

Costa Mesa , California , United States of America