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Senior Backend Python Jobs in California (NOW HIRING)

Hedra

Senior Backend Engineer

San Francisco, CA · On-site

$175K - $275K/yr

As a Senior Backend Engineer , you will design, build, and deploy the backend services that power ... Experience developing scalable services using Python, using frameworks such as FastAPI and Pydantic

Phonely Ltd

Senior Backend Engineer

San Francisco, CA · On-site

$200K - $350K/yr

Senior Backend Engineer (Python) At some point in the future, every business will answer their phone with voice AI. We are making sure that when they build that AI agent, the experience of doing so ...

Addison Group

Sr. Backend Engineer

San Ramon, CA

$65 - $75/hr

Title : Sr. Backend Engineer Location : San Ramon, CA Pay : $65-75/hr Job Type : 6 Month Contract ... React, TypeScript · Backend: o Python (API platform, AWS Lambda, dynamic DBs) o Node.js, ...

Addison Group

Sr. Backend Engineer

San Ramon, CA · On-site

$65 - $75/hr

Title : Sr. Backend Engineer Location : San Ramon, CA Pay : $65-75/hr Job Type : 6 Month Contract ... React, TypeScript · Backend: o Python (API platform, AWS Lambda, dynamic DBs) o Node.js, ...

Addison Group

Sr. Backend Engineer

San Ramon, CA · On-site

$65 - $75/hr

Title : Sr. Backend Engineer Location : San Ramon, CA Pay : $65-75/hr Job Type : 6 Month Contract ... React, TypeScript · Backend: o Python (API platform, AWS Lambda, dynamic DBs) o Node.js, ...

Addison Group

Sr. Backend Engineer

San Ramon, CA · On-site

$65 - $75/hr

Title : Sr. Backend Engineer Location : San Ramon, CA Pay : $65-75/hr Job Type : 6 Month Contract ... React, TypeScript • Backend: o Python (API platform, AWS Lambda, dynamic DBs) o Node.js, ...

FlexAI

Senior Backend Engineer

San Jose, CA · On-site

$180K - $225K/yr

As a Senior Backend Engineer , you'll drive backend architecture, scale platform services, and ... Golang (Primary), Python (Secondary) * Infrastructure: Kubernetes, Docker, Cloud (AWS/GCP/Azure)

Finvest

Senior Backend Engineer

San Francisco, CA · On-site

We are looking for a senior engineer to join our team in San Francisco. As one of the founding ... Fluent in Node/Typescript, Python, Postgres, and AWS * Proven ability to architect complex ...

Replo

Senior Backend Engineer

San Francisco, CA · On-site

$200K - $500K/yr

About the role Hiring a senior backend engineer to join our team and focus on system architecture ... If you have experience writing these systems in Python/Go/Java that's cool too, as long as you're ...

Scribe

Senior Backend Engineer

San Francisco, CA · On-site

$170K - $230K/yr

One team one dream About this role We're looking for a Senior Backend Engineer to join our Core ... Python + Django * PostgreSQL * Redis * Celery + AmazonMQ * Infrastructure in Terraform (AWS ...

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Senior Backend Python information

What are the key skills and qualifications needed to thrive as a Senior Backend Python Developer, and why are they important?

To thrive as a Senior Backend Python Developer, you need expertise in Python programming, strong knowledge of backend frameworks (such as Django or Flask), and experience with database management, often backed by a degree in computer science or equivalent experience. Familiarity with version control systems like Git, containerization tools like Docker, cloud platforms (e.g., AWS), and possibly certifications in cloud or Python technologies are common requirements. Outstanding problem-solving skills, effective communication, and the ability to mentor junior developers help set top performers apart. These competencies ensure the development of robust, scalable, and maintainable backend systems that support business objectives.

What is the difference between Senior Backend Python vs Backend Developer?

AspectSenior Backend PythonBackend Developer
Required CredentialsBachelor's in CS or related, 5+ years experience, Python expertiseBachelor's in CS or related, 2-4 years experience, Python knowledge
Work EnvironmentTech companies, startups, enterprise systemsTech firms, startups, software agencies
Employer & Industry UsageUsed across industries requiring scalable backend solutionsCommon in web development and software services
Search & Comparison IntentUnderstanding senior roles, responsibilities, salaryEntry to mid-level backend roles, skill requirements

Senior Backend Python professionals typically have more experience, advanced skills, and leadership responsibilities compared to Backend Developers. They often work on complex systems, mentor junior staff, and have a broader understanding of architecture. Backend Developers focus on building and maintaining backend services with less emphasis on leadership or strategic planning.

What are some common challenges Senior Backend Python developers face when working on large-scale systems?

Senior Backend Python developers working on large-scale systems often encounter challenges such as ensuring application scalability, maintaining code quality across distributed teams, and optimizing performance for high traffic. Balancing the integration of new features with legacy system constraints can also be demanding. Effective communication and collaboration with frontend teams, DevOps, and product managers are crucial for delivering reliable and maintainable backend solutions.

What does a Senior Backend Python Developer do?

A Senior Backend Python Developer designs, builds, and maintains the server-side logic of web applications using Python. They are responsible for creating robust APIs, optimizing databases, ensuring application security, and integrating third-party services. In addition, they often mentor junior developers, contribute to architectural decisions, and collaborate closely with frontend and DevOps teams. Their work ensures that applications are scalable, reliable, and efficient. Senior developers typically have several years of experience and deep knowledge of Python frameworks like Django or Flask.
What are the most commonly searched types of Backend Python jobs in California? The most popular types of Backend Python jobs in California are:
What are popular job titles related to Senior Backend Python jobs in California? For Senior Backend Python jobs in California, the most frequently searched job titles are:
What job categories do people searching Senior Backend Python jobs in California look for? The top searched job categories for Senior Backend Python jobs in California are:
What cities in California are hiring for Senior Backend Python jobs? Cities in California with the most Senior Backend Python job openings:
Senior Backend Python jobs near you

Senior Backend Engineer

LiteLLM AI Gateway

San Francisco, CA • On-site

$200K - $260K/yr

Full-time

Medical, Dental, Vision

Re-posted 3 days ago

Job description

Senior Backend Engineer
LiteLLM is the world's most popular AI Gateway, trusted by top companies like Adobe, Netflix, and NASA. Our platform empowers developers by providing secure, reliable access to LLMs and adjacent services, and we're looking for a Senior Backend Engineer to help us build rock-solid guardrails and observability tooling at scale.
About The Role
You'll focus on owning our guardrails and logging world-class. You will be in charge of the backend code that ensures all guardrail calls are consistently logged, errors are surfaced to users (not silently swallowed), and our observability instrumentation works for real-world, high-volume traffic. Your attention to detail in areas like latency metrics, logging traceability, and backend guardrail registration will directly impact user trust in our security and compliance features.
Responsibilities
  • Build and scale our product, ensuring performance, reliability, and continuous improvement.
  • Ensure all guardrail and policy enforcement calls (e.g., applyguardrail) are properly logged and traceable through our SpendLogs and relevant database tables
  • Build and design CPU-level guardrails to cover common attacks on LLM API's / MCP servers / Agents
  • Identify and fix areas where silent failures occur in guardrail creation, registration, and policy application-ensuring robust error handling and transparency to end users
  • Work with observability integrations, including Datadog, Splunk, Prometheus, and OpenTelemetry, to maintain accurate, configurable, and usable monitoring and logging for backend systems
  • Enhance observability integrations to work for 1B+ requests/mo., with minimal latency overhead and no memory leaks (e.g. due to cardinality of Prometheus metrics)
  • Collaborate cross-functionally on backend engineering priorities (performance, reliability, security)

What We're Looking For
  • Bachelor's or Master's in Computer Science or related field
  • 1+ years of experience with Python and backend frameworks (e.g. FastAPI, Flask)
  • Understanding of logging best practices, error handling, and secure backend development
  • Exposure to monitoring, logging, or metrics platforms (Datadog, Splunk, Prometheus, OpenTelemetry)
  • Familiarity with database integration and troubleshooting (PostgreSQL, Redis, etc.)
  • Driven to deliver high-quality backend code with strong guardrails, auditing, and debugging capabilities
  • Eagerness to tackle hard bugs and ensure system transparency for end users

Why Join LiteLLM?
  • High-impact, mission-critical work on the core of compliance and reliability
  • Contribute directly to features used by enterprise customers at global scale
  • Fast-paced growth environment with room for technical ownership
  • Competitive salary, health, dental, and vision benefits

About LiteLLM
LiteLLM (https://github.com/BerriAI/litellm) is a Python SDK and Proxy Server enabling seamless calls to 100+ LLM APIs in the OpenAI format, trusted by industry leaders worldwide.
Ready to shape the future of secure, observable AI infrastructure? Apply now!

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