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Freelance Python Api Developer Jobs in California

OpenAI

Software Engineer, API Safety

San Francisco, CA · On-site

$293K - $385K/yr

The right candidate is comfortable balancing tradeoffs across developer experience, latency ... Proficiency in one or more general-purpose backend languages, such as Python, Go, Rust, or ...

AllSTEM Connections

Software Developer - II

Pescadero, CA · On-site

$164K - $185K/yr

Software Developer II (Python API & Enterprise Integration) Role Overview We are seeking an enthusiastic and results-driven Software Developer II to support the development, integration, and ...

Tata Consultancy Service Limited

AI Engineer

Sunnyvale, CA · On-site

$90K - $140K/yr

... developer tooling) • Strong analytical skills, with hands-on experience in using ML models • ... Python, API Integration, Git, CI/CD, Cloud Platforms, SQL / NoSQL, Vector DB, Feature Delivery ...

Volto USA

GRC Engineer at San Jose CA

San Jose, CA · On-site

Seeking a hands-on GRC Engineer with expertise in Python, API development, and modern architectures (microservices, Kubernetes, Docker). Must have experience building secure, scalable systems with ...

ClifyX

Python Developer

Sunnyvale, CA · On-site

$58.75 - $80.75/hr

ClifyX is a company seeking a Python Developer to analyze complex data sets and improve data ... RESTful API's and database links. • Monitor, validate and maintain data pipelines to ensure ...

Extractable

Python Integrations Developer

San Francisco, CA · Remote

$59.25 - $81.50/hr

The Role We're looking for a Python Integrations Developer to own and expand the third-party ... You'll need to be comfortable reading API docs, parsing data formats, and solving the messy real ...

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Freelance Python Api Developer information

What is the difference between Freelance Python Api Developer vs Freelance Web Developer?

AspectFreelance Python Api DeveloperFreelance Web Developer
Required SkillsPython, API development, RESTful servicesHTML, CSS, JavaScript, front-end/back-end frameworks
Work EnvironmentRemote, project-based, client-specificRemote or on-site, diverse projects
Industry UsageTech, SaaS, data integrationMedia, e-commerce, corporate websites
Common Search IntentAPI development, backend servicesWebsite creation, UI/UX design

Freelance Python Api Developers focus on creating and maintaining APIs using Python, often working on backend services and data integration. Freelance Web Developers build and design websites using HTML, CSS, and JavaScript. While both roles are freelance and tech-oriented, their core skills and project types differ significantly, making this comparison useful for clients seeking specific development expertise.

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The most popular types of Python Api Developer jobs in California are:

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For Freelance Python Api Developer jobs in California, the most frequently searched job titles are:

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The top searched job categories for Freelance Python Api Developer jobs in California are:

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Cities in California with the most Freelance Python Api Developer job openings:

Freelance Python Api Developer jobs near you
Infographic showing various Freelance Python Api Developer job openings in California as of September 2026, with employment types broken down into 67% Full Time, and 33% Contract. Highlights an 100% In-person job distribution.

Software Engineer, API Safety

San Francisco, CA • On-site

OpenAI
Scientific Research and Development Services • 201 - 500 employees
Learn more about OpenAIexternal

$293K - $385K/yr

Full-time

Posted 18 days ago

Key responsibilities

  • Design and build dashboards and APIs for safety controls and customer-facing observability.

  • Develop scalable systems that extend trusted safety capabilities to new use cases, customers, and deployment environments.

  • Own projects from technical design and implementation through launch and ongoing iteration.

Job description

About the Team
OpenAI's mission is to ensure that artificial general intelligence (AGI) benefits all of humanity. The API Platform turns frontier research into reliable capabilities that developers use to build transformative products and services for people around the world.
API Safety's goal is to ensure safe deployment of frontier models in the API. We design APIs and systems that help developers share usage context, understand safety events, and apply safeguards tailored to the risk profile of the applications they are building. This work is critical to our frontier model launches and partners closely with teams across API, Integrity, and Safety Research.
About the Role
We're looking for product-minded software engineers to join a team that is addressing emerging risks at the frontier of model development while building novel solutions for real-world AI deployment. The day-to-day work ranges from solving production challenges to designing new product experiences and safeguards. The right candidate is comfortable balancing tradeoffs across developer experience, latency, reliability, and risk.
In this role, you will:
  • Design and build dashboards and APIs for safety controls and customer-facing observability.
  • Develop scalable systems that extend trusted safety capabilities to new use cases, customers, and deployment environments.
  • Partner with Safety Research and Integrity to build safeguards that mitigate emerging risks.
  • Be responsible for the availability, latency, and scalability of safeguards across high-volume API traffic.
  • Own projects from technical design and implementation through launch and ongoing iteration, while raising the team's engineering standards

Your background might look something like:
  • 7+ years of professional experience, excluding internships, in backend, infrastructure, platform, or product engineering roles.
  • A track record of designing, building, and operating production backend services, developer-facing APIs, or distributed systems.
  • Strong software engineering and systems fundamentals, with experience leading technically complex projects from ambiguous ideas to production.
  • Proficiency in one or more general-purpose backend languages, such as Python, Go, Rust, or TypeScript.
  • Experience building reliable, scalable systems and reasoning about distributed architecture, concurrency, latency, observability, and operational tradeoffs.
  • Product judgment and developer empathy, including an ability to turn complex model or infrastructure capabilities into clear, intuitive APIs.
  • Clear communication and a collaborative approach to working with researchers, product managers, designers, infrastructure engineers, and customers.
  • Experience with observability, abuse prevention, trust and safety, identity, security, privacy, compliance, or risk systems is a strong plus.
  • Interest in helping frontier AI reach more developers and businesses responsibly.

About OpenAI
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.
We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.
For additional information, please see OpenAI's Affirmative Action and Equal Employment Opportunity Policy Statement.
Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.
To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance.
We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link.
OpenAI Global Applicant Privacy Policy
At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

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