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Senior Api Developer Jobs in California (NOW HIRING)

Crusoe

Senior API Integration Engineer

Sunnyvale, CA · On-site

About This Role We're seeking a Senior API Integration Engineer to serve as a strategic technical ... Workato Foundations or Integration Developer certifications * Experience with leading enterprise ...

Crusoe

Senior API Integration Engineer

Sunnyvale, CA · On-site

About This Role We're seeking a Senior API Integration Engineer to serve as a strategic technical ... Workato Foundations or Integration Developer certifications * Experience with leading enterprise ...

Apple

API Review & Design Engineer

Cupertino, CA · On-site

... developer experience is just as carefully crafted as Apple's end-user hardware and software ... senior leaders Proven ability to ramp up quickly on new technologies Preferred Qualifications ...

Apple

API Review & Design Engineer

Cupertino, CA

$175K - $308K/yr

... developer experience is just as carefully crafted as Apple's end-user hardware and software ... with engineers and senior leaders Proven ability to ramp up quickly on new technologies Pay ...

Apple

API Review & Design Engineer

Cupertino, CA

$184K - $324K/yr

... developer experience is just as carefully crafted as Apple's end-user hardware and software ... with engineers and senior leaders Proven ability to ramp up quickly on new technologies Pay ...

Jobsbridge

Senior Java REST API Developer

Palo Alto, CA

$67.25 - $85.75/hr

- Extensive programming experience - Experience with REST API development and consumption - Application development using Object Oriented Analysis and Design - Strong unit test and debugging skills ...

Jobsbridge

Senior Java REST API Developer

Palo Alto, CA

$67.25 - $85.75/hr

Company Description Intelliswift Software, Inc - Extensive programming experience - Experience with REST API development and consumption - Application development using Object Oriented Analysis and ...

Jobsbridge

Senior Java REST API Developer

Palo Alto, CA

$67.25 - $85.75/hr

- Extensive programming experience - Experience with REST API development and consumption - Application development using Object Oriented Analysis and Design - Strong unit test and debugging skills ...

Galent

Sr. IBM Data Power & APIC Developer

Torrance, CA · On-site

: * Design develops and support enterprise API and integration solutions utilizing IBM API Connect APIC ... Develop and maintain API products catalogs developer portals rate limiting policies and governance ...

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Senior Api Developer information

See California salary details

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How much do senior api developer jobs pay per hour?

As of Sep 1, 2026, the average hourly pay for senior api developer in California is $60.92, according to ZipRecruiter salary data. Most workers in this role earn between $51.73 and $68.32 per hour, depending on experience, location, and employer.

What is a senior API developer?

Senior API Developers are experienced software engineers who specialize in designing, building, and maintaining Application Programming Interfaces (APIs) that allow different software systems to communicate. They often lead technical projects, mentor junior developers, and ensure APIs are secure, scalable, and well-documented. Senior API Developers typically work with a variety of programming languages and frameworks, and collaborate closely with other teams to align API solutions with business goals.

What skills and qualifications are needed to thrive as a senior API developer?

To thrive as a Senior API Developer, you need advanced programming skills (often in languages such as Java, Python, or Node.js), deep understanding of API design principles, and experience with RESTful and/or GraphQL APIs, typically supported by a relevant degree or professional experience. Familiarity with API management tools (like Postman, Swagger, or Apigee), cloud platforms (such as AWS or Azure), and knowledge of authentication protocols (OAuth, JWT) are vital. Strong problem-solving abilities, effective communication, and leadership skills help in collaborating across teams and mentoring junior developers. These competencies ensure robust, scalable API solutions that meet business needs and integrate seamlessly with other systems.

How do senior API developers typically collaborate with product managers and frontend teams during the development process?

Senior API Developers play a key role in bridging backend systems with product and frontend teams. They work closely with product managers to interpret business requirements into technical specifications for APIs. Regular collaboration with frontend developers ensures that APIs are designed for usability, performance, and scalability, often involving code reviews, feedback sessions, and iterative testing. Effective communication and proactive problem-solving are essential to align API functionality with both business objectives and user experience.

What is the difference between Senior Api Developer vs API Engineer?

AspectSenior API DeveloperAPI Engineer
Required CredentialsBachelor's in CS or related, experience in API developmentBachelor's or higher in CS, software engineering, or related field
Work EnvironmentSoftware development teams, tech companies, startupsDevelopment teams, cloud services, enterprise environments
Employer & Industry UsageTech firms, SaaS providers, e-commerceCloud providers, enterprise software, API platforms
Common Search & ComparisonOften compared for API design and development rolesFocuses on API infrastructure and deployment

While both roles involve working with APIs, a Senior API Developer primarily designs, develops, and maintains APIs, focusing on functionality and integration. An API Engineer often emphasizes the infrastructure, deployment, and scalability of APIs within larger systems. Understanding these distinctions helps employers and professionals choose the right role for their needs.

Are senior API developers in demand?

Senior API developers are in high demand due to the increasing reliance on web services and integrations across industries. They are often required to have expertise in REST, SOAP, and API security, with many organizations seeking experienced professionals to build and maintain scalable, secure APIs. The demand is expected to grow as digital transformation accelerates and companies prioritize cloud-based solutions.

How much do senior API developers make?

Senior API developers typically earn between $100,000 and $150,000 annually, depending on experience, location, and industry. They often have expertise in RESTful APIs, programming languages like Java or Python, and may hold certifications that enhance their earning potential.

What are the most commonly searched types of Api Developer jobs in California?

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

What are popular job titles related to Senior Api Developer jobs in California?

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

What job categories do people searching Senior Api Developer jobs in California look for?

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

What cities in California are hiring for Senior Api Developer jobs?

Cities in California with the most Senior Api Developer job openings:

Senior Api Developer jobs near you
Infographic showing various Senior Api Developer job openings in California as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $126,718 per year, or $60.9 per hour.

Senior API Integration Engineer

Crusoe

Sunnyvale, CA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 18 days ago

Job description

Crusoe is on a mission to accelerate the abundance of energy and intelligence. As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack - from electrons to tokens - to power the world's most ambitious AI workloads. When you join Crusoe, you join a team that is building the future, faster.
We're in the midst of the greatest industrial revolution of our time. The demand for AI compute is boundless, and power is a bottleneck. We're solving that - with an energy-first approach that makes AI infrastructure better for the world and faster for the people innovating with AI.
We're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved - people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services.
If you want to do the most meaningful work of your career, help our customers and partners advance their AI strategies, and be part of a high-performing team that believes in each other, come build with us at Crusoe.
About This Role
We're seeking a Senior API Integration Engineer to serve as a strategic technical partner driving enterprise-wide digital transformation through intelligent automation and scalable system integrations. This role will lead the design and delivery of mission-critical integrations across our People Tech ecosystem while setting integration standards, mentoring engineers, and partnering closely with business leaders to modernize workflows at scale.
What You'll Be Working On
  • Architecting and building enterprise-grade integrations using the Workato ONE platform to enable intelligent workflow automation
  • Designing, developing, and maintaining deep API integrations across a broad enterprise application stack spanning business-critical systems(ERP, CRM, etc.)
  • Leveraging AI-powered automation within Workato to improve efficiency, resiliency, and predictive process optimization
  • Establishing reusable integration architecture patterns, frameworks, and governance standards that scale across both human-led and automated workflows
  • Partnering with business and IT stakeholders to gather requirements, lead discovery sessions, assess ROI, and translate complex needs into scalable technical solutions
  • Leading integration initiatives end-to-end, from concept through deployment, including sprint execution, technical reviews, and delivery accountability
  • Providing senior-level escalation support, ensuring reliability, monitoring, alerting, and incident response for critical integrations

What You'll Bring to the Team
  • 7+ years of experience as an API Developer or Integration Engineer in enterprise environments
  • 3+ years of hands-on production experience with Workato, ideally with Workato ONE
  • Deep expertise building and operating complex Workato recipes, including error handling, monitoring, batch processing, custom connectors, SDK development, and API collections
  • Interest in and exposure to AI-assisted development workflows and intelligent automation - you don't need to be an expert, but you should be excited about where integration engineering is heading
  • Collaborating with internal software engineering teams to ensure integration patterns and API access are available for custom-built internal tools and automations
  • Proven experience integrating enterprise SaaS platforms across domains such as HCM, ERP, CRM, finance, or similar
  • Expert knowledge of enterprise integration best practices, EAI/SOA patterns, and iPaaS architectures
  • Proficiency with RESTful APIs, webhooks, JSON/XML, OAuth 2.0, SAML, SOAP, RBAC, and API security best practices
  • Experience with Agile/Scrum delivery, Jira/JSM, Confluence, and CI/CD workflows
  • Strong understanding of HR data models, compliance requirements (e.g., GDPR, SOC 2), and secure handling of sensitive PII

Bonus Points
  • Workato Foundations or Integration Developer certifications
  • Experience with leading enterprise SaaS platforms and their native integration tooling
  • Experience with additional iPaaS platforms (e.g., MuleSoft, Boomi, Informatica)
  • Background in HR technology consulting or HRIS implementations
  • General experience with cloud platforms (AWS, Azure, or GCP), IaC tools, or identity and SSO integrations
  • Experience in high-growth or highly regulated environments

Benefits:
  • Competitive compensation and equity packages
  • Restricted Stock Units
  • Paid time off, paid holidays & leave of absence programs
  • Comprehensive health, dental & vision insurance
  • Employer contributions to HSA account
  • Paid parental leave
  • Paid life insurance, short-term and long-term disability
  • Professional development & tuition reimbursement
  • Mental health & wellness support
  • Commuter benefits (parking & transit)
  • Cell phone stipend
  • 401(k) Retirement plan with company match up to 4% of salary
  • Volunteer time off
  • Global travel insurance & emergency assistance
  • Daily meals allowance
  • Additional perks & programs specific to location

Compensation Range
Compensation will be paid in the range of up to $165,000 - $200,000 + Bonus. Restricted Stock Units are included in all offers. Compensation to be determined by the applicants knowledge, education, and abilities, as well as internal equity and alignment with market data.
Crusoe is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, disability, genetic information, pregnancy, citizenship, marital status, sex/gender, sexual preference/ orientation, gender identity, age, veteran status, national origin, or any other status protected by law or regulation.

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