API jobs in California

Sr. Software Engineer / Java / C++ / API / embedded / POS or Payment Processing / Irvine

Irvine, California

•

Today

Our client in the EV/AV space is urgently looking for a Sr. Software engineer with strong experience in Java, API, Integration, Payment processing or POS, and UI and embedded systems to add to their growing team here in Irvine. This position MUST be onsite 5 Days a week in their Irvin Location The Embedded Software engineer is responsible for designing, implementing, testing, and maintaining software for embedded systems. This role requires a deep understanding of both embedded and software to e

Easy Apply

Full-time

USD 11.00 per hour

7213 - Senior Web Application Engineer (JavaScript / API / SQL) ( Must Reside in Sacramento, CA to be considered)

Rancho Cordova, California

•

Today

7213 - Senior Web Application Engineer (JavaScript / API / SQL) ( Must Reside in Sacramento, CA to be considered)Overview Seeking a Senior Full Stack Software Engineer to support the design, development, and ongoing enhancement of enterprise web applications. This role focuses on building modern, scalable solutions that support critical business operations. The ideal candidate brings strong hands-on development experience, thrives in a collaborative environment, and is comfortable working across

Easy Apply

Contract

$50+

AWS API Developer

Remote

•

Today

It''s a remote role, but need to travel to Washington, DC, quarterly once for the PI planning meeting. We are seeking an experienced AWS API Developer to design, develop, and optimize scalable API solutions within a cloud-native environment. The ideal candidate will have strong hands-on expertise in AWS services, modern programming languages, and API-driven architecture to build secure, high-performance applications and services. ResponsibilitiesDesign, develop, and maintain scalable RESTful and

Easy Apply

Contract

Depends on Experience

API Integration Developer

Remote

•

Today

Job Number: R0238401 API Integration Developer The Opportunity: Modern data platforms rely on seamless, secure, and scalable data exchange across systems, applications, and mission users. APIs are the backbone of that connectivity-enabling trusted access to data products, supporting system integration, and enforcing governance across the enterprise. That's why we need you. As a Lead API Developer, you will design and implement the API services that power an e nterprise data platform operating in

Full-time

USD 99,000.00 - 225,000.00 per year

Integration & API Lead (Majesco + Ecosystem) (Remote)

Remote

•

15d ago

Job Role: Integration & API Lead (Majesco + Ecosystem) Location: Canada/USA- Remote Exp. Start date: 1st Week of May Duration: 6+ Months Year of Experience: 8-12 Years Role Summary We are hiring an Integration & API Lead to drive integration architecture and API strategy across Majesco and external systems. Key Responsibilities Design and implement integration solutions between Majesco and external platforms Define API architecture, standards, and governance Lead development of REST/SOA

Easy Apply

Contract, Third Party

$78 - $85

Senior API Migration Engineer (REST APIs - Cloud Migration)

Remote or Almont, Colorado

•

Today

Description: Remote Our client seeks a Senior API Migration Engineer to lead the migration, validation, and optimization of REST APIs from on-prem Exadata to Oracle Database in the cloud. The role focuses on compatibility remediation, authentication alignment, performance tuning, and end-to-end validation using tools such as Postman or Insomnia. The engineer will coordinate with IT teams on migration strategy, testing cycles, and release readiness while maintaining reliability and security sta

Contract

USD 65.00 - 75.00 per hour

API Integration Lead

Remote

•

Today

We are seeking an experienced API Management Lead to design, develop, and govern enterprise integration solutions using the MuleSoft Anypoint Platform. This role will be responsible for leading API strategy and implementation to enable seamless connectivity across critical enterprise systems and AWS-based applications. The ideal candidate will bring deep expertise in integration patterns, API-led connectivity, and a strong understanding of regulated environments such as biotech, pharmaceuticals,

Easy Apply

Contract

$70 - $85

Azure & API Systems Integration Lead

Remote

•

28d ago

Role OverviewThe Azure & API Systems Integration Lead is responsible for designing, implementing, and managing cloud-based integration solutions using Microsoft Azure. This role focuses on building scalable APIs, integrating enterprise systems, and leading technical teams to deliver secure and high-performance solutions across platforms. Responsibilities Design and implement scalable integration solutions using Microsoft Azure services. Develop, publish, and manage APIs through Azure API Managem

Easy Apply

Contract, Third Party

Depends on Experience

Azure API Management (APIM) Lead Developer/Architect

Remote

•

Yesterday

The APIM Lead Developer/Architect will be responsible for designing, developing, securing, and managing APIs using API Management (APIM) platforms to support enterprise integrations across applications, data platforms, and business systems. The role focuses on enabling scalable, secure, and governed API-led integrations aligned with enterprise architecture standards. Key Responsibilities Design, develop, and deploy APIs using Azure API Management (APIM) or equivalent API Gateway platforms Confi

Easy Apply

Contract

BA - API & Integration Platform (SME Ins)

Remote

•

Yesterday

Title: BA - API & Integration Platform (SME Ins) Location: Remote, NJ Type: Contract Role Purpose: We are seeking a highly capable Technical Business Analyst (Contract) to support the design, specification, and delivery of API and integration capabilities across the organisation. This role will work within the API & Connectivity pillar to translate business needs, technical requirements, and integration patterns into clear, actionable artefacts for architecture and engineering teams. The

Easy Apply

Contract, Third Party

$66 - $68

API Platform Engineer with AWS - USA Remote

Remote

•

14d ago

Hello All, We are hiring below job opening API Platform Engineer/DevOps Location: USA Remote Please find the JD for the API Platform Engineer role attached. Please start sourcing candidates who can join immediately. While this is an IoT-driven environment, we can be flexible on IoT experience for strong candidates with relevant API and platform engineering expertise. Key Responsibilities Analyze the client s IoT-downstream API traffic patterns: identify latency-critical paths (lock/unlock, ther

Easy Apply

Contract

$60+

Microsoft Azure API Management Lead

Remote

•

6d ago

Our direct client is looking for Microsoft Azure API Management LeadWorker Location: Remote - United States Remote US Position Summary The Microsoft Azure API Management Lead owns the end-to-end delivery and operations of enterprise APIs on Azure - architecture, development (Python), security, deployment, monitoring, and support. The role also leads migration of legacy integrations to the Azure APIM platform and promotes engineering standards and effective use of GenAI tools across the team. Ke

Easy Apply

Contract

Depends on Experience

.NET Full Stack Engineer (Azure, SQL, API) :: Remote :: W2 Position Only

Remote

•

Yesterday

Key Responsibilities Develop and maintain full-stack web applications using.NET / .NET CoreDesign and implement robust, reusable, and scalableRESTful APIsBuild interactive and responsive user interfaces using modern JavaScript frameworks such asAngular or ReactCreate, manage, and optimizeSQL Server databases, including complex queries and stored proceduresIntegrate applications with internal and external systems using secure API-based communicationDeploy, monitor, and maintain applications inMic

Easy Apply

Contract

Depends on Experience

RTA Posted Job Description

Mountain View, California

•

28d ago

Our client, a Technology, is looking to hire a Software Engineer in Mountain View, CA. Pay Rate Range:$110-115/hr. on W2 (all-inclusive),depending on experience Responsibilities:Experience coding in C++, Java, Kotlin.Relevant experience dealing with large data handling and processing infrastructure.Relevant work experience in server-side app development framework.Requirements:As a Software Engineer, you have influence well beyond yourself. You often own all aspects of your immediate area of so

Easy Apply

Third Party, Contract

$103.64 - $122.21

RPA & Agentic Workflow Engineer

Remote

•

9d ago

Seeking a hands-on RPA & Workflow Engineer to modernize legacy systems by building automated and AI-driven workflows. This role focuses on developing RPA solutions and integrating agent-based workflows using Strands, LangGraph, and Amazon Bedrock. Responsibilities: Develop and maintain RPA workflows and automation pipelinesBuild and support agent-based workflows using Strands and LangGraphDesign and implement RAG pipelines (embeddings, vector stores, retrieval patterns)Develop GenAI-enabled work

Easy Apply

Full-time

Depends on Experience

Kong API Software Developer

Remote

•

14d ago

Key Responsibilities Lead design and development of scalable software solutions and platform services.Provide architectural guidance, code reviews, and technical mentorship.Collaborate with product, engineering, and crossfunctional teams to align on technical strategy.Contribute hands on to backend development, API design, cloud architecture, and integration.Drive engineering best practices, documentation, performance improvements, and platform reliability.Required Skills 10+ years of experience

Easy Apply

Contract

$60 - $70

Integration Developer (Healthcare – HTTP APIs)

Remote

•

6d ago

Job Description:We are seeking an experienced Integration Developer with strong expertise in building and managing HTTP APIs and healthcare data integrations. The ideal candidate should have hands-on experience with healthcare integration engines and standards, enabling seamless data exchange across systems. Key Responsibilities:Design, develop, and maintain RESTful HTTP APIs for system integrationsIntegrate healthcare systems using HL7, FHIR, and other healthcare data standardsWork with integra

Easy Apply

Contract

Depends on Experience

APIGEE Engineer

Remote

•

7d ago

Role: Sr APIGEE Engineer Location: Remote Job Description Responsibilities Multi-Cloud Runtime Management: Design and implement the Apigee Hybrid runtime plane on Azure Kubernetes Service (AKS) and eventually on-premises Kubernetes clusters. Infrastructure as Code (IaC): Lead the automation of platform deployments and upgrades using Terraform, Python, and Helm to ensure consistency between cloud and on-prem environments. Connectivity & Networking: Maintain high-availability connectivity betw

Easy Apply

Full-time

Depends on Experience

Senior Software Engineer API Development

Remote

•

9d ago

Role: Senior Software Engineer API Development Location: New York / Remote Job Description: We are seeking a highly skilled Senior Software Engineer API Development to design, develop, and support secure, scalable REST APIs that power both internal enterprise systems and external client-facing digital solutions. This is a senior-level individual contributor role focused on high-quality delivery, production reliability, and secure API development within a serverless AWS environment. The role rep

Easy Apply

Contract

$70 - $80

Full Stack .NET Developer (Exp ntegrated APIs for payroll systems with external vendors)

Fremont, California

•

2d ago

Job Title: Full Stack .NET Developer Payroll systems Location: Fremont, CA 94538 (onsite) About the Role You ll work alongside experienced engineers across multiple disciplines to deliver high-impact solutions that streamline operations, enhance system reliability, and improve the user experience for internal stakeholders. This role involves developing and maintaining scalable, secure, and maintainable modules within a home-grown payroll application specifically those responsible for transmitti

Easy Apply

Contract, Third Party

Depends on Experience

Filter Results

Job post features

Posted date

Work settings

Employment type

Employer type

Work authorization

API jobs in California, USA