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100 api developer integration engineer jobs at 78 companies in Simi Valley, CA

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Payload Integration Engineer - Level 4
Pasadena, California, United States
$127k-$193k/yr HybridFull Time
Sophia Space
Sophia Space: Modular data center hardware for in-orbit computing and AI.
8+ YOEBS in engineering, 8+ years spacecraft or payload systems engineering experience, ownership of payload integration/ICDs/I&T, electro-optical payload expertise, API/SDK integration experience, strong cross-disciplinary leadership; U.S. Person required.
SpaceWire, GigE Vision, MIPI CSI, RS-422, CAN, Ethernet, MIL-STD-1553, CCSDS, MBSE, SysML, DOORS, Jama, Polarion, Cameo, Innoslate, MGSE, EGSE, APIs, SDKs
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3w
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Senior Integration Engineer - Tokenization
United States or Los Angeles or Seattle or San Francisco or New York City
$113k-$153k/yr RemoteFull Time
Marqeta
MarqetaNASDAQ: MQ: Providing cloud-based card issuing and payment processing infrastructure.
5+ YOE5+ years advising enterprise customers on technical integrations, strong API knowledge, experience with Postman or Bruno, SQL and Datadog a plus, bachelor’s degree preferred.
Bruno, Postman, SQL, Datadog
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4w
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Integration Engineer
Oxnard, California, United States
$118k-$158k/yr OnsiteFull Time
City of Oxnard
City of Oxnard: Provides municipal services and public administration for Oxnard residents.
5+ YOEBachelor's degree and 5+ years' experience integrating vendor applications and APIs; strong Python/SQL/PHP/JavaScript skills, scripting (PowerShell,Bash), ETL and RDBMS experience, API design, Git, and public-sector security compliance.
Python, SQL, PHP, Javascript, PowerShell, Bash, Apache, SSIS, MSSQL, PostgresQL, Git, React, Vue.js, Microsoft 365, SharePoint, PowerApps, ERP, CRM
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3w
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Integration Engineer - High Voltage Los Angeles, CA
Los Angeles, California, United States
$110k-$145k/yr OnsiteFull Time
Volkswagen Group
Volkswagen GroupFrankfurt Stock Exchange: VOW3: Global manufacturer of motor vehicles and automotive financial service provider.
5+ YOE5+ years validation/integration experience for connected infotainment, VWAG vehicle integration knowledge, engineering degree, strong communication, test and resource management, knowledge of CAN/MOST/Ethernet/FlexRay.
CAN, MOST, Ethernet, FlexRay, APIs, MQTT, Cloud Infrastructure
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Sr HRIS Integration Engineer
Long Beach, California, United States
$131k-$181k/yr OnsiteFull Time
Relativity Space
Relativity Space: Designing and manufacturing 3D-printed rockets and launch vehicles.
5+ YOE5+ years Workday experience with HCM/payroll/time architecture, hands-on cross-system integrations (Workday Studio, APIs), Workday configuration and security expertise, strong communication skills.
Workday, Workday Studio, Core Connectors, EIBs, Greenhouse, System APIs, Reporting Infrastructure
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2w
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Enterprise Architect Integration Engineer II
Los Angeles, California, United States
$105k-$174k/yr OnsiteFull Time
L.A. Care Health Plan
L.A. Care Health Plan: Public health plan providing coverage to Los Angeles residents.
5+ YOE5+ years designing and implementing data applications and integrations; experience with APIs, SOA, messaging, cloud, databases, and healthcare interoperability standards; bachelor\u0002s degree required.
Java, JSP, Oracle PL/SQL, SQL Server, SOAP, REST, Microservices, Informatica IDMC, IICS, Oracle SOA Suite, BPEL, Oracle Service Bus (OSB), JMS, Git, HL7, FHIR, X12 EDI, Kafka, Pub/Sub, AWS API Gateway, NoSQL, Snowflake, Redshift, Databricks, OAuth 2.0, JWT, Swagger, OpenAPI, Jenkins, Azure DevOps, GitHub Actions
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Senior Software Engineer - Integrations
New York City or San Francisco or Los Angeles
$180k-$210k/yr HybridFull Time
Pivotal Health
Pivotal Health: AI platform automating healthcare insurance claim disputes for providers.
5+ YOE5+ years backend software engineering experience; strong system design, data modeling, API development, and integrations experience. Comfortable with messy healthcare data and stakeholder collaboration. Python and healthcare integrations experience preferred.
SFTP, EDI, HL7, FHIR, ICD-10, CPT, Epic, Cerner, Python, APIs
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2mo
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AI Solutions Developer – Insurance Operations & Systems Integration
Los Angeles, California, United States
$100k-$150k/yr OnsiteFull Time
Knight Insurance Group
Knight Insurance Group: Provides specialty property and casualty insurance and underwriting services.
Develop AI-driven software for insurance operations; build internal tools, dashboards, API integrations; experience with AI-assisted development, web apps, SQL, and cloud/SaaS.
Python, JavaScript, Node.js, React, SQL, APIs, Cloud platforms
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3mo
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Backend Engineer - PCB CAD Integration
Los Angeles, California, United States
$150k-$160k/yr RemoteFull Time
Quilter
Quilter: Automates printed circuit board layout using physics-driven AI.
3+ YOE3+ years backend software experience; expert Python; strong API design and distributed systems; leadership and collaboration; startup environment adaptability.
Python, Backend frameworks, AWS, Docker, Kubernetes, Terraform, JSON, XML, protobuf
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1mo
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Senior Platform Engineer, AI
Denver or Long Beach
$170k-$275k/yr HybridFull Time
True Anomaly
True Anomaly: Develops autonomous spacecraft and software for space security missions.
5+ YOE5+ years software/cloud/DevOps experience; production development in Python/TypeScript/Java; experience with LLM APIs, prompt engineering, RAG, agent frameworks, API integrations; ability to obtain Top-Secret clearance and U.S. citizenship or equivalent status.
Python, TypeScript, Java, CrewAI, Pydantic AI, API, webhooks, MCP, Retrieval-Augmented Generation (RAG), AWS, Azure, GCP, AWS GovCloud, Azure Government, FedRAMP, NIST 800-53, IL4, IL5
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2mo
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AI Solutions Developer – Insurance Operations & Systems Integration
Los Angeles, California, United States
$100k-$150k/yr OnsiteFull Time
Hankey Group
Hankey Group: Diversified automotive, financial services, and technology conglomerate.
AI-driven software development, API integrations, web apps, dashboards, and automation for insurance workflows.
Python, JavaScript, Node.js, React, SQL
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3w
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Senior Salesforce Developer
Waltham or Rancho Dominguez or Bridgewater
$130k-$170k/yr OnsiteFull Time
Repligen
RepligenNASDAQ: RGEN: Develops and manufactures bioprocessing technologies for pharmaceutical drug production.
7+ YOEBachelor's in a technical field,7+ years Salesforce development experience,Platform Developer I required; expertise in Apex,LWC,Visualforce,SOQL/SOSL,APIs and integrations; strong security, data modeling, and agile experience.
Salesforce, Sales Cloud, Service Cloud, Experience Cloud, Data Cloud, Salesforce CPQ, Apex, Lightning Web Components (LWC), Visualforce, SOQL, SOSL, APIs, REST, SOAP, KBMax, Xactly, SAP, Einstein, Agentforce, Agile, Scrum
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2mo
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Systems Engineer, Mid
El Segundo, California, United States
$62k-$141k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
5+ YOE5+ years systems engineering for DoD space ground systems, 3+ years mission integration, Python scripting, ICD/API development, MBSE/Digital Engineering, Microsoft Office suite, TS/SCI clearance, bachelor’s in engineering/math/physics/CS.
Python, Microsoft Teams, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Confluence, Jira
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2mo
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Salesforce Developer
Los Angeles or San Francisco
$105k-$115k/yr HybridFull Time
Brilliant Corners
Brilliant Corners: Provides supportive housing and clinical services to vulnerable populations.
3+ YOE3+ years Salesforce development: Apex, LWC, Experience Cloud, API integrations (REST/SOAP), FormAssembly, CI/CD, Git; Platform Developer certification preferred.
Apex, SOQL, SOSL, Visualforce, Lightning Web Components (LWC), Aura Components, REST, SOAP, OAuth 2.0, JWT, Named Credentials, Platform Events, FormAssembly, JavaScript, HTML, CSS, Python, Java, C#, Salesforce DX (SFDX), CLI, change sets, GitHub Actions, Copado, Gearset, Jenkins, ANT, Git, GitHub, Microsoft Word, Microsoft Excel, Microsoft Outlook, PMD, Apex PMD, ESLint, MuleSoft, Workato, Boomi, Zapier, Experience Cloud, Salesforce Connect, Omni-Channel flow
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2mo
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Systems Engineer, Senior
El Segundo, California, United States
$87k-$198k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
8+ YOERequires 8+ years systems engineering for DoD space ground systems, 5+ years integrating missions, TS/SCI clearance, Bachelor's in Engineering/Math/Physics/CS, Python and MBSE experience, ICD/API development, and Microsoft Office proficiency.
Python, Model-Based Systems Engineering (MBSE), Digital Engineering, Microsoft Teams, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Confluence, Jira
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1mo
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Forward Deployed Engineer
New York City or San Francisco or Los Angeles County or California or United States
$162k-$219k/yr HybridFull Time
Hatch
HatchNYSE: YELP: AI-powered customer engagement platform for home service businesses
1+ YOEHands-on engineer building n8n flows, direct API integrations, webhooks, and middleware; client-facing consulting; 1+ years software engineering experience (consulting preferred); strong communication and technical documentation skills.
n8n, API, webhook, CRM
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2mo
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Principal Engineer, Manufacturing Systems
Torrance, California, United States
$100k-$190k/yr OnsiteFull Time
Neros Technologies
Neros Technologies: Designs and manufactures American-made high-performance drones for defense.
8+ YOE8+ years software engineering experience with backend/platform/internal tools work; strong coding, API and integration design, production software delivery, cross-functional collaboration, and onsite factory support.
MES, ERP, QMS, CRM, WMS, APIs, ETL/ELT, CDC, message queues, RBAC, event-driven systems, integration platforms, barcode scanning
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2mo
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Software Engineer, Tech Ops
Santa Monica or Los Angeles or United States
$135k-$167k/yr HybridFull Time
ZipRecruiter
ZipRecruiterNYSE: ZIP: Online employment marketplace connecting job seekers and employers.
2+ YOE2+ years software engineering or systems integration experience; proficiency in TypeScript and/or Python; API and third-party integration experience; experience using AI developer tools (Cursor, Copilot, Claude).
TypeScript, Python, Cursor, Copilot, Claude, NetSuite, Okta, ADP, Google, Salesforce
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Web Developer
Santa Monica, California, United States
OnsiteContract, Full Time
Helios Worldwide
Helios Worldwide: Global agency providing AI-powered marketing and workforce management solutions.
Experience building and customizing Webflow and Shopify sites; strong HTML5, CSS3, JavaScript, API integration, responsive design, Git; e-commerce and debugging skills.
Webflow, Shopify, HTML5, CSS3, JavaScript, APIs, Git, GitHub
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2mo
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AI Tooling Engineer
San Francisco or Seattle or Los Angeles or New York City or United Kingdom or Ireland or Poland or Germany or Australia or North America or Europe
$200k-$260k/yr RemoteFull Time
Whatnot
Whatnot: Social marketplace for buying and selling via live streams
4+ YOE4+ years industry experience, 1+ years applied AI/LLM product experience; strong fluency with prompt engineering, RAG, MCP, agents, evals; systems-integration experience with APIs/webhooks; strong communication and mentorship skills.
Anthropic, OpenAI, Google, APIs, webhooks, LLM, RAG, MCP, evals
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