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1,227 api developer jobs at 596 companies in Fairfield, CA

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
1w
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MuleSoft API Developer
San Francisco, California, United States
$61k-$104k/yr HybridFull Time
Capgemini
CapgeminiEuronext Paris: CAP: Provides global IT consulting and digital transformation services.
3+ YOE3+ years as a MuleSoft API Developer; strong MuleSoft Anypoint Platform and Mule ESB experience; REST/JSON API design; integration with Salesforce; API design, deployment, testing; MuleSoft certification preferred.
MuleSoft Anypoint Platform, Mule ESB, MuleSoft Anypoint Studio, Salesforce
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3mo
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Senior API Integration Engineer
Sunnyvale or San Francisco
$165k-$200k/yr OnsiteFull Time
Crusoe
Crusoe: Provides energy-efficient cloud infrastructure powered by stranded and renewable energy.
7+ YOE7+ years in API development or integration engineering; 3+ years with Workato (preferably Workato ONE); extensive experience with REST, OAuth 2.0, SAML, JSON/XML, iPaaS; ERP/CRM integrations; GDPR/SOC 2 compliance; Jira/CI‑CD workflows; HR data models familiarity.
Workato, REST, OAuth 2.0, SAML, JSON, XML, Jira, Confluence, CI/CD
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2w
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Software Engineer, Developer API
New York City or San Francisco or United States or Canada or United Kingdom
$168k-$330k/yr HybridFull Time
Ramp
Ramp: Financial operations platform for corporate cards and spend management.
5+ YOE5+ years backend engineering, experience building APIs/platforms, hands-on with Python, Temporal, and Postgres, familiarity with AI coding agents, strong ownership and developer-experience focus.
Python, Temporal, Postgres
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6d
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Staff Software Engineer, API Platform
San Francisco or Seattle
OnsiteFull Time
Stripe
Stripe: Provides online payment processing and financial infrastructure for businesses.
12+ YOE5+ Mgmt12+ years technical experience,5+ years strategic technical leadership,experience with API design and infrastructure,proficient in Java/Ruby/Python/Go,strong communication and problem-solving skills.
Java, Ruby, Python, Go, Kafka, Kubernetes
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1d
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Senior Software Engineer, Foundation Model API
San Francisco, California, United States
$160k-$225k/yr OnsiteFull Time
Databricks
Databricks: A unified platform for data analytics and artificial intelligence.
8+ YOE8+ years backend or infrastructure engineering; distributed systems, scalable APIs, cloud-native experience; real-time serving or ML infrastructure; strong Scala, Go, or Python skills.
Scala, Go, Python, OpenAI, Anthropic, Gemini, Qwen, GPT-OSS, Llama, SageMaker, Vertex AI, Azure ML, Apache Spark, Delta Lake, MLflow
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1mo
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Software Engineer, API SDK
San Francisco or Seattle or New York City
$293k-$385k/yr HybridFull Time
OpenAI
OpenAI: Develops artificial intelligence models and generative AI software services.
7+ YOE7+ years of professional engineering experience; experience building SDKs; design and implement SDKs for multiple languages; collaborate across teams.
Python, Node.js, Golang, Java, Ruby, SDK generation
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2w
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Senior Software Engineer, Integrations (API Sources & Automation) - Hiring Sprint
San Francisco, California, United States
$196k-$255k/yr HybridFull Time
Airbyte
Airbyte: Open-source data integration platform for automated data movement.
5+ YOE5+ years building backend systems and developer tooling in Python; experience designing APIs/frameworks and leveraging AI/LLM APIs; strong systems thinking, automation, mentoring, and ability to drive ambiguous initiatives.
Python, Java, Airbyte CDKs, Connector Builder, MCP, SDKs, CLI, LLM APIs
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1mo
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Member of Technical Staff (Software Engineer, API Platform)
San Francisco or New York City
$220k-$405k/yr OnsiteFull Time
Perplexity
Perplexity: AI-powered search engine providing conversational answers with citations.
5+ YOE5+ years backend engineering with Python, Go, or Rust; strong high-traffic API design, AWS and Kubernetes experience, CI/CD and DevOps fluency; experience with AI APIs a plus.
Python, Go, Rust, AWS, Kubernetes, CI/CD
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6d
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Senior Software Engineer - API Platform & Client Tooling
Bellevue or Livingston or New York City or San Francisco or Sunnyvale
$153k-$204k/yr OnsiteFull Time
CoreWeave
CoreWeaveNASDAQ: CRWV: Cloud platform providing GPU-accelerated infrastructure for AI workloads.
Production Go experience, API design and versioning, client tooling/SDK/CLI or provider work, code-generation or compiler/tooling experience preferred, cross-team collaboration and mentorship.
Go, gRPC, protocol buffers, Buf, ConnectRPC, Terraform Plugin Framework, Cobra, CWIC
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2w
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API Platform and Ecosystem Development Manager
Montreal or San Francisco or Toronto
HybridFull Time
MaintainX
MaintainX: Provides mobile-first software for maintenance and asset management.
4+ YOE4+ years managing software development teams building APIs and integrations; strong foundation in distributed systems, API design (REST/GraphQL), data modeling, CI/CD, and developer/platform experience.
REST, GraphQL, CI/CD, SDKs, ERP, iPaaS, BI
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1mo
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Sr Software Development Engineer, Product Engineering – API Platform & Agentic AI
Pleasanton, California, United States
$176k-$264k/yr HybridFull Time
Workday
WorkdayNASDAQ: WDAY: Provides cloud-based software for financial and human capital management.
8+ YOE8+ years software engineering experience; 5+ years with TypeScript or Python; Bachelor's in CS/Engineering or equivalent; strong algorithms, API design (REST/GraphQL/SOAP/OpenAPI), testing, observability, and mentoring skills.
TypeScript, Python, OpenAPI, Swagger, REST, SOAP, GraphQL, JUnit, ScalaTest, Postman, Mockito, JaCoCo, Scoverage, Git, Cursor, Claude Code, GitHub Copilot, MCP
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1mo
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Software Engineer, AI
San Francisco, California, United States
$170k/yr HybridFull Time
Convex
Convex: Reactive backend platform for building full-stack web applications.
Experience building developer-facing tools and APIs; TypeScript preferred; strong API/product/infrastructure focus; able to work in SF or remotely; startup experience a plus.
TypeScript, APIs, AI frameworks, DevTools
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2mo
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Developer Partnerships
San Francisco or Palo Alto
OnsiteFull Time
Parallel
Parallel: Build web infrastructure and search APIs for AI agents.
Build and manage developer partnerships, open source BD, and platform integrations; navigate GitHub PRs and API docs; conduct 30+ concurrent partner conversations; prioritize ruthlessly based on distribution potential.
GitHub, API Documentation, Open Source Platforms
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2mo
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Staff Software Engineer
San Francisco, California, United States
OnsiteFull Time
Workato
Workato: Enterprise platform for automating business workflows and integrating applications.
8+ YOE8+ years software development; product-minded; experience building developer-facing products/APIs/SDKs; proficient in Go, Python, Ruby, or JavaScript; hands-on with LLMs; ML production experience a plus; strong API design and developer tooling.
Go, Python, Ruby, JavaScript, LLMs, APIs, SDKs, CLIs
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3mo
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Software Engineer, MyPay
San Francisco, California, United States
$133k-$184k/yr HybridFull Time
Chime
ChimeNasdaq: CHYM: Provides mobile banking and financial tools for everyday consumers.
3+ YOE3+ years software development in production, API design, databases and caching, and large-scale web apps.
APIs, Transactional databases, Caching systems, REST, PostgreSQL, Redis, Kafka
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1w
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Developer Support Engineer
San Francisco, California, United States
$157k-$205k/yr HybridFull Time
Braintrust: Platform for evaluating and monitoring AI model performance.
1+ YOE1+ year supporting developer-facing products, ability to read/debug Python or TypeScript, API/SDK troubleshooting, on-call participation, strong communication and problem-solving skills.
Python, TypeScript, Slack, OpenAI, Anthropic, Terraform, Kubernetes
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3w
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Software Engineer, Enterprise Item
Illinois or United States or Canada or Chicago or Los Angeles or San Francisco
RemoteFull Time
Crate and Barrel
Crate and Barrel: Retails furniture, kitchenware, and home decor products.
2+ YOE2+ years software development experience; designing and supporting APIs, microservices, and integrations. Proficiency with C#/.NET, REST APIs, SQL/NoSQL, cloud platforms, CI/CD, Agile; strong problem-solving and communication.
APIs, microservices, C#, .NET, REST APIs, AWS, Azure, GCP, SQL, NoSQL, CI/CD, Product Information Management (PIM)
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2w
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Software Engineer
Oakland or United States
$149k-$155k/yr RemoteFull Time
Dutch
Dutch: Providing virtual veterinary consultations and prescription services for pets.
2+ YOEBachelor's in STEM, 2 years full-stack software development experience with JavaScript/TypeScript, React, React Native, GraphQL, Git/GitHub, HTML/CSS/Sass, and API integration.
GitHub, Git, JavaScript, TypeScript, HTML, CSS, Sass, React, React Native, GraphQL, APIs
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1mo
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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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1mo
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Temporary Financial Application Developer
California or New York City or Boston or San Francisco or Washington, D.C. or Seattle or Santa Monica
$115k-$173k/yr HybridFull Time, Temporary
Fenwick & West
Fenwick & West: Legal services for technology and life sciences companies.
5+ YOE5+ years supporting and developing financial applications, experience with application development (UI, middle tier, stored procedures), SQL, Microsoft Windows support, APIs, automation and AI/ML familiarity; Bachelor's in CS/IS or equivalent experience.
Microsoft Windows, SQL, APIs, AI services, AI/ML frameworks
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