1,820 api engineer jobs at 740 companies in Mill Valley, CA
3mo
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API Inspector
Benicia, California, United States
$90k-$150k/yr OnsiteFull Time
Experienced API Inspector with active API 510/570/653 certifications; field-based; strong report writing; travel required.
NDT, IDMS, digital inspection tools
1mo
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Principal API Architect, Product Engineering – Agent‑Ready APIs & Data
Pleasanton, California, United States
$206k-$310k/yr HybridFull Time
12+ YOE12+ years building large-scale backend systems and APIs, 5+ years in senior architecture roles, hands-on TypeScript or Python, OpenAPI/Swagger and API governance experience, MCP familiarity, strong communication and mentoring skills.
TypeScript, Python, REST, GraphQL, SOAP, JSON, XML, WSDL, Swagger, OpenAPI, MCP, Cursor, Claude Code, GitHub Copilot, Data Cloud, SQL, Agent Factory, Trident, Gateways
2mo
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Quality Assurance Engineer - Cloud, UI & API
Cupertino, California, United States
$106k-$214k/yr HybridFull Time
5+ YOE5+ years QA/software testing, customer support, or related engineering; Python proficiency; UI/API troubleshooting; Selenium/pytest experience.
Python, Selenium, pytest, Django RESTful API
1mo
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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
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
3w
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Staff Software Engineer, Foundation Model API
San Francisco or Mountain View
$190k-$265k/yr OnsiteFull Time
8+ YOE8+ years backend/infrastructure experience, distributed systems, scalable APIs, cloud-native infra, real-time serving/ML infra/GPU orchestration, strong Scala/Go/Python skills, product ownership and customer engagement.
OpenAI, Anthropic, Gemini, Qwen, GPT-OSS, Llama, SageMaker, Vertex AI, Azure ML, FMAPI, Apache Spark™, Delta Lake, MLflow, Scala, Go, Python
2d
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Software Engineer, API Enterprise Controls
San Francisco, California, United States
$293k-$385k/yr OnsiteFull Time
9+ YOE9+ years of professional engineering experience; exceptional backend depth; API or platform experience; cross-functional leadership; backend language proficiency; distributed systems expertise; strong communication and operational excellence.
Python, Go, Rust, TypeScript
4d
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Staff Software Engineer, Fintech API
Mountain View, California, United States
$203k-$274k/yr OnsiteFull Time
10+ YOE10+ years software engineering experience with deep API design, distributed systems, codegen/CI-CD, AI agent tooling, cross-team technical leadership; Bachelor\u0002s in CS or equivalent experience.
OpenAPI, REST, Model Context Protocol (MCP), Claude, ChatGPT Actions, LLM, CI/CD
1mo
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Operations Engineer - Peptide API
Menlo Park, California, United States
$110k-$125k/yr OnsiteFull Time
2+ YOEBachelor's in chemical/chemistry/biochemistry or related, 2+ years pharma/biotech/chemical manufacturing experience, peptide/API manufacturing or complex chemical process experience preferred, cGMP knowledge, hands-on troubleshooting, documentation and SOP experience.
4w
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Staff Software Engineer, API Platform
San Francisco or Seattle
OnsiteFull Time
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
1w
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Staff Software Engineer, API Platform
Seattle or South San Francisco
$224k-$336k/yr OnsiteFull Time
12+ YOE5+ Mgmt12+ years technical experience,5+ years technical leadership,experience with API design and infrastructure,proficiency in at least one of Java,Ruby,Python,Go,strong communication and problem-solving skills.
Java, Ruby, Python, Go, Kafka, Kubernetes
1mo
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Member of Technical Staff (Software Engineer, API Platform)
San Francisco or New York City
$220k-$405k/yr OnsiteFull Time
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
2w
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Software Engineer, Metal Runtime (API & Abstractions)
Austin or Santa Clara or Toronto
$100k-$500k/yr HybridFull Time
Strong C/C++ low-level systems programming, concurrency and performance experience; API and abstraction design; collaboration with runtime, kernel, compiler teams.
C, C++
2d
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Sr. II Backend Engineer, Mobile API
San Mateo, California, United States
$176k-$220k/yr HybridFull Time
Extensive backend development experience with PHP, RESTful or GraphQL APIs, relational databases, distributed systems, cloud platforms, containers, CI/CD, production monitoring, and cross-team technical leadership.
PHP, Vue, TypeScript, MySQL, PostgreSQL, RabbitMQ, Valkey, Redis, Kafka, Firebase Cloud Messaging, APNs, Docker, Kubernetes, GitHub Actions, JWT, RESTful, GraphQL, iOS, Android, CI/CD
2mo
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Quality Assurance Engineer - Cloud, UI & API
Cupertino, California, United States
$106k-$214k/yr HybridFull Time
5+ YOE5+ years in QA/software testing or related roles; strong Python, UI/API testing; test automation; customer-facing support experience.
Python, Selenium, pytest, Django REST framework
2mo
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Quality Assurance Engineer - Cloud, UI & API
Cupertino, California, United States
$106k-$214k/yr OnsiteFull Time
5+ YOE5+ years QA experience; Python; UI/API testing; test automation; customer interaction; US citizenship; degree in CS or related field.
Python, Selenium, pytest, Django RESTful API
4w
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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
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
1w
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Staff Software Engineer, API Proxy
Sunnyvale, California, United States
$207k-$300k/yr OnsiteFull Time
8+ YOEBachelor's or equivalent experience, 8+ years C++ programming, 5+ years testing/launching software, 5+ years building large-scale distributed systems, EMR not mentioned (ignore), leadership and architecture experience preferred.
C++, gRPC, HTTP, Stubby, Envoy Proxy, Enterprise Security Framework (ESF), One Model Context Protocol (OneMCP), ExtProc
1mo
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Software Engineer, Solutions Engineering
Milpitas, California, United States
$153k-$219k/yr OnsiteFull Time
5+ YOEDegree in engineering or related field with 5–7+ years' experience, hands-on networking (routing/switching/wireless), Python and REST API automation, familiarity with Cisco products and AI-assisted engineering tools, strong communication.
Python, REST API, Codex, GitHub Copilot, Claude, Cisco Catalyst Center, Catalyst 9000, Meraki, Identity Services Engine (ISE), CI/CD, AI Agents, MCP, LLMs
1w
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Solution Engineer
New York City or Boston or Palo Alto
$130k-$165k/yr HybridFull Time
3+ YOE3+ years customer-facing technical/support/consulting experience; experience implementing SaaS in enterprise environments; familiarity with APIs, SQL, Jira, GitHub, CSV/JSON; BS/MS in CS/math/engineering or equivalent.
Graphyte, APIs, SQL, Atlassian Jira, GitHub, CSV, JSON
3w
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Forward Deployed Engineer
San Francisco, California, United States
$160k-$250k/yr OnsiteFull Time
Strong engineering fundamentals, experience with APIs/webhooks/OAuth/SSO/ATS, debugging and integration skills, clear communication, high ownership.
APIs, webhooks, OAuth, SSO, ATS
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