1,711 sr api developer jobs at 787 companies in California
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
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
1w
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Python API Engineer
Fort Mill or Charlotte or New York City or San Diego or Austin
$106k-$177k/yr OnsiteFull Time
7+ YOE7+ years software engineering experience with Python, REST APIs, AWS (Lambda, API Gateway, CloudWatch, IAM, S3), Terraform, CI/CD (Jenkins/GitHub Actions), and production support; BS in CS or related (MS preferred).
Python, AWS Lambda, Amazon API Gateway, CloudWatch, IAM, S3, Terraform, Jenkins, GitHub Actions, SQL, AWS SAM, Serverless Framework, EventBridge, SNS, SQS, Dynatrace, Datadog, OpenTelemetry, Git
2mo
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Sr. WMS Application Engineer
Carson, California, United States
OnsiteFull Time
5+ YOESenior WMS application engineering with experience in configuring SaaS/On-Premise WMS, API/EDI integrations, SQL reporting, and warehouse automation. Strong communication and project leadership required.
SQL, SSRS, Power BI, EDI, API, WMS, ERP, TMS, Stored Procedures, Warehouse Automation
3mo
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Sr. SW Test Engineer
Foster City, California, United States
$110k-$170k/yr HybridFull Time
2+ YOE2+ years experience with BS or 5+ years; strong API testing, automation, and QA; Agile tools; CI/CD; knowledge of Go/Scala; Jira/Confluence; distributed systems testing.
Jira, Confluence, SOAP UI, Postman, REST Client, Cucumber, Selenium, Gherkin, Jenkins, Go, Scala, Erlang, Git
1w
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Software Engineer, API Multimodal
San Francisco, California, United States
$293k-$385k/yr OnsiteFull Time
7+ YOE7+ years backend/infrastructure experience building and operating production APIs and distributed systems; proficiency with Python, Go, Rust, or TypeScript; strong systems fundamentals and product judgment.
Python, Go, Rust, TypeScript
2w
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Lead Software Engineer (API & Microservices development)
San Jose, California, United States
$215k-$245k/yr OnsiteFull Time
8+ YOE8+ years building backend services and microservices; hands-on experience with Go/C++/C#; REST API development; containerized architectures, Kubernetes, and DB integration; strong testing, CI/CD, and communication skills.
Go, C++, C#, Docker, Kubernetes, PostgreSQL, MongoDB, Python, React, TypeScript, rabbitmq, Kafka, CI/CD
1w
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Sr. Engineer, Software Development
New York City or Birmingham or Miami or Tampa or Blue Ash or Cincinnati or Los Angeles or San Francisco
$121k-$173k/yr HybridFull Time
5+ YOE5+ years software engineering experience with secure API/microservice development, cloud (Azure) and observability; 1+ year technical leadership; fintech or BaaS experience preferred.
C#, .NET, SQL, APIM, Azure SQL, Cosmos DB, Key Vault, Service Bus, Event Hubs, Datadog, Grafana, Git, OAuth2, Open API
1mo
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Sr Software Development Engineer, Product Engineering – API Platform & Agentic AI
Pleasanton, California, United States
$176k-$264k/yr HybridFull Time
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
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
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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Sr Workday Developer
Long Beach, California, United States
$13k-$195k/yr OnsiteFull Time
5+ YOE5+ years Workday development experience, deep expertise with integrations, security, reporting, REST/SOAP APIs, testing, and deployments; strong analytical and troubleshooting skills.
Workday Studio, Core Connectors, EIB, Document Transformation, Workday Web Services, Cloud Connect, REST, SOAP, Greenhouse
1mo
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Sr. Software Engineer
Gurugram or United States or California or Colorado or Connecticut or Maryland or Nevada or New Jersey or New York or Ohio or Rhode Island or Washington
RemoteFull Time
5+ YOE5+ years software development experience (or 3+ with advanced degree); strong Java or C# skills; full-stack experience with React/Angular, HTML/CSS, cloud-native architectures, AWS/Kubernetes, SQL/NoSQL, REST APIs, monitoring/OpenTelemetry; on-call and mentoring experience.
Java, C#, JavaScript, React, Angular, HTML, CSS, SQL, NoSQL, Amazon Web Services (AWS), Kubernetes, OpenTelemetry, Flutter, REST API
2w
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Lead Software Engineer (API & Microservices development)
San Jose, California, United States
$215k-$245k/yr OnsiteFull Time
8+ YOE8+ years building backend services, production REST APIs, microservices, container/Kubernetes experience, database integration (Postgres/MongoDB), strong testing/CI/CD and communication skills.
Go, C++, C#, Docker, Kubernetes, PostgreSQL, MongoDB, Python, React, TypeScript, RabbitMQ, Kafka, Azure, AWS, GCP
2mo
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Sr. Software Engineer II – Back End - Access Control
Los Angeles, California, United States
$146k-$165k/yr OnsiteFull Time
6+ YOE6+ years software engineering; BS in CS; C#/.NET Core; REST APIs in microservices; scalable systems; strong communication.
C#, .NET Core, REST APIs, Docker, Terraform, AWS, SQL (SQL Server, PostgreSQL, MySQL, Oracle), Kafka, Elasticsearch, DynamoDB, NoSQL
1mo
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Sr. Software Developer
Orange or Arizona or California or Florida or Maryland or Maine or Michigan or Missouri or North Carolina or Nevada or New York or Ohio or Oklahoma or Oregon or South Carolina or Texas or Utah or Washington or Wyoming
$120k-$145k/yr RemoteFull Time
7+ YOE7+ years professional software development with Microsoft .NET stack, experience with React/TypeScript, RESTful API design, Playwright, cloud deployments (AWS preferred), practical use of Claude or similar LLM agent tools, and demonstrated technical leadership.
ASP.NET WebForms, React, TypeScript, C#, .NET Web API, RESTful API, Claude, Redux Toolkit, Zustand, Playwright, CI/CD, Azure DevOps, AWS, ECS, Lambda, Step Functions, Bedrock, Azure, GCP
1mo
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Sr. Software Engineer
Monterey Park, California, United States
$180k-$210k/yr HybridFull Time
8+ YOE8+ years software development experience, strong Python and React/JavaScript skills, SQL proficiency, API/backend experience, leadership and mentoring ability; Bachelor’s in CS or equivalent experience.
Python, React, Javascript, SQL, Git, Docker, Kubernetes, CI/CD, Redux
1d
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Sr. Java backend developer
Sunnyvale, California, United States
$110k-$130k/yr HybridFull Time
12+ YOE12+ years of experience designing Java full-stack commerce solutions and Spring Boot microservices, with expertise in APIs, testing, cloud-ready architectures, security, performance, and data modeling.
Java, Spring Boot, Spring Boot microservices, RESTful, API, testing frameworks, build tools, version control systems, containerized deployments
3mo
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Sr. Heat Exchanger Engineer
El Segundo, California, United States
$165k-$180k/yr OnsiteFull Time
10+ YOESenior mechanical/thermal engineer with 10+ years in heat exchanger design; experienced with PCHEs, shell-and-tube, ASME/ API 661; startup/R&D background.
HTRI, Python, MATLAB
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