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198 sr api developer jobs at 124 companies in Lancaster, CA

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
Green Dot
Green DotNYSE: GDOT: Provides mobile banking and payment solutions to consumers and businesses.
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
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2mo
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Sr. Software Engineer II – Back End - Access Control
Los Angeles, California, United States
$146k-$165k/yr OnsiteFull Time
AXS
AXS: Provides digital ticketing and marketing solutions for live events.
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
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1mo
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Sr. Software Engineer
Monterey Park, California, United States
$180k-$210k/yr HybridFull Time
Astrana Health
Astrana HealthNASDAQ: ASTH: Operates technology-powered platforms to coordinate and deliver medical care.
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
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1mo
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Sr Aderant Engineer
Reston or San Diego or San Francisco or Washington or Wilmington or Phoenix or Los Angeles or Houston or Boston or Austin or Atlanta or Raleigh or Baltimore or New York or Dallas or Palo Alto or Short Hills or Minneapolis or Chicago or Seattle or Philadelphia or Miami
$113k-$179k/yr HybridFull Time
DLA Piper
DLA Piper: Global law firm providing comprehensive legal and business services.
5+ YOE5+ years supporting Aderant Expert and enterprise financial/practice management systems, strong backend development and SQL skills, experience with integrations/APIs, bachelor's in CS/IT, analytical and troubleshooting ability.
Aderant Expert, SQL, APIs
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2d
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Sr. Software Support Engineer
Northridge, California, United States
$133k-$138k/yr HybridFull Time
MiniMed Group
MiniMed GroupNasdaq: MMED: An insulin delivery developing connected systems and support for people living with diabetes.
5+ YOEBachelor's degree in engineering or related technical field plus 5 years of progressive post-baccalaureate experience; 5 years with AWS, ELK, Oracle, Jenkins, testing frameworks, mobile/API services, SQL, REST, and SOAP UI.
AWS CloudWatch, AWS Athena, AWS Lambda, Amazon S3, ELK, Elastic Stack, Jira, ServiceNow, Oracle, MySQL, Bluetooth, TCP/IP, Wi-Fi, Jenkins, JMeter, Charles Proxy, API, IoT, SQL, REST, SOAP UI
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1mo
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Sr. Software Engineer, AI Native
Culver City or San Diego
$180k-$205k/yr HybridFull Time
Sony
SonyNYSE: SONY: Sells consumer electronics, video games, and entertainment media.
5+ YOE5+ years experience in full-stack development with Java, Go, or Python; REST API and frontend (HTML/CSS/JavaScript/React) proficiency; hands-on experience with AI-native coding tools, prompt engineering, agent development, and participation in on-call rotations.
Java, Go, Python, HTML, CSS, JavaScript, React, Angular, Ember, Jest, Babel, TypeScript, Claude Code, Cursor, GitHub Copilot, RESTful API, AWS, Docker, Kubernetes, Terraform, Ansible, Jenkins, BMad Method, SAFe, Scrum
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1mo
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Sr Software Engineer
Santa Monica or New York City or Glendale
$142k-$190k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces media content and operates global theme parks.
5+ YOEBachelor's degree or equivalent experience, 5+ years related experience, hands-on Scala/Java, API design (REST/gRPC), event-driven systems (Kafka/RabbitMQ/AWS SNS/SQS), cloud (AWS/Spinnaker/Kubernetes), and on-call experience.
Scala, Java, REST, gRPC, Kafka, RabbitMQ, AWS SNS/SQS, AWS, Spinnaker, Kubernetes, Cats Effect
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Sr Software Engineer
Santa Monica or New York City or Glendale
$142k-$190k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces movies, operates theme parks, and provides streaming services.
5+ YOEBachelor's degree or equivalent experience, 5+ years related experience, hands-on Scala/Java, API design (REST, gRPC), event-driven systems (Kafka, RabbitMQ, AWS SNS/SQS), exposure to AWS/Spinnaker/Kubernetes, strong system design, on-call experience.
Scala, Java, REST, gRPC, Kafka, RabbitMQ, AWS SNS/SQS, AWS, Spinnaker, Kubernetes, Cats Effect
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3w
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Sr. Software Engineer - Patient Onboarding (Remote)
Los Angeles or United States
$173k-$203k/yr RemoteFull Time
Rula
Rula: Connects patients with insurance-covered therapists through a digital platform.
5+ YOE5+ years building production web apps; strong API design, data modeling, distributed systems, full‑stack competency, ownership of initiatives, mentoring, and use of AI-assisted development tools.
Claude Code
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3w
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Sr. Full Stack Engineer
Tempe or Burbank
$135k-$163k/yr HybridFull Time
Entertainment Partners: Provides payroll and workforce management for entertainment productions.
6+ YOE6+ years software engineering experience, strong Python (FastAPI), React.js/TypeScript, API and database expertise, CI/CD and cloud experience, LLM/AI integration, bachelor's degree or equivalent.
Python, FastAPI, React.js, TypeScript, PostgreSQL, MySQL, MongoDB, ORMs, GitHub Actions, Jenkins, Microsoft Azure DevOps, Docker, Kubernetes, AWS, Azure, OCI, OpenAI, Anthropic/Claude, LangChain, LangGraph, pgvector, Pinecone, Weaviate, WebSockets, SSE, JWT, OAuth2
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1mo
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Sr Software Engineer II - Fullstack - Apex Events- AXS
Los Angeles, California, United States
$145k-$165k/yr HybridFull Time
AEG Worldwide
AEG Worldwide: Operates live entertainment venues and professional sports franchises worldwide.
6+ YOE6+ years software development, strong full‑stack web experience with TypeScript/React or NextJS, C#/.NET Core, relational databases, RESTful APIs, and mentoring experience.
HTML, CSS, JavaScript, TypeScript, ReactJS, NextJS, C#, .NET Core, Microsoft SQL Server, Oracle, MySQL, PostgreSQL, AWS, NodeJS, Docker, Kubernetes, Git, CI/CD, Kafka, Elasticsearch, DynamoDB, TDD, BDD
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2mo
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Sr. Fullstack Product Engineer - (Frontend Focus)
Los Angeles, California, United States
$140k-$180k/yr RemoteFull Time
Salt AI
Salt AI: Provides an AI orchestration platform for life sciences organizations.
Deep frontend craft with React and TypeScript, strong product and design taste, fullstack production experience (Python/Django, APIs), experience with AI-assisted tooling, and ability to work remotely during US time zones.
React, TypeScript, Python, Django, Claude Code, Cursor, Codex, GitHub
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1mo
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Staff Search Engineer (US)
San Francisco or Los Angeles or New York City or Austin or London or Manila or Warsaw or United States
$150k-$188k/yr HybridFull Time
CreatorIQ
CreatorIQ: Software for managing and measuring enterprise influencer marketing campaigns.
7+ YOE7+ years software development experience, 3+ years Elasticsearch experience, strong CS fundamentals, Go/Golang development, AWS familiarity, REST API and high-load systems experience, Git and CI/CD proficiency, English communication.
Go, Golang, TypeScript, Elasticsearch, AWS CloudWatch, AWS SQS, AWS Lambda, Java, MSSQL, AWS Redshift, Python, PHP, JavaScript, Node.js, Laravel, Symfony, Kubernetes, CI/CD, Git, REST API
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1w
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Senior Staff Software Engineer
Beverly Hills or Vernon
OnsiteFull Time
Fashion Nova
Fashion Nova: Sells affordable trend-driven apparel and lifestyle accessories online.
10+ YOE10+ years software development experience; proficiency in Javascript, React, Node.js, REST/Web API, relational and NoSQL databases; strong analytical and communication skills; BA/BS or equivalent experience preferred.
Javascript, React, Node.js, REST, Web API, T-SQL, MS-SQL, POSTGRESQL, MYSQL, ORACLE, DynamoDB, Redis, JIRA, GIT, GITFLOW, Shopify
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1mo
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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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3d
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Developer, Mobile
Los Angeles, California, United States
HybridFull Time
Herbalife
HerbalifeNYSE: HLF: Sells nutrition, weight management, and personal care products globally.
5+ YOERequires 5+ years of mobile development experience, native iOS or Android expertise, cross-platform frameworks, mobile architecture, API integration, prototyping, analytics, security, CI/CD, and a bachelor's degree or equivalent experience.
Swift, SwiftUI, Kotlin, React Native, Flutter, MVVM, MVC, Clean Architecture, Xcode, Android Studio, Firebase, Crashlytics, Core Data, Room, Realm, SQLite, Fastlane, Jenkins, GitHub Actions, AWS, Azure, Google Cloud, ARKit, ARCore
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1mo
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Sr. Full-Stack Engineer
United States or Los Angeles or New York City
$160k-$180k/yr RemoteFull Time
Infera Health
Infera Health: AI-native quality management system for medical device manufacturers.
6+ YOE6+ years building production web applications across frontend and backend, strong React/TypeScript and Python, experience designing schemas/APIs, DevOps/Cloud experience preferred, familiarity with AI tooling.
React, TypeScript, Python, AWS, GCP
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1w
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GoLang Backend Developer
Mason or Woodland Hills
OnsiteContract
Delan Associates
Delan Associates: Provides engineering and professional services to government agencies.
12+ YOEStrong Go (Golang) backend development with microservices, RESTful APIs, Docker/Kubernetes, SQL/NoSQL, cloud platforms, CI/CD, unit testing, distributed systems, messaging, IaC (preferred), and security best practices.
Go (Golang), Docker, Kubernetes, PostgreSQL, MySQL, MongoDB, DynamoDB, AWS, Azure, GCP, Git, CI/CD, Terraform, Helm, Kafka, RabbitMQ
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2mo
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Founding Product Engineer
San Francisco or Los Angeles or New York City
$190k-$210k/yr HybridFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
Proficiency with TypeScript (React) and Go, experience with PostgreSQL and Redis, familiarity with AWS, Terraform, and Docker, API development experience, and prior B2C product experience.
TypeScript, React, Go, PostgreSQL, Redis, AWS, Terraform, Docker, REST, GraphQL, Slack, Linear, GitHub, Figma
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3w
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Staff Software Engineer
Beverly Hills, California, United States
$176k-$235k/yr OnsiteFull Time
WME Group
WME Group: Global holding for talent, media, and entertainment representation.
10+ YOE10+ years software engineering experience, full-stack web development, React/Next.js, API and backend design, cloud (AWS/Azure/GCP), strong product instincts, mentorship and AI-assisted development experience.
React, Next.js, AWS, Azure, GCP
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