458 sr api developer jobs at 256 companies in Illinois
2mo
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API Engineer
Scott Air Force Base, Illinois, United States
$87k-$198k/yr HybridFull Time
Experienced backend/platform engineer designing, deploying, and operating enterprise API platforms; Java or Python; Docker, Helm, Kubernetes, GitOps; API gateways and cloud (AWS/Azure/GCP); Secret clearance; HS diploma or GED.
Java, Python, Apigee, Gravitee, Kong, AWS API Gateway, Mulesoft, Docker, Helm, Kubernetes, GitOps, HTTP, gRPC, WebSockets, AWS, Azure, GCP, Git, Jenkins, JIRA, Confluence, Nexus, Bitbucket, SQL, Node.js, Groovy, Scala, Spring Cloud, Spring Core, Spring Boot, Spring Data, Kafka, RabbitMQ
2w
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Principal Engineer API Platform
Minnesota or New York or Texas or Illinois
$144k-$288k/yr RemoteFull Time
10+ YOE3+ Mgmt10+ years software engineering with enterprise API design, API security (OAuth2/OIDC/mTLS), API gateways, cloud platforms, Java/Node.js, and experience shaping technical direction across teams.
OAuth 2.0, OIDC, mTLS, Apigee, Kong, Azure APIM, JavaScript, TypeScript, Node.js, React, Java, Spring Boot, GCP, AWS, Azure, GraphQL, Kafka, FHIR, HL7, MCP, CI/CD, LLM
2w
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Senior API Integration Developer
Bloomington, Illinois, United States
$113k-$156k/yr HybridFull Time
7+ YOE7+ years integration experience with MuleSoft and Azure APIM, strong API design, DataWeave/JSON/XML/SQL skills, CI/CD and production support experience.
Mule 4, Anypoint Platform, CloudHub 2.0, DataWeave, RAML, OpenAPI, REST, SOAP, JSON, XML, SQL, Azure API Management, Azure Functions, Logic Apps, App Services, Service Bus, Key Vault, CI/CD, Git, Splunk, Dynatrace, Azure Monitor, Application Insights, MuleSoft Anypoint Monitoring, MUnit, OAuth 2.0, OpenID Connect, JWT
3mo
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Sr. Software Engineer
Chicago, Illinois, United States
$119k-$148k/yr RemoteFull Time
5+ YOE5+ years backend development; API-based services; Node.js/NestJS; React/TypeScript; PostgreSQL/MySQL; Redis; Kafka; AWS; Docker/Kubernetes; CI/CD; testing; observability; on-call readiness; AI tooling.
Node.js, NestJS, React, TypeScript, REST APIs, PostgreSQL, MySQL, Redis, Kafka, Jest, phpunit, Cypress, Playwright, AWS, Docker, Kubernetes, AI tools
1mo
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Senior Software Engineer (Hogan API)
Hopkins or Atlanta or Chicago or Charlotte or Englewood or Brookfield or Irving
$120k-$141k/yr HybridFull Time
5+ YOEBachelor's degree or equivalent and 5+ years relevant experience. Experience with mainframe/Hogan development (COBOL, JCL, CICS), APIs, system design, testing, security, and cross-team collaboration; Scrum familiarity.
Hogan COBOL, JCL, CICS, JSON, Splunk, IMS Database, GitLab, IDz/RDz (IBM Developer for zOS), Jira
2mo
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Sr. Software Engineer
Oak Brook, Illinois, United States
OnsiteFull Time
5+ YOEBS in CS or related field or equivalent; 5+ yrs distributed multi-tier software development; strong comms; lead experience; proficient in C#/NET, HTML/JS; SQL Server; API development; Agile; OOP/SOLID.
C#/.NET, HTML, JavaScript, jQuery, Angular 2+, Microsoft SQL Server, Entity Framework, API development, Git, TFVC, Visual Studio, Azure, AWS, Azure DevOps, N Telerik Kendo UI, NativeScript, Xamarin, Windows UWP, OOP, SOLID
2mo
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Sr. Manager, Software Engineering - API
Florida or Texas or Illinois or New York or New Jersey or Alabama or Arizona or Arkansas or Colorado or Connecticut or Delaware or Georgia or Indiana or Kansas or Massachusetts or Missouri or North Carolina or Tennessee or Utah or Wisconsin
$174k-$189k/yr RemoteFull Time
7+ YOE7+ MgmtLead API platform strategy, manage teams, design API governance, and drive cloud-native infrastructure—REST/GraphQL/gRPC with AWS/Kubernetes.
REST, GraphQL, gRPC, MCP, Kong, Apigee, AWS API Gateway, AWS, Kubernetes, OpenAPI/Swagger, Protocol Buffers, OAuth 2.0, JWT, mTLS, Istio, Linkerd, Terraform, CI/CD
1mo
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Cloud & API Platforms Practice Lead (AVP)
St. Louis or Chicago or Boston or Houston or Dallas or Irvine or Minneapolis or Detroit or Alpharetta or New York City
$150k-$250k/yr OnsiteFull Time
10+ YOE5+ Mgmt10–15 years experience with 5+ years leading practices; expertise in Platform API and IBM Cloud solutions, hands-on consulting, GTM strategy, partner/channel relationships, AI delivery knowledge, and willingness to travel.
MuleSoft, Apigee, Boomi, Workato, TIBCO, Terraform, IBM Cloud
2mo
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Sr. AI Integration Engineer
Des Moines or Ashburn or Austin or Chaska or Chicago or Dallas or Lewisville or Kansas City or Nashville or Florida or Georgia or North Carolina or New Jersey or Pennsylvania
HybridFull Time
5+ YOE5+ years in software engineering, systems integration, and AI-enabled workflow delivery; experience with enterprise integrations (ServiceNow, Salesforce), cloud deployments, Python, APIs, and middleware.
Python, JavaScript, TypeScript, Java, C#, APIs, ServiceNow, Salesforce, Kubernetes, Docker, AWS, Azure, GCP, SQL, LangChain, LlamaIndex, Semantic Kernel
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
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
22h
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Sr. Software Engineer, Data Products
Chicago, Illinois, United States
$105k-$175k/yr HybridFull Time
5+ YOEMinimum 5 years in data engineering or software development; production software, backend services, APIs, databases, testing, cloud infrastructure, AI-assisted engineering, and on-call experience required.
BigQuery, Airflow, SQL, CI/CD
2mo
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Sr. Software Engineer
Wayne or Naperville
$120k-$135k/yr HybridFull Time
5+ YOE5–7 years backend engineering or intelligent systems with production impact; strong Python, CI/CD, and system design; experience with ML model APIs and cloud inference; familiarity with vector databases and retrieval systems.
Python, CI/CD, AWS Bedrock, Azure OpenAI, Google Vertex AI, PyTorch, Hugging Face Transformers, vLLM, FAISS, Pinecone, OpenSearch/KNN, LangChain, LlamaIndex, MLflow, Weights & Biases, Prometheus
5d
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Sr. Software Engineer (.Net Full Stack)
Peoria or Tempe or Alpharetta or Peoria
$96k-$138k/yr HybridFull Time
8+ YOE8+ years software development experience; strong C#/.NET full‑stack skills with Blazor, REST APIs, microservices; experience with MongoDB, Microsoft SQL Server, Kafka, Git, CI/CD and AI-assisted development tools.
C#, .NET, Blazor, Razor, HTML5, CSS3, JavaScript, MongoDB, Microsoft SQL Server, Kafka, Git, CI/CD, GitHub Copilot, ChatGPT, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG)
3w
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Sr. Software Engineer I, Evaluation Services
Chicago or California or Colorado or Florida or Georgia or Illinois or Indiana or Minnesota or Missouri or Montana or New Jersey or New York or North Carolina or Ohio or Oregon or Pennsylvania or South Carolina or Texas or Utah or Vermont or Virginia or Washington or Wisconsin or District of Columbia
$125k-$175k/yr HybridFull Time
5+ YOE5+ years software engineering with API development and partner integrations; strong REST/WebSocket/JSON/OAuth skills; proficiency in TypeScript/JavaScript or Python; excellent troubleshooting and communication.
REST APIs, WebSockets, JSON, OAuth, Postman, curl, browser developer tools, network analyzers, TypeScript, JavaScript, Python, React, Node.js, Swagger/OpenAPI, ReadMe
3w
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Sr. Streaming Engineer
Chicago, Illinois, United States
OnsiteFull Time
5+ YOE5+ years building high-speed data solutions using Java, distributed streaming frameworks (Flink/Spark/Kafka Streams), message brokers, cloud platforms (AWS/GCP), DevOps tooling, and automated testing.
FLINK, Apache Spark, Kafka Streams, Kafka, RabbitMQ, ActiveMQ, Amazon Kinesis, AWS, EC2, RDS, S3, KMS, AWSCLI, IAM, Google, Junit, Citrus, Git, Terraform, Ansible, Jenkins, Kubernetes, Helm, CI/CD pipeline, Splunk, ElasticSearch, Prometheus, AppDynamics, Java, Spring, SpringBoot, Microservices, REST API, Unix/Linux
3w
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Sr. Streaming Engineer
Chicago, Illinois, United States
OnsiteFull Time
5+ YOE5+ years building high-speed data-centric solutions using Java, stream frameworks, message brokers, cloud services, CI/CD and DevOps tools; BS in Computer Science required.
Java, FLINK, Apache Spark, Kafka Streams, Kafka, RabbitMQ, ActiveMQ, Amazon Kinesis, AWS, VPCs, Security groups, EC2, RDS, S3, ACLs, KMS, AWSCLI, IAM, Google, Junit, Citrus, Git, Terraform, Ansible, Jenkins, Kubernetes, Helm, CI/CD, Splunk, ElasticSearch, Prometheus, AppDynamics, Spring, SpringBoot, Microservices, REST API
4d
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Sr. Software Engineer - Test (SDET)
Scottsdale or San Francisco or Chicago or New York City
$106k-$130k/yr HybridFull Time
5+ YOEBachelor's degree required. 5+ years developing software or test automation using two of Java, Ruby, Node.js, or Objective-C. Experience with CI/CD, test automation for API/web/mobile, and test frameworks.
Java, Ruby, Node.js, Objective-C, GitLab, GIT, Eclipse, Android Studio, Xcode, Bamboo, Harness, Splunk, AppDynamics, Appium, Selenium, WebDriver, Rest-Assured, Cucumber, AWS, Kubernetes, BrowserStack, Perfecto Mobile, Device Anywhere, Amazon Device Farm
2mo
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Sr. Software Engineer
Oakbrook Terrace, Illinois, United States
$96k-$128k/yr OnsiteFull Time
5+ YOE3+ Mgmt5+ years software development experience, 3+ years technical lead experience; proficiency with C#/.NET, web technologies, SQL Server, EM frameworks, API development, and strong communication skills.
C#/.NET, HTML, JavaScript, CSS, jQuery, Angular, Microsoft SQL Server, Entity Framework, Git, TFVC, Visual Studio 2017+, Microsoft Azure, AWS, Azure DevOps, Telerik Kendo UI, NativeScript, Xamarin, Windows UWP, HoloLens, Artificial Intelligence, Machine Learning, AI Chatbot, IoT
1mo
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Sr. Software Engineer I
Atlanta or Boston or Chicago or Indianapolis or United States or Canada or North America
RemoteFull Time
4+ YOE4+ years professional software development experience; React and modern JavaScript framework proficiency; experience with LLMs/generative AI and cloud-native architectures; REST/RPC/GraphQL APIs, testing, CI, and strong communication skills.
React, LLMs, GraphQL, REST, RPC
2mo
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Sr Software Engineer (Hybrid) Bolingbrook, IL
Bolingbrook, Illinois, United States
$117k-$133k/yr HybridFull Time
5+ YOE5+ years with C#/.NET; UI frameworks; REST APIs; SQL; cloud deployments (Azure/AWS); strong problem-solving and communication.
C#, .NET, JavaScript, SQL, Azure, AWS, REST, Blazor, React, Angular, Vue, CSS
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