910 api developer jobs at 436 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
3mo
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API Engineer
Scott AFB, Illinois, United States
$87k-$198k/yr OnsiteFull Time
Backend/platform engineering with Java or Python, experience operating API gateways (Apigee, Kong, Mulesoft, AWS API Gateway), DevOps (Docker, Helm, Kubernetes, GitOps), cloud (AWS/Azure/GCP), Git/Jenkins/JIRA, and eligible for Secret clearance; HS diploma/GED required.
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
1mo
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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
1mo
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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
1w
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Sr. Developer, API
Illinois, United States
$119k-$155k/yr RemoteFull Time
5+ YOERequires 5+ years of security engineering experience, 3+ years in cloud infrastructure security, IaC, IAM, secure cloud architecture, AI/ML security, API security, scripting, and security tooling; bachelor's degree or equivalent experience.
RESTful, GraphQL, AWS API Gateway, Kafka, AWS EventBridge, AWS Lambda, Step Functions, Auth0, Okta, OAuth 2.0, OpenAI, RAG, Google Gemini, Datadog, Terraform, AWS CDK, AWS Organizations, Control Tower, Elasticsearch, OneTrust, GitHub Actions, Azure DevOps, GitLab CI, Jenkins, CloudFormation, ARM, Kubernetes, SAST, DAST, SCA, Python, OAuth/OIDC, RBAC, SOC 2, ISO 27001, NIST, iOS, Android
2w
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z/OS Connect API Engineer
Chicago or Atlanta or Dallas or New Jersey or Nashville
$73k-$174k/yr OnsiteFull Time
Experienced engineer skilled in IBM z/OS Connect, REST APIs, OpenAPI, CICS, COBOL, DB2, enterprise security, CI/CD, GitHub, and Gradle; able to modernize mainframe services.
IBM z/OS Connect Enterprise Edition, REST, OpenAPI, Swagger, YAML, JWT, OAuth 2.0, OpenID Connect (OIDC), RACF, GitHub Actions, Gradle, CICS, COBOL, DB2, GitHub, Git, JSON, XML, Java, Spring Boot
1w
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Lead Software Engineer, API Integrations
Chicago, Illinois, United States
$150k-$170k/yr HybridFull Time
7+ YOERequires 7–10+ years designing, developing, implementing, and supporting applications, with expertise across .NET, C#, APIs, databases, Azure cloud, integrations, security, and enterprise architecture.
Microsoft .NET Framework, Microsoft .NET Core, C#, ASP.NET Core, Web API, JSON, Entity Framework, React, HTML5, CSS, JavaScript, jQuery, AJAX, VB.NET, SQL, PL/SQL, TypeScript, Python, Java, Node.js, ASP.NET, Web Forms, MVC, LINQ, SQL MI, SQL Server, SSIS, Databricks, Azure Data Factory, JIRA, GitHub, Jenkins, Azure DevOps, ASP.NET Core Identity, Entra ID, OAuth, OpenID, Microsoft Azure, Azure App Services, Azure Functions, Azure Storage, Azure Key Vault, Azure Monitor, Application Insights, Azure AD, Fenergo CLM, Salesforce CRM
2mo
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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
5d
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Sr External Web Application & API Security Engineer
Chicago, Illinois, United States
$138k-$173k/yr OnsiteFull Time
5+ YOEBachelor's degree or equivalent experience; 5+ years security engineering, including 3+ years hands-on API security. Requires WAF/API platforms, cloud, security telemetry, scripting, and SIEM/SOAR integrations.
REST, GraphQL, SOAP, gRPC, HTTP, TLS, JSON, OAuth 2.0, OpenID Connect, JWT, AWS, Microsoft Azure, Google Cloud Platform, Terraform, Akamai API Security, Akamai App & API Protector, OpenAPI, SIEM, SOAR, CI/CD, DevSecOps, WAF
2mo
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Senior Software Engineer - Customer Integrations (API)
United States or New York City or Dallas or Austin or Houston or Chicago or Nashville or Miami or Atlanta
$140k-$160k/yr RemoteFull Time
3+ YOE3+ years building backend services with Go/Java/Python/C#; strong API design, SQL/PostgreSQL, cloud (AWS/Azure/GCP/OCI) and Terraform experience; professional software engineering experience and strong communication/system design skills.
Go, Java, Python, C#, SQL, PostgreSQL, AWS, Azure, GCP, OCI, Terraform
2mo
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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
1w
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Sr. Software Engineer II, Platform/API
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 country_code
$140k-$190k/yr HybridFull Time
6+ YOE6+ years building and operating backend services; Node.js, TypeScript, SQL, Docker, Kubernetes, cloud, event-driven architecture, and workflow reliability expertise. Bachelor's or master's degree or equivalent experience.
Node.js, TypeScript, Kafka, Google Cloud Pub/Sub, SQL, Docker, Kubernetes, Google Cloud Platform, Codex, Cursor, Claude Code, Statsig
3d
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Dotnet Developer
Lisle, Illinois, United States
OnsiteContract
5+ YOERequires 5+ years of ASP.NET/.NET Core development with C# or VB.NET, 3+ years of ReactJS, SQL expertise, web API testing, Agile practices, and familiarity with cloud, CI/CD, Git, and Kubernetes.
ASP.NET, .NET Core, C#, VB.NET, Visual Studio, ReactJS, Web APIs, HTML, XML, CSS, JSON, JavaScript, jQuery, SQL, SOAP, REST, GitFlow, Kubernetes, ADO, JIRA, CI/CD, TFS, GIT, Azure, Telerik
5d
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Transformation Senior Process Engineer- API
North Chicago, Illinois, United States
$97k-$184k/yr OnsiteFull Time
6+ YOEBachelor's degree in engineering or science desired, or equivalent technical experience; 6+ years of engineering or operations experience desired. Requires technical, financial control, risk management, and project leadership competence.
3w
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Software Engineer I
Chicago, Illinois, United States
$80k-$100k/yr RemoteFull Time
2+ YOEBachelor's degree or equivalent experience; 2–4 years developing software with Microsoft's platform; C#, ASP.NET/MVC, Web APIs, WCF, SQL Server, RESTful APIs, and cloud familiarity.
Microsoft platform, C#, ASP.NET, MVC, Web APIs, WCF, SQL Server, TDD, CI/CD, Agile, RESTful APIs, Azure, AWS, Joget, VB6, Classic ASP, HIPAA, HITECH
1mo
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(Remote) Software Developer
Blair or British Columbia or Manitoba or Ontario or Alberta or Saskatchewan or Wisconsin or Arizona or Nebraska or Utah or Texas or Minnesota or Tennessee or South Dakota or Kansas or Iowa or Illinois or North Dakota or Missouri or Colorado
$40k-$65k/yr RemoteFull Time
Proven software development experience with MSSQL, REST API, C#, .NET Core, and Angular; associates degree in CS/Engineering; valid passport and ability to travel ~10%; strong communication and problem‑solving.
MSSQL, REST API, C#, .NET Core, Angular, Typescript, HTML, CSS, Azure, AWS, GitHub
5d
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Mulesoft Developer
Albany or Arlington or Atlanta or Austin or Beaverton or Bentonville or Boston or Carmel or Charlotte or Chicago or Cincinnati or Cleveland or Columbus or Culver City or Denver or Des Moines or Detroit or Hartford or Houston or Irving or Kirkland or Miami or Milwaukee or Minneapolis or Morristown or Mountain View or Nashville or New York City or Oklahoma City or Overland Park or Philadelphia or Pittsburgh or Raleigh or Redmond or Sacramento or San Diego or San Francisco or Scottsdale or Seattle or St. Louis or St. Petersburg or Walnut Creek or United States
$54k-$196k/yr OnsiteFull Time
3+ YOERequires 3+ years software development, 2+ years API development and Git/Agile/testing, 1+ year MuleSoft development, MuleSoft Developer Level 1, and a bachelor's degree or equivalent experience.
Anypoint Platform, Anypoint Studio, Mule Runtime, DataWeave, MUnit, Git, SOAP, REST, XML, JSON, YAML, Anypoint MQ, API Manager, Anypoint Exchange, CloudHub, Salesforce, SAP, Workday, Oracle Cloud Applications, ServiceNow, CI/CD, AWS, Azure, Flex Gateway, Model Context Protocol (MCP), GenAI, HL7, FHIR, Boomi, Informatica, SnapLogic, Workato
3w
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Full Stack Developer
Naperville or Denver
$95k-$115k/yr HybridFull Time
2+ YOEBachelor's degree or equivalent experience, 2–5 years of professional experience, and development experience with Java, Node.js, SQL, Python, APIs, relational databases, and Unix shell scripting.
Java, Node.js, SQL, Python, HTTP, JSON, WebSockets, ClaudeCode, GitHub Copilot, Unix, Microsoft SQL Server, PostgreSQL, Azure SQL, Oracle, APIs
1d
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Generative AI Developer
White Plains or Conyers or Roanoke or Charleston or Maitland or Kingsport or Schaumburg or Lihue or Albany or Denver or Missoula or Virginia Beach or Livonia or Greenville or Richmond or Fort Lauderdale or Thomaston or Frederick or Hibbing or Miami or Appleton or Jackson or Kailua-Kona or Ridgeland or Kokomo or Irvine or Newport or Polson or Lexington or Mobile or Fort Myers or Medford or Wilmington or Bethesda or Chattanooga or Kalispell or Macon or Tampa or Overland Park or Columbia or West Palm Beach or Ashburn or Phoenix or San Antonio or Austin or Yakima or Madras or Portland or Helena or Tallahassee or Delafield or New York City or San Ramon or Southborough or Boston or San Francisco or Nashville or Fargo or Boise or Scottsdale or Spokane or Eugene or Newnan or Thomasville or Westlake or Melville or Tequesta or Canonsburg or Philadelphia or Chicago or Dublin or Jacksonville or Los Angeles or Carrollton or Atlanta or Norwalk or Southfield or Milwaukee or King of Prussia or Bismarck or San Diego or Troy or Chagrin Falls or Washington or Wenatchee or High Point or Bonita Springs or Fremont or Hardinsburg or Irving or Simi Valley or New Iberia or Walla Walla or Winston-Salem or Red Bank or Lafayette or Raleigh or Palm Beach or Golden Valley or Urbandale or Memphis or Cookeville or Vero Beach or Baton Rouge or Providence
$83k-$125k/yr RemoteFull Time
10+ YOERequires 10+ years of technology experience, Python, AI application and agentic system development, LLM platforms, RAG, vector databases, APIs, observability, and governance in production environments.
Python, LangChain, LangGraph, DSPy, Anthropic, OpenAI, GPT-4, Claude, Pinecone, Milvus, CI/CD, API, RAG
1mo
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Senior Application Developer
United States or Illinois
$110k-$140k/yr RemoteFull Time
4+ YOE4+ years professional C#/.NET development experience, ASP.NET MVC/Web API, Entity Framework, SQL Server, cloud (Azure/AWS) experience, CI/CD and source control (Git); leadership and communication skills.
.NET, C#, ASP.NET MVC, Web API, Entity Framework, JavaScript, HTML, CSS, Angular, React, SQL Server, Azure, AWS, Git, Docker, Kubernetes
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