956 api developer jobs at 399 companies in Illinois
API Developer (US)
New York City or Austin or Dallas or Chicago or Seattle
$90k-$150k/yr HybridFull Time
3+ YOEBachelor's degree in Computer Science or related field; 3-10 years API development experience; proficiency in Python, Java, JavaScript/Node.js, or C#; REST APIs, OAuth 2.0, JWT, SQL, Agile/Scrum, Git, Postman.
REST, GraphQL, Swagger, OpenAPI, OAuth 2.0, JWT, SQL, Git, Postman, Docker, Kubernetes, AWS, Microsoft Azure, Google Cloud
API Engineer
Scott Air Force Base, Illinois, United States
$87k-$198k/yr OnsiteFull Time
Experience designing and operating scalable API platforms, back-end engineering with Java or Python, DevOps and Kubernetes experience, familiarity with cloud providers, ability to obtain Security+ and hold Secret clearance.
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
API/Integration Engineer (Journeyman)
United States or Chicago
RemoteFull Time
6+ YOEActive Secret clearance or higher; bachelor's degree in computer science, IT, software engineering or related field; 6+ years relevant experience; software development, API, unit testing, secure coding, version control, interface development; relevant software/cloud certification.
Java, C#, .NET, Python, JavaScript, TypeScript, Node.js, AWS, Azure, Jira, Azure DevOps, Confluence, GitHub, GitLab, OpenAPI, JSON Schema, XML Schema, OAuth 2.0, OpenID Connect
API Engineer I - Credit
Alpharetta or Phoenix or Costa Mesa or Stamford or Lake Mary or Orlando or Chicago or Kansas City or New York or Charlotte or Cincinnati or Canton or West Chester or Dallas
$75k-$120k/yr HybridFull Time
2+ YOEBachelor's degree in computer science or related field, or high school diploma with 2 years Java development; legal authorization to work in the U.S. without sponsorship; willingness to take drug test, background check, and fingerprints; 18+ years old.
Java, Spring, Spring Boot, Jira, Bitbucket, Git, JSON, REST, XML
Java API / Publication Engineer
Chicago, Illinois, United States
$130k-$150k/yr HybridFull Time
10+ YOEBachelor's degree in computer science or related field; 10+ years backend development with 7+ years Java Spring Boot; AWS services (RDS, S3, SQS, Lambda, ECS/EKS, API Gateway); Docker, Kubernetes, CI/CD; OAuth2/JWT; financial data domain preferred.
Java, Spring Boot, Spring Data JPA, Spring Security, Spring Batch, AWS RDS, AWS S3, AWS SQS, AWS Lambda, AWS ECS, AWS EKS, API Gateway, Docker, Kubernetes, Jenkins, GitHub Actions, OAuth2, JWT, OpenAPI, Swagger, AWS Step Functions, React
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
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
Senior UI/UX & API Developer
Belleville, Illinois, United States
HybridFull Time
8+ YOE8+ years software development experience; strong JavaScript/TypeScript, HTML, CSS, React/Angular; RESTful APIs with Java/C#/Python; SQL; Git/CI/CD; Section 508; Bachelor's/Master's in CS or related or FITSP-D/GCSA/GISF/SSCP; active Secret clearance; U.S. person.
JavaScript, TypeScript, HTML, CSS, React, Angular, Java, C#, Python, OpenAPI, Swagger, SQL, Git, GitLab, Figma, Adobe XD, Sketch, Apache Superset, Oracle, PostgreSQL, Amazon Aurora, Amazon RDS, AWS
Senior Automation & API Engineer and Marketing Stuff Lover
Arizona or Colorado or Florida or Georgia or Illinois or Maryland or Michigan or North Carolina or New Jersey or New York or Pennsylvania or Texas or Virginia or Washington
RemoteFull Time
Expertise in REST APIs, JSON, webhooks, OAuth 2.0, API authentication, and integration architecture; experience with AI agents, agentic automations, Replit, Lovable, GoHighLevel, and AI-powered development; creativity and problem-solving skills.
Replit, Lovable, GoHighLevel, Hermes, REST APIs, JSON, Webhooks, OAuth 2.0, Git, OpenAI API, Claude, Anthropic, MCP, RAG, Python, JavaScript, TypeScript, Node.js, SQL, PostgreSQL, Supabase, GitHub, Make, Zapier, n8n, Cloudflare, AWS, Google Cloud, Twilio, Stripe
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
Sr External Web Application & API Security Engineer
Chicago, Illinois, United States
$138k-$173k/yr OnsiteFull Time
5+ YOEBachelor's degree in Computer Science, Engineering, IT, Cybersecurity or related field; 5+ years security engineering with 3+ years hands-on API security; strong knowledge of REST, GraphQL, API gateways, microservices, HTTP, TLS, JSON, OAuth 2.0, OpenID Connect, JWT, API keys, mutual TLS; experience with enterprise API security and WAF platforms; s...
Terraform, Git, Akamai API Security, Akamai App & API Protector, OpenAPI, GraphQL, AWS, Microsoft Azure, Google Cloud Platform, SIEM, SOAR
Software Engineer L2-Messaging API
United States or San Francisco or Oakland or San Jose or Colorado or Hawaii or Illinois or Maryland or Massachusetts or Minnesota or Vermont or Washington, D.C. or New York or New Jersey or Washington or California
$117k-$172k/yr RemoteFull Time
Bachelor's or master's degree in computer science or equivalent experience; Go or Java experience; strong communication skills; ability to join an on-call rotation. NoSQL, AWS, Docker, Kubernetes, and Temporal preferred.
Go, Java, NoSQL, DynamoDB, AWS, Docker, Kubernetes, Temporal
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
Principal Systems Engineer - Enterprise API Platform & GraphQL Engineering
Hopkins or Denver or Atlanta or Chicago or Saint Paul or Earth City or Charlotte or Cincinnati or Gresham or Irving or Brookfield +1 more
$120k-$141k/yr HybridFull Time
7+ YOEBachelor's degree or equivalent; 7+ years IT experience; 7+ years technology infrastructure design/development/support; experience with Apigee, Apollo GraphQL, Kubernetes, Azure, GitLab CI/CD, Ansible, Python, Bash; must work from U.S. Bank location 3+ days/week.
Apigee OPDK, Apigee Hybrid, Apollo GraphQL, Apollo Federation, Apollo Router, OAuth 2.0, JWT, mTLS, GitLab CI/CD, Kubernetes, Helm, Ansible, Infrastructure as Code, Azure, Python, Bash, Datadog
Project Engineer - API Pilot Plant
North Chicago, Illinois, United States
$66k-$126k/yr HybridFull Time
2+ YOEBachelor's degree in chemical or mechanical engineering or equivalent; 2+ years relevant engineering/operational experience desired; working knowledge of process equipment, P&ID, instrumentation, and control systems; strong communication and teamwork skills.
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