27 api java developer jobs at 10 companies in Greenfield, WI
5d
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AWS Platform/API Engineer
North Chicago, Illinois, United States
$152k-$184k/yr HybridFull Time
5+ YOEBachelor's degree in a related engineering or computer science field and 5 years of platform/API engineering experience, including AWS coding, Python or Java, infrastructure as code, containers, CI/CD, and automation.
AWS, Python, Java, JavaScript, Node.js, AWS CloudFormation, Terraform, Docker, Kubernetes, AWS CodePipeline, Azure DevOps, GitHub, Bash
2w
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Integration Developer (840017)
Pewaukee or Illinois or Iowa or Michigan or Minnesota
$1/yr HybridFull Time
2+ YOEBachelor’s degree in Computer Science, Information Systems, or related field; 2+ years of API/SDK integration experience; proficiency in Python, PHP, JavaScript, Java, JSON, REST APIs, Git, and integration tools.
Python, JSON, RESTful APIs, PHP, Postman, Bruno, Swagger/OpenAPI, Git, JavaScript, Java, OAuth, OpenID Connect, SQL, ETL, WCAG, FERPA, Banner, Ellucian
2w
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Knowledge Engineer Manager - Back-end Engineer
Seattle or Milwaukee or Dallas or Columbus or Kirkland or Cincinnati or New York City or Cleveland or Oklahoma City or Austin or Albany or Chicago or St. Petersburg or Hartford or Pittsburgh or St. Louis or Miami or Sacramento or Raleigh or Minneapolis or Mountain View or Scottsdale or San Francisco or Morristown or Denver or Boston or Philadelphia or Des Moines or Overland Park or Los Angeles or Charlotte or Walnut Creek or Carmel or Houston or Arlington or Atlanta or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego
$80k-$294k/yr HybridFull Time
5+ YOEMinimum 5 years in knowledge graph hydration, ontology mapping, graph and relational databases, vector databases, Python or Java, and REST API development; bachelor's degree or equivalent experience required.
RDF, OWL, SKOS, RDFS, SPARQL, R2RML, CSVW, SHACL, GraphDB, Stardog, Neo4j, Amazon Neptune, PostgreSQL, MySQL, SQL Server, Pinecone, Weaviate, Milvus, Qdrant, Elasticsearch, OpenSearch, Python, Java, SQL, JSON, XML, CSV, REST APIs, Apache NiFi, Airflow, Docker, Kubernetes, Helm, AWS Neptune, Azure Cosmos DB, GCP, Kafka, RabbitMQ, Git, GraphQL APIs, D3.js, Cytoscape.js, Terraform
3mo
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Staff Software Engineer
Milwaukee, Wisconsin, United States
OnsiteFull Time
4+ YOEBachelor's degree in CS or related field; 4+ years in software development; experience with React, TypeScript, Java, Spring Boot; REST APIs; MySQL and MongoDB; distributed web systems; agile practices; leadership experience.
React, Webpack, TypeScript, CSS, HTML, Jest, MySQL, MongoDB, Java, SpringBoot
1d
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Senior Backend Engineer
Chicago or Milwaukee or Atlanta or Jacksonville
$123k-$209k/yr HybridFull Time
5+ YOE5+ years of software engineering experience preferred, with Java, Spring Boot, Micronaut, RESTful APIs, microservices, PostgreSQL, Redis, AWS, Kubernetes, and Docker experience.
Java, JavaScript, TypeScript, RESTful APIs, Spring Boot, Micronaut, PostgreSQL, Redis, AWS, Kubernetes, Docker, Jenkins, Git, Jira, Confluence, Temporal, ActiveMQ, ReactJS
1w
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Knowledge Engineer Manager - Back-end Engineer
United States or 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
$80k-$294k/yr HybridFull Time
5+ YOERequires 5+ years in knowledge graphs, ontology mapping, R2RML, graph and relational databases, vector databases, Python or Java, REST APIs, and a bachelor's degree or equivalent.
RDF, OWL, SKOS, RDFS, SPARQL, R2RML, CSVW, SHACL, GraphDB, Stardog, Neo4j, Amazon Neptune, PostgreSQL, MySQL, SQL Server, Pinecone, Weaviate, Milvus, Qdrant, Elasticsearch, OpenSearch, Python, Java, SQL, JSON, XML, CSV, REST APIs, Apache NiFi, Airflow, Docker, Kubernetes, Helm, AWS Neptune, Azure Cosmos DB, GCP, Kafka, RabbitMQ, Git, GraphQL, D3.js, Cytoscape.js, Terraform
1w
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
3+ YOE3–5 years of full-stack development experience; proficiency with front-end and back-end frameworks, REST APIs, databases, cloud platforms, Git, CI/CD, Agile, and AI/ML or LLM integrations.
.NET, .NET Core, C#, Microsoft Azure, Azure App Services, Azure Functions, Azure SQL, Azure Storage, React, Angular, Vue, Node.js, Python, Java, RESTful APIs, Web API, OpenAI, Azure AI, Azure OpenAI, LangChain, Git, CI/CD, AWS, GCP
1w
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
3+ YOERequires 3–5 years of full-stack development experience, front-end and back-end frameworks, REST APIs, databases, AI/ML or LLM integration, cloud platforms, Git, CI/CD, and Agile practices.
Microsoft .NET, .NET Core, C#, Microsoft Azure, Microsoft Azure App Services, Microsoft Azure Functions, Microsoft Azure SQL, Microsoft Azure Storage, React, Angular, Vue, Node.js, Python, Java, OpenAI, Azure AI, Azure OpenAI, LangChain, Git, CI/CD, AWS, GCP, RESTful APIs, Web API
1w
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
3+ YOERequires 3–5 years of full-stack development experience, front-end and back-end framework proficiency, REST APIs, databases, AI/ML or LLM integration, cloud deployment, Git, CI/CD, and Agile practices.
.NET, .NET Core, C#, Microsoft Azure, Azure App Services, Azure Functions, Azure SQL, Azure Storage, React, Angular, Vue, Node.js, Python, Java, RESTful APIs, Web API, OpenAI, Azure AI, LLM, Azure OpenAI, LangChain, AWS, GCP, Git, CI/CD, Agile
1w
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Sr. Software Engineer (Data & Application Engineer)
Cincinnati or Atlanta or Hopkins or Chicago or Gresham or Denver or Charlotte or Brookfield or Irving or Earth City
$112k-$131k/yr HybridFull Time
5+ YOEBachelor’s degree or equivalent experience and 5–6 years of relevant experience; strong programming, data engineering, API, cloud, DevOps, database, and secure software development skills.
Java, Python, SQL, JavaScript, Git, CI/CD, DevOps
1mo
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Sr. Automation Test Engineer
North Chicago, Illinois, United States
RemoteFull Time
8+ YOEUS citizen able to pass IT-II background; 8+ years software testing,5+ years Java+Selenium automation; experience with API, performance and CI/CD testing; familiarity with Jenkins,AWS,JMeter,POSTMAN; strong communication and Agile experience.
Java, Selenium, JMeter, POSTMAN, Cucumber, Jenkins, AWS, TestNG, Gatling, OWASP, Zephyr, TestRail, JIRA, Confluence, SpecFlow
3w
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AI Integration Architect
Milwaukee or Irvine or Dallas or Austin or United States
$134k-$200k/yr OnsiteFull Time
7+ YOE7–10 years software engineering/architecture experience building LLM-powered or agentic AI applications; strong backend skills (Python/Java/.NET); API, security, and CI/CD experience; familiarity with agentic frameworks and AI observability.
LangChain, LlamaIndex, AutoGen, Python, Java, .NET, OAuth 2.0, JWT, Apigee, Kong, MCP, LiteLLM, Snowflake, Databricks, GCP, Docker, Kubernetes, Terraform, NVIDIA Device Plugins, CUDA, ROCm, vLLM, Triton
5d
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ERP Systems Analyst
Milwaukee, Wisconsin, United States
RemoteFull Time
5+ YOERequires 5+ years supporting or developing manufacturing ERP systems, IBM i experience, RPG/CL/DB2/SQL knowledge, troubleshooting skills, and strong communication. Bachelor's degree preferred; equivalent experience considered.
Infor XA, IBM i, RPG III, RPG IV, ILE RPG, CL, CLLE, DB2, SQL, Query/400, MAPICS, Power-Link, System-Link, Enterprise Integrator, Power BI, PowerShell, Python, Java, C#, JavaScript, .NET, APIs, EDI