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242 api developer jobs at 135 companies in Wisconsin

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
U.S. Bank
U.S. BankNew York Stock Exchange: USB: Diversified financial services and banking institution.
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
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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
NinjaTrader
NinjaTrader: Privately held futures trading platform and brokerage serving retail and professional futures traders.
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
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1w
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Senior Software Developer
Wisconsin, United States
RemoteFull Time
WennSoft
WennSoft: Private field service and construction software provider serving skilled-trades contractors with job costing and workflow tools.
Hands-on full-stack development role building secure, scalable, multi-tenant SaaS software with Azure, APIs, integrations, testing, data modeling, and AI-assisted development.
Microsoft Azure, Azure AI Foundry, Microsoft Dynamics 365 Business Central, Microsoft Power Platform, APIs
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3w
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Website Developer
Elmwood, Wisconsin, United States
OnsiteFull Time
Mark Anderson Companies
Mark Anderson Companies: Private Wisconsin animal-health manufacturer and supplier serving veterinarians, animal caregivers, and livestock producers.
2+ YOEWebsite development experience with HTML, CSS, JavaScript, responsive design, APIs, integrations, troubleshooting, and SEO. Associate or bachelor's degree preferred; 2+ years of professional experience preferred.
Shopify, WordPress, Epicor ECC, Magento, GoDaddy, WooCommerce, Square, QuickBooks, HTML, CSS, JavaScript, API, JSON, XML, PHP, Shopify Liquid, Git
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5d
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Process Automation Developer
Lincoln or Brownsville or Centennial or Madison
$65k-$75k/yr HybridFull Time
Nelnet
NelnetNew York Stock Exchange: NNI: Public diversified holding providing student-loan servicing, education technology, payment processing, government services, and consumer lending.
1+ YOERequires 1+ year Python development and data environment experience, U.S. citizenship, ability to obtain 6C clearance, and proficiency with automation, APIs, databases, testing, and agile development.
Python, SQL, Microsoft Office, Kanban, APIs, databases
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2mo
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Senior Telephony Engineer
Madison, Wisconsin, United States
$99k-$167k/yr HybridFull Time
American Family Insurance
American Family Insurance: Mutual U.S. insurance providing auto, home, life and business coverage to individuals and businesses.
3+ YOEMinimum 3 years of heavy Node.js experience, Java application and API development, complex software development, systems integration, SDLC, design specifications, testing, and technical communication.
Node.js, Java, API, Genesys, SDLC
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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
Harris Computer
Harris Computer: Global provider of mission-critical vertical market software solutions.
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
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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
Accenture
AccentureNYSE: ACN: Global professional services delivering 360° value.
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
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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
Marsh McLennan Agency
Marsh McLennan Agency: Marsh McLennan Agency is a wholly owned insurance brokerage serving middle-market businesses and individuals.
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
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6d
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Mulesoft Developer
New York City or Milwaukee or Dallas or Columbus or Kirkland or Cincinnati 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 Seattle or Houston or Arlington or Atlanta or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego
$54k-$196k/yr OnsiteFull Time
Accenture
AccentureNYSE: ACN: Global professional services delivering 360° value.
3+ YOERequires 3+ years software development, 2+ years API development and Git/Agile/testing, 1+ year MuleSoft experience, MuleSoft Developer Level 1 certification, and a bachelor's degree or equivalent experience.
Anypoint Platform, Anypoint Studio, Mule Runtime, DataWeave, MUnit, Git, Java, XML, JSON, YAML, Anypoint MQ, API Manager, Anypoint Exchange, CloudHub, Salesforce, SAP, Workday, Oracle Cloud Applications, ServiceNow, AWS, Azure, Flex Gateway, Model Context Protocol (MCP), Boomi, Informatica, SnapLogic, Workato
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2mo
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Sr Developer - Enterprise Integration
Milwaukee, Wisconsin, United States
$89k-$105k/yr OnsiteFull Time
Johnson Controls
Johnson ControlsNYSE: JCI: Global leader in smart, healthy, and sustainable building solutions.
6+ YOE6–9 years of integration development experience with Azure Integration Services, Azure API Management, C#, .NET, REST APIs, JSON, XML, CI/CD, distributed architectures, and debugging.
Azure Integration Services, Logic Apps, Azure Functions, Data Factory, Service Bus, Event Grid, Azure API Management, Azure DevOps, GitHub Actions, Infrastructure as Code (IaC), C#, .NET, REST APIs, JSON, XML, Azure Monitor, Application Insights, GitHub Copilot, M365 Copilot, MuleSoft
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1mo
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Senior Palantir Engineer
Austin or Charlotte or Naples or Hudson or Milwaukee
OnsiteFull Time
CliftonLarsonAllen
CliftonLarsonAllen: Professional services firm providing audit, tax, and consulting services.
4+ YOE4+ years relevant experience, Bachelor’s degree, Palantir Foundry experience preferred, proficiency with TypeScript, JavaScript, Python, SQL, APIs, Git, CI/CD, and agentic/LLM development.
Palantir Foundry, TypeScript, JavaScript, Python, SQL, APIs, Git, CI/CD, MCP, LLMs
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3w
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Senior Full Stack Developer
Minnesota or Wisconsin or St. Paul
$103k-$134k/yr HybridFull Time
Affinity Plus Federal Credit Union
Affinity Plus Federal Credit Union: Member-owned, not-for-profit Minnesota credit union providing personal and business banking, loans, cards, and financial guidance.
5+ YOERequires 5+ years of programming experience, advanced full-stack development, relational databases, API design, SDLC, CI/CD, DevOps, problem-solving, communication, and project execution skills.
Azure DevOps, AWS, CI/CD, API, SDK, SDLC
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1w
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Senior Software Engineer III
Madison or Philadelphia or Boulder or Los Angeles
$120k-$125k/yr RemoteFull Time
Revolution
Revolution: A micromobility that designs and operates bike share systems across North America.
8+ YOEComputer science degree or equivalent experience and 8–10+ years in software development. Requires .NET, C#, OOP, Git, ASP.NET MVC, ORM, SQL Server, REST APIs, HTML, CSS, JavaScript, and agile experience.
.NET, C#, Git, ASP.NET MVC, SQL Server, MSSQL, RESTful APIs, Web API, ASP.NET Core, HTML 5, CSS 3.0, Bootstrap, Javascript, .NET MAUI, Linux, Docker, Microsoft Azure, HTTPS, OAuth2, CI/CD
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Interactive Technology Developer (Unity)
Milwaukee, Wisconsin, United States
RemoteFull Time
Stamm Media
Stamm Media: Nationwide event-technology providing audiovisual production, equipment rental, interactive media, and digital experiences for brands and agencies.
Strong Unity and C# proficiency, professional Unity development experience, experience integrating SDKs/APIs and hardware, familiarity with networking protocols (OSC, TCP/IP, UDP, WebSockets, HTTP/REST), camera/sensor/tracking experience preferred, strong problem-solving and communication skills.
Unity, C#, DMX, OSC, WebSockets, TCP/UDP, HTTP APIs, TCP/IP, UDP, REST APIs, MediaPipe, OpenCV, ZED, Azure Kinect, Intel RealSense, TouchDesigner, Linux, JavaScript, HTML, V systems, AI
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5d
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RPA Jr. Developer
Pleasant Prairie, Wisconsin, United States
HybridFull Time
Arvato Group
Arvato Group: International services group providing supply-chain, financial, IT, and business-processing solutions to corporate clients.
5+ YOERequires 5+ years of hands-on RPA experience, programming and API development knowledge, database and Agile experience, and strong analytical, communication, troubleshooting, and project management skills.
UiPath, Blue Prism, Automation Anywhere, HTML, JavaScript, SAP, SQL, NoSQL, Azure Data Factory, Azure Logic Apps, C/C++, Python, BPMN, VB Script, Ruby, Java, JS, .Net, Microsoft Power Automate, Microsoft PowerApps
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1d
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Sr. Software Engineer - NA UGG
Arizona or California or Colorado or Connecticut or Massachusetts or Minnesota or New Jersey or New York or Oregon or Texas or Wisconsin
$97k-$130k/yr RemoteFull Time
Deckers Brands
Deckers BrandsNYSE: DECK: Global designer and marketer of innovative footwear and apparel.
5+ YOE5+ years as a front-end developer in e-commerce or consumer-facing environments; HTML, JavaScript, CSS, React, Bootstrap, Vue, APIs, CMS, Scrum/Agile, web accessibility, and mentoring experience required.
HTML, JavaScript, CSS, React, Bootstrap, Vue, ADA, WCAG, APIs, widgets, content management systems, SCRUM, Agile
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2w
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
Cognizant
CognizantNASDAQ: CTSH: Global professional services providing technology and consulting services.
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
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
Cognizant
CognizantNASDAQ: CTSH: Global professional services providing technology and consulting services.
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
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2w
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Full Stack Developer with AI - Hybrid
Milwaukee, Wisconsin, United States
$55k-$114k/yr HybridFull Time
Cognizant
CognizantNASDAQ: CTSH: Global professional services providing technology and consulting services.
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
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