37 api developer jobs at 28 companies in Middleton, WI

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
3w
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Software Engineer III - Tech Lead
Plano or Madison
$90k-$126k/yr HybridFull Time
Horace Mann
Horace MannNYSE: HMN: Providing insurance and financial solutions to educators and their families.
7+ YOEBachelor's in CS/IT or equivalent, 7+ years software development experience, technical leadership experience, strong proficiency with Java, .NET, SQL, DB2, SSIS, C#, COBOL, APIs; DevOps/CI/CD and AI experience preferred.
Java, .NET, SQL, DB2, SSIS, C#, COBOL, APIs, CI/CD pipelines, AI services
2w
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Enterprise Application Developer II
Madison or Cedar Rapids
$79k-$102k/yr OnsiteFull Time
Alliant Energy
Alliant EnergyNASDAQ: LNT: Provides regulated electricity and natural gas services to customers.
3+ YOE3 years related experience; preferred bachelor's in IT; experience with React, APIs, Azure, Sitecore, integrations, Agile; apply AI and DevSecOps practices.
React, APIs, Azure, Sitecore, DevSecOps, Artificial Intelligence
1mo
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Application Development Engineer (Hybrid)
Madison, Wisconsin, United States
$80k-$131k/yr HybridFull Time
American Family Insurance
American Family Insurance: Provides diverse insurance products and comprehensive financial services.
2+ YOEProficiency with Guidewire (Gosu) and PolicyCenter/BillingCenter/ClaimCenter, AI/ML and generative AI integration, GW Cloud migration experience, SQL, APIs, CI/CD, SDLC, Agile; 2+ years Guidewire/product upgrade experience.
GOSU, Guidewire PolicyCenter, Guidewire BillingCenter, Guidewire ClaimCenter, PCF, GW Cloud, AI/ML, SQL, APIs, web services, CI/CD
3d
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Full Stack Developer
Madison, Wisconsin, United States
$85k-$117k/yr RemoteFull Time
Syms Strategic Group
Syms Strategic Group: Provides IT and professional services to federal government agencies.
8+ YOEU.S. citizen with eligibility for Public Trust clearance; 8+ years software development experience with strong back-end focus (Java/NodeJS), RESTful API design, Angular front-end, AWS cloud, Git/GitHub, and healthcare data experience.
Java, NodeJS, Angular, C#, .Net, TypeScript, XML, JSON, AWS, Azure, API Gateway, Lambda, S3, CloudWatch, Git, GitHub, JUnit, Jest, Docker, ECS, EKS, JIRA, Microsoft Teams
2w
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Data Engineer - .NET Web Development
Middleton or Madison
OnsiteFull Time
Sentry Insurance
Sentry Insurance: Provides commercial insurance, life insurance, and retirement plans.
2+ YOEBachelors required; minimum 2 years data engineering experience. Proficiency with Microsoft .NET, C#, REST API, JavaScript, ASP.NET MVC, SQL Server, Visual Studio/VS Code/SSMS, Git, Postman, Bootstrap, AutoMapper; agile and software design principles.
Microsoft .NET, C#, REST API, JavaScript, ASP.NET MVC, HTML, CSS, SQL Server, Microsoft Visual Studio, Microsoft Visual Studio Code, Microsoft SQL Server Management Studio, Git, Postman, Bootstrap, AutoMapper
4w
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Sr. Digital Engineer
Madison or United States
$100k-$115k/yr RemoteFull Time
Duluth Trading Company
Duluth Trading CompanyNASDAQ: DLTH: Retailer of workwear, casual apparel, and outdoor accessories.
5+ YOEBachelor's in CS (or equivalent), 5+ years software development, full-stack and PWA experience, proficiency with JavaScript/Python/Ruby, HTML5/CSS3/Node.js, REST APIs, strong communication, and US work authorization required.
JavaScript, Python, Ruby, HTML5, CSS3, Node.js, REST APIs
1d
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Artificial Intelligence Engineer III
Madison or Kingwood
HybridFull Time
Insperity
InsperityNew York Stock Exchange: NSP: Provides human resources and business performance solutions to businesses.
5+ YOEBachelor's or equivalent experience, 5+ years in software/ML/AI engineering, advanced Python and API skills, experience with large-scale data platforms and LLM systems, familiarity with AI orchestration frameworks, strong communication.
Python, APIs, Snowflake, Databricks, Amazon Redshift, Microsoft Synapse, LangChain, LangGraph, LlamaIndex, Semantic Kernel
1d
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Wisconet Web Developer
Madison, Wisconsin, United States
$75k/yr HybridFull Time
University of Wisconsin–Madison
University of Wisconsin–Madison: Public research university providing academic programs and clinical healthcare.
1.5+ YOE18+ months building web apps with React and Tailwind CSS, experience creating weather/environmental visualizations, RESTful APIs, frontend mapping and visualization tools, UX knowledge, strong communication.
React, Tailwind CSS, RESTful APIs, MapBox, Recharts, D3, HighCharts, Git, SVN
4w
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Full Stack Engineer-Remote
Madison, Wisconsin, United States
$130k-$150k/yr RemoteFull Time
Flexion
Flexion: Enterprise software development and agile consulting firm.
5+ YOE5+ years enterprise development experience with Java and Spring Boot, RESTful APIs, SQL/NoSQL, TDD and Agile practices; bachelor's degree or commensurate experience; strong collaboration and communication skills; ability to deliver high-quality code.
Java, Spring Boot, RESTful APIs, SQL, NoSQL, Test-Driven Development, ChatGPT, Notebook
2mo
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Senior AI Solutions Engineer
Oconomowoc, Wisconsin, United States
HybridFull Time
Bruno Independent Living Aids
Bruno Independent Living Aids: Manufacturer of mobility and accessibility products for homes and vehicles.
6+ YOEBachelor’s in CS or related field; 6+ years progressive exp, 3 in manufacturing; AI-first development with agentic LLM tools; polyglot across languages; SQL, REST APIs, system integrations, GIT, BI, vendor mgmt; strong prompt engineering.
Claude Code, GitHub Copilot, Cursor, Windsurf, Epicor, Jitterbit, Salesforce, SQL, GIT
2w
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Senior Staff Engineer
Madison, Wisconsin, United States
$180k-$220k/yr HybridFull Time
Recovery.com
Recovery.com: Matches patients with mental health and addiction treatment centers.
10+ YOE10+ years professional software engineering experience; deep TypeScript/full-stack expertise; proven architecture, API, scalability, and reliability experience; strong communication and mentorship skills.
TypeScript, React, Next.js, Node.js, PostgreSQL, Algolia, AWS, GCP, Vercel, Cloudflare
2mo
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Senior Software Engineer
Madison, Wisconsin, United States
$100k-$144k/yr RemoteFull Time
Resource Innovations
Resource Innovations: Provides clean energy services and software solutions for utilities.
6+ YOEExpertise in PHP, Laravel, Vue.js; 10+ years with PHP frameworks; 6+ years with Vue; API design; AWS; Git; SaaS experience; testable code with Pest/PHPUnit; agile team experience.
Laravel, Vue.js, Tailwind CSS, PHP, Pest, PHPUnit, AWS, NodeJS
1mo
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Geospatial Backend Developer – Multiple Positions at Junior/Mid/Senior Levels
Springfield or Vienna or St. Louis or Sun Prairie
OnsiteFull Time
NV5
NV5: Provides engineering, consulting, and geospatial solutions for infrastructure projects.
2+ YOEUS citizen with active/current Top Secret/SCI clearance, Bachelor's in CS/Engineering/GIS/STEM, 2+ years backend development experience using Python/Node.js/Java, ArcGIS Enterprise experience, containerization (Docker/Kubernetes), REST API design, and cloud familiarity.
Esri, ArcGIS Enterprise, ArcGIS Enterprise SDKs, Python, Node.js, Java, Docker, Kubernetes, PostgreSQL, PostGIS, Microsoft SQL Server, Azure, AWS, GCP, REST
2mo
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Software Developer
Monroe, Wisconsin, United States
OnsiteFull Time
Colony Brands
Colony Brands: Operates multi-channel retail brands and catalog sales for consumer products.
1+ YOEBS in Computer Science or equivalent, 1+ years software development experience, experience with .NET Core/C#, RESTful APIs, microservices, MySQL/Dynamo, Azure DevOps, Git, AWS preferred; strong analytical and communication skills.
.NET Core, C#, RESTful API, Python, MySQL, Dynamo, Azure DevOps, Pipelines, CI/CD, Git, AWS
2mo
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Senior Fullstack Engineer, Solve
Austin or Madison or San Francisco
$145k-$217k/yr HybridFull Time
Zendesk
Zendesk: Provides cloud-based software for customer service and support.
3+ YOE3+ years of production software experience; backend-first with APIs, async systems, integrations, and real-time systems; ownership of features end-to-end; experience with real-time or event-driven tech such as WebSockets/WebRTC.
Python, FastAPI, React, TypeScript, WebRTC, Redis, MongoDB, LLM / speech
3d
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Senior Software Engineer - IBM App Connect Enterprise
Irving or Middleton or Denver or Seattle
$95k-$150k/yr HybridFull Time
Paradigm
Paradigm: A software transforming residential and construction industries with modern engineering and cloud-native integration solutions.
4+ YOE4+ years software engineering with hands-on IBM App Connect Enterprise, ESQL/Java, integration patterns, APIs, messaging (MQ/Kafka), Kubernetes/OpenShift, CI/CD and strong troubleshooting skills.
IBM App Connect Enterprise, ACE, ESQL, Java, REST, SOAP, IBM MQ, MQ, Kafka, DFDL, JSON, XML, Docker, Kubernetes, Red Hat OpenShift, Git, Jenkins, Tekton, UrbanCode, AppDynamics, Splunk, ELK, HTTP(S), JDBC
3mo
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Senior iOS Software Engineer
Madison or Chicago or United States
$190k-$224k/yr RemoteFull Time
Fetch
Fetch: Mobile platform rewarding consumers for scanning retail and dining receipts.
5+ YOESenior iOS engineer with 5+ years of shipping iOS apps, strong Swift/SwiftUI, async/await, Combine, MVVM, dependency injection, modular architecture, debugging, API integration, and cross-functional teamwork.
Swift, SwiftUI, Combine, async/await, Dependency Injection, MVVM, Modular Architecture
3mo
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Mobile Engineer
Madison, Wisconsin, United States
HybridFull Time
Sub-Zero Group
Sub-Zero Group: Manufactures premium luxury kitchen refrigeration and cooking appliances.
3+ YOE3-5 years mobile development; 2+ years Flutter/Dart; RESTful APIs; cross-platform mobile app experience; UI/UX consistency; data modeling and database knowledge.
Flutter, Dart, RESTful APIs, Microsoft Dynamics CRM, Web-based CMS
1mo
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Software Engineer - AI & Cloud Engineering (Early to Mid Career, WI Based)
Madison, Wisconsin, United States
OnsiteFull Time
Flexcompute
Flexcompute: Develops GPU-native multiphysics simulation software for hardware engineers.
3+ YOE3-6 years software engineering; strong programming in Python/C++/Rust/Go/Java/JavaScript; backend systems/APIs/distributed services; Linux/Git; ability to drive projects; degree in technical field
Python, C++, Rust, Go, Java, JavaScript, Linux, Git, Docker, Kubernetes, AWS, GCP, Azure
2mo
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Power Automate/Power Platform Developer
Cottage Grove, Wisconsin, United States
OnsiteFull Time
Johnson Health Tech
Johnson Health TechTaiwan Stock Exchange: 1736: Designs and manufactures commercial and residential fitness equipment.
4+ YOE4+ years application development / systems integration; 3+ years Power Automate and Power Platform; REST APIs, JSON, OAuth; Dynamics 365, SAP, Azure; Bachelor's degree.
Power Automate, Azure Logic Apps, Azure Functions, Dataverse, REST APIs, JSON, OAuth, Service Principals, Power Platform governance, DLP policies