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Senior Api Developer Jobs in Wisconsin (NOW HIRING)

Nrg Bluewater Wind

WI · On-site

$120 - $180/hr

Senior Security Engineer About the Role The Security Engineer is a strategic, architecture-focused ... Apply Zero Trust and least-privilege principles to identity, access, API, MCP, connector, and ...

Up2date Technologies

Mobile Developer

Madison, WI · On-site

Madison, WI (Onsite) Job Type: Full-Time We are looking for a Mid-Senior Android Developer to join ... Required Skills: Kotlin Jetpack Compose Android XML MVVM / MVI / Clean Architecture REST API ...

DTN (Data Transmission Network)

WI · On-site

$115 - $165/hr

DTN is looking for a full stack Senior Software Engineer to join our team. In this role, you'll ... Lead the development and expansion of semantic API architecture including schema design, resolver ...

TIER4 GROUP

Sr. Full Stack Developer

Milwaukee, WI · Hybrid

Title: Sr Full Stack Developer Location: Milwaukee, WI preferred, willing to consider remote talent ... API-first design. Proven track record of optimally crafting and delivering significant and ...

Pwc

Guidewire Developer, Senior Associate

Milwaukee, WI · On-site

$77K - $202K/yr

As a Guidewire developer at PwC, you will specialise in developing and customising applications ... Rest Client API and SOAP APIs - Experience with Spring Boot Application Development Travel ...

Profectus IT BVBA

WI · On-site

$80 - $120/hr

Solid experience with Angular (preferably Angular 10+). * Good understanding of RESTful API design ... Knowledge of CI/CD pipelines and DevOps practices is a plus. Preferred Skills * Experience with ...

MGIC

Senior Java Developer

Milwaukee, WI · On-site

$105.59 - $179.51/hr

Senior Java Developer page is loaded## Senior Java Developerlocations: Milwaukee, WItime type: Full ... Working knowledge of Spring, Hibernate, API development, web-enabled applications, and relational ...

Harris

$125K - $135K/yr

MVVM, The Composable Architecture) and dependency injection frameworks such as Koin. - RESTful API ... GitHub Copilot, Claude, Cursor or ChatGPT) - Familiarity with AI directed prompt engineering for ...

Harris

$125K - $135K/yr

MVVM, The Composable Architecture) and dependency injection frameworks such as Koin. - RESTful API ... GitHub Copilot, Claude, Cursor or ChatGPT) - Familiarity with AI directed prompt engineering for ...

Jobgether

WI · On-site

$110 - $150/hr

Our partner is looking for a Senior QA Engineer (Mobile) - Cupid Media based in Belgium. This role ... Perform functional, exploratory, regression, UI/UX, and end-to-end API testing across real devices ...

New

Komatsu

Senior ServiceNow Developer

Milwaukee, WI · On-site

$140K - $150K/yr

Senior ServiceNow Developer Posting Start Date: 7/16/26 Job Location (Short): Chicago, Illinois ... API, SOAP, MID Server, JDBC, Integration Hub spokes, and Plug-ins/Store apps. • Excellent ...

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All JobsApi Developer JobsSenior Api Developer JobsSenior Api Developer Jobs in Wisconsin

Senior Api Developer information

See Wisconsin salary details

$15

$62

$88

How much do senior api developer jobs pay per hour?

As of Aug 11, 2026, the average hourly pay for senior api developer in Wisconsin is $62.31, according to ZipRecruiter salary data. Most workers in this role earn between $52.88 and $69.86 per hour, depending on experience, location, and employer.

What is the difference between Senior Api Developer vs API Engineer?

AspectSenior API DeveloperAPI Engineer
Required CredentialsBachelor's in CS or related, experience in API developmentBachelor's or higher in CS, software engineering, or related field
Work EnvironmentSoftware development teams, tech companies, startupsDevelopment teams, cloud services, enterprise environments
Employer & Industry UsageTech firms, SaaS providers, e-commerceCloud providers, enterprise software, API platforms
Common Search & ComparisonOften compared for API design and development rolesFocuses on API infrastructure and deployment

While both roles involve working with APIs, a Senior API Developer primarily designs, develops, and maintains APIs, focusing on functionality and integration. An API Engineer often emphasizes the infrastructure, deployment, and scalability of APIs within larger systems. Understanding these distinctions helps employers and professionals choose the right role for their needs.

What is a senior API developer?

Senior API Developers are experienced software engineers who specialize in designing, building, and maintaining Application Programming Interfaces (APIs) that allow different software systems to communicate. They often lead technical projects, mentor junior developers, and ensure APIs are secure, scalable, and well-documented. Senior API Developers typically work with a variety of programming languages and frameworks, and collaborate closely with other teams to align API solutions with business goals.

What skills and qualifications are needed to thrive as a senior API developer?

To thrive as a Senior API Developer, you need advanced programming skills (often in languages such as Java, Python, or Node.js), deep understanding of API design principles, and experience with RESTful and/or GraphQL APIs, typically supported by a relevant degree or professional experience. Familiarity with API management tools (like Postman, Swagger, or Apigee), cloud platforms (such as AWS or Azure), and knowledge of authentication protocols (OAuth, JWT) are vital. Strong problem-solving abilities, effective communication, and leadership skills help in collaborating across teams and mentoring junior developers. These competencies ensure robust, scalable API solutions that meet business needs and integrate seamlessly with other systems.

Are senior API developers in demand?

Senior API developers are in high demand due to the increasing reliance on web services and integrations across industries. They are often required to have expertise in RESTful and GraphQL APIs, programming languages like Java or Python, and experience with cloud platforms, making their skills highly sought after in the job market.

How do senior API developers typically collaborate with product managers and frontend teams during the development process?

Senior API Developers play a key role in bridging backend systems with product and frontend teams. They work closely with product managers to interpret business requirements into technical specifications for APIs. Regular collaboration with frontend developers ensures that APIs are designed for usability, performance, and scalability, often involving code reviews, feedback sessions, and iterative testing. Effective communication and proactive problem-solving are essential to align API functionality with both business objectives and user experience.
What are the most commonly searched types of Api Developer jobs in Wisconsin? The most popular types of Api Developer jobs in Wisconsin are:
What are popular job titles related to Senior Api Developer jobs in Wisconsin? For Senior Api Developer jobs in Wisconsin, the most frequently searched job titles are:
What job categories do people searching Senior Api Developer jobs in Wisconsin look for? The top searched job categories for Senior Api Developer jobs in Wisconsin are:
What cities in Wisconsin are hiring for Senior Api Developer jobs? Cities in Wisconsin with the most Senior Api Developer job openings:
Senior Api Developer jobs near you
Infographic showing various Senior Api Developer job openings in Wisconsin as of August 2026, with employment types broken down into 79% Full Time, 7% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $129,601 per year, or $62.3 per hour.

Senior Integrations Engineer

Evans Transportation, Inc

Delafield, WI • On-site

$53 - $68.25/hr

Full-time

Re-posted 2 days ago

Job description

POSITION SUMMARY
We are seeking an experienced Senior Integrations Engineer to build and support enterprise integrations that connect customers, partners, and internal business systems. This role will spend most of its time developing integrations within the Evans integration platform while helping execute our long-term strategy to migrate integrations away from legacy applications.
This is not a traditional software engineering role; however, prior software engineering experience is essential. The ideal candidate understands how enterprise applications are built and integrated, allowing them to implement reliable, scalable, and maintainable solutions while contributing informed recommendations during technical solution discussions.
This is a highly collaborative, customer-facing position that works daily with Engineering, Operations, Sales, Customer Success, and customers throughout the integration lifecycle.
ROLES AND RESPONSIBILITIES
  • Design, build, test, deploy, and maintain enterprise integrations using Evans integration platform.
  • Develop workflow-based integrations leveraging REST APIs, event-driven architectures, message queues, and data transformation.
  • Own integrations from technical discovery through production deployment and ongoing operational support.
  • Build resilient integrations that prioritize:
  • Data integrity
  • Idempotency
  • Error handling and recovery
  • Telemetry and observability
  • Retry and resiliency patterns
  • Configure integrations between custom applications and commercial off-the-shelf (COTS) software platforms.
  • Participate in customer technical discovery sessions to understand business processes and integration requirements.
  • Recommend implementation approaches and identify technical risks while partnering with Evans technology leadership on solution direction.
  • Troubleshoot production issues, participate in incident reviews, and continuously improve integration reliability.
  • Create and maintain technical documentation for implemented integrations.

Requirements
Required
Prior experience as a Software Engineer, Integration Engineer, or Solutions Engineer with hands-on implementation responsibilities.
Experience building enterprise API integrations.
Strong understanding of REST APIs and API lifecycle concepts.
Experience with event-driven architectures and message-based integrations.
Strong knowledge of JSON, XML, data mapping, and ETL processes.
Experience integrating custom applications with commercial software platforms.
Understanding of authentication and authorization protocols, including OAuth and OpenID Connect.
Working knowledge of Amazon cloud services.
Ability to communicate effectively with both technical and non-technical stakeholders.
Comfortable leading technical discovery conversations and asking thoughtful questions before proposing solutions.
Preferred
Experience with Boomi, MuleSoft, or other enterprise integration/iPaaS platforms.
Familiarity with Enterprise Integration Patterns and API-first design principles.
Experience with EDI integrations.
Exposure to enterprise architecture practices.
Familiarity with .NET application development.
WORK ENVIRONMENT
Work is performed in an office environment. The noise level in the work environment is usually moderate. The work environment characteristics described here are representative of those an individual encounters while performing the essential functions of this position.

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