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Senior Api Developer Jobs in Wisconsin (NOW HIRING)

Hive-X

WI · On-site

$80 - $110/hr

VERSION FR Function As a Senior .NET Developer, you play a key role in the design, development and ... NET Core Web API, Authentication/Authorization (JWT, OIDC, claims), Blazor, C# / .NET (Core, 10), ...

Silgancontainers

Senior AI Application Developer

Brookfield, WI · On-site

$90K - $125K/yr

Senior AI Application Developer Waukesha, Wisconsin * Applicants must be legally authorized to work ... API and connector patterns * Develop across a multi-language platform spanning Python, C#/.NET, and ...

Silgan

Senior AI Application Developer

Brookfield, WI · On-site

$90K - $125K/yr

Senior AI Application Developer Waukesha, Wisconsin Build the AI Applications Shaping the Future of ... API and connector patterns * Develop across a multi-language platform spanning Python, C#/.NET, and ...

Apex Systems

Senior Java Developer

Milwaukee, WI · On-site

$56.50 - $72/hr

Senior Application Developer (Java) PURPOSE We are seeking a Senior Application Developer ... REST API development * IBM MQ * Relational databases and SQL * JUnit and automated testing * Git ...

CVS Health Corporation

WI · On-site

$93 - $185/hr

## Senior Software Engineer iOSApplyremote type: Remote/Hybridlocations: TX - Work from hometime type ... API integrations, dynamic rich UI development, accessibility, security, and AI/LLM-powered ...

Accenture

Mulesoft Developer

Milwaukee, WI · On-site

$49.50 - $65.75/hr

You collaborate effectively with architects, senior developers, analysts, client stakeholders, and ... Experience working with Anypoint MQ, API Manager, Anypoint Exchange, and CloudHub deployments.

GBA Team

Senior Validation Engineer

Milwaukee, WI · On-site

$110 - $150/hr

... biotech, API, Medical Device and laboratory facilities. We are seeking an experienced Senior ... The Senior Validation Engineer is responsible for providing technical leadership and engineering ...

Compli

Senior Validation Engineer

Milwaukee, WI · On-site

$110 - $160/hr

... biotech, API, Medical Device and laboratory facilities. We are seeking an experienced Senior ... The Senior Validation Engineer is responsible for providing technical leadership and engineering ...

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 ...

TiTANS Consulting

WI · On-site

$80 - $110/hr

... Senior Test Automation Engineer met een sterke focus op backend testing en integraties ... Testen van API's, integraties en event-driven flows * Valideren van asynchrone communicatie tussen ...

Bakertilly

Sr. Systems Engineer - AI Platforms

Madison, WI

$105K - $144K/yr

The Senior Systems Engineer serves as the technical architecture authority for the platforms team ... The role also owns developer experience and onboarding for LLM tooling, including the OpenAI API ...

General Motors

WI · On-site

$202 - $310/hr

## Senior AI Workflow Engineer - Enterprise TransformationApplyremote type: Hybridlocations: Austin ... Deliver comprehensive technical documentation, API specifications, blueprint repositories, and ...

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Senior Api Developer information

See Wisconsin salary details

$15

$62

$88

How much do senior api developer jobs pay per hour?

As of Sep 3, 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 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.

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 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.

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 REST, SOAP, and API security, with many organizations seeking experienced professionals to build and maintain scalable, secure APIs. The demand is expected to grow as digital transformation accelerates and companies prioritize cloud-based solutions.

How much do senior API developers make?

Senior API developers typically earn between $100,000 and $150,000 annually, depending on experience, location, and industry. They often have expertise in RESTful APIs, programming languages like Java or Python, and may hold certifications that enhance their earning potential.

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 Developer .Net - Belgium (Hybrid)

Hive-X

WI • On-site

$80 - $110/hr

Other

Posted 16 days ago

Job description

VERSION FR Function As a Senior .NET Developer, you play a key role in the design, development and maintenance of robust software solutions based on Microsoft technologies. You bring your technical expertise to guarantee the quality of the code, the sustainability of the solutions and the performance of the systems. You are also a technical mentor to other team members. Responsibilities Actively participate in the development of software components in .NET (Framework and Core); Design scalable technical solutions in collaboration with the architecture team; Technically supervise team members and foster a culture of excellence; Carry out code reviews and ensure compliance with good development practices; Analyze functional needs with analysts and translate them into technical solutions; Ensure the quality, performance, security and maintainability of applications; Participate in optimizing system performance; Integrate and evaluate new technologies in line with business objectives. Behavioral skills Ability to critically analyze and integrate information; Structured and solution-oriented thinking; Ability to generate viable alternatives and draw relevant conclusions; Technical leadership and collaborative spirit; Resilience and adaptability in the face of technical or contextual changes. We offer you an interesting job in providing ICT and Data services that have an impact on society, with many advantages: A good balance between professional and private life; Flexible schedule in the provision of 40 hours per week (7:30 a.m. to 8 p.m. with fixed times between 9 a.m. and 12 p.m. and 1 p.m. and 4 p.m.); Possibility of teleworking; Workspaces organized according to activities; Easy accessibility via public transport; Car and bicycle parking in the building; Individual locker; Company restaurant; Several possibilities for self-development: Training and learning opportunities (to be followed outside of working hours) via our e-academy self-learning platform or via the Microsoft Enterprise Skills Initiative platform. ____________ NL VERSIE Functie Als Senior .NET Developer speel je een sleutelrol bij het wentwerpen, ontwikkelen en onderhouden de robuste software oplossingen op la base de Microsoft technologiesën. I provide technical expertise, guarantee code knowledge and support the technical mentor of your team. Verantwoordelijkheden Actief deelnemen aan dentwikkeling van software components in .NET (Framework en Core); Ontwerpen van schaalbare en onderhoudbare oplossingen en samenwerking met de architectuurteam; Technical coaching involves a team led by an excellent culture; Use code reviews and find out about best practices; Analyze the functions being performed and analyzed in technical operation; Zorgen voor de kwaliteit, services, beveiliging en onderhoudbaarheid van toepassingen; Optimize your system requirements; Evaluate the integration of new technologies that pass through bedrijfsdoelstellingen. Gedragsvaardigheden Kritische informatieanalyse en integratie; Gestructureerd en oplossingsgericht denken; Creatief in het bedenken van alternatieven en het trekken van juiste conclusions; Technisch leiderschap en samenwerking; Verkracht en aanpassingsvermogen aan technische de contextuele veranderingen. We have found an interesting role in ICT and Data services that has a significant impact on the subject, but you can do it privately; Flexible working hours of 40 hours per week (7.30 to 20.00 and extended periods from 9.00 to 12.00 to 13.00 to 16.00); De mogelijkheid tot telewerken; Werkplekken georganiseerd volgens activiteiten; Goedeikbaarheid met het openbaar vervoer; Parking for your car’s bike in the park; Individual kluis

Required Skills

ASP.NET Core Web API, Authentication/Authorization (JWT, OIDC, claims), Blazor, C# / .NET (Core, 10), Entity Framework Core, MVC, REST API’s, REST, Swagger/OpenAPI, SQL Server, Testing (unit + integration)

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