Backend Developer Jobs in Wisconsin, United States

Backend Development Team at Data Dimensions builds high‑volume, data‑centric services for imaging and workflow solutions. The Senior Backend PHP Developer designs and implements REST APIs, optimizes complex MySQL and MongoDB queries, and leads code reviews while collaborating with cross‑functional engineers and SQA. Janesville, WI office, hybrid schedule with on‑site collaboration days, relocation assistance available.

FIS is a leading fintech company seeking a Senior Backend Engineer to lead Java and Spring Boot–based services, APIs, and integrations across multiple U.S. locations. The role blends hands‑on development with technical leadership, driving design, code quality, and AI‑assisted engineering practices.

Backend Software Engineer II at U.S. Venture, Inc. builds moderately complex backend features and services using .NET Core, C#, and REST APIs, focusing on integrations and microservices. The role owns small modules, participates in design discussions, mentors junior engineers, and ensures maintainable, testable code.

FIS is a leading fintech company powering the global economy. We seek a Backend Software Engineer II to join our hybrid team across Chicago, Atlanta, Jacksonville, and Milwaukee.

FIS is a leading fintech company powering the world’s economy. We’re seeking a Backend Software Engineer II to join our hybrid team across Chicago, Milwaukee, and Jacksonville.

We are FIS. Our technology powers the world’s economy and our teams bring innovation to life. This hybrid (3 days onsite) role in Chicago, Milwaukee, Atlanta, and Jacksonville requires a Senior Backend Software Engineer to lead technical design, provide high‑level estimates, prioritize features versus technical debt, and mentor engineers.

Senior Backend Engineer at FIS responsible for designing, developing, and maintaining scalable backend services in a hybrid environment across Chicago, Atlanta, Jacksonville, and Milwaukee. Lead high‑quality software delivery, mentor junior engineers, and collaborate with product, UX, and QA teams.

FIS fintech role for Backend Engineer II. Hybrid 3 days onsite in Chicago, Milwaukee, Jacksonville. Lead high-quality software, mentor juniors, full-stack dev with Java, JavaScript, TypeScript, RESTful APIs, microservices, event-driven architecture.

Engineering team at EnsoData builds AI-powered healthcare platforms. The Backend Software Engineer owns core backend infrastructure, designs, develops, tests, deploys and maintains APIs and data pipelines for the EnsoSleep application, ensuring scalability, security and regulatory compliance.

Corporate division at U.S. Venture builds backend services with a focus on data migration. The Backend Software Engineer II designs and implements moderately complex .NET Core APIs, owns small modules, participates in technical design discussions, and mentors junior engineers.

Backend Software Engineer (hybrid) at Johnson Controls will design, build, and maintain backend services, APIs, and data pipelines for building automation and digital products. Working with product managers, frontend engineers, QA, and cross-functional teams, the role focuses on scalable, secure, and high-performance backend systems, microservices, and RESTful APIs.

Backend Capability team at CVS Health drives the backend platform, API ecosystem, and third‑party integration layer for its SaaS health suite. The role defines API standards, steers a scalable event‑driven microservices architecture, and leads integration strategy with EHR/EMR systems and emerging AI model APIs.

Senior Backend Software Engineer at U.S. Venture, Inc. leads the design and implementation of backend subsystems, ensuring scalability, performance, and security. The role mentors engineers, drives best practices, and modernizes technical debt.

We are FIS, a global fintech leader powering the world’s economy. As a Backend Software Engineer II, you will join a hybrid team across Chicago, Milwaukee, and Jacksonville, working 3 days onsite.

Pharmacy Technician - Backend at CVS Health's Omnicare division. Responsible for medication order fulfillment, packaging, dispensing, inventory, and stock rotation in closed-door pharmacy.

Senior Backend Engineer on Zendesk’s Connectors & Discover team, building robust data pipelines and AI-powered insights that transform support data into actionable automation recommendations. Day‑to‑day duties include designing ETL connectors, scaling the Discover insights engine, and maintaining resilient data pipelines and search indices at scale.

Platform Engineering at U.S. Bank builds best‑in‑class software experiences for financial services. The Software Engineer designs, develops, tests, and maintains backend AI‑powered services, writes production‑ready code, conducts code reviews, and embeds reliability, security, and AI capabilities into cloud‑native applications.

Innovation/R&D team at Sargento develops and commercializes new food products, focusing on flavor, texture, and nutritional improvements. The Product Development Scientist applies scientific principles to formulate, test, and scale products, while the Senior role leads complex projects and cross‑functional teams.

SC JOHNSON IS A FIFTH-GENERATION FAMILY COMPANY BUILT ON THE SPIRIT OF OUR PEOPLE. We have been leading with purpose for over 130 years, building iconic brands that win the hearts and minds of consumers – such as Raid®, Glade®, Ziploc® and more, in virtually every country around the world.

CVS Digital Developer Experience builds the tools and services that enable tens of thousands of developers across CVS Health, covering source control, CI/CD, artifact repositories, dev environments, and AI‑powered coding assistance. The Senior Software Development Engineer leads automation of delivery pipelines, incident remediation, and platform reliability while mentoring engineers.