Sr. Software Engineer

Description We are looking for a Senior Software Engineer to join a Financial Services team in Appleton, Wisconsin. This Long-term Contract position is suited for a senior full stack developer who enjoys building engaging digital experiences and reliable backend services in a high-quality enterprise setting. The role focuses on delivering customer- and advisor-facing solutions across modern web applications while partnering closely with product, design, and engineering stakeholders.

Responsibilities:

• Deliver complete features across the full stack, from React-based interfaces to Java and Spring Boot services, ensuring solutions are production-ready.
• Create and enhance APIs and connected service integrations that support secure, scalable application functionality.
• Build intuitive user interface elements that follow established design standards, usability expectations, and accessibility guidelines.
• Work closely with cross-functional teammates in iterative sprint cycles to refine requirements, implement solutions, and meet delivery goals.
• Strengthen software quality through automated test coverage, continuous integration and deployment practices, and consistent engineering standards.
• Improve application health by advancing monitoring, logging, performance tuning, and overall platform reliability.
• Review code collaboratively and contribute ideas that improve maintainability, technical quality, and team delivery practices. Requirements
• At least 7 years of software engineering experience with recent ownership of full stack application delivery.
• Strong hands-on expertise with React.js and modern JavaScript or TypeScript development.
• Solid backend development experience using Java and Spring Boot in enterprise environments.
• Proven ability to move work from business requirements through deployment with minimal day-to-day supervision.
• Experience building reusable component-based front-end architectures and managing application state effectively.
• Familiarity with automated testing practices for front-end and back-end applications.
• Experience working with API integrations and event-driven or distributed systems, including technologies such as Apache Kafka.

Technology Doesn't Change the World, People Do.® Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles. Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app (https://www.roberthalf.com/us/en/mobile-app) and get 1-tap apply, notifications of AI-matched jobs, and much more. All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information. © 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "," you're agreeing to Robert Half's Terms of Use (https://www.roberthalf.com/us/en/terms) and Privacy Notice (https://www.roberthalf.com/us/en/privacy) .