We are seeking an experienced Senior .NET Full Stack Developer for a 12-month contract role based in Livingston, New Jersey. You will join a development team focused on modernizing business-critical applications within a financial services environment, with approximately 75% of your time spent on backend development and 25% on frontend work.
This is not a heads-down coding position. You will be expected to think critically about requirements, evaluate different technical approaches, and make thoughtful development decisions based on both immediate needs and longer-term application impact. The environment increasingly utilizes AI-assisted development tools, making the ability to understand, evaluate, and defend technical decisions essential.
Responsibilities
- Design, develop, enhance, and modernize enterprise applications using .NET Core, SQL, and React (Angular considered).
- Allocate approximately 75% of development time to backend systems and 25% to frontend application development.
- Participate in modernization efforts involving existing applications, services, and business processes.
- Analyze business requirements and translate them into effective, maintainable technical solutions.
- Develop a strong understanding of the business processes and rules supported by the applications.
- Evaluate multiple potential approaches to development challenges and select solutions based on scalability, maintainability, performance, and business impact.
- Write efficient SQL queries and work extensively with relational databases and data-driven applications.
- Develop and enhance user-facing functionality using React.
- Review existing code and application architecture to identify opportunities for modernization and improvement.
- Troubleshoot complex application and data issues by identifying root causes rather than simply addressing symptoms.
- Collaborate closely with developers, QA resources, product stakeholders, and business partners.
- Participate in code reviews and technical discussions, clearly explaining development decisions and potential tradeoffs.
- Effectively leverage modern development tools, including AI-assisted development, while maintaining ownership and understanding of the resulting code.
Qualifications
Required
- Strong professional development experience with .NET Core and C#.
- In-depth SQL skills and experience working with relational databases, including demonstrated expertise in performance tuning and joins.
- Experience developing modern web applications with React or Angular.
- Strong backend application development experience, including business logic and data-intensive applications.
- Demonstrated ability to analyze complex requirements and understand the business purpose behind application functionality.
- Strong troubleshooting and root-cause analysis skills.
- Ability to articulate why a particular technical approach was selected, what alternatives were considered, and the potential consequences of taking a different approach.
- Experience working with existing or legacy applications and participating in application modernization initiatives.
- Strong understanding of software development principles, application architecture, and maintainable coding practices.
- Strong verbal and written communication skills with the ability to participate effectively in detailed technical discussions.
Preferred
- Experience within financial services, retirement services, benefits, payroll, investment, or other transaction-oriented environments.
- Experience modernizing legacy enterprise applications into newer .NET and web-based architectures.
- Experience working on systems involving complex business rules, calculations, financial transactions, or large datasets.
- Familiarity with AI-assisted software development tools and practices.