Full Stack Software Engineer (React/.Net)

PURPOSE We are Builders FirstSource, America’s largest supplier of building materials, value-added components, and building services to the professional market. You’ll feel proud of the work you do here every day to transform the future of home building and help make the dream of home ownership more achievable. The Senior Full Stack Engineer will play a key role in designing, developing, and supporting enterprise applications that enable critical business capabilities across Builders FirstSource. This position participates in all phases of the Software Development Life Cycle (SDLC), including solution design, development, testing, deployment, monitoring, and ongoing support. The role serves as a senior technical contributor, providing architecture guidance, mentoring engineers, promoting engineering best practices, and delivering scalable, secure, and maintainable software solutions. Primary technologies include .NET / ASP.NET Core, React, REST APIs, Azure cloud services, SQL Server, and modern DevOps practices, with strategic adoption of Next.js and modern front-end architecture patterns. ESSENTIAL DUTIES AND RESPONSIBILITIES Design, develop, test, deploy, and support enterprise-scale web applications and services. Build and maintain full-stack solutions using .NET, ASP.NET Core, React, SQL Server, and Azure cloud technologies. Lead technical design and architectural decisions for complex features and initiatives. Partner with Product Managers, Business Analysts, Architects, UX Designers, QA Engineers, and business stakeholders to deliver business value. Analyze business requirements and translate them into scalable technical solutions. Develop and maintain RESTful APIs, service integrations, and distributed application components. Create reusable, maintainable, and high-quality front-end components and user experiences. Implement automated testing strategies, code quality standards, and secure coding practices. Perform code reviews and provide technical mentorship to engineers across the team. Identify and resolve performance, reliability, scalability, and security concerns. Contribute to cloud-native application development and modernization initiatives. Participate in CI/CD implementation, deployment automation, and DevOps best practices. Support application monitoring, observability, troubleshooting, and production issue resolution. Collaborate with cross-functional teams to improve software engineering standards, development processes, and Agile delivery practices. Evaluate emerging technologies and recommend solutions that improve efficiency, maintainability, and business outcomes. Contribute to the adoption of Next.js and modern front-end architectural approaches as part of the platform roadmap. SUPERVISORY RESPONSIBILITIES This job has no direct supervisory responsibilities. The position provides technical leadership, mentoring, and guidance through influence and expertise. MINIMUM REQUIREMENTS To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. Bachelor’s degree from an accredited college/university or equivalent experience. 7+ years of professional software engineering experience. Extensive experience developing full-stack applications using C# and .NET technologies. Strong experience with ASP.NET Core and REST API development. Strong experience building modern single-page applications using React. Understanding of Next.js concepts and modern front-end development patterns preferred. Strong understanding of object-oriented design principles and software architecture. Experience implementing design patterns, dependency injection, and scalable application architectures. Strong SQL Server experience including T-SQL development, performance tuning, stored procedures, views, and indexing strategies. Experience with Azure cloud services and cloud-native application development. Experience with source control systems such as Git. Familiarity with Azure DevOps, CI/CD pipelines, and Agile development practices. Experience with automated testing frameworks and quality assurance practices. Knowledge of application security principles and remediation of vulnerabilities. Experience with container technologies, microservices, and distributed systems is preferred. Strong analytical, problem-solving, communication, and collaboration skills. COMPETENCIES Evaluates Problems: Analyzes complex technical and business challenges and develops effective solutions. Technical Communication and Presentation: Clearly communicates technical concepts to both technical and non-technical audiences. Adjusting and Driving Change: Embraces innovation and drives continuous improvement. Focuses on Customers: Develops solutions that improve customer and business outcomes. Demonstrates Business Acumen: Understands how technology decisions support business objectives. Agile Best Practices: Applies Agile principles and engineering excellence throughout the delivery lifecycle. Bias for Action: Demonstrates ownership, urgency, and accountability. Technical Leadership: Influences engineering direction through expertise, collaboration, mentoring, and code quality. Continuous Learning: Actively evaluates emerging technologies and expands technical knowledge. BFS COMPETENCIES Business and Financial Acumen Results Driven Strategic Thinking and Decision Making Servant Leadership Emotional Intelligence Develops and Leads Others through mentoring and knowledge sharing Growth Mindset Innovation Integrity WORK ENVIRONMENT / PHYSICAL ACTIVITY The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Subject to both typical office environment and outside locations with temperature and weather variations. Must be able to lift and carry up to 25 pounds. Occasional travel may be required.