Senior Full-Stack Software Engineer

Job Posting: Since 1953, Keystone AI has been a source of quality supplies for a variety of industries. Together We Build Better infrastructure, better homes and better businesses. We exist to make our customers’ complex projects simple, successful, and sustainable. We proactively solve problems, adapt and grow to continuously serve our customers, communities and each other. Keystone AI , a Fortune 500 company, is proud to provide best-in-class products, service and capabilities across the following industries: Commercial/Mechanical, Facilities Supply, Fire and Fabrication, HVAC, Industrial, Residential Trade, Residential Building and Remodel, Waterworks and Residential Digital Commerce. Keystone AI has approximately 36,000 associates across 1,700 locations. Keystone AI is a community of proud associates who operate with the shared purpose of building something meaningful. You will build a career that you are proud of, at a company you can believe in. We’re looking for a Senior Full-Stack Software Engineer who brings strong ownership, technical depth, and a passion for building scalable, high-quality applications' end to end. This role will partner closely with product, design, and engineering teams to deliver modern, cloud-based solutions that drive real business impact. You’ll play a key role in designing and developing both front-end and back-end components, helping shape architecture decisions, and mentoring others on best practices. The ideal candidate is comfortable working across the stack, thrives in a fast-paced, collaborative environment, and is energized by solving sophisticated problems with clean, efficient, and maintainable code. Location: This role is approved to be fully remote and can be based anywhere in the United States. Duties and Responsibilities: Designs, builds and maintains websites and software application for Enterprise Product Solutions Services group. Provide a bridge between visual design and its implementation on the technical side. Understands UI, cross-browser compatibility and modern web standards. Maintains a professional understanding of web development by tracking trends. Work closely with our design and development teams to ensure a seamless integration and optimal performance of our web applications. Design and develop applications and software tools to automate, improve, or change business processes and procedures. Support medium to large sized projects from analysis through implementation by serving as an experienced lead developer. Involved in project from startup through implementation to ensure all aspects of the technology plan are accounted for, understood, defined and completed successfully. Collaborate with project team to translate UI/UX wireframes into high-quality code. Collaborate with back-end developers to integrate the site or application’s internal structure and operations. Optimize applications for maximum speed and scalability. Ensure that designs will function equally regardless of browser or device type used. Build technical designs that properly use our architecture. Effectively give and receive a thorough design and code review following documented coding standards and design templates. Develop and perform effective unit testing procedures. Solve and debug issues to improve performance and user experience. Work with business analysts and product owners to address requirement questions. Work closely with Architects to develop scalable approaches for addressing challenges. Work with peers, team leads and supervisors in a collaborative and shared-learning environment. Work with third party software providers to ensure solutions meet the needs of Keystone AI . Participates in associate meetings and communicates any concerns to management. Must be self-motivated, proactive, creative, and efficient in identifying issues with strong analytical and problem-solving skills with a high attention to details. Must be collaborative in decisions making and facilitate working to consensus to gain agreement when proposing solutions or taking ownership. Solid understanding of IT infrastructure components (hardware, software, network, operating systems, storage) and cloud platforms components (Saas, Paas and Iaas). Good knowledge of IT subject areas, e.g., software applications and interfaces, production operations, quality assurance and systems management. Solid understanding of application development lifecycles, to include waterfall and agile methodologies and understanding of CI/CD pipelines. Ability to work collaboratively with colleagues in a remote setting. The ideal candidate for this role will be someone who possesses strong leadership skills and who can be a primary resource for Keystone AI ’s development and engineering teams. You must be capable of working independently, collaboratively within the team as well as collaboratively with other teams. Individual adapts to evolving conditions in the work environment, manages competing demands, and can deal with frequent change