Senior Principal Software Engineer

Title: Senior Principal Software Engineer At KBR, we deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 85 countries and operations in over 28 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results. Trinzic is the future independent company to be created through the planned spin-off of KBR's Mission Technology Solutions business, expected in January 2027. Our people work at the frontier of what is possible, delivering solutions in challenging environments and advancing some of the world's highest-priority national security and space missions. Backed by decades of mission success, deep expertise, and trusted partnerships, Trinzic will launch as a global organization with more than 18,000 employees supporting customers around the world. Join us at a defining moment and help shape the future of a company built to tackle complex challenges and make a meaningful impact. Candidates who join KBR's Mission Technology Solutions business before the spin-off will transition to Trinzic when the separation is complete and will not need to reapply for employment. The Senior Principal Software Engineer / Solutions Architect will serve as a technical leader responsible for architecting, developing, integrating, modernizing, and supporting enterprise software platforms. The ideal candidate will possess extensive experience with Adobe ColdFusion-based enterprise systems and a proven track record leading modernization efforts to scalable, cloud-native architectures utilizing AWS and modern development frameworks. The role requires deep expertise in software architecture, data-intensive applications, systems integration, and legacy platform transformation. This individual will partner with program leadership, customers, architects, and engineering teams to develop innovative solutions that improve mission effectiveness, operational efficiency, and long-term maintainability. Key Responsibilities Lead modernization efforts transitioning legacy ColdFusion applications to modern architectures utilizing .NET, Node.js, cloud-native services, and contemporary web frameworks.Analyze, maintain, and enhance existing ColdFusion applications while developing migration strategies that improve scalability, maintainability, security, and performance.Develop and execute technical roadmaps for legacy application transformation and cloud adoption initiatives.Design scalable, secure, and highly available cloud architectures utilizing AWS services including S3, SQS, RDS, Lambda, API Gateway, EC2, and related technologies.Architect and develop REST APIs, service-oriented solutions, and enterprise integration frameworks.Lead modernization initiatives transitioning legacy applications to modern web and cloud-based architectures.Design and optimize large-scale relational database environments including Oracle, SQL Server, PostgreSQL, and MySQL.Develop distributed processing, asynchronous workflows, event-driven systems, and high-volume data pipelines.Analyze application performance and implement architectural improvements to enhance scalability, reliability, and maintainability.Lead technical design reviews, code reviews, technology evaluations, and engineering governance activities.Mentor software engineers and foster engineering excellence across development teams.Collaborate with stakeholders to translate complex business and mission requirements into technical solutions.Evaluate AI-assisted development tools and automation technologies to improve delivery speed and software quality. Required Qualifications Bachelor's degree in Computer Science, Information Systems, Software Engineering, or related field.15+ years of professional software engineering experience.5+ years of hands-on Adobe ColdFusion development, administration, and modernization experience.Demonstrated experience modernizing and migrating legacy ColdFusion applications to modern platforms, frameworks, and cloud-based architectures.Strong experience developing enterprise web applications using ColdFusion, .NET, JavaScript, TypeScript, Node.js, or comparable technologies.Experience designing and supporting large-scale SaaS and enterprise software platforms.Strong experience with cloud-native application development and AWS services.Deep understanding of distributed system <![CDATA[Senior Principal Software Engineer Required Qualifications Bachelor's degree in Computer Science, Information Systems, Software Engineering, or related field.15+ years of professional software engineering experience.5+ years of hands-on Adobe ColdFusion development, administration, and modernization experience.Demonstrated experience modernizing and migrating legacy ColdFusion applications to modern platforms, frameworks, and cloud-based architectures.Strong experience developing enterprise web applications using ColdFusion, .NET, JavaScript, TypeScript, Node.js, or comparable technologies.Experience designing and supporting large-scale SaaS and enterprise software platforms.Strong experience with cloud-native application development and AWS services.Deep understanding of distributed systems, asynchronous processing, and microservices architectures.Extensive experience with REST APIs and enterprise integrations.Strong database design and performance optimization experience.Proven experience mentoring engineers and leading technical teams.Ability to obtain and maintain a Secret Security Clearance. Required Technical Skills Legacy Modernization & ColdFusion Adobe ColdFusionColdFusion Components (CFCs)ColdFusion Performance TuningLegacy Platform ModernizationColdFusion-to-.NET Migration Cloud & Infrastructure AWS (S3, SQS, Lambda, API Gateway, RDS, EC2, FSx)Cloud-Native ArchitectureCI/CD PipelinesInfrastructure Automation Languages & Frameworks C#.NETJavaScriptTypeScriptNode.jsReactAngularVue.js Data Technologies OracleSQL ServerPostgreSQLMySQLPL/SQLDatabase Performance TuningData Modeling Integration & Architecture REST APIsEnterprise IntegrationsService-Oriented ArchitectureEvent-Driven ArchitectureDistributed SystemsMicroservicesSoftware Design Patterns Development Tools GitHubJenkinsJiraGitHub CopilotAI-Assisted Development Tools All skills above align with demonstrated experience supporting enterprise SaaS platforms, cloud modernization, large-scale databases, integrations, and software architecture. Preferred Qualifications Experience modernizing large-scale ColdFusion applications supporting government, logistics, procurement, sustainment, or financial management operations.Experience leading enterprise migration initiatives from Adobe ColdFusion to .NET, Node.js, or cloud-native architectures.Experience establishing modernization roadmaps and migration strategies for mission-critical legacy systems.Experience supporting applications requiring 99.9%+ availability and high operational reliability.Experience implementing AI-enabled engineering workflows and automation solutions.Master's degree in a related technical discipline. Desired Competencies Enterprise Software ArchitectureTechnical LeadershipCloud Strategy & ModernizationSystems IntegrationSaaS Platform EngineeringData Architecture & OptimizationDistributed Systems DesignApplication Performance EngineeringTeam Mentoring & DevelopmentStrategic Problem SolvingStakeholder CommunicationAgile Program Delivery Belong, Connect and Grow at KBR At KBR, we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to, and ongoing journey toward being a People First company. That commitment is central to our team of team’s philosophy and fosters an environment where everyone can Belong, Connect and Grow. We Deliver – Together. KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law. R3000591