Senior Principal Software Engineer

At K , we deliver science, technology and engineering solutions to governments and companies around the world. K  employs approximately 37,000 people worldwide with customers in more than 85 countries and operations in over 28 countries. K  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 K '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 K '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 Cold Fusion-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.

• Lead modernization efforts transitioning legacy Cold Fusion applications to modern architectures utilizing .NET, Node.js, cloud-native services, and contemporary web frameworks.
• Analyze, maintain, and enhance existing Cold Fusion 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.

• 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 Cold Fusion development, administration, and modernization experience.
• Demonstrated experience modernizing and migrating legacy Cold Fusion applications to modern platforms, frameworks, and cloud-based architectures.
• Strong experience developing enterprise web applications using Cold Fusion, .NET, JavaScript, Type Script, Node.js, or comparable technologies.
• Experience designing and supporting large-scale SaaS and enterprise software platforms.
• Strong experience with cloud-native application…