Software Engineer, Principal

About the role

In a world of possibilities, pursue one with endless opportunities. Imagine Next! At Parsons, you can imagine a career where you thrive, work with exceptional people, and be yourself. Guided by our leadership vision of valuing people, embracing agility, and fostering growth, we cultivate an innovative culture that empowers you to achieve your full potential. Unleash your talent and redefine what’s possible. Job Description Parsons is looking for a talented Principal Full Stack Software Engineer to provide technical leadership and architectural expertise to our growing team supporting a high-priority national security mission. In this role, you will lead the architecture, design, development, and integration of an advanced Signals Intelligence (SIGINT) data fusion and analytics platform. The platform integrates multiple intelligence data sources into a unified operational environment, leveraging modern data processing technologies, APIs, advanced data correlation and entity resolution, and advanced visualization capabilities to support intelligence analysis, vulnerability research, and collaborative mission planning. This position offers an opportunity to provide technical leadership on cutting-edge intelligence integration projects, establishing the technical direction and guiding the development of secure, scalable, and high-performance solutions that support critical national security missions.

Responsibilities

• You will be an integral part of our team solving challenging mission-focused problems to meet customer needs.
• You will provide technical leadership within an Agile team, establishing software architecture, guiding engineering decisions, and leading the development of well-designed, testable, and efficient software solutions.
• You will collaborate with team members in person or remotely, mentor engineers, engage directly with mission stakeholders, and champion innovative technical solutions to complex engineering challenges.
• Lead the architecture, design, development, and integration of full-stack software applications using Python, React, and TypeScript to integrate, process, and correlate structured and unstructured intelligence data through APIs and scalable backend services.
• Architect advanced data fusion and entity resolution capabilities, and guide the development of interactive dashboards, custom interfaces, and data visualization capabilities to support SIGINT analysis, vulnerability research, and collaborative mission workflows, while defining secure integration architectures and interfaces with external AI platforms.
• Provide technical leadership across the software development lifecycle, establishing engineering standards, guiding architectural decisions, mentoring software engineers, and collaborating with mission stakeholders and engineering teams to deliver secure, scalable, and reliable software solutions through Agile development practices, automated testing, and continuous integration.

Requirements

• Must be a U.S. citizenship and have eligibility for a TS/SCI security clearance
• Bachelor's Degree and a minimum of 10 years of related professional experience
• Extensive experience designing, architecting, and developing full-stack applications using Python and React/TypeScript, including demonstrated technical leadership of complex software development efforts
• Advanced experience architecting scalable backend services and RESTful APIs using frameworks such as FastAPI, Django, or equivalent technologies
• Experience leading the design and development of interactive user interfaces and dashboards using React and modern JavaScript/TypeScript frameworks
• Experience working with structured data formats such as JSON and XML and relational databases such as PostgreSQL, including the design of data models and database architectures supporting complex data integration and correlation
• Demonstr