Principal Full-Stack Software Engineer

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. This position offers a hybrid work schedule** What You’ll Be Doing 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. What Required Skills You’ll Bring Must be a U.S. citizenship and have eligibility for a TS/SCI security clearanceBachelor's Degree and a minimum of 10 years of related professional experienceExtensive experience designing, architecting, and developing full-stack applications using Python and React/TypeScript, including demonstrated technical leadership of complex software development effortsAdvanced experience architecting scalable backend services and RESTful APIs using frameworks such as FastAPI, Django, or equivalent technologiesExperience leading the design and development of interactive user interfaces and dashboards using React and modern JavaScript/TypeScript frameworksExperience 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 correlationDemonstrated experience architecting data ingestion, parsing, transformation, normalization, correlation, and integration across multiple data sourcesExperience using Git, software debugging tools, and automated testing frameworks, including establishing software engineering standards, conducting technical design and code reviews, and guiding CI/CD implementationAdvanced experience with Linux development environments and containerization technologies such as Docker, including the design and deployment of scalable, distributed software applicationsStrong understanding of software architecture, system scalability, performance optimization, secure coding practices, and Agile development methodologiesDemonstrated ability to establish technical direction, evaluate architectural alternatives, and resolve complex engineering challenges involving system integration, performance, scalability, and data integrityStrong analytical and problem-solving skills and the ability to provide technical leadership to multidisciplinary technical teams, mentor software engineers, and effectively communicate architectural decisions and technical approaches to program leadership and mission stakeholders What Desired Skills You’ll Bring TS/SCI clearance is preferredExperience serving as a technical lead or software architect on programs supporting SIGINT, intelligence analysis, cyber operations, or other national security missionsFamiliarity with reverse engineering, vulnerability research, or cyber threat analysis, including the integration of these analytical capabilities into mission-oriented software platformsAdvanced experience architecting data fusion, entity resolution, record correlation, or graph-based data relationships across multiple disparate intelligence data sourcesExperience designing data architectures using graph databases, NoSQL databases, or modern data processing frameworks, including knowledge graph technologies and distributed data processing solutionsExperience developing data visualization interfaces using libraries such as D3.js, Plotly, or equivalent technologies, including the design of complex analytical dashboards and collaborative mission-oriented interfacesExperience working with unstructured data, including text extraction, metadata enrichment, and automated data classification, with an understanding of scalable data processing architectures and data quality managementExperience defining integration architectures for Artificial Intelligence and Machine Learning technologies, including Large Language Models (LLMs), agentic AI frameworks, and the exchange of fused intelligence data with external AI platforms through APIsExperience with Kubernetes, CI/CD pipelines, and automated software deployment, including establishing DevSecOps practices and guiding the implementation of secure, scalable software deployment architectures Strong understanding of cybersecurity best practices, secure software architecture, authentication, authorization, and secure API development Experience establishing technical approaches for data provenance, analytical traceability, correlation confidence, and validation of fused intelligence productsExperience developing system architecture documentation, interface specifications, technical roadmaps, and other engineering artifacts supporting complex software development and integration effortsundefined Security Clearance Requirement None This position is part of our Federal Solutions team. The Federal Solutions segment delivers resources to our US government customers that ensure the success of missions around the globe. Our intelligent employees drive the state of the art as they provide services and solutions in the areas of defense, security, intelligence, infrastructure, and environmental. We promote a culture of excellence and close-knit teams that take pride in delivering, protecting, and sustaining our nation's most critical assets, from Earth to cyberspace. Throughout the company, our people are anticipating what’s next to deliver the solutions our customers need now. Salary Range: $125,100.00 - $225,200.00 We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle! Parsons is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status or any other protected status. We truly invest and care about our employee’s wellbeing and provide endless growth opportunities as the sky is the limit, so aim for the stars! Imagine next and join the Parsons quest—APPLY TODAY! Parsons is aware of fraudulent recruitment practices. To learn more about recruitment fraud and how to report it, please refer to https://www.parsons.com/fraudulent-recruitment/.