Principal Software Engineer - Front-end Developer

RTX (Raytheon); San Jose (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Applied Signal Technology (AST) is seeking a Principal Software Engineer specializing in front-end development to join our San Jose team onsite. You will drive the design and implementation of software features across complex applications, collaborating with multi-disciplinary teams to deliver robust solutions that meet stringent defense requirements.

You will leverage Python, Java, and C++ in Linux environments, with strong emphasis on Angular, TypeScript, and related frontend technologies.

Qualifications

• Requires STEM degree and 8+ years of relevant experience.
• Proficient in Python, Java, and C++ in Linux environments.
• Strong front-end experience with Angular and TypeScript/JavaScript.

Responsibilities

• Contribute to requirements definition, design, development, and testing of software.
• Collaborate with project managers, engineers and cross-functional teams to deliver high-quality software.
• Follow processes for configuration management and maintainability of software products.
• Support DevOps improvements across the engineering environment.

Skills

Python

Java

C++

Linux

Education

STEM degree

Tools

Angular

TypeScript

JavaScript

DevExtreme

Cytoscape

Leaflet

Neo4j

PostgreSQL

InfluxDB

Job description

Location: US-CA-SAN JOSE-826 ~ 200 Holger Way ~ BLDG 826

Position Role Type: Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Security Clearance Type: TS/SCI with Polygraph

Security Clearance Status: Active and existing security clearance required after day 1

Raytheon Company managed by Collins Aerospace

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Applied Signal Technology (AST) is seeking a Principal Software Engineer with specialization in front-end development who strives for excellence and has passion to be part of a team that strengthens our nation and improves the security of our world.

AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST's work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenge our extraordinary engineers to resolve problems and make the world a safer place. AST's work environment is passionate, highly collaborative and provides engineers with the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation's finest service members all while embracing integrity, innovation, and work-life balance.

This is an ONSIT E position at the San Jose, CA location.

What You Will Do:

Key responsibilities include:

• Contribute to the requirements definition, design, development, and testing of software, including new features and enhancements to existing applications and systems.
• Collaborate closely with project managers, engineers, and cross‑functional teams to deliver high‑quality software capabilities.
• Follow established development practices and processes to ensure proper configuration management and maintainability of software products.
• Support the continual improvement of the software development environment, including DevOps practices, tools, and workflows within Engineering.

Travel: Up to 25% domestic to other AST sites and customer locations

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience.
• Extensive experience developing in modern programming languages such as Python, Java, or C++ within a Linux environment.
• Strong experience building complex web applications using the Angular framework and related technologies (TypeScript, JavaScript, DevExtreme, Cytoscape, Leaflet, etc.).
• Working knowledge and proficiency in integrating with back‑end server‑side technologies, including application servers and databases such as Neo4j, PostgreSQL, and InfluxDB, as well as RESTful or similar web services.
• Proficiency with common data formats such as JSON and XML.
• Ability to obtain and maintain a U.S. government issued Top Secret SCI (TS/SCI) security clearance.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer:

• Experience with microservices architecture, distributed systems, containerized deployments, and modern cloud technologies.
• Experience with RESTful APIs, messaging technologies such as Kafka or RabbitMQ, and event‑driven architectures.
• Experience with Agile/Scrum methodologies, DevOps practices, and test automation frameworks or tools.
• Proficiency with one or more scripting languages (Python, JavaScript, Bash, Perl, etc.).
• Experience using configuration management and defect‑tracking tools (e.g., Git, JIRA).
• Experience maintaining and working with complex build processes (e.g., Makefiles, CMake).
• Working knowledge of telecommunications systems concepts, computer network models, and protocol suites such as OSI, SS7, TCP/IP, and UMTS, including routing protocols (EIGRP, IS‑IS, OSPF, BGP).
• Familiarity with tel