Full Stack Software Engineer

P3S CORPORATION is seeking a Full Stack Software Engineer to build and improve secure, scalable applications for federal government customers. This onsite role in San Antonio, TX is hands-on across the full stack, with a focus on reliable backend services, RESTful APIs, and responsive front-end experiences.

What you’ll do

• Design, develop, test, and maintain scalable web applications across the full technology stack.
• Develop and optimize backend services using Java, emphasizing secure, efficient, high-performance data processing.
• Build, integrate, consume, and maintain RESTful APIs to support reliable communication between applications and services.
• Create responsive, accessible, user-focused front-end solutions using JavaScript and modern front-end frameworks.
• Collaborate with engineers, product stakeholders, designers, and other team members to translate business and mission requirements into effective technical solutions.
• Diagnose and resolve application and system issues across the technology stack.
• Identify opportunities to improve performance, reliability, scalability, and maintainability.
• Apply sound software development practices throughout the development lifecycle.
• Take ownership of assigned development efforts and contribute to timely delivery of secure, high-quality software.
• Participate in technical discussions, code reviews, testing, troubleshooting, and continuous improvement initiatives.

What you bring

• Active Secret security clearance is required.
• Active Top Secret clearance or higher is preferred.
• Minimum of 3 years of relevant professional experience.
• Experience with Java and JavaScript.
• Hands-on work with modern front-end frameworks such as React, Angular, or Vue.js.
• Hands-on use of Ansible.
• Experience developing, building, consuming, integrating, and/or securing RESTful APIs.
• Working knowledge of SQL and/or NoSQL databases including PostgreSQL, MySQL, MongoDB, Elasticsearch, and Node.js.
• Familiarity with modern software development practices and application development lifecycles.
• Experience with code-assist or AI-enabled development tools such as GitHub Copilot, Gemini Code Assist, Amazon CodeWhisperer, or comparable tools.
• Ability to maintain all required security and customer eligibility requirements associated with the position.

Technologies you may work with

• Backend and APIs: Java, RESTful APIs, Node.js
• Front end: JavaScript, React, Angular, Vue.js
• Data: PostgreSQL, MySQL, MongoDB, Elasticsearch
• Automation and environments: Ansible, Docker and/or Podman, Linux
• Cloud: AWS, Microsoft Azure, Google Cloud Platform
• Distributed data ecosystem: Apache Spark, Accumulo, Hadoop, Zookeeper, YARN
• Security/credential areas: Security+, CISSP, CASP+

Preferred qualifications

• Experience with Docker and/or Podman.
• Experience working in Linux environments.
• Experience with AWS, Microsoft Azure, or Google Cloud Platform.
• Experience with Apache Spark and distributed data processing.
• Experience with Accumulo, Hadoop, Zookeeper, YARN, or comparable data-ecosystem technologies.
• Experience developing within federal government or Department of Defense environments.
• DoD 8140-aligned certifications such as Security+, CISSP, CASP+, or similar cybersecurity credentials.

Clearance requirements

• Active Secret security clearance is required.
• Active Top Secret clearance or higher is preferred.
• Candidates must maintain all required security and customer eligibility requirements associated with the position.

What P3S values in this role

• Strong analytical and problem-solving skills.
• Commitment to secure and maintainable software development.
• Attention to quality and technical detail.
• Ability to work effectively within collaborative, multidisciplinary teams.
• Strong communication skills.
• Accountability and ownership of assigned responsibilities.
• Ability to adapt to evolving customer, technical, and mission requirements.
• Commitment to continuous learning and professional development.