Principal Java Software Developer 20+yrs Cleared TS/SCI Polygraph Reqd

Nissint Technologies, LLC; Maryland; On-site; USD 180,000 - 240,000; Full time

Job summary

Nissint Technologies, LLC in Maryland is seeking a Principal Software Engineer with an active TS/SCI clearance with Polygraph to join a distributed, microservices-based full-stack application.

The role focuses on backend services built with Java and Spring Boot and frontend interfaces using Angular. You will implement RESTful APIs, troubleshoot distributed systems, and collaborate with mission analysts and other developers to deliver reliable software capabilities.

Qualifications

• Active TS/SCI clearance with Polygraph.
• 20+ years of software engineering experience.
• Bachelor's degree required, or +4 years of substitution for degree.

Responsibilities

• Develop and maintain features for a distributed full-stack application.
• Implement RESTful APIs and integrate services across microservices.
• Collaborate with mission analysts and developers to deliver timely, reliable software.

Skills

Java

Spring/Spring Boot

REST API development

Angular 14+/TypeScript

Microservices

Education

Bachelor's degree

Tools

Docker

Kubernetes

AWS

Jira

GitLab CI

MongoDB

Elasticsearch

Maven

SSH

Job description

Job Description

This position requires an active TS/SCI clearance with Polygraph. Please do not apply if you do not already have such a clearance.

• Principal Software Engineer
• 20+ Years of Experience
• Bachelors Degree required, or +4 years to substitute

Job Description:

This position is part of a software engineering team responsible for developing new features and maintaining existing functionality for a full-stack application that supports an analysis-focused mission. The application is distributed across multiple nodes and leverages a microservice architecture to ensure scalability and resilience. The team works across the entire technology stack—from backend services built with Java and Spring Boot, to modern web interfaces developed in Angular. Day-to-day responsibilities include implementing RESTful APIs, integrating services, troubleshooting distributed system issues, and collaborating closely with mission analysts and other developers to deliver timely, reliable software capabilities. The work is dynamic and mission-critical, requiring regular coordination, continuous improvement, and adaptation to evolving requirements.

Required Skills:

• Java
• Spring / Spring Boot
• REST API development
• Web Development in Angular 14+, JavaScript, TypeScript
• A thorough understanding of microservice architecture is a must

Desired Skills:

• Artifactory
• AWS Instances
• AWS Route 53
• Bash scripting
• Confluence
• docker-compose
• Docker
• Elastic search
• Kibanna
• Gitlab CI
• Jira
• Lambda (java)
• Maven
• MongoDB
• RSocket
• Reactor Project
• Spring data
• SSH

Company Description

Nissint Technologies is a Woman-Owned Small Business (WOSB) founded in 2006, specializing in providing tailored technology solutions. Our leadership team, with backgrounds in the Intelligence Community, has assembled a group of elite developers with expertise in various areas, including Digital Signal Processing, Enterprise Applications, User Experience and Interfaces, Big Data and Cloud Analytics, and Cyber Capabilities.

Nissint's philosophy is to attract top talent by offering excellent compensation, rewarding work, and growth opportunities. We operate on four core principles: holistic expertise, collaborative learning, energetic advancement, and perpetual optimization

Company Description

Nissint Technologies is a Woman-Owned Small Business (WOSB) founded in 2006, specializing in providing tailored technology solutions. Our leadership team, with backgrounds in the Intelligence Community, has assembled a group of elite developers with expertise in various areas, including Digital Signal Processing, Enterprise Applications, User Experience and Interfaces, Big Data and Cloud Analytics, and Cyber Capabilities.

Nissint's philosophy is to attract top talent by offering excellent compensation, rewarding work, and growth opportunities. We operate on four core principles: holistic expertise, collaborative learning, energetic advancement, and perpetual optimization