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# Software Engineer

- **Company:** Cornerstone Defense
- **Location:** Chantilly, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Java (Programming Language), Agile Methodology, Amazon Web Services, Amazon Elastic Compute Cloud, Code Review, Continuous Integration, Data Transmissions, Linux, Data Intelligence, Python (Programming Language), Queueing Systems, Ansible, Software Engineering, Software Systems, Data Streaming, S3 Bucket, DevOps Tools - Open-source, Git, Apache Kafka, Apache Nifi, Puppet, Amazon Simple Queue Service (SQS), Terraform, Stream Processing, Jenkins
- **Published:** October 27, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9264665/software-engineer

## About the Role

* Active TS/SCI security clearance with relevant polygraph.
 * Minimum of 12 years of software development experience with a BS/BA degree or at least 10 years of experience with an MS/MA degree.
 * At least 4 years of Java or Python experience.
 * Demonstrated experience working in a Linux environment.
 * Proven expertise in AWS development, including knowledge of S3 buckets and EC2 instances.
 * Experience working within Agile development methodologies.

Desired Qualifications:

 * Experience with Apache NiFi, especially in data flow management and integration.
 * Familiarity with DevSecOps tools such as Git, Jenkins, Puppet, Chef, Ansible, Terraform, etc.
 * Experience with AWS SQS and Apache Kafka for message queuing and stream processing.

## Description

As a Senior Software Engineer, you will play a key role in designing, developing, testing, and deploying new features for a critical data transmission application that directly supports the US intelligence community. You will collaborate with a small, highly skilled team to build a robust, secure system that serves as the interface between multiple enterprise networks. This application plays a vital role in transmitting critical intelligence data from field sources to downstream systems. Your contributions will be instrumental as the application evolves into the central hub for all NiFi channels., * Design, develop, and implement new features for a data transmission application using Java and Apache NiFi.

 * Collaborate with cross-functional engineering teams to integrate the application with multiple enterprise networks, ensuring secure and efficient data flow.
 * Contribute to the technical roadmap, advancing the application into the central transmission hub for NiFi channels supporting the US intelligence community.
 * Provide mentorship to junior engineers and foster a collaborative, high-performance team environment.
 * Ensure high-quality code by adhering to best practices for testing, continuous integration, and code reviews.

Work within Agile development frameworks to iterate and deliver software solutions that meet mission-critical objectives.