> Markdown version of [/jobs/ext/1720371-software-engineer-ts-sci-with-poly-required](https://www.wearedevelopers.com/jobs/ext/1720371-software-engineer-ts-sci-with-poly-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer (TS/SCI with Poly Required) - **Company:** GCI, Inc. - **Location:** Chantilly, VA, United States - **Experience:** Expert - **Salary:** $142,792.0 - $238,451.0 - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Amazon Elastic Compute Cloud, Amazon S3, Unit Testing, Big Data, Software as a Service, Software Debugging, Elasticsearch, Identity and Access Management, Python (Programming Language), Object-Oriented Software Development, Raw Data, Software Tools, Cloud Services, Software Engineering, Software Systems, S3 Bucket, Data Ingestion, Database Optimization, Software Application Programming, Amazon Virtual Private Cloud (VPC), Git, Data Layers, Information Technology, Data Analytics, Data Management, Api Design, Terraform, Cyber Warfare - **Published:** July 1, 2026 - **Apply:** https://www.clearancejobs.com/jobs/8990780/software-engineer-tssci-with-poly-required ## About the Role The Software Engineer will design, develop, code, test, and debug complex software products to be deployed in a mission critical environment. The ideal candidate is a hands-on developer with significant experience in scalable data platforms, cloud-based services, and big data analytics, and OpenSearch or Elasticsearch. They must have strong, firsthand technical expertise in a variety of data ingestion/computation technologies and the proven ability to fashion robust scalable solutions that can manage large data sets. They must be at ease working in an agile environment with a cross-functional team. This person should embody a passion for innovation and continuous improvement., * Bachelor's degree in Computer Science, Information Technology, or other related technical discipline, or equivalent combination of education, technical certifications, training, and work/military experience., * Demonstrated hands-on experience with Python, Git, and unit testing frameworks. * Demonstrated hands-on experience with building APIs and services using REST. * Demonstrated hands-on experience with OpenSearch or Elasticsearch. * Demonstrated hands-on experience with AWS CDK 1 and/or 2 or Terraform. * Demonstrated hands-on experience applying object-oriented design principles and patterns to architect scalable, maintainable, and testable software systems in production environments. * Demonstrated hands-on experience designing and developing applications using core AWS services, including EC2, S3, IAM, and VPC *A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance., Preferred Bachelor of Science or better in Computer Science or related field. Experience Required 10 years: Demonstrated work related experience. ## Description GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry. At GCI, we solve the hard problems. As a Software Engineer, a typical day will include the following duties, * Work with a team to write new cloud-based applications and tools and recommend new technologies and methodologies to improve system performance and usability. * Design, develop, test, debug, and deploy new software tools that extend or replace existing capabilities to parse raw data for analysis. * Collaborate cross-functionally with data scientists, analysts, project managers and other engineers and technical SMEs. * Deploy new software into an AWS-based data ingest pipeline. * Write software that interacts with multiple data types and stores data into S3 buckets that is queried by processes running Athena or OpenSearch. * As an OpenSearch expert, drive the design of indexing strategies, query optimizations, and maintain overall architectural ownership of the OpenSearch data layer. * Troubleshoot complex problems and provide support to mission areas for software systems and application issues. * Maintain good documentation for new software written and new procedures to be followed. * Provide recommendations for continuous improvement. * Work alongside other engineers on the team to sustain and advance our organization's capabilities. ## Related Videos - [Data Governance in the Era of AI](https://www.wearedevelopers.com/videos/1622-data-governance-in-the-era-of-ai) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [30 powerful AWS hacks in just 30 minutes: Boost your developer productivity](https://www.wearedevelopers.com/videos/1624-30-powerful-aws-hacks-in-just-30-minutes-boost-your-developer-productivity) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)