> Markdown version of [/jobs/ext/2937434-mid-level-java-software-engineer-305k-yr-ts-sci-fs-poly](https://www.wearedevelopers.com/jobs/ext/2937434-mid-level-java-software-engineer-305k-yr-ts-sci-fs-poly). 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).

---

# Mid-Level Java Software Engineer [$305k/yr+] TS/SCI-FS Poly

- **Company:** SYSTOLIC, INC.
- **Location:** Annapolis Junction, MD, United States
- **Experience:** Experienced
- **Salary:** $305,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Databases, Data Structures, JSON, Python (Programming Language), Linux System Administration, MongoDB, Red Hat Enterprise Linux, Software Engineering, Extensible Markup Language (XML), Data Ingestion, System Availability, Backend, Git, Git Flow, Data Pipelines, Programming Languages
- **Published:** September 16, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9166574/mid-level-java-software-engineer-305kyr-tssci-fs-poly

## About the Role

* Degree: Technical bachelor's degree or equivalent experience
 * Years of experience: 12+ years
 * Total Compensation: $305k+ yearly

## Description

* Design, develop, and maintain backend libraries and services to transform diverse data formats into standardized schemas.
 * Leverage Java as the primary development language alongside Python for targeted backend components.
 * Administer Linux-based environments and optimize MongoDB production databases.
 * Support operational server tasks using RPMs and collaborate using Git-based workflows., * Design and implement data ingestion and transformation logic for diverse data structures including JSON, XML, and CSV.
 * Develop and maintain robust, reusable shared backend libraries and integration services.
 * Ensure system performance, high availability, and scalability for backend data pipelines.
 * Manage, monitor, and optimize MongoDB instances within enterprise Linux ecosystems.
 * Perform Linux systems administration duties including upgrading servers, installing RPMs, and troubleshooting environment issues.
 * Participate in architectural decisions regarding data modeling, schemas, and integration patterns.
 * Practice modern software engineering methodologies, including Git version control and peer code reviews.


## Related Videos

- [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers)
- [40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs](https://www.wearedevelopers.com/videos/208-40-minutes-to-build-a-serverless-covid-19-rest-and-graphql-apis)
- [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json)
- [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)
- [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure)
- [Grappling With Clunky Old Software? Start by Understanding What’s Inside!](https://www.wearedevelopers.com/videos/1189-grappling-with-clunky-old-software-start-by-understanding-what-s-inside)

## Related Articles

- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)
- [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)
- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)
- [How Much Does a Software Engineer Make? Realistic Software Engineering Salaries](https://www.wearedevelopers.com/magazine/425-how-much-does-a-software-engineer-make-realistic-software-engineering-salaries)
- [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025)