> Markdown version of [/jobs/ext/2675376-senior-application-developer](https://www.wearedevelopers.com/jobs/ext/2675376-senior-application-developer). 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).

---

# Senior Application Developer

- **Company:** Markon, LLC.
- **Location:** Annapolis, MD, United States
- **Experience:** Expert
- **Salary:** $200,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Agile Methodology, Business Analytics Applications, Data Analysis, Confluence, JIRA, Big Data, Python (Programming Language), Machine Learning, Software Engineering, Data Streaming, Jupyter Notebook, Plex, Gitlab, Pyspark
- **Published:** September 1, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9131282/senior-application-developer

## About the Role

* Technical Proficiency: Experience with Jupyter Notebooks, GM, Java, Python, PySpark. Experience with customer tools, architecture, data flow, and use of big data. Familiarity with machine learning fundamentals and data analysis. Experience with Jira, Confluence, Gitlab; familiarity with Agile methodologies, * Active TS/SCI with Polygraph is required
 * Bachelor's degree in a related technical field is required
 * Minimum of 5+ years of relevant experience or equivalent
 * Experience with Jupyter Notebooks, GM, Java, Python, PySpark.
 * Experience with customer tools, architecture, data flow, and use of big data.
 * Familiarity with machine learning fundamentals and data analysis.
 * Experience with Jira, Confluence, Gitlab; familiarity with Agile methodologies

## Description

PLEX Solutions, A Part of Markon is looking for a motivated Senior Application developer to create custom analytics to perform at scale. The Senior Application Developer will work closely with data scientists and end users to develop innovative analytic tools to further discovery and tradecraft around critical global challenges, then deliver innovative solutions focused on operationalizing data science., * Mission Focus: Work directly with data scientists as well as mission analysts to solve the most demanding strategic problems; perform software engineering to prototype, develop, integrate, test, deploy and maintain tools and tradecraft into the customer's corporate architecture.


## Related Videos

- [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray)
- [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more)
- [Data Science on Software Data](https://www.wearedevelopers.com/videos/162-data-science-on-software-data)
- [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data)
- [Collaboration Quantified: Lessons from Open Source Developer Networks](https://www.wearedevelopers.com/videos/1422-collaboration-quantified-lessons-from-open-source-developer-networks)
- [Marko.js: Unsung Hero of Scalable Web Frameworks](https://www.wearedevelopers.com/videos/1669-marko-js-unsung-hero-of-scalable-web-frameworks)

## Related Articles

- [Everything a Developer Needs to Know About MCP with Neo4j](https://www.wearedevelopers.com/magazine/604-everything-a-developer-needs-to-know-about-mcp-with-neo4j)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023)
- [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)
- [Why Attend a Developer Event in 2026?](https://www.wearedevelopers.com/magazine/688-why-attend-a-developer-event-in-2026)
- [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)