Software Engineer 3 (Interface Design & Data Visualization) with Security Clearance

Cornerstone Defense LLC; Annapolis (MD); On-site; USD 190,000 - 210,000; Full time

Benefits offered by this job

JIRA/Confluence access

Job summary

Cornerstone Defense LLC is seeking a Software Engineer 3 to enhance a Streamlit UI prototype and evolve it into an external interface. The role involves expanding data visualization and interface features using Python and front-end tech, with emphasis on secure, enterprise-grade delivery.

The candidate should have a Master’s degree or substantial SWE experience (5+ to 9+ years), strong Linux, Bash, and scripting skills, and proficiency in Python, Java, and modern JS frameworks.

Qualifications

• Master's degree in computer science or related discipline plus 5 years of SWE experience or equivalent
• Bachelor's degree plus 7 years of SWE experience or 9 years total experience
• Experience with Linux CLI and scripting, Python and Java, and front-end tech (TypeScript/HTML/CSS) required

Responsibilities

• Enhance a UI prototype built with Streamlit and evolve it into a user-facing interface
• Plan and implement data visualization and data processing features
• Collaborate with teams across defense-focused programs and maintain code quality

Skills

Linux CLI

Bash scripting

Python

Java

Streamlit

TypeScript

HTML/CSS

JS frameworks

Apache Spark

Jupyter Notebook

Pandas/NumPy

Data formats

Data quality

Git

Apache Airflow

SQL

HPC Slurm

JIRA/Confluence

Education

Master's degree in computer science or related discipline

Bachelor's degree in computer science or related discipline

9+ years of SWE experience

Tools

Git

JIRA

Confluence

Apache Airflow

Slurm

Job description

Title: Software Engineer 3 (Interface Design & Data Visualization) Location: Annapolis Junction, MD Compensation Range: $190 -$210K

• Clearance:
• Active TS/SCI w/ Polygraph needed to apply
• Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation's toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don't look any further than Cornerstone Defense. Benefits Overview: Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans
• Generous PTO Policy
• 401(k)
• HSA and FSA options
• Life and Disability Insurance
• Tuition Reimbursement and Training
• Perks at Work Discount Program
• Referral Program
• Leads Generation Program
• CollegeAmerica 529
• Fitness Reimbursement Program
• Travel Assistance
• Norton Lifelock Benefit Solutions
• Life Planning Financial & Legal Services
• Summary: The Software Engineer shall be responsible for enhancing a UI prototype that was developed using Streamlit and build it into an interface with future plans to make the interface available external to the corporate enterprise. Qualifications: Master's degree in computer science or related discipline from an accredited college or university, plus five (5) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity. OR Bachelor's degree in computer science or related discipline from an accredited college or university, plus seven (7) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity OR Nine (9) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity. Required Skills:
• Experience using the Linux CLI and Linux tools
• Experience developing Bash scripts to automate manual processes
• Recent software development experience using Python and Java
• Familiar with Streamlit, a Python framework for building interactive web applications
• Experience developing front-end applications using TypeScript, HTML, and CSS
• Experience with JavaScript frameworks such as React, Angular, and Vue
• Familiar with Distributed Big Data processing engines including Apache Spark
• Experience using Jupyter Notebook
• Experience with data wrangling and preprocessing using tools such as pandas, NumPy
• Experience working with structured, semi-structured, and unstructured data such as Parquet, JSON, CSV, XML
• Familiarity with data quality concepts, data validation, and anomaly detection
• Experience with Git Source Control System
• Experience using Apache Airflow (DAG design, scheduling, operators, sensors) to orchestrate, schedule, and monitor complex workflows
• Experience with SQL technologies such as MySQL, MariaDB, and PostgreSQL for querying, joining, and aggregating large datasets
• Familiar with HPC Job Scheduling tools including Slurm Experience using the Atlassian Tool Suite (JIRA, Confluence)