The Role
Develop and maintain Java web applications using Jakarta Servlets, REST APIs, JSP, JavaScript, Tomcat, Linux, LDAP, and MariaDB. Build secure authentication, authorization, PKI, encryption, SSH, certificate, and data transmission solutions. Administer Linux systems, deploy applications, manage databases, write maintainable code, troubleshoot security infrastructure, and collaborate with technical and non-technical stakeholders. Desired work includes Python web integration, Confluence plugins, and Active Directory Certificate Services.
Summary Generated by Built In
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:
Required skills:
- Expert-level knowledge of Core Java (NOT Spring Boot), Eclipse IDE v2026, Java 17 or later, JVM, JRE, and JDK concepts, JavaScript, AJAX, jQuery, JSP, Apache Tomcat 11 or later, Tomcat connector, MariaDB (MySQL) v10 or latest, HTML5, CSS, JSON/XML HTTP, HTTPS, REST API, SSH, PKI, OpenSSL, Putty, Linux and LDAP.
- Extensive experience with LDAP authentication and authorization, and custom LDAP-based solutions.
- Strong experience with SSH and Putty, and custom SSH-based tools and applications on Linux platform.
- Experience with Linux system administration and command-line tools.
- Experience w/ Java REST API development, and API secure requests using application certificates and scalability for user activity monitoring.
- Experienced w/ JDBC, DAO pattern and configuration using MariaDB (MySQL) and custom database tools and scripts - connection pooling without framework.
- Experience deploying applications on Apache Tomcat, configuring Tomcat connectors, and managing HTTPD (Apache HTTP Server).
- Experience w/ front-end development w/ JSP, AJAX, jQuery, JavaScript, HTML and CSS design for web presence and back-end development.
- Experienced writing Jakarta Servlet API, including servlet lifecycle, request and response handling, and session management.
- Experience w/ Java Base64 API, that encodes and decodes data, including its usage and limitations.
- Knowledge of Java Cryptography Architecture (JCA) and its APIs.
- Knowledge of encryption algorithms, such as AES, RSA and ECC and their usage in Java.
- Experience w/Quartz Job Scheduling Library using Core Java development.
- Experience w/ software version control tools (Git/GitHub) code repository.
- Knowledge of PKI infrastructure and secure data transmission, and custom PKI-based tools and applications.
- Knowledge of X.509 certificate handling, including certificate parsing, certificate validation and certificate chaining.
- Experienced in generating, managing, and storing key pairs using OpenSSL, and RSA, troubleshooting PKI-related issues, including key pair and certificate problems.
- Strong problem-solving skills and analytical thinking, attention to detail, and excellent communication and collaboration skills with technical and non-technical stakeholders.
- Ability to analyze user needs to determine technical requirements.
- Ability to write clean, maintainable, and well-documented code.
- Shows initiative and offers ideas for new products and improvements to existing interfaces.
- Actively keeps apprised of industry technological enhancements and changes.
Desired skills:
- Some experience integrating Python into web applications.
- Some experience Writing Confluence plugins.
- Familiar w/ Windows Active Directory Certificate Services (AD CS) - for issuing and managing key infrastructure (PKI) certificates.
A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
Qualifications Education Preferred BA/BS or better. Experience Required Demonstrated work related experience. Equal Opportunity EmployerThis employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.
Skills Required
- Expert-level knowledge of Core Java, Java 17 or later, JVM, JRE, and JDK concepts
- Experience with Eclipse IDE, JavaScript, AJAX, jQuery, JSP, Apache Tomcat, MariaDB or MySQL, HTML5, CSS, JSON/XML, HTTP/HTTPS, REST APIs, SSH, PKI, OpenSSL, PuTTY, Linux, and LDAP
- Extensive experience with LDAP authentication, authorization, and custom LDAP-based solutions
- Strong experience with SSH, PuTTY, Linux-based tools, and custom SSH applications
- Experience with Linux system administration and command-line tools
- Experience developing Java REST APIs and securing requests with application certificates
- Experience with JDBC, DAO patterns, MariaDB or MySQL configuration, database tools, scripts, and connection pooling without frameworks
- Experience deploying applications on Apache Tomcat, configuring Tomcat connectors, and managing Apache HTTP Server
- Front-end and back-end development using JSP, AJAX, jQuery, JavaScript, HTML, and CSS
- Experience writing Jakarta Servlet API code, including lifecycle, request and response handling, and session management
- Experience with Java Base64 API
- Knowledge of Java Cryptography Architecture and encryption algorithms including AES, RSA, and ECC
- Experience with Quartz Job Scheduling Library
- Experience with Git or GitHub version control
- Knowledge of PKI infrastructure, secure data transmission, and PKI-based applications
- Knowledge of X.509 certificate parsing, validation, and chaining
- Experience generating, managing, and storing key pairs using OpenSSL and troubleshooting PKI issues
- Strong problem-solving, analytical, communication, collaboration, and technical documentation skills
- Ability to analyze user needs and determine technical requirements
- Ability to write clean, maintainable, and well-documented code
- U.S. citizenship
- Active/current TS/SCI with Polygraph clearance
- Bachelor's degree or better
- Experience integrating Python into web applications
- Experience writing Confluence plugins
- Familiarity with Windows Active Directory Certificate Services
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The Company
What We Do
GCI is an Engineering and IT Services company focusing on Data Analytics, Engineering, Cyber Operations, Targeting and Analysis, Operations Solutions and Training. We help our customers solve their greatest challenges by providing exceptional consulting and mission solutions.
