VG Software Engineer 3

Probity Inc.; McLean (VA); On-site; USD 140,000 - 180,000; Full time

Job summary

Probity Inc. in the United States is seeking a senior Java developer with active TS/SCI clearance with polygraph to design, implement, and secure Java-based services. You will work on PKI-enabled REST APIs, LDAP integrations, and secure backend tooling in a Linux/Tomcat environment.

Responsibilities include building scalable services, managing certificates, and collaborating with stakeholders to meet mission-critical requirements while ensuring code quality and security compliance.

Qualifications

• LDAP auth experience with custom LDAP-based solutions.
• SSH-based tools and applications on Linux.
• Linux system administration and CLI proficiency.
• Java REST API development with secure requests and scalability.
• JDBC/DAO with MariaDB and custom DB tools.
• Tomcat configuration and Apache HTTPD management.
• Jakarta Servlet API lifecycle and handling.
• Java Base64 usage and limitations.
• Knowledge of JCA and crypto APIs (AES, RSA, ECC).
• Quartz scheduling with Core Java.
• Git/GitHub version control.
• PKI infrastructure, X.509 handling and OpenSSL key mgmt.
• Strong problem solving, communication, and collaboration.

Skills

LDAP auth

SSH tools

Linux admin

Java REST API

JDBC/DAO

Tomcat/Apache

Jakarta Servlet

Java cryptography

AES_RSA_ECC

Quartz scheduling

Git/GitHub

PKI security

X.509 handling

OpenSSL

Analytical thinking

Communication

Requirements analysis

Clean code

Tools

Tomcat

HTTPD

MariaDB

OpenSSL

Job description

PLEASE NOTE: This position requires an ACTIVE Top Secret/SCI Clearance with Polygraph. To be considered for this position, you MUST have an ACTIVE Clearance Level of Top Secret/SCI with Polygraph

Position Code: 03-SO0924-1

Dulles/McLean

Requires strong Java development (Java17 or later), Confluence, JAVA EE development experience or Jakarta; PKI SSL/TLS. No cloud experience required.

Required skills:

• 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)
• 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;
• Familiar w/ Windows Active Directory Certificate Services (AD CS) – for issuing and managing key infrastructure (PKI) certificates