Software Engineer (Sustainment Software Engineer)

Job Description

This position is ideal for a hands-on engineer who enjoys working across multiple technologies and technical disciplines. The selected candidate will support a diverse portfolio of Commercial Off-the-Shelf (COTS) and Government Off-the-Shelf (GOTS) enterprise applications utilizing both modern and legacy technology stacks. Responsibilities may include application development, system integration, application configuration and customization, cloud modernization, and production sustainment. Success in this role requires adaptability, strong technical problem-solving skills, and the ability to quickly learn new technologies as mission priorities evolve.

The ideal candidate is a versatile software developer with experience building and supporting enterprise applications. You should be comfortable working with Java, JavaScript, Oracle databases, and SQL, and have the aptitude and willingness to learn additional programming languages, frameworks, and technologies based on the needs of the products and applications you support.

Primary Responsibilities:

Maintain, enhance, and modernize backend services developed using Java and Spring Boot.

Develop, maintain, and troubleshoot software using JavaScript and other programming languages and technologies as required by the product.

Work with Oracle databases and SQL to develop, troubleshoot, optimize, and support application data and database interactions.

Learn and apply additional programming languages, frameworks, tools, and technologies as required by evolving application and mission needs.

Update software requirements, libraries, frameworks, and dependencies to ensure applications remain secure, supported, and maintainable.

Analyze and implement code changes resulting from dependency, framework, and technology upgrades.

Perform application maintenance activities, including troubleshooting, root-cause analysis, issue identification, and defect resolution.

Design and implement code enhancements and technical improvements based on customer, program, and operational requirements.

Collaborate with customers, software developers, systems engineers, and other stakeholders to deliver timely and effective solutions.

Participate in Agile ceremonies and contribute to sprint planning, estimation, technical discussions, and continuous improvement activities.

Support application deployments, troubleshooting, and operational activities within Linux and Docker-based environments.

Contribute to the long-term stability, reliability, security, performance, and modernization of mission-critical enterprise applications.

Technology Stack:

Java

JavaScript

AWS

MySQL

Linux

Maven

SpringBoot

Docker

Angular

Git

GitLab

Atlassian Tool Suite

Oracle

Node.JS

Maven

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Required Skills

TS/SCI with Polygraph

A bachelor’s degree and six (6) years of experience in software development/ engineering in programs and contracts of similar scope, type, and complexity. Ten (10) years of software development experience may be substituted in lieu of a bachelor’s degree.

Experience with Java development.

Experience working with Oracle databases, including SQL development.

Experience with a JavaScript framework such as Angular.

Experience developing in the Linux operating system.

Experience with Docker for containerized application deployment and management.

Must be able to work between the core hours of 10AM-2PM. Exceptions will be considered on a case-by-case basis.

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Desired Skills

AWS experience

Experience in an Agile development environment

Experience working with the Atlassian Tool Suite

Experience with Python

Experience with GitLab for version control

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About Castello Systems, Inc.

At Castello Systems, we are focused on delivering solutions. One way we do this is through the integration of COTS products into our customer's enterprise. We are successful because we are experts in the tools we integrate and are experts in the intricacies of our customer’s enterprise. Many of our peers fail because they are not able to bring these two components together. When Castello Systems is brought in, our folks have access to all the resources across the company and through our partnerships with COTS vendors. When you have one of us, you have all of us. Castello Systems prefers completion based contracts. This gives us the flexibility to bring to bear the right level of expertise and when needed to deliver. Castello Systems specialize in architecting, implementing, and executing Enterprise Management through the use of industry leading technologies such as OpenText Software, Splunk, and Elastic Stack.