Senior Developer

Lead a small, collaborative development team supporting the sustainment and continuous enhancement of a mission-critical Enterprise Support Services application that enables a key operation.

Serve as a senior technical point of contact between the development team and the customer, helping translate customer needs into clear, actionable technical requirements and solutions.

Engage with customers and stakeholders to understand business needs, communicate technical approaches, refine requirements, and build alignment and buy-in for proposed solutions.

Build intuitive, responsive web interfaces backed by robust data retrieval and storage capabilities.

Apply hands-on expertise with modern Python frameworks – such as Django, FastAPI, or Flask – to deliver scalable, secure, and performant applications.

Apply hands-on expertise with modern JavaScript and front-end frameworks, specifically React.js and Vue.js, to deliver high-quality user interfaces and dynamic, client-side application features.

Integrate backend services through RESTful APIs to support seamless data flow and reliable application functionality.

Leverage full-stack development skills across Python backend services and modern JavaScript front-end architectures to deliver scalable, end-to-end solutions.

Demonstrate strong experience with relational database management systems (RDBMS), with primary expertise in PostgreSQL and secondary experience with Oracle and SQL Server.

Translate complex business requirements into effective enhancements within existing database structures and application logic.

Support and execute application upgrades while implementing code enhancements that improve performance, maintainability, and long-term sustainability.

Develop efficient data retrieval solutions that power user-friendly displays and dynamic application views.

Diagnose, troubleshoot, and resolve application defects to help maintain system stability and a positive user experience.

Design, build, and deploy Dock containerized applications to Linux servers.

Conduct thorough unit testing to validate software reliability, performance, and feature accuracy.

Collaborate within Git/GitLab workflows and contribute to CI/CD pipelines that enable smooth, automated, delivery of application updates.

Bring a proactive, ownership-oriented approach to problem-solving, provide technical leadership to the development teams, and demonstrate a strong willingness to take on new challenges and learn emerging technologies.

Actively contribute in an Agile environment by participating in sprint planning, backlog grooming, and iterative development cycles that deliver continuous value.

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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.