Senior Software Engineer; Subject Matter Expert Software Developer

Position Title:

Senior Software Engineer (Subject Matter Expert Software Developer, Application)

Location:

Remote (U.S.)

Client:
Federal Government Programs

Employment Type:

Full-Time | Contract

Work Authorization: U.S. Citizenship required. Candidates must be eligible to obtain and maintain a favorably adjudicated Federal Public Trust suitability determination.

WINTrio LLC is seeking an experienced Senior Software Engineer to design, develop, integrate, deploy, and sustain full-stack software and AI-enabled applications supporting mission-critical Federal programs.

This position will support development of production-quality applications across front-end, middleware, back-end, database, cloud, and infrastructure layers. The successful candidate will build scalable applications using modern software frameworks, support AI application integration, manage CI/CD and Infrastructure as Code, and improve application performance, reliability, observability, and maintainability.

The ideal candidate will possess extensive experience in full-stack software engineering, software architecture, relational databases, Agile development, cloud computing, Dev Ops, and modern application frameworks such as the PERN stack.

• Design, develop, test, deploy, maintain, and improve enterprise software applications.
• Develop full-stack solutions across front-end, middleware, APIs, back-end services, and relational databases.
• Develop applications using technologies such as PostgreSQL, Express.js, React.js, and Node.js.
• Build responsive, human-centered front-end solutions using HTML, CSS, JavaScript, and modern JavaScript frameworks.
• Develop scalable APIs, microservices, integration services, and application interfaces.
• Support integration of generative AI, RAG, predictive analytics, document processing, and other AI services into enterprise applications.
• Analyze user requirements, information needs, system flows, data usage, and business processes.
• Determine system specifications, architecture requirements, interfaces, and technical implementation approaches.
• Develop applications using multiple frameworks and modern software engineering tools.
• Design and optimize relational database structures and application data access patterns.
• Implement infrastructure using Terraform and other Infrastructure as Code technologies.
• Develop and maintain CI/CD pipelines supporting automated application build, testing, deployment, and release.
• Manage Git-based source code, branching, versioning, and collaborative development workflows.
• Integrate observability, monitoring, logging, and application performance tools into software solutions.
• Perform application testing, debugging, performance analysis, and root cause troubleshooting.
• Conduct systems analysis and recommend technical, architectural, process, or performance improvements.
• Direct or support system installation, upgrades, releases, and production deployments.
• Collect, analyze, and summarize development, performance, and service issues.
• Participate in Scrum and Agile ceremonies, sprint delivery, demonstrations, and iterative development.
• Support secure software development, role-based access control, data management, and ATO requirements.
• Develop accessible user interfaces and ensure applicable ICT solutions support Section 508 compliance.

• Bachelor's or Master's degree in Computer Science, Artificial Intelligence, Machine Learning, Software Engineering, or a related field.
• Five (5) to ten (10) years of relevant software development or software engineering experience.
• Extensive experience in enterprise software development and scripting.
• Experience working within Scrum or Agile software development environments.
• In-depth knowledge of relational databases.
• Hands-on experience developing applications using multiple frameworks.
• Strong proficiency with software engineering tools and software architecture.
• Strong full-stack development experience.
• Experience with PERN or comparable modern full-stack technologies, including PostgreSQL, Express.js, React.js, and Node.js.
• Experience with Terraform or comparable Infrastructure as Code technologies.
• Expertise managing CI/CD pipelines.
• Strong experience with Git-based source code management.
• Experience integrating observability tooling into software engineering environments.
• Experience supporting software installation, upgrades, and production releases.
• Strong understanding of the Software Development Life Cycle.
• Excellent analytical, technical…