Sr Software Engineer

Trans Core (TRN), a subsidiary of ST Engineering, is seeking a talented Sr. Software Engineer to join our Software Development team in Round Rock, Texas.

The Sr. Software Engineer will participate in software development team responsibilities focusing on .net projects with an exciting level of risk, complexity and visibility. As a member of a small and focused Solutions Development Team, you may be required to perform various duties within the software development lifecycle - analysis, designer, developer and unit tester. This is a unique opportunity to work in all areas of the software development lifecycle and have view and participation in the entire process.

We are building a team of energetic, self‑motivated and passionate developers who strive to be the absolute best and enjoy working with other team members towards a common goal. Our company has an entrepreneurial spirit and welcomes individuals with a can‑do attitude, the drive to succeed, and the desire to make an impact within our company.

• Design, develop, test, and enhance software systems that perform critical, real‑time processing of data collected from toll collection equipment, executing business logic and decision‑making based on incoming data.
• Build and maintain robust, scalable, multi‑threaded services and applications using C#, modern .NET frameworks, and various APIs.
• Participate in daily Scrum meetings, provide updates on task progress and collaborate closely with the team to ensure timely delivery of sprint goals.
• Contribute to design discussions for new toll system features and performance improvements to existing functionality.
• Assist in system installations and provide post deployment support for customer reported issues
• Assist in trouble shooting customer reported bugs and update the program code base for bug resolutions
• Provide experience‑based timelines and estimates for delivering high‑quality products based on requirements and specifications.
• Demonstrate hands‑on experience building and deploying containerized applications, contributing to modernized and portable deployment workflows.
• Document program code thoroughly and assist in preparing or updating user manuals and technical guides.

• Bachelor's degree in computer science or a related Engineering field required, or equivalent experience. Master's degree in computer science or a related Engineering field is highly preferred.
• 5 years professional software development experience building multi‑threaded applications in C#  Core (now .NET), primarily on Linux based systems
• Strong foundation in Object‑Oriented Architecture (OOA) and Service‑Oriented Architecture (SOA) principles, with the ability to design modular, maintainable, and scalable systems.
• Proven ability to design and implement scalable, high‑performance APIs and microservices.
• Experience with database development using Microsoft SQL Server.
• Practical experience developing, packaging, and deploying applications using Docker or similar containerization technologies. Demonstrated passion for software design, problem solving, and hands‑on development, with a commitment to delivering high‑quality, maintainable software solutions.
• Advanced experience developing applications using .NET Core (now .NET), and modern .NET technologies.
• Experience working in web and desktop/application environments is beneficial for understanding end‑to‑end system behavior, though primary responsibilities focus on backend services running in Linux‑based production environment understanding end‑to‑end system behavior, though primary responsibilities focus on backend services and APIs.
• Ability to build, deploy, and troubleshoot applications running in Linux‑based production environments.
• Hands‑on experience implementing CI/CD pipelines using tools such as Git Hub Actions, Azure Dev Ops, Jenkins, or Git Lab CI.
• Working knowledge of message queues and asynchronous/event‑driven communication patterns.
• Strong commitment to unit testing, code quality, and delivering maintainable, high‑reliability software.
• Strong understanding of component‑based web application architectures and clear…