TransCore (TRN), a subsidiary of ST Engineering, is seeking a full-time Senior Software Development Engineer to join our Software Development team in Round Rock, Texas.

Summary
The Senior Software Development 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.

Essential Duties and Responsibilities
Include the following. Other duties may be assigned.

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/Java 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.
Mentor junior and mid-level engineers.
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.
Design, develop, and tune relational data structures, stored procedures, and queries in Microsoft SQL Server supporting high-volume transactional toll data.
Develop and maintain responsive Angular front-end applications that expose real-time toll and account data to operations and customer service users.
Apply AI-assisted development tools and large language model (LLM) capabilities to accelerate delivery, and contribute to the design, integration, and evaluation of AI/LLM-enabled product features.
Document program code thoroughly and assist in preparing or updating user manuals and technical guides.

Requirements and Qualifications
To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below represent the knowledge, skill, and/or ability required.

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.
10 to 13 years professional software development experience building multi-threaded applications in C# using.NET Core (now .NET), primarily on Linux based systems and front-end development with Angular.
Proficient understanding of client-side scripting and JavaScript frameworks.
Good understanding of Angular and Typescript, Material design, Kendo.
Good understanding of asynchronous request handling, partial page updates, and AJAX.
Proficient understanding of cross-browser compatibility issues.
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.
Strong experience with Microsoft SQL Server database development, including T-SQL, stored procedures, schema design, indexing, and query performance tuning against large transactional data sets.
Practical experience developing, packaging, and deploying applications using Docker or similar containerization technologies.
Hands-on experience using AI-assisted development tools (for example GitHub Copilot, Claude Code, or equivalent) in day-to-day engineering work, with a practical understanding of large language model (LLM) capabilities, limitations, and appropriate use.
Demonstrated passion for software design, problem solving, and hands-on development, with a commitment to delivering high-quality, maintainable software solutions.
Strong communication skills to deliver instructions for the team and communicate well with others.
Sound decision making and independent judgment.

Desired Qualifications:

Advanced experience developing applications using .NET Core (now .NET), and modern .NET technologies.
Cloud solution experience platform independent (Linux, Windows).
The candidate should have experience with unit testing and should have a strong commitment to delivering high-quality, bug-free code on time.
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 troubleshoot applications running in Linux-based production environments.
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 separation of concerns between frontend clients and backend services.
Familiarity with modern frontend frameworks and tools such as Angular, Kendo UI, and Tailwind are desirable.
Excellent analytical and problem‑solving skills, especially in diagnosing complex technical challenges.
Experience integrating large language models (LLMs) or other AI/ML services into production applications, including prompt design, API integration, retrieval-augmented generation (RAG), and evaluation of model output quality.
Awareness of data privacy, security, and governance considerations when applying AI/LLM technologies to customer and transactional data.

Physical Demands/Work Environment
While performing the duties of this job, the employee is regularly required to talk or hear. The employee is frequently required to sit. The employee is occasionally required to stand, walk; use hands to finger, handle, or feel and reach with hands and arms. The employee must occasionally lift and/or move up to 10 pounds. The noise level in the work environment is usually moderate.

* TransCore complies with federal and state disability laws and provides reasonable accommodation for employees with disabilities.