TMS International

W2 Only | Senior .NET/C# Engineer with AI | Coppell, TX | Onsite | Long Term

TMS International$120K — $145K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's or Master's degree in Computer Science, Engineering, or related field.
  • 9+ years of experience in software development using .NET and C#.
  • 1+ years of experience developing AI solutions and agents using Microsoft technologies.
  • Strong understanding of prompt engineering, context engineering, and LLM-based architectures.
  • Experience with RESTful APIs, microservices, and cloud-native development.
  • Familiarity with CI/CD pipelines, Git, and agile methodologies.
  • Excellent problem-solving, communication, and collaboration skills.

Responsibilities

  • Design, develop, and maintain scalable .NET/C# applications and services.
  • Implement AI-powered solutions using Microsoft Azure AI services.
  • Build and deploy intelligent agents that integrate with enterprise systems.
  • Optimize agent behavior using prompt and context engineering.
  • Integrate retrieval-augmented generation (RAG) pipelines to enhance agent knowledge.
  • Leverage tool use orchestration and action planning for agent interactions.
  • Implement memory management strategies for intelligent agents.

Benefits

  • Long-term engagement with potential for career growth.
  • Opportunity to work onsite in a collaborative environment.
  • Access to the latest Microsoft technologies and AI advancements.
  • Possibility to work on innovative projects impacting enterprise solutions.
Full Job Description
Job Description

Role: Senior Software Engineer (.NET/ C#) with AI

Duration: Long Term

Location: Coppell, TX- Onsite

We are seeking a highly skilled and forward-thinking Senior Software Engineer with over 9 years of experience in designing and developing enterprise-grade solutions using .NET and C#, and at least 1 year of hands-on experience building AI solutions and intelligent agents on the Microsoft platform. The ideal candidate will be passionate about leveraging Prompt Engineering, Context Engineering, RAG, Vectorization & Indexing, and modern AI techniques to drive innovation and efficiency across our technology stack.

Key Responsibilities
  • Design, develop, and maintain scalable .NET/C# applications and services.
  • Design and implement AI-powered solutions using Microsoft Azure AI services, including Azure OpenAI, Azure AI Foundry, Cognitive Services and Microsoft Agent Framework.
  • Build and deploy intelligent agents that integrate with enterprise systems and workflows.
  • Apply prompt engineering and context engineering to optimize agent behavior and model outputs.
  • Integrate retrieval-augmented generation (RAG) pipelines to enhance agent knowledge and responsiveness.
  • Leverage tool use orchestration and action planning to enable agents to interact with external systems and APIs.
  • Implement memory management strategies for agents (episodic, semantic, and working memory).
  • Use state management, goal tracking, and feedback loops to support autonomous decision-making.
  • Evaluate and verify AI agents using various techniques and tools.
  • Collaborate with cross-functional teams including product managers, data scientists, and DevOps to deliver high-impact solutions.
  • Conduct code reviews, mentor junior engineers, and contribute to best practices in software development and AI integration.
  • Stay current with emerging technologies and trends in AI, machine learning, and software engineering.


Required Qualifications
  • Bachelor's or Master's degree in Computer Science, Engineering, or related field.
  • 9+ years of experience in software development using .NET and C#.
  • 1+ years of experience developing AI solutions and agents using Microsoft technologies.
  • Strong understanding of prompt engineering, context engineering, and LLM-based architectures.
  • Experience with RESTful APIs, microservices, and cloud-native development.
  • Familiarity with CI/CD pipelines, Git, and agile methodologies.
  • Excellent problem-solving, communication, and collaboration skills.


Preferred Qualifications
  • Experience with Azure OpenAI, Azure AI Foundry, Semantic Kernal Framework, AutoGen, Lang Graph, Machine Learning, or other Microsoft AI platforms.
  • Knowledge of NLP, generative AI, and conversational agent design.
  • Certifications in Microsoft Azure or AI-related technologies.
  • Contributions to open-source projects or technical blogs.


Qualifications

Additional Information

About TMS International

TMS International is a provider of outsourced industrial services to steel mills around the world. The company was founded in 1926 and is headquartered in Pittsburgh, Pennsylvania. TMS International offers a range of services, including scrap management, raw material procurement, and slag handling and processing. The company has operations in North America, Europe, and Asia, and serves customers in the steel, aluminum, and other metals industries. TMS International is committed to sustainability and has implemented a number of initiatives to reduce its environmental impact, including the use of renewable energy sources and the development of new technologies to improve efficiency.
Learn more about TMS International
Size
4,000 employees
Industry
Founded
1926

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