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Software Engineer (.NET)

Marathon TS

Role overview

Qualifications

  • Bachelor's or master's degree in computer science, electronics engineering or other engineering or technical discipline
  • Minimum of 8 years of experience in software development using C#/.NET technologies
  • Strong proficiency in C#/.NET ecosystem
  • Hands-on AWS experience preferred

Responsibilities

  • Design, build, and maintain C#/.NET/AWS backend services handling high-volume healthcare EDI transactions
  • Parse, validate, and transform X12 EDI documents
  • Debug complex transaction-level issues across payers, clearinghouses, and trading partners
  • Write clean, testable, well-documented code and participate actively in code review

Key facts

Hard skills

Other skills

  • Problem Solving
  • Communication
  • Teamwork
  • Detail Oriented
  • Time Management

About the company

Marathon TS logo

Marathon TS

IT Services & IT Consulting

Marathon TS provides winning IT solutions for government and industry as a WBENC Certified Woman-Owned Small Business. We were founded in 2009 by IT professionals with a proven record of success in building IT services companies. Marathon TS provides digital solutions in cloud, mobile, big data, IoT, cybersecurity, and advanced analytics through user-centric designs driven by Agile (SAFe) methodologies and DevSecOps best practices. We also provide scalable support through our network of experts who specialist in specific technical or subject matter disciplines. As a Prime Contractor, we have successfully provided services to the U.S. Federal Government, including the Intelligence Community, the Department of State, the Department of Energy, the Defense Health Agency, and the Department of Veterans Affairs, as well as the U.S. Air Force and U.S. Navy. Private sector clients include IBM, Lockheed Martin, Booz Allen Hamilton, BAE Systems, Leidos, and more. Marathon’s success depends on building and maintaining strong relationships with our clients that are based on mutual trust, responsiveness, accountability, and customer satisfaction. Our goal is to understand our clients business as well as we understand our own. It is our responsibility to know our clients industry and the business challenges they face.

Company details

Company typeSME
IndustryIT Services & IT Consulting
Company size51 - 200

Links

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Job description

Sr. Software Systems Engineer (C#/.NET Developer)
Marathon is searching for a motivated, career and customer-oriented Sr. Software Engineer (C#/.NET Developer) who will work across EDI transaction processing, backend API development, and cloud native systems on AWS. This is a hands-on engineering role with direct impact on how VA healthcare data flows through our platform. This is a 100% Remote role.
JOB DESCRIPTION
  • Design, build, and maintain C#/.NET/AWS backend services handling high-volume healthcare EDI transactions (837, 835, etc.)
  • Parse, validate, and transform X12 EDI documents
  • Debug complex transaction-level issues across payers, clearinghouses, and trading partners
  • Write, optimize, and troubleshoot SQL stored procedures including performance tuning, query analysis, and complex data transformations
  • Work with XML object store data: query, parse, and manipulate structured XML within MSSQL
  • Write clean, testable, well-documented code and participate actively in code review
  • Contribute to shared platform libraries and services used across multiple product initiatives
  • Performs technical planning, high level and detailed requirements definition, test planning and execution with team members and stakeholders on a daily basis
  • Serve as an active member of the software development team participating in daily stand-ups
  • Deploy, support and ensure the performance, quality, and responsiveness of application
  • Provide development support, as needed, for solutions deployed to production
  • Implement long term solutions and building blocks within the agile framework for improved reusability
  • Apply and promote best software engineering practices
  • Use Integrated Development Environment (IDE) tools to include Visual Studio and Git
Education
  • Bachelor's or master's degree in computer science, electronics engineering or other engineering or technical discipline is required.
Experience
  • Minimum of 8 years of experience in software development using C#/.NET technologies
  • Proven track record of working on complex software projects and leading development initiatives
  • Experience with designing, developing, and deploying enterprise-level applications

Requirements
  • Strong proficiency in C#/.NET ecosystem
  • Proficiency in developing back-end applications using design and integration patterns
  • Hands-on AWS experience (serverless, messaging, storage, databases) preferred
  • Strong SQL skills: writing and optimizing stored procedures, troubleshooting execution plans, performance tuning in MSSQL
  • Proficient with Git and GitHub
  • Experience with MSSQL or similar relational databases
  • Proficiency in database design and development, including working with SQL Server and Entity Framework.
  • Familiarity with cloud platforms (e.g., Microsoft Azure, AWS) and services.
  • Understanding of continuous integration/continuous deployment (CI/CD) practices and tools (e.g., AWS CodePipeline, CodeBuild, CodeDeploy).
  • Knowledge of unit testing frameworks and tools (e.g., NUnit, xUnit, MSTest). - Proficiency in using development tools like Visual Studio and Visual Studio Code.
  • Excellent problem-solving and analytical skills.
  • Strong communication and interpersonal abilities.
  • Ability to work independently and as part of a large team.
  • Attention to detail and commitment to producing high-quality software.
  • Ability to prioritize tasks and manage time effectively using JIRA.
  • Experience with agile development methodologies (e.g., Scrum, Kanban).
  • Familiarity with DevOps practices and infrastructure as code (IaC).
  • Ability to conduct code reviews and provide constructive feedback.
  • Experience with performance tuning and optimization of applications.
  • Knowledge of microservices and event-driven architecture and containerization technologies (e.g., Docker, ECS, EKS) is a plus.
  • Experience with healthcare payer/PBM systems, clearinghouses, or pharmacy operations is a plus
Clearance Requirement:
  • US Citizenship with the ability to obtain and maintain a Public Trust clearance

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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