Sr. Software Engineer

Addison Group • $100K — $130K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 6-10 years of professional software development experience.
  • Strong skills in C#, .NET Core, and JavaScript.
  • 5+ years writing SQL for SQL Server or similar relational databases.
  • Experience designing complex application architecture.
  • Familiar with legacy ASP.NET and PostgreSQL.
  • Proficient with AWS, particularly ECS and containerization.
  • Strong troubleshooting and collaboration abilities.

Responsibilities

  • Design software solutions aligned with business needs.
  • Develop, test, and review code with established practices.
  • Integrate internal applications with third-party services.
  • Diagnose and resolve complex application issues.
  • Enhance systems to meet evolving operational requirements.
  • Mentor junior developers and collaborate on technical designs.
  • Document architectural decisions, workflows, and system designs.

Benefits

  • Eligible for medical, dental, and vision insurance.
  • 401(k) retirement plan.
Full Job Description
Job Title: Senior Software Developer

Location (city, state): Arlington, TX

Assignment Type: Direct hire

Pay: $100,000-$130,000 annually, plus a target 10% bonus

Work Schedule: On-site Monday through Thursday; remote Friday

Benefits: This position is eligible for medical, dental, vision, and 401(k).

We are seeking a Senior Software Developer to design, build, and improve complex applications. This is a hands-on technical leadership role for someone who enjoys writing code, shaping architecture, solving production problems, and helping other developers grow. The position has no direct reports.

Key Responsibilities:
  • Design software solutions that meet business needs and can evolve over time.
  • Develop, test, and review code using established engineering practices.
  • Connect internal applications with third-party systems and services.
  • Diagnose difficult application issues and resolve production incidents.
  • Improve existing systems to support changing operational needs.
  • Partner with developers on technical designs and mentor less-experienced team members.
  • Document system architecture, workflows, and key technical decisions.
  • Work with cross-functional stakeholders to plan and deliver application updates.

Qualifications:
  • Approximately 6-10 years of professional software development experience.
  • Strong development experience with C#, .NET Core, and JavaScript.
  • At least five years of experience writing SQL for SQL Server or another relational database.
  • Experience designing the architecture of complex applications and guiding technical decisions.
  • Familiarity with legacy ASP.NET applications and PostgreSQL.
  • Experience with AWS, including ECS and containerized applications.
  • Ability to review code, troubleshoot complex issues, and collaborate effectively with other developers.
  • A degree or certification is welcome; demonstrated professional experience is the priority.

Additional Details:

This role works alongside senior and mid-level developers on a seven-person team. The interview process is expected to include an initial video conversation, an on-site technical discussion, and a final culture conversation.

About Addison Group

Addison Group is a professional staffing and consulting firm that provides services in the areas of information technology, finance and accounting, healthcare, human resources, and administration. The company was founded in 1999 and is headquartered in Chicago, Illinois. Addison Group has over 2500 employees and operates in 22 locations across the United States. The company has been recognized as one of the fastest-growing private staffing firms in the United States by Inc. Magazine.
Learn more about Addison Group
Size
2,500 employees
Industry
Founded
1999

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