Sr. Software Engineer

Addison Group; Dallas (TX); Hybrid; USD 100,000 - 130,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k)

Job summary

Addison Group is seeking a Senior Software Developer in Arlington, TX to design, build, and improve complex applications. This hands-on leadership role focuses on coding, shaping architecture, solving production problems, and mentoring peers without direct reports.

The ideal candidate has 6–10 years of software development experience and strong skills in C#, .NET Core, JavaScript, SQL, and AWS. On-site work Mon-Thu with remote Friday; competitive pay and benefits included.

Qualifications

• 6–10 years of professional software development experience.
• Strong C#, .NET Core, and JavaScript skills.
• At least five years of SQL experience with SQL Server or equivalent.
• Experience designing complex architectures and guiding technical decisions.
• Familiarity with legacy ASP.NET and PostgreSQL.
• Experience with AWS, ECS, and containerized applications.
• Ability to review code and collaborate effectively with other developers.
• Degree or certification welcome; priority is demonstrated experience.

Responsibilities

• Design software solutions meeting business needs and scalable for the future.
• 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 for 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.

Skills

C#

.NET Core

JavaScript

SQL

AWS

PostgreSQL

ASP.NET

Architecture design

Code review

Mentoring

Tools

AWS ECS

SQL Server

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.