Software Engineer – Go (Golang)

CONCEPT SOLUTIONS LLC•Reston, VA

17h•$130,000 - $150,000•Hybrid

About The Position

Concept Solutions, LLC (CS) is seeking a Software Engineer – Go (Golang) to support a mission-critical application modernization program for a Department of War (DoW) customer. This program focuses on simplifying access across a portfolio of production applications by creating a unified platform with single sign-on, a shared user interface, and a standardized approach to application integration. The Software Engineer will play an important role in maintaining and enhancing existing applications while supporting the transition to a more integrated platform. This position is ideal for a backend engineer who enjoys solving complex problems, working with established codebases, and ensuring production systems remain reliable and secure.

Requirements

3+ years of backend software engineering experience, including production development using Go (Golang) and SQL.
Demonstrated ability to troubleshoot, maintain, and enhance existing production applications.
Experience working with unfamiliar or complex codebases and implementing changes safely.

Nice To Haves

Experience with Amazon ECS or Kubernetes.
Familiarity with AWS GovCloud environments.
Active Secret security clearance.
Eligibility for a Tier 5 background investigation.

Responsibilities

Troubleshoot and resolve software defects in production applications built with Go (Golang), React/TypeScript, and PostgreSQL.
Develop, test, and implement software patches and enhancements in accordance with the customer's release schedule.
Maintain and improve automated tests to protect existing application functionality.
Analyze unfamiliar codebases and implement changes safely without disrupting production operations.
Maintain technical documentation, operational procedures, and system runbooks.
Participate in an on-call support rotation following onboarding.