On-Site Full-Stack Dev for Internal Systems

United Contractor Services, LLC; Kennesaw (GA); On-site; USD 85,000 - 120,000; Full time

Job summary

United Contractor Services, LLC seeks a full-time software developer to design, build, and support internal systems used across accounting, operations, IT, HR, and project management. You will work across the full stack, from UI to database, collaborating with business teams to deliver automated, scalable solutions.

You will own the work end-to-end, propose improvements, and ensure security, data integrity, and maintainability while operating on-site at our Kennesaw, GA headquarters.

Qualifications

• At least 3 years of professional development experience covering both front end and back end.
• Solid skills in one or more back-end languages such as C#, Python, or JavaScript/Node.
• Front-end skills in HTML, CSS, and JavaScript, plus experience with a modern framework like React, Angular, or Vue.
• Strong SQL and relational database design ability.
• Experience building and integrating REST/JSON APIs, including OAuth and token-based authentication.
• Comfort with Git and standard development workflows.
• Ability to turn business requirements into usable software.
• Must be able to work on-site daily at our Kennesaw, GA office.

Responsibilities

• Design, build, and maintain internal software across the stack for operations and administration.
• Collaborate with accounting, operations, HR, IT, and project teams to understand workflows.
• Develop internal web applications end-to-end: UI, business logic, APIs, database.
• Create and optimize relational schemas and queries; implement data models.
• Build and consume REST APIs and webhooks to integrate core platforms.
• Ensure code quality through tests, reviews, and maintainability.

Skills

Full-stack development

Backend languages (C#, Python, JS/Node

Tools

Viewpoint Vista

Procore

ADP

Paylocity

Microsoft 365

Entra ID

Azure

Git workflows

REST APIs

CI/CD

Job description

United Contractor Services, LLC seeks a full-time software developer to design, build, and support internal systems used across accounting, operations, IT, HR, and project management. You will work across the full stack, from UI to database, collaborating with business teams to deliver automated, scalable solutions.

You will own the work end-to-end, propose improvements, and ensure security, data integrity, and maintainability while operating on-site at our Kennesaw, GA headquarters.