Software Developer – Full Stack (Internal Applications)

United Contractor Services, LLC; Kennesaw (GA); On-site; USD 90,000 - 130,000; Full time

Job summary

United Contractor Services in Kennesaw, GA is seeking a full-stack developer to design, build, and own internal software used across accounting, HR, IT, and operations. You’ll work end-to-end across the stack, from UI to database, with a focus on reliability, performance, and data integrity.

This on-site role requires strong problem-solving and collaboration with cross-functional teams. You’ll turn business requirements into scalable software, participate in architecture decisions, and help

Qualifications

• 3+ years of full-stack development across front end and back end.
• Experience with C#, Python, or JavaScript/Node.
• Proficient in HTML/CSS/JS and modern frameworks (React/Angular/Vue).
• Strong SQL and relational database design skills.
• Experience building REST/JSON APIs with OAuth or token-based auth.
• Git and standard development workflows; ability to own work end-to-end.

Responsibilities

• Design, build, and own internal web applications from UI to DB.
• Create relational schemas, efficient queries, and stored procedures.
• Develop and consume REST APIs and webhooks to connect internal apps.
• Keep code maintainable, tested, and reviewed with the team.
• Handle testing, deployment, monitoring, and data integrity.
• Document architecture, data models, and business rules.

Skills

Full-stack dev

C#, Python, JS

Frontend: HTML/CSS/JS

SQL/DB design

REST APIs/OAuth

Git workflows

On-site GA

Tools

Viewpoint Vista

Procore

ADP/Paylocity

Azure

Job description

About United Contractor Services

United Contractor Services is a national specialty contractor and one of the Top 50 Walls and Ceilings contractors in North America. Our project teams deliver commercial interior scopes, including metal framing, drywall, acoustical ceilings, EIFS, stucco, painting, and Division 8 and 10 Specialties, across multiple markets. Behind every job is a set of systems that keeps estimating, accounting, payroll, and project management moving. We're looking for a developer to make those systems work better.

The Opportunity

This is a full-time, in-office position based at our headquarters in Kennesaw, GA. You'll be the person who designs, builds, and stands behind the internal software our people use every day. That means working across the whole stack, from the screens a superintendent or accountant interacts with down to the database and the integrations underneath.

The key word is ownership. You won't be closing tickets someone else wrote. You'll sit down with the people doing the work, figure out what they really need, build it, ship it, and keep it running. When something breaks, it's yours to fix. When something could be better, it's yours to propose.

What You'll Do

Understand the Business Before Building

• Work directly with accounting, operations, HR, IT, and project teams to learn how their work actually gets done
• Find manual, repetitive processes that a purpose-built tool or automation could eliminate
• Turn what you hear into technical designs, data models, and realistic delivery plans

Build Across the Full Stack

• Develop internal web applications end to end: user interface, business logic, APIs, and database
• Design relational schemas and write efficient queries and stored procedures
• Create and consume REST APIs and webhooks that connect internal apps with our core platforms
• Keep code clean, testable, and maintainable, and take part in code reviews

Ship It and Keep It Running

• Handle testing, deployment, and monitoring for the applications you build
• Track down and fix bugs, slowdowns, and data integrity problems wherever they live in the stack
• Build in logging, alerts, validation, and error handling so issues get caught before users notice them

Set the Standards

• Document architecture, data models, field definitions, and business rules so others can follow your work
• Define practices for source control, API usage, authentication, and change management
• Make sure applications meet security, access control, and audit expectations

Keep Raising the Bar

• Research frameworks, third-party tools, and APIs that could speed up delivery
• Improve the performance, scalability, and maintainability of existing applications
• Bring ideas to leadership on your own initiative rather than waiting for direction

Systems You'll Work With

Our environment includes the following (not an exhaustive list):

• Viewpoint Vista (ERP) and Procore (project management), including their data and APIs
• ADP and Paylocity payroll and HR platforms
• Microsoft 365, Entra ID, Teams, Power Platform, and Azure
• ManageEngine ServiceDesk or Freshservice
• Internal web apps and dashboards serving both field and office teams

What You Bring

• 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
• Practical experience building and integrating REST/JSON APIs, including OAuth and token-based authentication
• Comfort with Git and standard development workflows
• A track record of turning business requirements into software people actually use
• Sharp troubleshooting skills and a habit of finding the root cause, not just the symptom
• The independence to own your work and the results that come from it
• Must be able to work on-site daily at our Kennesaw, GA office

Bonus Points

• Integration or reporting work with Viewpoint Vista, Procore, ADP, or Paylocity
• Development within the Microsoft ecosystem, such as Azure Functions, Power Platform, or Entra ID
• Experience with cloud hosting, CI/CD pipelines, or containers
• Power BI, SSRS, or other reporting and BI tools
• Background in construction or another project-driven industry

United Contractor Services is an Equal Opportunity Employer.

Drug Test and Background Disclaimer:

Candidates who receive a job offer will be required to undergo a drug test and background check in accordance with applicable laws. Providing false information may result in the withdrawal of a job offer or termination of employment. By submitting an application, candidates acknowledge and agree to these requirements.