Web Application Developer

Genesis Health Clubs; Wichita (KS); On-site; USD 96,000 - 165,000; Full time

Job summary

Genesis Health Clubs in Wichita, KS is seeking a Contract Developer to rebuild our POS and inventory system. This on-site project spans about 60 days and focuses on transaction processing across multi-location clubs.

You will work on touch-first browser POS, inter-club transfers, and an offline-tolerant design using C#/.NET 8 MVC, SQL Server, REST APIs, and Git. Prior experience with transactional business software and AI-assisted development is highly valued.

Qualifications

• Production ASP.NET Core experience and strong T-SQL.
• Track record building transactional business software (POS/ERP).
• Comfort working with an existing schema from written specs.
• Fluency with AI-assisted development practices.

Responsibilities

• Develop touch-first browser POS features for club front desks and cafés.
• Support the multi-location inventory system with POs, transfers, and counts.
• Work with SQL Server, REST APIs, and on-prem IIS within existing architecture.

Skills

ASP.NET Core

T-SQL

POS/ERP systems

AI-assisted development

Tools

C# / .NET 8 MVC

SQL Server

REST APIs

Git

IIS on-prem

Responsive front end

Job description

Contract Developer — POS & Inventory (.NET 8)

60 day Short-term contract · Wichita, KS · Onsite

We run 87 fitness clubs across 14 states, and we build our own software. We're rebuilding our point of sale and inventory system, and we're looking for a contractor to help develop it.

The Work

Touch-first browser POS for club front desks and cafés — item lookup, split tender, charge-to-member-account, receipt printers, scanners, cash drawers, EMV terminals, shift close and drawer reconciliation.

Behind it, a real multi-location inventory system: purchase orders, receiving, inter-club transfers, cycle counts, reorder points, and shrink tracking.

Stack

C# / .NET 8 MVC, SQL Server, REST APIs, responsive front end, Git, IIS on-prem.

You Should Have

• Production ASP.NET Core experience and strong T-SQL.
• A track record building transactional business software — POS, checkout, order management, ERP, warehouse. Something where money and stock counts have to come out right.
• Comfort working against an existing schema you don't get to redesign, and from written specifications.
• Fluency with AI-assisted development. We work this way and expect you to keep pace.

Big Plus

• Card-present payment integration (EMV / P2PE).
• ESC/POS or OPOS peripheral work.
• Multi-location inventory — transfers, in-transit, per-site costing.
• Offline-tolerant application design.

Needed

Retail transaction software skils