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I will build a custom web app or internal business tool
Justin G
About this gig
Need a small custom web app or internal business tool for a specific task? I build focused browser-based tools in TypeScript, such as a calculator, a data-entry workflow or a simple dashboard.
CHOOSE YOUR SCOPE
Basic: 1 responsive screen and 1 input-to-result workflow.
Standard: up to 3 screens, 1 workflow and simple data storage.
Premium: up to 5 screens, 2 workflows and simple data storage.
All packages include source code, a working preview and the stated revisions. One workflow means an agreed sequence: the user enters information, the tool processes it and displays a result. We define the inputs and expected output before work starts.
QuizTower is my own web product and portfolio reference.
Please send your goal, workflow steps, example inputs and outputs, user roles and any design references. Third-party APIs, payments, complex integrations, sensitive-data handling, advanced security, hosting and native mobile apps need a separate scope.
Message me with your idea so I can confirm feasibility and the right package before you order.
Get to know Justin G
Justin G
Websites, Web Apps, Tools and Product Concepts
- FromAustria
- Member sinceMay 2022
Languages
English, German
I plan and build websites, browser-based web apps and practical tools. I turn ideas into clear concepts, user flows and working prototypes, and improve existing products with focused fixes. QuizTower, my own multiplayer quiz project since October 2025, is my portfolio reference. I previously led a fundraising team for an NGO. Since May 2022, I have worked in insurance sales and team leadership, personally supporting around 890 clients within a team portfolio of over 2,000. I also mentor trainees. This background helps me clarify requirements, communicate clearly and keep projects practical.
My Portfolio
Other Software Development Services I Offer
FAQ
Can you connect the tool to my existing system?
Possibly. Please message me with the system, API documentation and exact data flow first. Integrations are quoted separately because complexity and access requirements vary.
What counts as one workflow?
One agreed sequence with a defined input and result, such as entering values and receiving a calculation. Separate user tasks, extra screens, logins and external integrations are not automatically included. We confirm the exact scope before the order.
Will I receive the source code and hosting?
Source code and a working preview are included in all packages. Hosting, domain names and third-party subscription fees are not included. If you need deployment, we will agree on the target platform, access and any extra scope before ordering.
