Trading platform is a much more advanced application than a mere strategy. In contrast to strategy, a trading platform may include such features as advanced GUI, extended order management, back-test capabilities, support for specific/multiple brokers and data providers, custom charting and reporting
NinjaTrader is a platform, eSignal is a platform, MultiCharts and TradeStation are also trading platforms. Of course, building something like those ones would require literally million(s) of dollars. Nevertheless building a very lite, tailored for your specific needs version is possible.
If you are a small/medium business then a bare strategy may feel too limited for you. You may need an all-inclusive solution that would combine multiple concepts like trading, back-testing, reporting, charting into a single application.
We would be happy to offer you such service. Please note that such projects may require months of development and a suitable budget.
Here is the list of possible features for your trading platform: