Favorite place to hire contract developers for algorithmic trading?

The title mostly explains my question.

I am familiar with programming and just created a basic algorithmic strategy utilizing Pinescript, my problem stems from my lack of years programming. The strategy is in place and has allowed me to take profitable trades, the problem stems from faulty / "dumb" logic. Sometimes the algorithm misses out on long / short signals due to logic. other times it creates too many signals due to its look-back consideration.

What are some reputable sites to hire contractor developers?

What is your advice for sheltering the code from developers who fail to the job and run off with the idea?

Thanks in advance!