Here's a refined version of your job posting:
Description:
We are looking for a skilled freelancer with expertise in 8051 micro controllers to configure a Pulse Width Modulation (PWM) output pin for our project. The micro controller in use is the STC8H1K08, and the coding is being done in Keil u Vision.

We have the necessary hardware setup to test your code and ensure functionality. Payment will be made upon completion and successful testing of the code.

Requirements:

    Proven experience with 8051 micro controllers.
    Familiarity with PWM configuration and its implementation.
    Proficiency in Keil u Vision IDE.
    Understanding of the STC8H1K08 micro controller's architecture and features.
    Strong debugging and troubleshooting skills.

Project Scope:

    Configure a PWM output pin on the STC8H1K08 micro controller.
    Provide clear and functional code, optimized for the task.
    Assist with debugging if the code does not work as expected during testing.

If you have hands-on experience with 8051 micro controllers and are confident in delivering reliable code for this task, we'd love to hear from you! Please include details of your past experience with similar projects in your proposal.

Let me know if you'd like to make any changes!