@Tayyaba, is @Nauman_Qaiser your friend: Please Rate My General Profile for Stage1 (Advice Required)
Is this his primary source of revenue?
His technical background looks strong. He is a technical applicant and works with technology organisations directly. He is self-employed, not an employee of an outsourcing company, nor doing the projects for outsourcing/consulting companies.
Therefore, I believe he is eligible.
He has to choose the most extensive and prolonged projects completed for technology companies with his most significant contributions and innovations (If he decides to support OC1 and OC3 criteria, for example) and complete the application from a project-based perspective and according to the Tech Nation Guide.
Especially pay attention to Letters of Recommendations (product-driven tech companies), CV (project-based resume) and Personal Statement (plans in the UK, why you can’t keep freelancing outside the UK).
Best wishes,
Savva.