We have the experience in this field about 4 years and we can do the requested service related to the Salesforce.
We are expert in doing the below services
1. Salesforce
2. VisualForce
3. Soql
4. Web Services
5. XML
6. SFTC
7. APEX
8. Salesforce API
9. Lightning Components
10. Lightning Web Components
11. SFDX
12. Aura