Lightning development, Web Development, Apex, Visualforce Lightning development - during recent years, we apply only the Lightning approach, building custom apps using Lightning Web Components and Lightning Components. Also, we are very strong at APEX. We worked with both synchronous and asynchronous apex, batches, integrations with external systems through APEX (REST and SOAP), custom triggers, creation of custom APIs. In terms of Visualforce, we worked a lot with it before, but now we are very focused on LWC. We had projects with different levels of complexity and experience with Sites.com using Visualforce. Moreover, we had experience in the development of Angular and React single-page applications that were hosted on Salesforce within the Visualforce page.