PopUp Mainframe Ltd was incorporated in October 2021 and is listed as an active private limited company on Companies House (registration number 13661957). Its registered address is care of Flb Accountants LLP in Wokingham, a common arrangement for smaller companies that do not maintain a separate office. The company's primary SIC code is 62012, covering business and domestic software development, so its work likely involves building, maintaining or customising software for corporate or consumer clients. No public-facing website or detailed business description has been verified, so the exact product range and client base are unclear. The company holds a Skilled Worker sponsor licence with an A rating under the Worker route, meaning it is authorised to hire non-UK residents who need visa sponsorship. This is a practical indicator that PopUp Mainframe Ltd is, or intends to be, an employer of skilled international staff in the UK. The licence itself suggests some level of hiring activity or at least a formal commitment to the sponsorship process. Given its recent incorporation and the use of an accountant's address, it likely operates as a small enterprise, perhaps with a handful of employees. For a software developer, day-to-day work might involve coding, testing, and deployment of software solutions, but without more evidence, details about its specific technology stack, sectors served, or project history remain unknown. Job seekers researching this company should note that while the sponsor licence is a positive sign, the company's size and market presence are not yet clear from public records.

PopUp Mainframe Ltd was incorporated in October 2021 and is listed as an active private limited company on Companies House (registration number 13661957). Its registered address is care of Flb Accountants LLP in Wokingham, a common arrangement for smaller companies that do not maintain a separate office. The company's primary SIC code is 62012, covering business and domestic software development, so its work likely involves building, maintaining or customising software for corporate or consumer clients. No public-facing website or detailed business description has been verified, so the exact product range and client base are unclear. The company holds a Skilled Worker sponsor licence with an A rating under the Worker route, meaning it is authorised to hire non-UK residents who need visa sponsorship. This is a practical indicator that PopUp Mainframe Ltd is, or intends to be, an employer of skilled international staff in the UK. The licence itself suggests some level of hiring activity or at least a formal commitment to the sponsorship process. Given its recent incorporation and the use of an accountant's address, it likely operates as a small enterprise, perhaps with a handful of employees. For a software developer, day-to-day work might involve coding, testing, and deployment of software solutions, but without more evidence, details about its specific technology stack, sectors served, or project history remain unknown. Job seekers researching this company should note that while the sponsor licence is a positive sign, the company's size and market presence are not yet clear from public records.