Best visa requirement checker for developers

The visa compliance space has roughly 15-25 consumer-facing tools, but almost none address developer-specific workflows like visa sponsorship timelines, tax implications for contract work, or which countries let you work remotely for US companies without local registration. The common failures are brutal: tools are either outdated (visa rules change constantly), geographically incomplete, or require you to call an immigration lawyer for nuanced questions like "can I code for a US startup while on a tourist visa in Portugal?" The real gap isn't in general visa info—it's in the friction layer between developer intent and compliance reality. A vibecoder needs answers to developer-specific questions: Which countries have the fastest visa turnaround for tech talent? Which ones don't tax remote income? Can you legally do contract work, or only employment? Existing tools treat all professions the same. The opportunity sits in building a developer-first layer on top of visa data—combining real-time immigration rules with tech hiring patterns, tax treaties, and peer community feedback on what actually works. A new shipper should focus on three countries at launch (probably Portugal, Mexico, and Singapore) with obsessive accuracy, then expand with a community validation loop where developers flag outdated info.