The API layer have become the backbone of modern applications, and that makes them where attackers concentrate. Authentication alone does not secure an API. Authorisation needs verifying on every request, because BOLA continues to be among the most exploited flaws. Request throttling and schema validation address the bulk of what is left.
Any modern codebase are assembled more than they are written. Third-party packages make up most of a typical codebase. Each dependency introduces the risk profile of its maintainers. Effective measures include locking versions, regular dependency audits and reviewing what a package actually does prior to use.
Software designed for high bandwidth environments often fails on
constrained networks. Building for constrained networks involves local caching and sync,
minimising transferred data along with graceful degradation. What this produces benefits users everywhere, rather than merely constrained markets.

Choosing a software studio largely decides much more than cost and
LosBebesInc.com dates. Establish how they approach security: whether threat modeling happens or security is an afterthought. Establish who owns the code together with the process when the project ends. Proper handover documentation represents considerably more than the lowest quote.
The majority of vulnerabilities trace back to design decisions rather than coding mistakes. Structured threat modeling forces teams to ask four basic questions at design stage: what are we building, what can go wrong, what controls apply and finally how do we verify. Bolting security on later proves far more than building it in from the start.