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We are looking for a highly skilled Senior C# Developer with strong experience in Point-of-Sale (POS) systems, payment gateway integrations, and backend application development. The ideal candidate should have hands‑on experience working with POS vendor APIs, building scalable desktop or web‑based applications, and developing reliable transaction workflows within retail or healthcare environments. This role requires strong technical expertise, problem‑solving skills, and the ability to communicate effectively within a collaborative development environment.