Our development experience spans enterprise payment gateways, 3-D Secure server modules certified by EMVCo, Visa, Mastercard, and Amex, Apple Pay and Google Pay PSP integrations, POS communication solutions built on Elixir/OTP and BEAM, native Android and iOS applications, hotel reservation systems, e-commerce integrations, and document management platforms. We write clean, maintainable code using PostgreSQL, JPA/Hibernate, Gradle, Maven, Docker, and Kubernetes, with CI/CD pipelines in GitLab. Every project follows version control best practices, code review processes, and automated testing.