Kotlin/Java Developer (Integration)

Our team is developing a payment gateway for accepting funds from users on behalf of merchants, as well as sending funds from merchants to users. The system involves storing user payment data and is subject to PCI DSS compliance. It contains multiple integrations with payment systems, providers, and other gateways and processors, including 3DS. Job Responsibilities Developing new payment integrations and services; Automating and optimizing integration processes; Analyzing external provider documentation, conducting rapid checks, and defining epics and tasks based on Proof of Concept; Participating in the design and development of high-load system architectures; Supporting and improving existing solutions and services; Writing high-quality, test-covered code (unit tests, integration tests); Conducting code reviews; Optimizing system performance and database queries; Analyzing and resolving production incidents and bugs; Processing and resolving requests from technical support and users as part of daily duties; Collaborating with the QA team to ensure the high quality of delivered products; Using AI-tools to accelerate delivery of integration modules and creating internal tools to generate integration code from business requirements; Maintaining technical documentation and writing technical specifications; Assisting in onboarding new developers and ensuring code quality; Definition and formation of technical epics — analyzing existing solutions, identifying opportunities to imp