A versatile developer with 7 years of experience, specializing in maintaining and optimizing the Bitcastle.io system. Proficient in a variety of programming languages including JavaScript, Node.js, Java, PHP, and Flutter, allowing for robust application development across platforms. Experienced in operating systems such as Windows and Linux, with a strong background in cloud computing services, including AWS (S3, EC2), Docker, and Kubernetes. Skilled in database management with MySQL, MongoDB, and Redis cache, ensuring efficient data handling and performance. Knowledgeable in message queue technologies like Kafka and adept at building APIs using RESTful, gRPC, MQTT, and WebSocket protocols. Committed to delivering high-quality software solutions and optimizing system performance in a dynamic environment.