PostgreSQL, Kafka, Redis, Concurrency, Memory Management, Docker, Distributed Systems, Kubernetes, Asynchronous processing, Message queues, ClickHouse, Go, Microservice architectures, TimescaleDB, Redpanda, Cloud-native applications, Event-driven architectures

Java, Rust, Kotlin, Encryption, private key handling, production-grade software development, transaction flows, wallets, blockchain infrastructure, key management, object-oriented design, secure system design, operational controls, signing

PostgreSQL, Prometheus, Kafka, Spring Boot, API design, Grafana, JUnit, Docker, Openshift, Oracle, Azure DevOps, Redis, Spring Cloud, Jenkins, Mockito, Distributed Systems, MongoDB, Kubernetes, Java 11, Testcontainers, Microservices architecture, GitHub Actions, OpenTelemetry, GitLab CI

Performance Tuning, template programming, memory pool, distributed PS systems, thread pool, high-performance in-memory KV systems, high-performance client-server architecture systems, RPC frameworks, multi-threaded programming, GDB debugging, distributed system backend optimization, KV storage systems based on NVMe-SSD

PostgreSQL, Kafka, Restful Apis, Go, GRPC