Java Backend Developer Expert

Core Backend DevelopmentStrong expertise in designing and building RESTful APIs using Java Spring Boot.Proven experience with Java 8+ (Streams, Lambdas, Optional, Functional Programming).Deep understanding of software design patterns and microservices architecture.Messaging & Event-driven SystemsHands-on experience with Kafka and/or RabbitMQ.Database & Data ManagementProficient in Oracle and PostgreSQL databases.Strong understanding of SQL optimization and transaction management.Caching & PerformanceExperience with Redis and caching strategies.Proven experience building high-performance backend systems processing billions of transactions/month.Monitoring & LoggingExperience with ELK stack (Elasticsearch, Logstash, Kibana).Familiarity with Prometheus and Grafana.Cloud-native DevelopmentExperience with cloud platforms (AWS preferred).Familiarity with 12-Factor App principles.Development PracticesSolid understanding of secure development practices.Proficient in Agile methodologies, Unit Testing, CI/CD pipelines.Soft SkillsStrong communication and collaboration abilities.Team-oriented mindset; ability to mentor and support fellow engineers.Nice to HaveExperience working in the banking / financial services domain.Background working with core card systems (credit card, debit card platforms).Experience collaborating with international card payment organizations (Visa, Mastercard, JCB, UnionPay).Experience working in a product development environment (building long-lived product lines).Hands-on experience with Load Testing tools: JMeter, JProfiler, Locust, k6.Familiarity with regulatory compliance and security standards in financial systems.Experience working with NoSQL databases such as MongoDB or Cassandra.Experience applying AI-powered tools and techniques to enhance productivity and accelerate project delivery.