Senior Java Software Engineer

Role Overview We are hiring an experienced Senior Software Engineer to design, build and maintain high-performance, secure Java back-end systems for a large-scale digital services platform. You will work end-to-end – from solution design through implementation, testing and production support – collaborating with product managers and cross-functional teams to deliver reliable, scalable services and well-designed APIs. Work Location: Sharjah Experience: 8+ Years Notice Period: Immediate to 30 Days UAE based candidates only Key Responsibilities • Design and develop high-performance, scalable back-end systems and effective APIs. • Build and maintain well-functioning databases and applications. • Implement security and data-protection controls across services. • Write clean, maintainable, well-tested code; debug and resolve production issues. • Produce clear technical documentation and participate in code reviews. • Communicate with stakeholders and service providers to align technical requirements. • Stay current with tools and practices to continuously improve the back-end platform. Essential Requirements (Must-Have) Education & experience • Bachelor’s or Master’s degree in Computer Science or a related field. • 5+ years’ hands-on software engineering experience at a senior level. • Strong CS fundamentals: algorithms, data structures, OOP, design patterns, software architecture, database design and UML. Core backend • Java (11+) and Spring Boot – current, hands-on, build-level experience (not architecture/oversight only). • Oracle Database – SQL and PL/SQL, indexing, query tuning and reading execution plans. • REST and SOAP web services – designing and consuming both. • API security – JWT (access vs refresh tokens), Spring Security, and OAuth2 / OIDC. • Oracle WebLogic and Apache Tomcat – deployment, tuning and troubleshooting on application servers. Distributed systems, messaging & resilience (primary assessment area) • Apache Kafka or RabbitMQ and event-driven architecture. • Transactional outbox pattern for save-and-publish consistency. • Idempotent consumers and duplicate-message handling (unique key + de-duplication). • Resilience patterns – circuit breaker, retry with back-off, fallback, bulkhead and rate limiting (e.g. Resilience4j). • Distributed locking for scheduled jobs across multiple instances/pods (e.g. ShedLock, Redis or leader election). • SOA and microservices architecture; awareness of CQRS. Performance & concurrency • Diagnosing latency when CPU is low (thread- and connection-pool exhaustion, GC, blocking I/O). • Query optimisation, avoiding full table scans, and resolving the N+1 problem (fetch join, entity graph, batching). • Optimistic vs pessimistic locking and handling race conditions. • Memory-leak diagnosis using heap dumps and profilers Show more Show less

Bachelor’s or Master’s degree in Computer Science or a related field. 5+ years’ hands-on software engineering experience at a senior level. Strong CS fundamentals: algorithms, data structures, OOP, design patterns, software architecture, database design and UML.

Design and develop high-performance, scalable back-end systems and effective APIs. Build and maintain well-functioning databases and applications. Implement security and data-protection controls across services. Write clean, maintainable, well-tested code; debug and resolve production issues. Produce clear technical documentation and participate in code reviews. Communicate with stakeholders and service providers to align technical requirements. Stay current with tools and practices to continuously improve the back-end platform.