03/12/2026 updated
100 % available
Senior Backend Engineer - Java & Distributed Systems Specialist
Ankara, Turkey
Only remote
Master of Science (Honors) - Information and Media TechnologiesAbout me
Senior Backend Engineer designing scalable, high-availability distributed systems across banking, telecom, insurance, healthcare, and public sector domains. Specialized in Java, Spring Boot, RESTful API development, microservices architecture, and enterprise integrations.
Java (Programming Language)Application Programming Interfaces (APIs)Amazon Web ServicesArchitectureCloud ComputingDatabasesContinuous IntegrationCorporate SecurityDevOpsDistributed SystemsIdentity ManagementPostgreSQLMySQLOracle ApplicationsPerformance Tuning
Backend Architecture & Microservices
Expertise in designing scalable, high-availability distributed systems and modernizing monolithic systems into cloud-ready microservices architectures with enterprise integration capabilities.
Java & Spring Boot Development
Advanced proficiency in Java programming with extensive experience in Spring Boot framework for building RESTful APIs, enterprise workflow services, and production-grade backend solutions.
Database Architecture & Performance Optimization
Comprehensive knowledge in Oracle, PostgreSQL, and MySQL database systems with expertise in performance optimization, query tuning, and database migration strategies.
Cloud & DevOps Technologies
Experience with AWS cloud services, Docker containerization, Kubernetes orchestration, and CI/CD pipeline implementation for scalable deployment solutions.
API Lifecycle Management
Proficiency in REST API development, WSO2 API Manager, API security best practices, and full lifecycle management including design, testing, versioning, and deployment.
Monitoring & Observability
Implementation of comprehensive monitoring solutions using Grafana, Prometheus, and ELK Stack for operational visibility and system reliability improvement.
Enterprise Integration Patterns
Expertise in SOA-based enterprise integrations, TIBCO BusinessWorks, message-driven architectures, and enterprise service bus implementations.
Security & Identity Management
Implementation of secure authentication systems using JWT, Keycloak integration, API security best practices, and compliance with enterprise security standards.
Expertise in designing scalable, high-availability distributed systems and modernizing monolithic systems into cloud-ready microservices architectures with enterprise integration capabilities.
Java & Spring Boot Development
Advanced proficiency in Java programming with extensive experience in Spring Boot framework for building RESTful APIs, enterprise workflow services, and production-grade backend solutions.
Database Architecture & Performance Optimization
Comprehensive knowledge in Oracle, PostgreSQL, and MySQL database systems with expertise in performance optimization, query tuning, and database migration strategies.
Cloud & DevOps Technologies
Experience with AWS cloud services, Docker containerization, Kubernetes orchestration, and CI/CD pipeline implementation for scalable deployment solutions.
API Lifecycle Management
Proficiency in REST API development, WSO2 API Manager, API security best practices, and full lifecycle management including design, testing, versioning, and deployment.
Monitoring & Observability
Implementation of comprehensive monitoring solutions using Grafana, Prometheus, and ELK Stack for operational visibility and system reliability improvement.
Enterprise Integration Patterns
Expertise in SOA-based enterprise integrations, TIBCO BusinessWorks, message-driven architectures, and enterprise service bus implementations.
Security & Identity Management
Implementation of secure authentication systems using JWT, Keycloak integration, API security best practices, and compliance with enterprise security standards.
Experience
Professional experience10+ years
Freelancer since2024
Languages
GermanGoodEnglishFluentTurkishNative speaker
Project history
Led backend development for ERP modules supporting nationwide forestry operations, designed scalable RESTful APIs and enterprise workflow services, optimized Oracle PL/SQL queries and database performance for reporting systems.
Led technical mentoring program for junior and mid-level engineers focusing on backend architecture and system design, designed and developed cryptocurrency wallet prototypes using React.js, Node.js, and Spring Boot.
Designed and delivered 60+ production-grade REST APIs enabling secure bank-to-insurance integrations, architected backend services using Spring Boot within distributed microservices architecture.