Istanbul, Türkiye
I am a Senior Software Engineer specializing in building high-scale, resilient distributed systems within the Local Commerce domain. With more than 5 years of experience, I focus on transforming complex business requirements into maintainable technical architectures using Domain-Driven Design (DDD) and Event-Driven patterns. Throughout my career, I have demonstrated a strong commitment to operational excellence—whether it’s leading a massive re-platforming effort to reduce technical debt or architecting multi-datacenter solutions that ensure system reliability during critical outages. Core Areas of Expertise: - Cross-functional Collaboration: Orchestrated high-impact initiatives like the "Order Transfer" project, coordinating with 6+ teams to target a ~40% reduction in unsupplied order cancellations. - Architectural Evolution: Leading the transition from legacy systems to modern, decoupled architectures using DDD principles. - System Reliability: Designing robust Outbox Patterns and Multi-DC strategies to maintain 24/7 availability. - Security & Compliance: Driving large-scale security remediations in fast-paced, post-acquisition environments. - Technical Leadership: Mentoring engineers, establishing team standards through RFCs/ADRs, and fostering a culture of knowledge sharing through Tech Talks. I believe that great software is built on clear communication and pragmatic decision-making. I thrive in environments that challenge me to solve problems while helping those around me grow.
Impact Highlights: - Domain Re-platforming & Tech Debt Reduction: Spearheaded the re-platforming of the "Charge" domain using DDD principles, successfully reducing Sonar cognitive complexity from 1299 to a manageable 61. - High Availability Architecture: Designed and implemented a Multi-DC Outbox Pattern with event deduplication, which proved its resilience by maintaining system stability during major datacenter outages. - Security Leadership: Post-Uber acquisition, I led the security remediation efforts across 50+ projects, identifying and resolving 90% of critical and high-security vulnerabilities. - Cross-Functional Project Delivery: Orchestrated the "Order Transfer" feature by coordinating with 6+ different teams (Delivery, Promo, SPM, etc.), aiming to reduce unsupplied order cancellations by 40%. - Operational Excellence via GitOps: Established a GitOps-based configuration management system for Kafka Connectors, eliminating security risks associated with plaintext credentials and decentralized settings. - Technical Governance & Mentorship: Authored multiple RFCs and ADRs to standardize technical decision-making and served as a mentor to new team members to accelerate their onboarding and growth. - Knowledge Sharing: Represented the team in company-wide Tech Talks, presenting on topics such as Event Semantics, Messaging Standards, and Multi-AZ strategies.
Trendyol (Part of Alibaba Group) is the largest and fastest growing tech & commerce company in Turkey and in the MENA region. I'm working at Order Management System domain. What we do is creating orders and managing their lifecycles. • Developing microservices mostly based on Spring Boot with Java/Kotlin and GoLang. • For data management we are mainly using document based solutions such as Couchbase, Elasticsearch. • For message streaming we are using Kafka and RabbitMQ. • We are integrating and running our CI/CD pipelines with Gitlab. • We are deploying our applications to production on Kubernetes with docker containers. • We monitor our systems using Grafana, Newrelic and Kibana
Sahibinden.com is one of the largest classifieds sites with more than 62 million users and more than 500 million unique visits per month. I've worked at domain of publishing adverts and managing their lifecycles. • Developing web applications using Spring, JSP, MongoDB, MariaDB, Kotlin, Java • Some RESTful APIs for mobile clients • A/B testing for new features