Özgür E.

Senior Software Developer

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Hamburg, Germany

Experience

Nov 2023 - Dec 2024
1 year 2 months

Senior Software Developer

Cubic Transportation Systems

  • Designed, implemented, and deployed two new microservice components, enabling new business functionalities and supporting regulatory compliance for enterprise clients.
  • Ensured business continuity and system reliability within a high-transaction, microservice-based environment, taking ownership of backend systems under dynamic business conditions.
  • Identified and refactored inefficient implementations, applying cost-benefit analysis to optimize performance, maintainability, and code quality.
Oct 2019 - Nov 2023
4 years 2 months

Technical Team Lead

Descartes Systems Group

  • Contributed actively to the development team, evolved the MVP into a highly transactional, horizontally scalable system, resulting in the acquisition of 20+ new B2B customers and a 100× increase in transaction throughput while maintaining 99.99% uptime.
  • Evaluated and enhanced existing enterprise logistics applications to align with evolving technical and business requirements, improving overall stability and performance.
  • Applied concurrency and multithreading techniques to improve system performance and throughput under heavy workloads.
  • Strengthened code quality by implementing design patterns, enforcing test automation, and applying Clean Code standards across the development lifecycle.
Apr 2019 - Jul 2019
4 months

Senior Software Developer

Moebel.de

  • Developed and optimized 12 backend microservices hosted on AWS for invoicing, tracking, and performance analytics, to improve user experience and operational transparency.
Jul 2016 - Apr 2019
2 years 10 months

Technical Project Manager

Citi Group

  • Directed the implementation of the test automation framework for Electronic Fund Transfer services, reducing operational costs and manual workload by 1,000 man-days annually, while improving transaction reliability and software quality.
  • Managed end-to-end delivery of multiple digital banking projects by coordinating cross-functional teams across regions to ensure on-time, compliant, and high-quality releases.
  • Bridged business and technology teams, translating strategic requirements into actionable technical roadmaps, overseeing vendor collaboration, and ensuring architectural alignment with global Citi standards.
  • Oversaw project lifecycle governance including planning, risk management, and stakeholder reporting, ensuring all digital transformation initiatives met cost, quality, and compliance objectives across multiple regions.
Sep 2012 - Jul 2016
3 years 11 months

Senior Software Developer

Multinet

  • Contributed to the modernization of the MVP product into a scalable, high-performance payment service provider platform, aligning development efforts with new business strategies and enabling a wider merchant base, which increased transaction volume to 3M TL per day.
  • Developed WebPOS, a new payment application improving user experience and operational efficiency in financial transaction processing, significantly reducing field service, logistics, and hardware maintenance costs; the project was nominated as “Most Innovative Software Product of 2014” by TESID.
Aug 2009 - Sep 2012
3 years 2 months

Senior Software Developer

Yurtici Kargo - DPD

  • Designed and implemented a new automated reporting platform transforming manual report generation into a real-time, scheduled, and data-driven architecture that improved executive decision-making and delivered measurable business value across the organization.
  • Maintained and enhanced mission-critical logistics software processing millions of daily transactions.
Apr 2004 - Aug 2009
5 years 5 months

Technical Team Lead

Isdemir

  • Developed and deployed core production and warehouse management modules across multiple plants.
  • Migrated legacy systems into new enterprise platforms, improving performance and process transparency.

Summary

Highly skilled Senior Software Developer with extensive experience in building enterprise-grade Java applications using Spring Boot, Microservices, and AWS. Specialized in scalable backend architectures, performance optimization, and secure system integration across finance, logistics, and e-commerce domains. Proficient in applying Clean Code, CI/CD, and test automation practices to deliver maintainable, high-quality software in Agile enterprise environments.

Skills

  • Java (11–17), Spring Boot, Hibernate Microservices, Restful Apis, Event-driven Systems
  • Junit, Mockito, Testng Version Control, Git. Subversion
  • Postgresql, Oracle Db, Mysql, Mssql, Mongodb Design Patterns. Clean Code, Solid, Kiss, Yagni
  • Intellij Idea, Jira, Confluence Code Review, Code Refactoring
  • Performance Optimization & Scalability Test Automation, Ci/cd Pipelines
  • Devops Colloboration Scrum And Agile Mindset

Languages

Turkish
Native
German
Advanced
English
Advanced

Education

Oct 2005 - Jun 2007

Çukurova University

M.Sc. in Engineering and Technology Management · Engineering and Technology Management · Adana, Turkey

Oct 1999 - Jun 2003

İzmir Institute of Technology

B.Sc. in Computer Engineering · Computer Engineering · İzmir, Turkey

Certifications & licenses

PMP (Project Management Professional)

PMI

Solutions Architect

Global Dev Experts

Solutions Architect Associate

AWS

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