- Technical leadership for the next generation Payments System architecture to be more scalable, and event driven towards the goal of building Payments System components as decoupled microservices.- Scaling the team; not only increasing the head count (to ¨~30 engineers), but also lifting up people and building internal engineering leaders to run as multiple agile sub-squads. In the end, great teams are led by the players!- Scaled the “Payments Team” to “Risk & Payments Portfolio”… Show more - Technical leadership for the next generation Payments System architecture to be more scalable, and event driven towards the goal of building Payments System components as decoupled microservices.- Scaling the team; not only increasing the head count (to ¨~30 engineers), but also lifting up people and building internal engineering leaders to run as multiple agile sub-squads. In the end, great teams are led by the players!- Scaled the “Payments Team” to “Risk & Payments Portfolio” including ~30 engineers under 3 multi-culture & distributed teams located in Dublin and Ankara, running as ~10 parallel and autonomous pods.[Microservices, Kotlin, Spring Boot, Kafka, Celery, MySQL, DynamoDB] Show less

- Led Udemy Payments Team of highly skilled engineers in a fast-paced environment, successfully delivering high impact projects while nurturing their growth and advancing their careers.- Technical lead for multiple robust and scalable product features and engineering excellence projects concurrently. Full stack development, end-to-end delivery, each deployment mission critical with no-downtime requirement.- Collaborated with stakeholders, product managers and designers to ensure team… Show more - Led Udemy Payments Team of highly skilled engineers in a fast-paced environment, successfully delivering high impact projects while nurturing their growth and advancing their careers.- Technical lead for multiple robust and scalable product features and engineering excellence projects concurrently. Full stack development, end-to-end delivery, each deployment mission critical with no-downtime requirement.- Collaborated with stakeholders, product managers and designers to ensure team focus on highest ROI projects while maintaining tech debt with quality first and innovative approach.- Technical leadership to scale the Payments System international availability - from 2 methods (credit cards &PayPal) to 16 payment methods localized for 249 countries.[Python, Django, Celery, MySQL, Redshift, ElasticSearch, DataDog, Sentry, PagerDuty] Show less

Full-stack engineering at Payments system. Enabling multi-currency & multi-gateway payments experience at scale.- Quick engagement to existing codebase which has been implemented in PHP.- Made various fixes/improvements on Stripe & PayPal integrations, refund system, traffic & revenue attribution system, etc.- Analysis, design and implementation to convert existing Udemy system infrastructure to support pricing/purchase in multiple currencies.- Improvements applied to… Show more Full-stack engineering at Payments system. Enabling multi-currency & multi-gateway payments experience at scale.- Quick engagement to existing codebase which has been implemented in PHP.- Made various fixes/improvements on Stripe & PayPal integrations, refund system, traffic & revenue attribution system, etc.- Analysis, design and implementation to convert existing Udemy system infrastructure to support pricing/purchase in multiple currencies.- Improvements applied to existing system to increase monitorability and traceability.- Active role in migration of existing PHP code to new Python/Django environment. Team successfully migrated allPayments System services/operations gradually from PHP to Python in 1 year! Existing business initiatives/requests are maintained in parallel during this time.- Building backend processor tasks to handle post-purchase operations such as revenue attribution, revenue splitting, etc.[PHP, Python, Django, Celery, MySQL, NewRelic] Show less

Software developer and core infrastructure development team leader in a large scale NATO Air Command and Control project (AirC2IS) contracted by NATO Communications and Information Agency (NCIA).Responsibilities:- Leading core infrastructure development team (of 7 software engineers).- Analyze, design and development of solutions for infrastructural software requirements.- Development of multi-tiered web application architecture- Development of a generic framework for… Show more Software developer and core infrastructure development team leader in a large scale NATO Air Command and Control project (AirC2IS) contracted by NATO Communications and Information Agency (NCIA).Responsibilities:- Leading core infrastructure development team (of 7 software engineers).- Analyze, design and development of solutions for infrastructural software requirements.- Development of multi-tiered web application architecture- Development of a generic framework for .NET enterprise web application core capabilities.- Developing technical solutions, providing technical consultancy to internal groups of project/company.[SOA, ASP.NET, unit testing (Moles & Fakes), SignalR, WCF(Windows Communication Foundation), EF(Entity Framework), NHibernate, Enterprise Library, Unity, PostSharp, MSMQ, AppFabric Cache, Memcached, Lucene] Show less

Worked on Technical Assistance for development of the New Computerized Transit System (NCTS) and Integration into Turkish Customs Administration System.- Responsible from the analysis of both EU NCTS operations and Turkish customs systems as a member of core software infrastructure team.- Gained hands on experience about exchange of formatted electronic messages between different systems.- Participated in the design and implementation of necessary web service infrastructure to… Show more Worked on Technical Assistance for development of the New Computerized Transit System (NCTS) and Integration into Turkish Customs Administration System.- Responsible from the analysis of both EU NCTS operations and Turkish customs systems as a member of core software infrastructure team.- Gained hands on experience about exchange of formatted electronic messages between different systems.- Participated in the design and implementation of necessary web service infrastructure to interoperate different software systems.[JAX-WS, Oracle APEX (Oracle Application Express)] Show less

Worked on TBS (Turkish Armed Forces Information System) project. Which is a military enterprise web application developed with Java EE technologies.- In-depth understanding of multi-tier enterprise application development- Participated in the analysis, design and development of some of the J3-Operations modules.- As a member of the software core infrastructure development group, responsible from development and support of all the required infrastructural aspects of the… Show more Worked on TBS (Turkish Armed Forces Information System) project. Which is a military enterprise web application developed with Java EE technologies.- In-depth understanding of multi-tier enterprise application development- Participated in the analysis, design and development of some of the J3-Operations modules.- As a member of the software core infrastructure development group, responsible from development and support of all the required infrastructural aspects of the software.- Developed a generic validation framework for the JSF (JavaServer Faces) to support all the necessary client and server side validations of application in a common way.- Participated in the preparation of necessary services and software infrastructure to provide TBS and formatted message-based data exchange systems interoperability.- Participated in the development of core security module which uses LDAP for user management, authorization and authentication with single sign-on capability.- Lead the development and integration of GIS module and core software infrastructure entirely to provide necessary GIS services for all the modules.- Experience on various enterprise web technologies of Java EE environment.[JSF (JavaServer Faces), AJAX, Spring, Hibernate, Acegi(Spring Security), CAS(Central Authentication Service), Ivy, JUnit, Cruise Control, Ant, JIRA, Confluence] Show less

Worked on TAIKS (Fire Support, Command, Control and Communication System) project. - Responsible from the development of PCS (Planned and Current Situation) module’s preferences and directives sub module. - Hands on experience related to desktop application development by Java Swing with database back end managed by Hibernate integration. - Worked on analysis and design tools by the usage of ClearCase and Rational Rose.

Member of the software development team.- Coding, Documentation, Bug Resolving for Gusto ERP project.[Microsoft Visual C++, MFC library]- As a software engineer, participated in analysis, design and development of ASP.NET based ERP project which requires heavy data processing abilities.[ASP.NET]