Halil Kalkan Email & Phone Number

İstanbul, Türkiye

San Francisco, California, Us

San Jose, Ca, Us

San Jose, Ca, Us

Working as a backend developer for Webex EventsDeveloping new features that help both event organizers and attendees to take their event experience next levelTech Stack: Ruby on Rails, Go, GraphQL, PostgreQL

İstanbul, Turkey, Tr

Sourcing Value Project;- Sourcing Value is a new platform to automate sourcing needs for the automotive industry.- Have been working for backend team for 6 months.- The project tech stack contains mainly; Spring Boot, PostgreSQL, Jenkins and Docker.Mapfre Applications;- Developed Mapfre Agency Portal and Mapfre GO middleware applications- Increasing knowledge of Spring Boot, Spring JPA and Hibernate- Wrote unit tests with Junit and MockitoPOC Projects;- Generated an application that is connected to two database sources; one of them is running on the cloud and the other one is an on-premise database but connected to AWS with Direct Connect. To monitor performance and response times, visualization purposes; Spring Boot Actuator, Prometheus and Grafana are used. Apache JMeter is used to load test the application. The application itself and other tools run in Docker Containers. - Created an application that generates PowerPoint Charts dynamically based on the input which supports a variety of charts from bar to waterfall. Apache POI library is used for this project. Skywise Project;- Built ETL pipelines to prepare accurate and useful reports used by airlines. This process consists of parsing json and xls objects, joining different datasets to build new ones, cleaning them to fit an appropriate format, calculating new fields if necessary, with Python and PySpark functions- Completed Air Serbia Skywise Onboarding project (3 weeks onsite and 2 weeks remotely). Worked closely with the customer during onsite period to understand their needs - Increased knowledge in PySpark and other Skywise Tools for data analysis and visualization such as Contour, Slate, etc. - Supported Palantir PI team about build and data quality issues which includes lots of debugging in Python to find core reasons for all onboarded airlines

Madrid, Es

- Developing new features to loyalty management system based on the customer’s needs- Knowledge in Java EE applications, Oracle, PL/SQL and Spring concept As a side project:- Research and development in enterprise blockchain solutions- Writing smart contracts (aka chaincodes) in Go language - Developing proof-of-concept blockchain applications

Redmond, Washington, Us

Supporting Small, Medium and Corporate segment sales, learning direct sales and sales through partner

İstanbul, Levent , Tr

Completed a digital transformation project as a project owner

Istanbul, Tr

Leading the biggest club in Bogazici University that contains more than 800 members

Istanbul, Tr

- Leading more than 70 members of subcommittee- Coordinated ADhere Advertising Days which is one of the biggest events organized by university clubs

Istanbul, Tr, Tr

Working as a trainee in the call service applications development department

B.Sc., Computer Engineering

Science