Software Developer in Istanbul, Turkey

I co-developed an open-source authentication server template supporting regular signup and login processes and social networks that support OAuth and OAuth2.0. Its generic design can integrate with the new system in minutes.

Technologies: Node.js, Express.js, PostgreSQL, OAuth, OAuth2.0, Heroku, Twitter API, GitHub API, Google API, Facebook API, and LinkedIn API

I co-developed an Open Source - Payment Server template integrated with Stripe and Coinbase Commerce payment systems.

Technologies: Node.js, Express.js, PostgreSQL, MongoDB, Stripe, Coinbase Commerce, and Heroku.

I co-developed an open-source file storage server template that supports uploading and downloading files from AWS S3. With its generic design, it was able to integrate with the new storage systems in a short time.

Technologies: AWS S3, Node.js, Express.js, MongoDB, Heroku, and Mongoose

I co-developed an Open Source - Angular UI template that contains reusable UI components and API services for most common functionalities like signup, login, and edit profile. On top of that, I integrated it with my other templates (authentication server, basic information server). I extended the template for more specific solutions like the Company Profile UI Template.

Technologies: Angular, TypeScript, Express.js, SCSS, and HTML

I prototyped a site that tracks the latest releases of popular GitHub repositories daily to help solve an outdated problem for developers. To prototype quickly and cost-effectively, I used Heroku Cloud for the back end and Netlify for the front end.

Technologies: Node.js, React, Reactstrap, Gatsby, Heroku, Netlify, GitHub API v4 (GraphQL), MongoDB, AWS Lambda, AWS CloudWatch, CSS, and HTML.

I co-founded and developed, from the ground up, a platform to discover talents from open source communities like GitHub and Stack Overflow. This is done by analyzing public code repositories of the developer on GitHub, gathering continuous integration info from Travis-CI, and code coverage info from CodeCov. The platform also gives smart recommendations to developers via a built-in recommendation engine. The platform ended up analyzing 20 million contributors globally, and I successfully exited this startup.

Technologies: Java, Spring Framework, PostgreSQL, Heroku, LinkedIn API, GitHub API, Stack Overflow API, Travis-CI API, CodeCov API, JavaScript, CSS, HTML, and Bootstrap.

I worked as a maintenance team member on the Jive Integrations module, one of the platform's core modules. I had a chance to get familiar with various third-party APIs, including Google, Facebook, Evernote, and SalesForce.

Technologies: Java, Spring, Redis, MySQL, and REST.

I worked as a team lead of the maintenance team at the offline charging project at Redknee. I orchestrated pull requests and version management. I also reviewed and validated codes written by other team members.

Technologies: Java, Perl, SOAP, ClearCase, and Service Language.

I was in charge of replacing unreliable code parts with corresponding community-approved libraries of many internal products of the company. Integrated various clients' code to ensure code quality in our system using aspect-oriented programming.

Technologies: Java, Spring, Python, REST, Redis, MySQL, and PostgreSQL.

I developed a fraud management tool from the ground up, which is fully customizable. The user can create their own rules to monitor specific fields in ticket or payment information.

Technologies: Java, Spring Framework, JSF, JPA, Hibernate, XML, SOAP, Richfaces, and OracleSQL.

I developed a tokenization system for encrypting sensitive data in the ticket and payment information in wholesale channels in the company.

Technologies: Java, Spring Framework, JSF, JPA, Hibernate, XML, SOAP, Richfaces, and OracleSQL.

I integrated PayPal into the Online Payment Solutions module. I also resolved integration issues with Amex. Another task I completed was implementing integration modules with various local banks.

Technologies: Java, Struts, JSF, JPA, Hibernate, XML, SOAP, JavaScript, Richfaces, and OracleSQL.

As an open-source developer, I increased the code coverage of the OSGi-over-SLF4J module from 0 percent to 100 percent.

Technologies: Java, JUnit, Mockito, PowerMock, Jacoco, Cobertura, Github, and Travis-CI

As an open-source developer, I increased the code coverage ratio of the play-pac4j module to 78 percent and the Buji-pac4j module to 85 percent.

Technologies: Java, JUnit, Mockito, PowerMock, Jacoco, Cobertura, Github, and Travis-CI

As an open-source developer, I increased the jodd-decora module's code coverage from 63 percent to 90 percent.

Technologies: Java, JUnit, Mockito, PowerMock, Jacoco, Cobertura, Github, Travis-CI, and Open Source

Developed an open-source plugin for Redmine using Ruby, HTML, JavaScript, and CSS that simply hides the sidebar, which many people still use after six years.

Technologies: Ruby, HTML, JavaScript, and CSS

I developed an open-source plugin for Redmine using Ruby, HTML, JavaScript, and CSS, which is converting a standard combo box into a searchable combo box.

Technologies: Ruby, HTML, JavaScript, and CSS