Freelancer profile translated to English.

Description

Hakan is a driven and versatile integration specialist with extensive expertise in complex integration projects. Since 2020, he has been successfully applying his expertise as an independent professional.

With in-depth knowledge of integration tools such as Oracle Fusion Middleware (SOA, BPEL, ESB, OSB, WebLogic), IBM WebSphere Message Broker (WMB), and TIBCO BusinessWorks, Hakan is an expert in building and managing robust and scalable integration solutions. Recently, he has also gained extensive experience with MFT (Managed File Transfer), AWS, and Kafka solutions, highlighting his versatility and adaptability.

In addition to his technical skills, Hakan has experience coordinating projects in business-critical environments and performing management tasks. This broad background enables him to develop software that is not only functional and efficient but also excellently manageable.

What makes Hakan unique is his ability to quickly master new technologies and methods. Even in situations where he has little to no experience with specific tools or frameworks, he manages to be operational and effective in a short time. He has proven this time and again with clients who entrusted him with new challenges.

Hakan is a perfectionist who maintains a balance between details and the overall picture. He is proactive, solution-oriented, and has a keen eye for his clients' wishes and requirements. His communication skills enable him to collaborate effectively at all levels, even under pressure or in changing circumstances. Thanks to his experience in DevOps teams, he has proven to make a valuable contribution to modern, agile working methods.

With his enthusiasm for new challenges and passion for learning, Hakan is the ideal choice for organizations that need a reliable, flexible, and results-oriented integration specialist.

Languages

Dutch
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Utrecht (up to 50km)

H-KHN28 Consultancy
Owner
May 2020 - Today (6 years and 1 month)
Utrecht, Netherlands
Own Consultancy company for Freelance assignments. Assignments are executed and invoiced in the name of this company.
Alliander
DevOps Middleware Integration Specialist (Freelance)
January 2023 - December 2024 (1 year and 11 months)
Arnhem, Netherlands
DevOps MFT and Kafka Engineer – Integration Specialist Situation: Alliander is an independent (B2B) transaction platform for electricity that administratively and financially settles direct transactions between generators and consumers, regardless of their location. It helps in working safely in the soil according to existing laws and regulations. Within Alliander, Team KIT is responsible for the Middleware transfer layers MFT (Managed File Transfer) and all Kafka connections. Tasks:
• Working in DevOps / SCRUM
• Refinements of the (Jira) stories
• Building/Modifying the Seeburger MFT according to requests, incidents, and improvement processes
• Major migration of Seeburger MFT
• Installing, configuring, and monitoring the Seeburger MFT Clients on servers
• Creating and managing Kafka Topics, Users, ACLs, certificates, etc. for the Strimzi and Aiven environments
• Resolving incidents, answering questions via Service Now or AdHoc
• Maintaining contact with internal and external clients to address changes and incidents promptly to minimize problems
• Maintenance of security certificates
• General daily monitoring of all Seeburger MFT and Kafka environments Result: A stable MFT and Kafka environment where changing circumstances (technical or request-related) can be realized quickly. This ensures the continuity of important business processes. Tools and Methods: DevOps, Kafka, Seeburger, MFT, Strimzi, Aiven, Kubernetes, ArgoCD, KafkaUI, Grafana, WS-Security, Jenkins, XMLSpy, Git, GitHub, ServiceNow, AWS, BisLink, CI/CD, XML, XSD, Jira, Linux, Confluence, Python, Postman, IntelIJ, Visual Studio Code, SFTP, SLMP, FileSystem, Amazon S3 bucket, http client and server, CIFS, Scheduler & Polling etc.
TenneT Middleware
Integration Engineer
January 2021 - January 2023 (2 years)
Arnhem, Netherlands
Oracle SOA Suite (BPEL) / Service Bus (OSB) Developer – Integration Specialist
Situation: Tennet ensures a reliable and uninterrupted electricity supply to the 36 million end-users in the markets they serve. Due to constantly changing market conditions and demands, continuous changes occur in the middleware layer. On a project and Scrum basis, various teams implement the desired changes and additions in the middleware layer (OTAP environment). Tasks:
• Working in DevOps / SCRUM
• Preparing the (Jira) stories to start building the services
• Building/Modifying Oracle SOA / OSB services
• Creating/Executing unit/integration tests
• Holding knowledge and refinement sessions with other developers Result: Delivering the desired changes/services on time after each SCRUM sprint, thereby ensuring the continuity of processes. This also guarantees customer satisfaction and enables stable data transfer for the entire electricity transition within Europe. Tools and Methods: DevOps, JDeveloper, Oracle OSB 12C, Oracle SOA Suite 12C, Pipelines, SOA, OSB Console, Enterprise Manager, Weblogic, XLRelease, XLDeploy, WS-Security, Jenkins, XMLSpy, Git, CI/CD, XML, XSD, Jira, Linux, Confluence, Python, SoapUI, Postman, IntelIJ, etc.