Software Engineer with 15+ Years of Experience
As a highly motivated and driven software engineer with a passion for solving complex technical challenges, I bring a unique blend of deep technical expertise and practical problem-solving skills. With extensive experience in Java, full-stack development, microservices architecture, and cloud technologies, I have successfully led the design and implementation of scalable enterprise systems. My career spans from early-stage startups to large corporations, where I've contributed to significant technical initiatives with a focus on code quality, performance optimization, and team collaboration.
When I'm not coding, I enjoy hiking, reading about emerging technologies, and spending quality time with family and friends. I believe my determination, passion for continuous learning, and collaborative approach make me a valuable asset to any team.
mustafa.kemal.oecel@gmail.com
mustafa.kemal.oecel@gmail.comPhone
+49 174 96 414 96Location
Hamburg, Germany
Skills & Expertise
Technical Skills
Programming Languages
- ▸Java
- ▸JavaScript
- ▸TypeScript
- ▸Python
- ▸Kotlin
- ▸SQL
- ▸ABAP
- ▸HTML5
- ▸CSS3
- ▸PHP
- ▸XML
Frontend Frameworks
- ▸React
- ▸Next.js
- ▸Angular
- ▸Vue.js
- ▸Thymeleaf
- ▸jQuery
- ▸Bootstrap
Backend Frameworks
- ▸Spring Boot
- ▸Spring Data JPA
- ▸Spring JDBC
- ▸Hibernate
- ▸Express.js
- ▸Node.js
- ▸Tomcat
- ▸JBoss
- ▸Wildfly
Databases
- ▸PostgreSQL
- ▸MySQL
- ▸MariaDB
- ▸Oracle
- ▸MS-SQL
- ▸HSQL
Cloud & DevOps
- ▸AWS (EC2, S3)
- ▸Docker
- ▸Kubernetes
- ▸Jenkins
- ▸GitLab CI
- ▸CI/CD Pipelines
Tools & Platforms
- ▸Git
- ▸SVN
- ▸Maven
- ▸Gradle
- ▸Apache Solr
- ▸Elasticsearch
- ▸Hazelcast
- ▸JMeter
- ▸Liquibase
- ▸Flyway
Architectural Patterns
- ▸Microservices
- ▸REST APIs
- ▸SOAP
- ▸Event-Driven Architecture
- ▸Database Optimization
- ▸Performance Tuning
Other
- ▸JPA
- ▸JMS
- ▸EJB
- ▸JSF
- ▸JSP
- ▸Quartz Scheduler
- ▸Caffeine Cache
- ▸SAP NetWeaver
- ▸Mockito
- ▸JUnit
- ▸TestNG
Soft Skills
Teamwork and Collaboration
Effective Communication
Problem Solving
Self-Discipline
Reliability
Adaptability
Leadership
Mentoring
Technical Documentation
Stakeholder Management
Professional Experience
Bus Driver
Hochbahn AG
06/2022 - Present
Hamburg, Germany
Key Responsibilities
- Operating buses on various routes
- Ensuring passenger safety and comfort
- Maintaining schedules and route efficiency
Senior Full Stack Developer
Private Projects / Freelance
06/2021 - Present
Hamburg, Germany
Key Responsibilities
- Development of personal portfolio and web applications
- Android app development with Kotlin
- Full-stack web development with modern frameworks
Technologies Used
Full Stack Developer (Project-based)
SAMS-ON GmbH
05/2022 - 08/2022
Hamburg, Germany
Key Responsibilities
- Database refactoring and optimization
- Legacy system maintenance and enhancement
- Food ordering and cafeteria management system
Technologies Used
Senior Java Developer (Project-based)
pixelboxx GmbH
05/2021 - 07/2021
Dortmund, Germany
Key Responsibilities
- PostgreSQL and Oracle database optimization
- Legacy image processing portal maintenance
- System performance improvements
Technologies Used
Senior Java Developer
HanseMerkur Krankenversicherung AG
10/2020 - 05/2021
Hamburg, Germany
Key Responsibilities
- Oracle database refactoring and optimization
- Legacy system maintenance
- Insurance request tracking implementation
- Customer portal development and enhancement
Technologies Used
Senior Java Developer
Gehalt.de GmbH
11/2014 - 10/2020
Hamburg, Germany
Key Responsibilities
- Microservices development and optimization
- Salary calculation engine implementation
- Master data management system
- Job posting import and full-text search
- B2B/B2C questionnaire implementation
- Database optimization
Technologies Used
Senior Java Developer
motoso.de GmbH & Co. KG
01/2014 - 11/2014
Hamburg, Germany
Key Responsibilities
- Portal maintenance and enhancement
- MySQL database refactoring and optimization
- Feature development and bug fixes
Technologies Used
Senior Java Developer
whatever mobile GmbH
12/2012 - 12/2013
Hamburg, Germany
Key Responsibilities
- REST application development for SMS routing
- Mobile number portability microservice
- Supplier connector implementation
- Database optimization
Technologies Used
Java Application Developer
gamigo AG
10/2008 - 11/2012
Hamburg, Germany
Key Responsibilities
- Gamigo Account System development
- Game server connector implementation
- Automated game item management
- Database optimization across MySQL, MS-SQL, PostgreSQL
Technologies Used
Java Developer
ServerSoft Smart Solutions GmbH
03/2008 - 09/2008
Hamburg, Germany
Key Responsibilities
- CRM system development
- Document management system implementation
- Single sign-on and webshop integration
- Database optimization
Technologies Used
Education & Certifications
Formal Education
Application Developer Specialist (Fachinformatiker/Anwendungsentwicklung)
CBM Bildung und Managementberatung GmbH
03/2003 - 01/2005
Hamburg, Germany
EDV Programmer / IT Technician
Üniversität Selcuk Fachhochschule Eregli
1996 - 1999
Turkey
Secondary Education (Gymnasium)
Isparta Gönen Anadolu Lisesi
1992 - 1996
Turkey
Professional Training
Full Stack Development
Alfarraining Bildungszentrum GmbH
01/2022 - 05/2022
Hamburg, Germany
JavaScript, Node.js, React, PHP, MySQL Certificates
Professional English VPET
WBS Training AG
10/2021 - 12/2021
Hamburg, Germany
Professional English with preparation for VPET language exam
SAP Advanced Training
WBS Training AG
10/2007 - 02/2008
Hamburg, Germany
SAP NetWeaver 04 Development Consultant certification with ABAP focus
Languages
German
Native speaker, fluent in professional and everyday communication
Turkish
Native speaker, fluent in all contexts
English
Professional proficiency with VPET certification. Capable of handling complex technical discussions and business communication.
Let's Work Together
Ready to discuss your next project or collaboration? Get in touch with me today.