YALIM AYTUL

Email: austin17427@gmail.com
LinkedIn: www.linkedin.com/in/yalimaytul

Qualifications Summary

I am a forward-thinking Senior Software Architect and Cloud Architect with over 25 years of experience in software engineering, and a proven track record of success in leading development teams in highly competitive markets using the latest technologies. My focus is on back-end technologies, specifically scalable, 12-factor applications and cloud-native applications. I am dedicated to staying up-to-date with the latest trends and advancements in the industry to provide the most innovative solutions. My approach combines both creative and analytical thinking to solve complex engineering problems, and I have a reputation for designing, developing, implementing, and managing web and cloud-based applications that exceed expectations.

I take great pleasure in leading development and creating tools and solutions that improve efforts, increase efficiency, streamline processes, and enhance product performance and features. My vast experience in a variety of programming languages and tools, including Java, Bash, JavaScript, and Python, as well as virtualization technologies, allows me to tackle projects with a comprehensive perspective.

Technical Proficiencies

Programming/Scripting Languages

Java, Bash, JavaScript, Python

Design Patterns/Application Platforms/Frameworks/Libraries/Tools

DDD, Enterprise Integration Patterns, GoF Patterns, J2EE Design Patterns, REST, 12 Factor apps, Spring, Spring Boot, Spring Security, Spring MVC, OAuth2, Hibernate, JUnit, TestNG, JPA, Apache Camel, Liquibase, NodeJs, Angular, AngularJS

Virtualization/Automation/Tools

Docker, Kubernetes, Proxmox, LXC/LXD, Jenkins, Sonar, Terraform, Ansible, Selenium, git, maven, JaCoCo, Postman, GitLabCI, ArgoCD, Prometheus, OpenTelemetry, Helm

Public Cloud Providers

AWS, GCP, Digital Ocean, OpenShift

Platforms

Windows, Debian, Ubuntu, macOS

RDBMS/NoSQL/Application/Messaging Servers

Oracle, PostgreSQL, H2, MS SQL, Apache Tomcat, Apache Kafka, ActiveMQ, MongoDB, MemCached, Redis, Apache Cassandra

Certifications

• RHCSA
• Red Hat Certified Engineer
• Red Hat Certified Specialist in OpenShift Administration
• AWS Certified Solutions Architect

Professional Experience

Kyndryl

System Reliability Engineer Austin, TX (April 2018 - Present)

• Proficient in utilizing powerful monitoring tools such as Prometheus, ArgoCD, and Jaeger to monitor complex systems at scale.
• Deep understanding of the nuances of these tools and their applications.
• Skilled in using these tools to identify and resolve issues quickly and effectively.
• Committed to delivering reliable and scalable systems that meet the highest standards of performance and availability.
• Experienced in working independently or as part of a team to achieve project objectives.
• Conducted root cause analysis of system failures and implemented corrective actions.
• Collaborated with cross-functional teams to ensure system security and compliance with industry standards and regulations.

Aug70 Co

Owner Austin, TX (August 2009 - April 2018)

• Developed and designed multiple cloud-native applications with Restful architecture and OAuth2 security, leveraging the latest technologies and frameworks including Spring Boot and Spring Security OAuth2 to enable seamless authentication with social accounts.
• Successfully migrated monolithic applications to microservices architecture with Kubernetes, improving scalability, performance, and reliability while reducing infrastructure costs.
• Implemented Domain Driven Design principles to redesign and refactor complex finance domain websites, resulting in significant improvements in maintainability, scalability, and user experience.
• Built and deployed multiple public cloud solutions with Infrastructure as Code (IAC), ensuring consistency and reproducibility across environments.
• Created fully automated Continuous Integration (CI) build pipeline and deployment infrastructure and processes for multiple projects, resulting in faster time to market and increased efficiency.

Key Accomplishments

• Create and deploy AWS, GCP infrastructures with Terraform and cloud-init.
• Implemented third party integrations with Apache Camel for refund check processing and gathering marketing metrics.
• Architect and implemented ETL solutions with XStream, Apache POI, Spring Web Services.
• Architect and implemented user activity auditing layer with Spring AOP.
• Enabled multi environment/multi module maven builds with Liquibase that runs on Oracle, PostgreSQL and H2.
• Architect and built Selenium project with multiple remote controllers and many concurrent Se tests that runs on Amazon EC2 platform. Streamlined this solution to customers Jenkins continuous build environment.

Calavista Software

Senior Architect Austin, TX (April 2015 - February 2018)

• Architect cloud-native, scalable, twelve-factor applications
• Overseeing architectural design and implementation over multiple projects.
• Interact with clients and solutions directors to gather and clarify requirements. Interact with team leads over software design and implementation.
• Assess and analyze technical solutions, help project team adopting the most suitable technical stack.
• Provide code reviews and proactively identify code design and implementation problems.
• Implement continuous integration for overseas teams and automate code builds, code quality analysis and delivery.
• Provide proof of concept for technical challenges.

Aptitude

Senior Consultant Dallas, TX (August 2012 - April 2014)

• Design, implement, refactor backend services for multi layered, high availability, multi module web application.

Key Accomplishments

• Introduce and promote best practices for unit, integration and mock testing.
• Establish code coverage and code quality metrics for continuous delivery.
• Design, implement asynchronous processes that helps overall performance. Developed remotely managed scheduled tasks that simplifies administrative tasks and reporting.

Electronic Arts

Senior Software Engineer Austin, TX (November 2011 - August 2012)

• Working in EA digital platform nucleus scrum team for EA's RESTful commerce and identity system sprint tasks.
• Participated in EA's next generation commerce and identity modules architectural design work.
• Refactored legacy Spring framework test code in unit and integration tests for more contemporary usage.

Key Accomplishments

• Migrated Hibernate second level cache and query cache from Oracle Coherence to Memcached.
• Improved overall performance of couple slow and frequently running production queries by code refactoring and implementing caching.

Private Company

Senior Consultant Austin, TX (August 2009 - November 2011)

• Redesigned build and deployment processes by implementing CI/CD.
• Adding unit, integration, user acceptance tests and various other metrics to maintain performance and code quality.
• Implement services and messaging solutions to decouple existing code and enabled distributed architecture.
• Redesign existing commodity trading application structure to a domain driven design architecture.
• Migrating existing JDBC oriented trading platform to object relational architecture.
• Redefine, refactor domain model and application structure by implementing object oriented, aspect oriented design concepts and domain driven design principles.
• Introduced entity auditing and versioning with Hibernate Envers.

Key Accomplishments

• Refactor and implement object relational mapping and data access with Hibernate, JPA, services and DAOs.
• Ensure %100 unit test coverage on implemented entities, services and DAO classes.
• Implement Spring and Spring Security framework for the existing legacy application.
• Refactored and replaced Struts servlets with Spring MVC.
• Redesign and refactor database schema and manage changes with Liquibase.

QuickArrow

Software Development Team Lead Austin, TX (September 2008 - August 2009)

• Team lead and scrum master.
• Architect and implement complex object oriented, multi-tenant SaaS application with Spring, Hibernate, Struts 2 and JPA using J2EE patterns.
• Develop scheduling, time/ expense management and resource management application that streamlined e-business applications for resource planning, reporting and expense management.

Key Accomplishments

• Refactor existing Java application using repository, command, observer and strategy design patterns and aspect oriented programming.
• Implemented hibernate mapping with annotations and interceptors. Extensive experience developing services and solutions with Spring AOP, Spring DAO and Spring Security.
• Adopt best practices for Java performance tuning and code review for on going code quality improvement efforts with JProfiler, Sonar and Bugfinder.
• Integrate and configure Maven, Archiva, Emma, Cobertura configurations to be used in dev/qa environments with different OS systems.

Intouch Solutions

Software Development Team Lead Overland Park, KS (January 2002 - August 2008)

• Lead seven developers and serve as development lead for the major customer account. Provide technical interview and assessment of programming applicants. Guide and ensure growth of less experienced developers.
• Spearhead architectural design of complex e-business, object oriented applications and databases to be used by pharmaceutical companies and vendors. Coordinate and ensure efficiency of application development teams.
• Provide broad-based technical support to project team members. Systematically design and implement the components required for complex application features. Perform architectural design and programming of J2EE and asp.net web applications, backend applications, and database functionality.
• Administer Oracle and MS SQL databases, source versioning system and application servers, including IBM Web Sphere, Tomcat and Apache servers. Conduct unit, stress and performance testing of database and applications. Document and formulate application design and programming practices.

Key Accomplishments

• Sanofi-Aventis team lead for 5 years.
• Systematically designed, created, and maintained Java, .net frameworks and built more than 60 W3C XHTML, 508, SEO compliant web sites based on these frameworks.
• Design and integrate framework components built around Hibernate, Spring framework, Lucene, Tiles frameworks using lazy loading, interceptors, DI, AOP, request processor, search, templates features with Java.
• Built e-business applications that streamlined e-business applications for fulfillment, financial planning, reporting and clinical trials.
• Effectively performed unit, stress testing of clustered web applications with very high traffic and volume.

TEB Communications

Software Development Team Lead Istanbul, Turkey (1998 - 2001)

• Managed architectural design and implementation of various web sites and backend processes.
• Ensured membership growth and streamlined content management.
• Maintained functionality of Oracle and SQL databases and application servers.
• Led in research, discovery, planning and implementation efforts to significantly improve business processes.
• Ensured overall solution-level integrity of applications and evaluated current systems.
• Led in ensuring successful completion of projects and developed operational reports for submission to management, application processing, and card management divisions.

Hurriyet Newspaper

Sr. Developer Istanbul, Turkey (1993 - 1998)

• Rendered technical support in the design, development, and deployment of complex applications in global distributed computing environments.
• Sustained information needs of accounting, stock department, and management through the strategic design and implementation of company intranet.

Education

YILDIZ TECHNICAL UNIVERSITY Istanbul, Turkey (1987 - 1992)

• Bachelor of Science, Mechanical Engineering. Minor: Energy Systems

Professional Trainings, Conferences and Events

• SpringOne, San Francisco 2017
• OSCON, Austin TX (2016-2017)
• ArchConf, Fort Lauderdale FL (2015)
• Spring One 2GX, Dallas TX (2014)
• NFJS Software Symposium, Austin TX (2010/2011/2012)
• Oracle Administration, Overland Park KS (2003)
• Vignette Advanced Template Development, London, UK (2001)
• Advanced Java Programming, Istanbul Turkey (2000)
• Advanced C Programming, Istanbul Turkey (2000)
• Principles of Application Development, Istanbul Turkey (1999)
• Oracle Performance Tuning, Istanbul Turkey (1998)
• Oracle PL SQL, Istanbul Turkey (1998)