Uğur Güler, Domain-driven Design (DDD) Developer in Ankara, Turkey
Uğur Güler

Domain-driven Design (DDD) Developer in Ankara, Turkey

Member since March 25, 2019
Along with having nearly a decade of in-depth experience, Uğur is a lead/senior full-stack developer specializing in large-scale web applications. A career highlight of Uğur's was when he spearheaded the development of microservices that handled more than 10 million requests per day. What Uğur is passionate about is working with motivated teams, and he will add significant value to any project.
Uğur is now available for hire

Portfolio

  • Uniobi
    AWS Lambda, React, Material-UI, DynamoDB, AWS API Gateway, GitLab
  • T2
    JavaFX, OSGI, Java, React, Material-UI, Redux
  • Tubitak
    Microservices, Nginx, Kafka, Elasticsearch, Docker, Redis, Java, Ember...

Experience

  • Java, 10 years
  • Spring, 6 years
  • Domain-driven Design (DDD), 4 years
  • Microservices Architecture, 4 years
  • Apache Kafka, 4 years
  • Nginx, 3 years
  • React, 3 years
  • Amazon Web Services (AWS), 1 year

Location

Ankara, Turkey

Availability

Part-time

Preferred Environment

Git, Mac, Linux

The most amazing...

...product I've built was Turkey's public payment and treasury microservices with a yearly online payment volume of approximately $230 billion.

Employment

  • CTO | Co-founder

    2018 - 2019
    Uniobi
    • Co-founded the company.
    • Selected the technologies.
    • Designed the system and architected both back-end and front-end.
    • Implemented a continuously running, fault-tolerant single-page web application.
    Technologies: AWS Lambda, React, Material-UI, DynamoDB, AWS API Gateway, GitLab
  • Senior Software Engineer

    2018 - 2019
    T2
    • Developed the software product line.
    • Performed JVM tuning and analysis for optimal performance and detected memory leaks.
    • Suggested and implemented a solution that both codebase size and number of software bundle decreased to one-third.
    • Created multiple event buses along with an existing global event bus, resulting in the removal of thousands of recurring actions.
    Technologies: JavaFX, OSGI, Java, React, Material-UI, Redux
  • Team Lead | Senior Software Engineer

    2015 - 2018
    Tubitak
    • Re-engineered a legacy public finance system in Turkey with open source technologies and developed a highly available, cost-efficient, fault-tolerant, and large scale distributed web application.
    • Spearheaded with a team of 8-9 the development of the payment, treasury microservices.
    • Simplified the business processes and shaped the architecture direction for meeting longterm business goals.
    • Created APIs and Integrated them several systems including the Central Bank of Turkey, treasury, and electronic signature infrastructure.
    • Wore many hats including DevOps, product owner, and full-stack developer.
    • Acted as a technical advisor for developers.
    Technologies: Microservices, Nginx, Kafka, Elasticsearch, Docker, Redis, Java, Ember, Spring Boot, PostgreSQL, Hibernate, Marathon, Apache Mesos, CAS, JavaScript, Git, Nexus, Pinpoint
  • Software Engineer | Team Lead

    2011 - 2015
    Tubitak
    • Worked on an integrated social assistant system that manages more than 30 million citizen and billions of aid.
    • Implemented the planning, analysis, design, development, unit testing, integration testing and maintenance phases of the software lifecycle.
    • Wrote an algorithm that solved a complex health insurance problem.
    • Migrated tens of gigabytes of data while ensuring data sanity and zero data loss.
    • Delivered three software modules (delivery, aid, health insurance) with a team of 4-5 members.
    Technologies: Java EE, Hibernate, Oracle WebLogic, Adobe Flex, Ranorex

Experience

  • Tubitak | Public Finance System (Development)

    We replaced a legacy system used by the treasury and ministry of finance with open source technologies. The system consisted of the management of the budget, debt payment, account, asset, collection, and revenue. I was responsible for treasury and payment microservices and micro front ends.

    Technologies: Nginx, Kafka, Elasticsearch, Docker, Java, Redis, Spring Boot, Ember, JavaScript, PostgreSQL, Hibernate, Mesos, CAS, Git, Nexus, Pinpoint, Marathon

  • Tubitak | Social Assistance Project (Development)
    https://www.slideshare.net/slideshow/embed_code/key/CxtT6NFGI1TCKF

    The Integrated Social Assistance System (ISAS) is an eGovernment system that electronically facilitates all steps related to the management of social assistance including the application, identification of eligibility, disbursement of funds, and auditing.

Skills

  • Languages

    Java, JavaScript, Python
  • Frameworks

    Spring, Ember.js, Hibernate, Redux, Spring Boot, Material-UI, Marathon, Spring Microservice
  • Tools

    Git, ELK (Elastic Stack), Nginx, Confluence, Docker Compose, Jira, Mesos, Bamboo, Hudson, Jenkins, Toad, Amazon SQS
  • Paradigms

    Microservices Architecture, Agile Software Development, Test-driven Development (TDD), DevOps, Asynchronous Programming, Aspect-oriented Programming, Unit Testing, CQRS
  • Platforms

    Apache Kafka, Java EE, Amazon Web Services (AWS), Web, AWS Lambda, Linux, Nexus
  • Storage

    AWS DynamoDB, PostgreSQL, AWS S3, Redis, Cassandra, AWS RDS, NoSQL
  • Other

    EJB, System Design, RESTful APIs, Product Owner, Domain-driven Design (DDD), Scalability, Caching, Artificial Neural Networks (ANN), Support Vector Machines (SVM)
  • Libraries/APIs

    React, Google Maps

Education

  • Master's degree in Information Systems
    2011 - 2015
    Middle East Technical University - Ankara, Turkey
  • Bachelor's degree in Computer Engineering
    2005 - 2010
    Istanbul Technical University - Istanbul, Turkey
  • Participated in a student exchange program in Computer Engineering
    2008 - 2009
    Université de Nantes - Nantes, France
Certifications
  • AWS Certified Solutions Architect
    OCTOBER 2018 - OCTOBER 2020
    Amazon
  • Oracle Certified Expert, Enterprise JavaBeans Developer
    SEPTEMBER 2012 - PRESENT
    Oracle
  • Oracle Certified Professional Java Programmer
    APRIL 2011 - PRESENT
    Oracle

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