Necati Demir, PhD, Machine Learning Developer in Summit, NJ, United States
Necati Demir, PhD

Machine Learning Developer in Summit, NJ, United States

Member since November 17, 2015
Necati is a computer scientist with 17 years of experience in the private industry, focusing on DevOps and machine learning. He is also an AWS Certified Solutions Architect with a PhD in computer engineering. He has led teams and driven infrastructure and architecture decisions for the last 10 years. Necati also takes an active role in the implementation and design phases of the infrastructure, architecture, and process.
Necati is now available for hire

Portfolio

  • Freelance Clients
    Scikit-learn, Flask, Machine Learning, Data Mining, Python, Web Scraping...
  • Datagran
    Artificial Intelligence (AI), Machine Learning, Python, Kubernetes, Docker...
  • Datagran
    Bayesian Statistics, Spark, Scikit-learn, Machine Learning, Data Science...

Experience

Location

Summit, NJ, United States

Availability

Part-time

Preferred Environment

Bash, Git, Python, Linux, Visual Studio Code, VS Code, Go

The most amazing...

...project I've done is an end-to-end CI/CD pipeline with GitHub Actions and Amazon EKS for a fintech startup.

Employment

  • Software Engineer & Architect | DevOps

    2015 - PRESENT
    Freelance Clients
    • Built an end-to-end CI/CD pipeline with GitHub Actions and Amazon EKS.
    • Functioned as a DevOps and software architect for an end-to-end data pipeline.
    • Re-architectured the existing data pipeline and managed the migration process.
    • Designed and implemented the system for executing long-running tasks on Amazon ECS.
    Technologies: Scikit-learn, Flask, Machine Learning, Data Mining, Python, Web Scraping, Ubuntu Linux, JavaScript, APIs, IPython, Pandas, Architecture, Web, SQL, HTML, DevOps, Amazon Web Services (AWS), CI/CD Pipelines, GitHub, Terraform, Shell, Scripting Languages, Data Pipelines, Automation, ETL, Cloud Platforms, Engineering, Software Architecture, Technical Leadership, Docker, AWS DevOps, Redis, Jenkins
  • CTO

    2020 - 2022
    Datagran
    • Contributed on technical and non-technical levels as a hands-on startup CTO.
    • Played a technical and active role in the product's development. Designed the architecture, took responsibility for the back-end development, and took on DevOps responsibilities to build CI/CD.
    • Performed the non-technical role of shaping the product vision, including alignment for product-market fit experiments. Built a high-quality software development cycle and used Kanban methodology to deliver the product.
    • Applied methodologies that dramatically decreased the number of bugs in production and increased the net promoter scores (NPS).
    Technologies: Artificial Intelligence (AI), Machine Learning, Python, Kubernetes, Docker, Bash, Linux, Management, Planning, Data Science, Back-end Development, Ubuntu Linux, Flask, APIs, IPython, CTO, People Management, DevOps, Pandas, Architecture, Web, Startups, SQL, HTML, Amazon Web Services (AWS), CI/CD Pipelines, Terraform, Shell, Data Pipelines, Automation, ETL, Cloud Platforms, Engineering, Software Architecture, Technical Leadership, AWS DevOps, Redis
  • Chief AI Officer

    2016 - 2020
    Datagran
    • Implemented machine learning methods to minimize the digital ad cost.
    • Used Spark for item recommendation and clustering customers based on historical purchase data.
    • Designed the architecture to run experimental ML methods.
    Technologies: Bayesian Statistics, Spark, Scikit-learn, Machine Learning, Data Science, Ubuntu Linux, Artificial Intelligence (AI), R, IPython, People Management, Pandas, Architecture, Web, SQL, HTML, DevOps, Amazon Web Services (AWS), CI/CD Pipelines, Shell, Scripting Languages, Data Pipelines, Automation, ETL, Engineering, Software Architecture, Technical Leadership, Docker, AWS DevOps, Redis
  • Technical Manager

    2011 - 2015
    Hermes İletişim & VAS Telekom
    • Managed a team of software developers.
    • Worked closely with managers to understand the requirements and translated them into a technical language that software developers can understand.
    • Implemented the initial phase of REST APIs. Handed them over to the team and ensured that software development went right.
    • Implemented the initial phase of the web application, which uses REST APIs, handed it to the team, and ensured that software development went right.
    • Implemented back-end services that use Asterisk.
    Technologies: Asterisk, MySQL, Java, Python, Web Scraping, Ubuntu Linux, Web2py, JavaScript, APIs, People Management, Architecture, Web, Startups, SQL, HTML, PHP, Amazon Web Services (AWS), DevOps, CI/CD Pipelines, Shell, Scripting Languages, Automation, Engineering, Software Architecture, Technical Leadership, AWS DevOps, Redis
  • Developer

    2009 - 2011
    Freelance
    • Provided Linux-based solutions: Supported Linux servers and provided VoIP-based solutions using Asterisk.
    • Developed for Remotee, which is a desktop sharing solution. I implemented the network infrastructure with UDP hole punching.
    Technologies: Asterisk, Linux, Ubuntu Linux, JavaScript, APIs, Pandas, Web, SQL, HTML, CI/CD Pipelines, Shell, Scripting Languages, Automation, Engineering, Redis
  • Software Developer

    2006 - 2009
    Hermes İletişim
    • Led the development of MultiPC, a thinstation based on custom Linux applications and Linux kernel. This project needs deep Linux knowledge to create a Linux distribution from scratch.
    • Managed Linux servers, installing and managing Linux web and mail servers for Hermes İletişim and its customers.
    Technologies: GNU Toolchain, Linux, Ubuntu Linux, Web, Startups, SQL, HTML, Shell, Scripting Languages, Automation, Engineering, Redis, Jenkins
  • System Support and Software Developer Specialist

    2005 - 2006
    Labris Teknoloji
    • Developed real-time log monitoring for web cache, web filter, and firewall modules. Used C++ on the server side in Java for the client side since the server side of the Labris Family is written in C++.
    Technologies: Linux, C++, Java, Python, SQL, HTML, Shell, Scripting Languages, Automation, Engineering

Experience

  • CI/CD Pipeline with GitHub Actions and Amazon EKS

    An end-to-end CI/CD system I built for a fintech startup.

    I used GitHub Actions to run Python tests, build Docker images, and push the images to the AWS container registry. I also used Terraform to create the AWS infrastructure and Kubernetes and Helm for deployment.

  • End-to-end Data Pipeline DevOps and Architecture

    Built the data ingestion and machine learning system's infrastructure using Kubernetes on GCP. I also worked as a back-end developer and manager on this project.

    I worked as a back-end developer implementing the API with Python and MongoDB and as a DevOps engineer implementing the CI/CD system with GitLab, Helm, Kubernetes, and Docker. I also managed a team of back- and front-end developers using the Kanban methodology.

    This project's most significant accomplishment is the DevOps part, which dramatically improved the product's fate. After the changes, the product's NPS changed from negative scores to between 90-100, and the average number of bugs decreased from 300 in production to less than 10. The details of the DevOps cycle that I designed and implemented can be found here: https://gist.github.com/ndemir/48caa5399f1bfe38bd6939f5d32f2c96

  • Linux System Admistration and Distributed High Available Architectural Design

    I built the infrastructure and architecture of a small telecommunication company and also worked as a back-end developer and manager on this project.

    RESPONSIBILITIES

    • Took a role as a back-end developer
    • Handled the implementation of API (Java, MySQL)
    • Contributed to the implementation of the voice call and IVR systems (FreeSWITCH, Asterisk)
    • Worked on the implementation of bulk email systems
    • Took the role of a system administrator and built a cluster of email servers to handle load balancing (HAProxy, Postfix)
    • Managed a team of back-end and front-end developers

  • Data Pipeline Re-architecture

    Switched to AWS Step Functions as a solution for the company, which had a dozen Lambda services that talk to each other and trigger the next from the previous one in a chain model without any centralization.

    I refactored the existing codebase to make it compatible with the new architecture. I also implemented the Terraform components to spin up the Step and Lambda Functions.

  • Module Design and Implementation for Long-running Tasks Execution on Amazon ECS

    A project for a software analytics platform company, which involved designing a system to fetch information on the libraries used in an application.

    I led a team of developers and DevOps engineers. I designed the software architecture, defined the standardization, and did the initial implementation. I also took the role of a DevOps engineer and wrote Terraform and converted those to Amazon ECS tasks.

  • The Economic Benefits of Artificial Intelligence (Publication)
    Will AI improve our lives beyond comparison, or will it steal our jobs and destroy humanity? In this article, Toptal AI expert Necati Demir, PhD, moves past the evil artificial intelligence of science fiction to discuss the current algorithm-based prediction AI, the economics of AI, and the economic benefits of artificial intelligence.
  • Ensemble Methods: Elegant Techniques to Produce Improved Machine Learning Results (Publication)
    Machine Learning, in computing, is where art meets science. Perfecting a machine learning tool is a lot about understanding data and choosing the right algorithm. But why choose one algorithm when you can choose many and make them all work to achieve one thing: improved results. In this article, Toptal Engineer Necati Demir walks us through some elegant techniques of ensemble methods where a combination of data splits and multiple algorithms is used to produce machine learning results with higher accuracy.

Skills

  • Languages

    JavaScript, Python, Bash, SQL, HTML, PHP, Java, C++, R, Go, Python 3
  • Libraries/APIs

    Node.js, Scikit-learn, Pandas
  • Tools

    Bitbucket, GitHub, IPython Notebook, IPython, Shell, Git, Terraform, Amazon EKS, Google Kubernetes Engine (GKE), PyCharm, Asterisk, GNU Toolchain, Azure Machine Learning, VS Code, Helm, GitLab CI/CD, FreeSWITCH, Postfix, AWS Step Functions, Jenkins, Amazon ECS (Amazon Elastic Container Service)
  • Platforms

    Ubuntu Linux, Linux, Kubernetes, Web, Docker, Google Cloud Platform (GCP), Amazon Web Services (AWS), Amazon EC2, AWS Lambda, Visual Studio Code
  • Storage

    MySQL, Data Pipelines, Redis, Amazon Aurora
  • Other

    Software Development, APIs, Back-end Development, Web Scraping, CI/CD Pipelines, Scripting Languages, Engineering, Artificial Intelligence (AI), Machine Learning, Data Mining, CTO, People Management, Architecture, Startups, Cloud Platforms, Software Architecture, Technical Leadership, AWS DevOps, Bayesian Statistics, Planning, Applications, Full-stack, Team Management, HAProxy, Load Balancers, Solution Architecture, High Availability Disaster Recovery (HADR), Networking, Scalability, AWS RDS, ECS, Lambda Functions
  • Frameworks

    Scrapy, Web2py, Web.py, Flask, Spark
  • Paradigms

    Data Science, DevOps, Automation, ETL, Management

Education

  • PhD in Computer Engineering
    2010 - 2018
    Dokuz Eylül University - İzmir
  • Master of Science Degree in Computer Engineering
    2006 - 2009
    Dokuz Eylül University - İzmir
  • Bachelor's Degree in Computer Engineering
    2001 - 2005
    Çanakkale On Sekiz Mart Universiy - Çanakkale

Certifications

  • AWS Certified Machine Learning – Specialty
    FEBRUARY 2023 - PRESENT
    AWS
  • AWS Certified Solutions Architect
    NOVEMBER 2022 - PRESENT
    Amazon Web Services
  • AWS Certified Cloud Practitioner
    OCTOBER 2022 - PRESENT
    Amazon Web Services

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