Nurazem Kaldybaev, Developer in Bishkek, Chuy Province, Kyrgyzstan
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Nurazem Kaldybaev

Verified Expert  in Engineering

Software Developer

Bishkek, Chuy Province, Kyrgyzstan
Toptal Member Since
January 30, 2014

Nurazem is a developer with extensive experience in building efficient, well-designed, and scalable web applications. As a part of software development teams at Zoomer, Grubhub, Intercom, and DeliveryHero, he has developed complex online business management applications and been responsible for products through their entire lifecycle.


Plainfield Technologies, Inc.
Ruby on Rails (RoR), Heroku, Amazon Web Services (AWS)
BlockCompare (via Toptal)
Amazon Web Services (AWS), JavaScript, Heroku, PostgreSQL, React, Phoenix...
CoStar Realla (via Toptal)
MySQL, Ruby, JavaScript, Elasticsearch, Vue, Ruby on Rails (RoR)




Preferred Environment

Git, RubyMine, ITerm, Visual Studio Code (VS Code), Sublime Text, OS X

The most amazing...

...thing I've coded is a mathematical algorithm to build an elastic projection from a linear projection to shape complex 3D objects.

Work Experience

Senior Software Engineer

2020 - 2022
Plainfield Technologies, Inc.
  • Designed and implemented multiple features from scratch: LAPM management, DEWR, and account management, among others.
  • Created a fully-fledged billing system in compliance with California Transportation Authority requirements. The billing system supports per-seat and usage-based billing, prorations up to determined dates, and custom invoices with rich metadata.
  • Introduced TDD/BDD frameworks, added background job queues, and developed logging and CI/CD pipelines.
Technologies: Ruby on Rails (RoR), Heroku, Amazon Web Services (AWS)

Senior Full-stack Engineer

2019 - 2019
BlockCompare (via Toptal)
  • Developed an app that monitors different key indicators of Bitcoin exchanges, wallets, and interest accounts and, as a result, makes recommendations based on user preferences indicated in a multiple-choice quiz.
  • Took over a Phoenix/React app one month after its inception and delivered a completed product in five months.
  • Made use of external APIs such as CoinAPI to retrieve, process, and display various properties of Bitcoin exchanges.
Technologies: Amazon Web Services (AWS), JavaScript, Heroku, PostgreSQL, React, Phoenix, Elixir

Senior Software Engineer

2019 - 2019
CoStar Realla (via Toptal)
  • - Worked on adding various new properties to the web spiders in the system created to crawl a large number of third-party websites.
  • - Transformed several central ERB template pages to Vue.js based components.
  • - Developed different algorithms for querying and analyzing records stored in ElasticSearch database.
Technologies: MySQL, Ruby, JavaScript, Elasticsearch, Vue, Ruby on Rails (RoR)

Software Engineer

2018 - 2019
DeliveryHero Hungerstation (via Toptal)
  • Worked on introducing command and repository patterns to an existing Rails app.
  • Broke the app down into manageable individual components.
  • Implemented new features in the GraphQL-based API used by the React front end.
Technologies: Ruby, JavaScript, React, GraphQL, Ruby on Rails (RoR)

Senior Software Engineer

2017 - 2018
Grubhub, Inc.
  • Developed a search system for orders, deliveries, and couriers using Elasticsearch and Cassandra.
  • Created Apache Spark jobs to intake and ingest large data sets into Elasticsearch and Cassandra as a backup system.
  • Maintained a central delivery operations service that manages all restaurants, markets, and couriers in the Grubhub system.
Technologies: Amazon Web Services (AWS), JavaScript, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (Amazon SNS), React, Python, Guice, Spring, Java

Software Engineer

2016 - 2017
Zoomer Delivery, Inc. (acquired by Grubhub)
  • Created a recruitment funneling system for driver applicants.
  • Automated the process of driver application processing starting from the process of online application, background checks, contract signing, and finally creating a driver in the Zoomer system.
  • Developed multiple features to increase the efficiency of deliveries.
  • Created new features, improved app performance, and fixed bugs for the main Zoomer platform, which encompasses all of the day-to-day operations.
Technologies: Amazon Web Services (AWS), Ruby, JavaScript, Python, Ionic, Angular, Ruby on Rails (RoR)

Software Engineer

2015 - 2016
Cake, Inc. (via Toptal)
  • Developed a mobile application in Ember.js for finding new restaurants in a given area, adding reviews and ordering food.
  • Worked extensively with Google Maps JavaScript SDK to create a fast map view.
  • Modified server-side logic in Node.js to accommodate changes in requirements for the mobile app.
Technologies: JavaScript, PhoneGap, Cordova, Node.js, Ember.js

Software Engineer

2014 - 2015
Intercom, Inc.
  • Developed a global user events feed and user profile REST API using Ruby on Rails.
  • Created client-side global user events and user profile applications using Ember.js.
  • Created Intercom apps for the Salesforce and Zendesk platforms.
  • Added integration for GitHub issues and Intercom conversations.
  • Built a PHP and Ruby client for the Intercom API. Also worked on enhancing Intercom Python client.
Technologies: Amazon Web Services (AWS), MySQL, Ruby, JavaScript, PHP, Dropwizard, Java, Backbone.js, Node.js, Ember.js, Ruby on Rails (RoR)

Web Developer

2013 - 2014
Inverse Point
  • Developed an entire inventory lifecycle management software system for a fashion startup (Mr. Draper LLC - largest in the region).
  • Created internal accounting software using PHP for a public sector company with branches in more than 100 countries.
  • Developed software for fleet, sales, and customer relations management using Ruby on Rails and AngularJS for car rental and sales companies in UAE.
  • Created a CRM module for a consulting company based in Dubai using Ruby on Rails.
Technologies: MySQL, Ruby, JavaScript, Memcached, Redis, PHP, AngularJS, Ruby on Rails (RoR)

Software Developer

2009 - 2011
Vector Foiltec GmbH
  • Implemented an AutoCAD module to automate the generation of construction parts from a building model using Lisp.
  • Developed a C++ plugin for AutoCAD to create a geometric projection of a 3D object to the plane.
  • Created a reusable VBA module to calculate stability wires for large structures.
  • Supported an existing automation tool for AutoCAD to dissect construction parts for machinery.
  • Developed a small module for automation of the Leipzig Zoo roof construction.
Technologies: C++, Lisp

I worked on global user events and user profile parts of the Intercom application. I also created integrations with third-party services such as Zendesk, Salesforce, and GitHub.

Mr. Draper

An inventory management platform built using Ruby on Rails. It is integrated with Salesforce as a CRM back-end and Payfort as a payment processor. The system handles the whole product lifecycle, starting from its creation in the warehouse through payment handling and delivery to the customer.

Grubhub Delivery Operations Center
A central system that manages restaurant working hours, market blackouts, courier communication and scheduling. One of the largest features I have worked on is the functionality of automatically managing the number of drivers depending on the market supply/demand.
2008 - 2011

Bachelor of Science Degree in Applied and Computational Mathematics

Jacobs University - Bremen, Germany


React, Zendesk API, Intercom API, Salesforce API, Node.js, PayPal API, Twilio API, Backbone.js, Vue


IntelliJ IDEA, Vim Text Editor, Git, Sublime Text, RubyMine, Zen Coding, ITerm, Amazon Simple Notification Service (Amazon SNS), Amazon Simple Queue Service (SQS)


Ember.js, AngularJS, Ruby on Rails (RoR), Angular, Dropwizard, PhoneGap, Ionic, Spring, Guice, Phoenix, React Native, Sinatra, Flask


CSS, Ruby, Java, Python, JavaScript, PHP, Lisp, GraphQL, Elixir, Go, C++


REST, Agile Software Development, Behavior-driven Development (BDD), Test-driven Development (TDD), Functional Programming


Heroku, Amazon Web Services (AWS), MacOS, Linux, OS X, Visual Studio Code (VS Code), Salesforce


MySQL, Redis, MongoDB, PostgreSQL, Memcached, Elasticsearch


Applied Mathematics, Mathematics, Software Development, Cordova

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