Pavel Pachkovsky, Developer in Bialystok, Poland
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Pavel Pachkovsky

Verified Expert  in Engineering

Software Developer

Bialystok, Poland
Toptal Member Since
January 29, 2016

Pavel is a full-stack engineer with more than 13 years of experience developing web applications with Ruby on Rails and JavaScript. He can build responsive and functional front ends, secure scalable back ends, and set up automated deployment processes. Pavel can both manage a team of developers and work under direction.


Broker Buddha
AngularJS, Ruby on Rails (RoR), GraphQL, MongoDB, Angular, NgRx, Terraform...
Azati Corporation
Docker, AngularJS, Ruby on Rails (RoR), Ruby
Snapdocs, Inc.
AngularJS, Ruby on Rails (RoR), Ruby




Preferred Environment

Jira, Git, RubyMine, OS X, Ruby on Rails (RoR), Amazon Web Services (AWS)

The most amazing...

...project I've worked on is a top 60 Y Combinator company for the mortgage industry, with a complicated architecture and sophisticated business processes.

Work Experience

Full-stack Software Engineer

2017 - 2019
Broker Buddha
  • Led the development of a high-performance, reliable, and secure Rails-based back end.
  • Participated actively in building and maintaining a SPA front end with dozens of pages full of complex business logic.
  • Automated the deployment with Elastic Beanstalk and Terraform.
  • Bootstrapped a new GraphQL API that allowed making a majority of server requests run in less than 0.2ms.
  • Established E2E testing with Capybara, which reduced the number of bugs to almost zero.
  • Contributed actively to setting up a CI/CD pipeline.
Technologies: AngularJS, Ruby on Rails (RoR), GraphQL, MongoDB, Angular, NgRx, Terraform, CircleCI, Docker

Software Developer

2015 - 2017
Azati Corporation
  • Created the back-end for a mobile application and managed the complete project cycle.
  • Worked on a marketplace for used car parts in Germany.
Technologies: Docker, AngularJS, Ruby on Rails (RoR), Ruby

Software Developer

2012 - 2015
Snapdocs, Inc.
  • Built a massive project with sophisticated business logic used by thousands of enterprise users daily.
  • Developed accounting functionality integrated with QuickBooks Online.
  • Worked on a multi-tier architecture of the project.
  • Implemented project billing.
Technologies: AngularJS, Ruby on Rails (RoR), Ruby

Software Developer

2013 - 2013
  • Built software for a home automation (powered by Z-Wave) hub based on Raspberry Pi.
  • Created a JuJu charm for deploying Rails applications in collaboration with a team from Canonical.
  • Worked on a web education platform for a Belgian university.
Technologies: Chef, Ruby on Rails (RoR), Ruby

Software Developer

2009 - 2012
  • Worked on a control panel for deploying and managing popular software stacks in AWS.
  • Built an online tool for searching and analyzing genome sequence data.
  • Created a plugin for Sublime Text with thousands of installations.
Technologies: Ruby on Rails (RoR), Ruby

Broker Buddha

Broker Buddha helps insurance brokers and agents win more business by moving the application and renewal process into an interactive, customer-friendly online experience.

I led the software development process and handled back- and front-end development and deployment automation.

SnapDocs simplifies mortgages by moving the process online. I was the first developer here and for a long time the only one. To a certain point, I built every single piece of its functionality.

Some of the challenging things: billing, integration with Quickbooks, Google, Mixpanel and other APIs, responsive email layout, zero-downtime deployment, etc.

Technologies used include Ruby on Rails, a slice of the AWS stack, Opscode Chef, and AngularJS.

Social Media Link

Social Media Link (SML) is the leading advocacy activation company that amplifies social media conversation for brands. SML makes it easy for brands to activate impactful and trusted reviews and recommendations across social media, triggering action and leading consumers through the path to purchase.

Mercer Financial Wellness

Custom-designed user-friendly financial solutions to simplify people's life and give them personalized insights to make smart money moves today, for a brighter tomorrow.


FundRx connects physicians with early stage healthcare companies in the fields they know best.


A mobile application with a modern approach for receiving urgent, contextual messages on mobile devices. I came up with the idea and controlled the whole development process, personally working on the back end, developing integrations with Parse PUSH and Amazon SQS, and building the website.

Technologies used include Ruby on Rails, AngularJS, Docker, SQS, Parse, and MongoDB.

nCube Home

nCube is a smart home system that lets tailor a money-saving solution to suit ones needs. I built a Ruby library to communicate to a Z-Wave devices and invented a network architecture two-way communication between nCube hubs and back-end servers.

Technologies used include Ruby on Rails, OpenVPN, and Z-Wave library.

The SequenceBase Research Portal is a web-based access point for comprehensive patent sequence searching. I developed a scalable architecture for performing searches on a database of biological patents.

Technologies used include Ruby on Rails, RabbitMQ, Google Wallet, NCBI Blast, and Sphinx.


Ruby, SQL, GraphQL, CSS, HTML, JavaScript, SAML, Go


AngularJS, Ruby on Rails (RoR), Bootstrap, Capybara, Juju, Ember.js, Angular


Mixpanel API, Twilio API, Stripe API, QuickBooks API, jQuery, HelloSign API, Google API, Backbone.js, Prawn, NgRx, NgRx/store


wkhtmltopdf, Capistrano, RSpec, RabbitMQ, Chef, Terraform, RubyMine, Git, Jira, Ansible, CircleCI


AWS Elastic Beanstalk, Amazon Web Services (AWS), Linux, Docker, Mailgun, OS X


MySQL, PostgreSQL, Redis, MongoDB, CouchDB


PDF, APIs, RESTful Web Services, HexaPDF, SAML-auth, Apache Cassandra, Workflow

2008 - 2013

Bachelor's Degree in Computer Science

Yanka Kupala (Grodno State University) - Grodno, Belarus