Publication
Option/Maybe, Either, and Future Monads in JavaScript, Python, Ruby, Swift, and Scala
https://www.toptal.com/developers/javascript/option-maybe-either-future-monads-js
Alexey is currently unavailable
Alexey Karasev
Verified Expert in Engineering
Functional Programming Developer
Moscow, Russia
Toptal member since June 26, 2017
Bio
Alexey is proficient or more so in at least ten programming languages. He's obsessed with studying different approaches and loves comparing the best ones because he wants to start his own software company one day. During his software career, Alexey was shocked about how many man hours go into bug-fixing and refactoring. Thus he uses best approaches from functional programming and OOP to avoid bugs focus on what really matters—feature delivery.
Portfolio
Storiqa
React, Ruby, Rust
Friends and Guests
Ruby on Rails (RoR), Ruby, React
Subspace
React, Scala
Experience
- JavaScript - 3 years
- React - 3 years
- Ruby - 3 years
- Rust - 2 years
- Scala - 2 years
- iOS - 1 year
- Swift - 1 year
- Android - 1 year
Preferred Environment
Git, Visual Studio Code (VS Code), Docker, MacOS
The most amazing...
...thing I've created is a full featured e-commerce system backed up by custom payments system including crypto and fiat transactions
Work Experience
CTO
2017 - 2019
Storiqa
- Created an eCommerce system from scratch using microservices architecture.
- Built a payments system with cryptocurrency and fiat systems.
- Created an online testing platform for new hires.
Technologies: React, Ruby, Rust
Senior Full-stack Developer
2016 - 2018
Friends and Guests
- Aided in the deployment of the product to beta release as a front-end (React) and back-end (Ruby on Rails) developer.
- Led several React, Angular, and Ruby on Rails consulting projects, namely: Egghead.io, Procore.com, Everwise.com, and more.
- Developed and led a team for a mobile app (fashion) in React Native.
- Created a web data scraper in Rust.
Technologies: Ruby on Rails (RoR), Ruby, React
Full-stack Developer
2017 - 2017
Subspace
- Created a new programming language parser in Scala.
- Built a live D3.js visualization of class diagram, sequence diagram, and connectivity.
- Updated a back-end that implemented a Git system (analog of GitHub).
Technologies: React, Scala
Microservices Developer
2017 - 2017
Orpiva Ltd
- Developed a stable service for a URL shortening service, which is used internally for user convenience and tracking behavioral metrics.
- Stabilized an existing Elasticsearch service (i.e., for gracefully handling network partitions of used microservices).
Technologies: Scala
Senior Mobile Developer
2016 - 2017
Secret Lab
- Led a team of two programmers in an iOS app project for the major bank.
- Developed an Android app for parents where they can view student marks and school schedules.
Technologies: Android, Objective-C, Swift, iOS
Full-stack Developer
2015 - 2016
Roi.rs
- Sped-up a Ruby on Rails server response time 5-fold.
- Created a Go server and deployed a Hadoop cluster for a user behavior tracking system.
- Assisted in the roll-out a new front-end (AngularJS).
Technologies: Hadoop, Go, Ruby on Rails (RoR), Ruby, AngularJS
Experience
Storiqa
The project successfully raised approximately US$25 million in ICO.
My goal as a CTO was to hire and lead a team to build two big projects from scratch: an eCommerce platform and a cryptocurrency payments system.
Technologies: Rust, Ruby, React, PostgreSQL, RabbitMQ
My goal as a CTO was to hire and lead a team to build two big projects from scratch: an eCommerce platform and a cryptocurrency payments system.
Technologies: Rust, Ruby, React, PostgreSQL, RabbitMQ
Everwise
This is a startup focused on SaaS for talent development. The core task for me and my team was to migrate a huge existing codebase from Angular to React. We successfully completed this task and removed each and every Angular line of code, while maintaining existing features and adding new features with React.
Technologies: React, Angular, Ruby on Rails
Technologies: React, Angular, Ruby on Rails
Egghead.io
http://egghead.ioThis is a massive open online course (MOOC) that's mainly focused on JavaScript. I'm helping them migrate from Angular to React and building version 2 of the application.
Technologies: Angular, React, Redux, Rails
Technologies: Angular, React, Redux, Rails
Diary
This is an Android app for tracking the schedules and the grades of school children. I developed this app from scratch.
Demo: https://youtu.be/NyLdNLhAKmU
Demo: https://youtu.be/NyLdNLhAKmU
Friends and Guests: Connecting Hosts and Guests™
Friends and Guests is a niche competitor of Airbnb. For their project, I worked as a full-stack programmer—mainly focused on the development of new features
Technologies: Ruby on Rails, React, PostgreSQL
Technologies: Ruby on Rails, React, PostgreSQL
Wallet
This is a startup project from the number one Russian bank for storing sensitive document information (IDs, discount cards, bank cards, and more). I was a lead developer on this project.
Demo: https://youtu.be/LHq8e83A4pA
Demo: https://youtu.be/LHq8e83A4pA
Spylight
https://youtu.be/7txNqxC__IgThis is a mobile fashion app for browsing different looks for celebrities. I was a lead developer on this project.
Procore.com
http://procore.comThis is a unicorn startup that provides a SaaS for the construction industry. I helped the Procore team to add React components for a module that draws up the floor plans in the app.
Technologies: React, Redux, Rails.
Technologies: React, Redux, Rails.
Madrone Software & Analytics, Inc.
This is a startup that offers SaaS for hedge fund managers. I was responsible for implementing the new features in the front-end and back-end.
Technologies: React, Flux, Rails
Technologies: React, Flux, Rails
DBEncoder.scala
This type-safe encoder and decoder from case classes lists tuples (the field name and value). For every possible case class, you get a one-line decode and encode functionality that is entirely type-safe, thus eliminating a lot of boilerplates when you want to save a case class entity to a key-value store or read from it.
Education
2008 - 2011
Level III Charterholder in Finance
CFA Institute - USA
2006 - 2008
Master's Degree in Economics
New Economic School - Moscow, Russia
2002 - 2007
Specialist Degree in Computer Science
Moscow State University - Moscow, Russia
Skills
Libraries/APIs
React, Http4s
Tools
Construction Audit Tracking System (CATS), Amazon Elastic Container Service (ECS), Git
Languages
JavaScript, Scala, Swift, Ruby, Java, Objective-C, Go, Rust
Frameworks
Redux, Ruby on Rails (RoR), AngularJS, Play, Hadoop
Platforms
Android, Docker, iOS, MacOS, Visual Studio Code (VS Code)
Storage
Redis, PostgreSQL, MongoDB, Cassandra
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