Oliver Walerys, Single-page Applications (SPA) Developer in Montreal, QC, Canada
Oliver Walerys

Single-page Applications (SPA) Developer in Montreal, QC, Canada

Member since April 17, 2019
Oliver is a passionate full-stack web and cross-platform mobile developer with years of experience delivering software from MVPs to million-user web apps. His experience spans a variety of industries, including travel, medical, and social media. He prides himself on regular communication and high-quality deliveries.
Oliver is now available for hire


  • Codename Labs
    Firebase, Cross-platform, Dart, Flutter, PostgreSQL, MySQL, Laravel...
  • Tactio Health Group
    JSON Web Tokens (JWT), InversifyJS, Express.js, Node.js, ES8, Vue.js, TypeScript
  • FlightHub
    Sisense, MySQL, Single-page Applications (SPA), Vue.js, ECMAScript (ES6)...



Montreal, QC, Canada



Preferred Environment

VS Code, Ubuntu Linux, MacOS

The most amazing...

...system I've refactored was a mission-critical profit margin calculator with dozens of complex business rules.


  • Full-stack Software Consultant

    2016 - PRESENT
    Codename Labs
    • Created a dashboard-style platform for restauranteurs to monitor their online delivery order performance across marketplaces.
    • Prototyped a cross-platform mobile application for the aviation industry to digitize cockpit activities for small-plane pilots.
    • Developed order-processing software for a uniforms distributor that reduced order processing time by 90% and handled over $10,000 in sales volume per month.
    • Overhauled a leading Canadian influencer advertising platform.
    Technologies: Firebase, Cross-platform, Dart, Flutter, PostgreSQL, MySQL, Laravel, Single-page Applications (SPA), React, Vue.js, ECMAScript (ES6), Node.js, TypeScript
  • Full-stack TypeScript Developer

    2018 - 2019
    Tactio Health Group
    • Architected a modular single-page-app stack to replace legacy web architecture.
    • Mentored junior developers to become capable contributors to the new web stack while codifying best practices.
    • Audited back-end security practices and initiated a major rewrite to ensure strict compliance with health data regulations.
    Technologies: JSON Web Tokens (JWT), InversifyJS, Express.js, Node.js, ES8, Vue.js, TypeScript
  • Full-stack Web Developer, Initiative Owner

    2016 - 2018
    • Overhauled a failure-prone, outdated, and mission-critical revenue calculator to reduce $500,000 in annual errors by over 90%.
    • Developed a user-friendly single-page web app for which a team of 12 quality assurance agents was hired.
    • Optimized an internal booking search tool to reduce average response time from seven seconds to 300 milliseconds with a significant MySQL load decrease.
    • Led the initial implementation of BI by developing real-time dashboards, administering SiSense, and training other teams for it.
    • Balanced expectations across departments while writing specifications and delivering quality.
    Technologies: Sisense, MySQL, Single-page Applications (SPA), Vue.js, ECMAScript (ES6), JavaScript, PHP


  • Acelerate (Development)

    Acelerate empowers restauranteurs to make sense of their delivery business through a bespoke platform that gives them visibility on performance across food delivery marketplaces.

  • 66Agency (Development)

    Canada's leading influencer advertising platform allows marketers to partner with top Instagram talent across the country.

  • Captain's Numbers (Development)

    Captain's Numbers is a mobile application designed to make flight-planning easier for small-plane pilots.


  • Languages

    PHP 7, ECMAScript (ES6), SQL, JavaScript, CSS, HTML, Dart, PHP, TypeScript, ES8, ES7
  • Frameworks

    Laravel, Bootstrap 3, Next.js, Bootstrap, Flutter, Express.js, JSON Web Tokens (JWT), Angular
  • Libraries/APIs

    Vue.js 2, Vuex, Vue.js, Node.js, React, Puppeteer, InversifyJS
  • Tools

    NPM, Git, VS Code, Sisense, PhpStorm, Vagrant, Composer
  • Paradigms

    RESTful Development, Reactive Programming, Agile, REST, Mobile Development, Cross-platform
  • Platforms

    Linux, Mac OS, Ubuntu, Visual Studio Code, iOS, Firebase, MacOS, Ubuntu Linux, Docker
  • Storage

    JSON, MySQL, PostgreSQL, Google Cloud, AWS S3
  • Industry Expertise

    Web Development
  • Other

    Front-end, Vue-router, Single-page Applications (SPA), RESTful APIs, Web Scraping, Queue Management, Mobile App Development


  • Internet Business Associate

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