Oliver Walerys
Verified Expert in Engineering
Single-page Applications (SPAs) Developer
Amsterdam, Netherlands
Toptal member since October 14, 2019
Oliver is a senior software architect and full-stack web developer with seven years of experience delivering software from quick-release MVPs to million-user web apps. His experience spans various industries, including education, travel, health, and social media. Oliver prides himself on reliable communication and high-quality deliverables.
Portfolio
Experience
- Vue - 6 years
- Single-page Applications (SPAs) - 5 years
- ECMAScript (ES6) - 5 years
- Minimum Viable Product (MVP) - 4 years
- TypeScript - 4 years
- Technical Leadership - 3 years
- Node.js - 3 years
- Web Scraping - 2 years
Availability
Preferred Environment
Visual Studio Code (VS Code), MacOS, TypeScript, JavaScript, React, Vue, Node.js, PHP, DigitalOcean
The most amazing...
...software I architected was a web-based, real-time collaborative learning tool for digital training during the pandemic.
Work Experience
Full-Stack Software Architect
Multinational Management Consultancy
- Architected the next-gen multiplayer web platform to decrease response times by 80% on a collaborative remote learning tool.
- Coordinated with product and design to rebuild a legacy app for a scaled delivery.
- Mentored developers to transition to web development with Vue.js.
Full-stack Software Consultant
Codename Labs
- Created a dashboard-style platform for restauranteurs to monitor the performance of their online delivery orders 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.
Full-stack TypeScript Developer
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.
Full-stack Web Developer and Initiative Owner
FlightHub
- Overhauled a failure-prone, outdated, and mission-critical revenue calculator to reduce annual errors by over 90%, resulting in savings of $500,000.
- Developed a user-friendly single-page web app for which we hired a team of 12 quality assurance agents.
- 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.
Experience
Acelerate
https://acelerate.io66Agency
Captain's Numbers
Certifications
Internet Business Associate
CIWcertified
Skills
Libraries/APIs
Node.js, Vue 2, Vuex, Vue, React, InversifyJS, Puppeteer, Plaid API, REST APIs, Sockets
Tools
Sisense, NPM, Git, GitHub, Plaid, Webpack, Webpack 4, Flink, PhpStorm, Vagrant, Composer
Languages
PHP, TypeScript, CSS, PHP 7, ECMAScript (ES6), HTML, ES8, ES7, SQL, JavaScript, HTML5, Dart, Python
Frameworks
JSON Web Tokens (JWT), Laravel, Bootstrap 3, Tailwind CSS, Next.js, Bootstrap, Flutter, Electron, Nuxt.js, Express.js, Angular, Flask
Paradigms
RESTful Development, Reactive Programming, REST, Continuous Integration (CI), Continuous Delivery (CD), Responsive, Testing, Agile, Mobile Development, DevOps, Cross-platform
Platforms
Linux, Docker, Ubuntu, Visual Studio Code (VS Code), DigitalOcean, iOS, Firebase, Amazon Web Services (AWS), Google Cloud Platform (GCP), Mapbox, Azure, MacOS, Ubuntu Linux, Drone CI, Kubernetes
Storage
JSON, MySQL, PostgreSQL, Amazon S3 (AWS S3), Databases, Redis, MongoDB, Memcached, Google Cloud
Other
Front-end, Vue Router, Single-page Applications (SPAs), Web Scraping, Web Development, Full-stack, Containers, Integration Testing, Responsive Web Apps, APIs, Responsive UI, Proxies, Minimum Viable Product (MVP), Technical Leadership, Cloud, Software Architecture, Queue Management, Mobile App Development, WebSockets, Architecture, Maps, Webhooks, CTO, Real-time Data, Development
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