Ilia is available for hire

Ilia Reingold

Verified Expert in Engineering

Full-stack Engineer and Developer

Toronto, ON

Toptal member since September 11, 2025

Expertise

Interim CTOs Web Development Back-end Developers Full-stack Front End Artificial Intelligence Cloudflare OpenAI LLM RAG TypeScript JavaScript CSS

Bio

Ilia is a full-stack JavaScript engineer with experience building apps end-to-end, from intuitive front-end UIs to scalable back-end services. He has built scalable systems across gaming, healthcare, and business tech, including AI-driven networking tools at Boardy. Ilia brings a unique perspective on bridging technical depth with imaginative design by exploring creative applications of technology—including AI-driven workflows and indie game development.

Portfolio

Knoxus.AI Limited

React, Artificial Intelligence (AI), Front-end, CSS, REST APIs, TypeScript...

Boardy

Node.js, MongoDB, NestJS, Architecture, ChatGPT, OpenAI...

Rivalry

JavaScript, PHP, Node.js, Architecture, Headless CMS, Strapi, ChatGPT, OpenAI...

Experience

JavaScript - 11 years
TypeScript - 11 years
Node.js - 8 years
Cloudflare - 4 years
Ruby on Rails (RoR) - 4 years
SQLite - 4 years
MongoDB - 4 years
Claude - 3 years

Preferred Environment

TypeScript, Node.js

The most amazing...

...thing I've developed is an app for Warhammer that enables 40,000 players to track their tabletop games in real time, earning 30,000 unique visitors monthly.

Work Experience

Senior Front-End Engineer for AI Knowledge Platform

2025 - 2026

Knoxus.AI Limited

Built the interactive Reasoning Fabric graph editor in React — shipping manual graph creation, a persistent fullscreen editing view, and Shift+drag subgraph selection/dragging — giving analysts a direct-manipulation canvas.
Designed and delivered a reference-citation system for graph nodes and edges with inline edit, delete, and scratchpad controls, letting users trace any claim to its source without leaving the canvas.
Decomposed a 2,000+-line monolithic component into focused, reusable units — extracting a reusable graph-management hook, a canvas wrapper, and a tool-panel manager — net-deleting ~5,000 lines and making the graph canvas independently testable.

Technologies: React, Artificial Intelligence (AI), Front-end, CSS, REST APIs, TypeScript, Redux, Zustand, Python, UI Components, Vite, JavaScript, Google Maps API, Stripe API

AI Engineer

2024 - 2025

Boardy

Architected scalable microservices with NestJS/Node.js and BullMQ, improving job processing reliability and throughput.
Integrated multiple AI models, including OpenAI and Anthropic Claude, to deliver automated professional networking features.
Achieved over 80% test coverage with Vitest and implemented Playwright end-to-end tests, strengthening deployment confidence.

Technologies: Node.js, MongoDB, NestJS, Architecture, ChatGPT, OpenAI, Minimum Viable Product (MVP), Python, Document Processing, Web Development, AI Agents, API Integration, Back-end, APIs, Amazon Web Services (AWS), CSS, Full-stack, Full-stack Development, HTML, MySQL, Tailwind CSS, Security, Artificial Intelligence (AI), Large Language Models (LLMs), Retrieval-augmented Generation (RAG), Supabase, Vector Databases, Test-driven Development (TDD), CI/CD Pipelines, OpenAI API, REST APIs, Software Architecture, Technical Leadership, AI Voice Agents, Twilio, ElevenLabs Solutions, Front-end, AI Integration, CRM, Claude, Workflow Automation, Google Maps API, React Native, Stripe API

Senior Full-stack Developer

2020 - 2024

Rivalry

Boosted website loading speed by 70%, developed countless new features, and fixed many bugs.
Tracked bugs with Jira and communicated via Slack.
Shipped microservices via Cloudflare Workers, optimized Elasticsearch queries, and piloted Nuxt 2 to Nuxt 3 migrations.

Technologies: JavaScript, PHP, Node.js, Architecture, Headless CMS, Strapi, ChatGPT, OpenAI, Minimum Viable Product (MVP), Document Processing, Web Development, AI Agents, API Integration, Back-end, APIs, Amazon Web Services (AWS), CSS, Full-stack, Full-stack Development, HTML, MySQL, Tailwind CSS, Security, Artificial Intelligence (AI), Retrieval-augmented Generation (RAG), Test-driven Development (TDD), CI/CD Pipelines, OpenAI API, REST APIs, Mobile, Mobile Development, Software Architecture, Technical Leadership, Twilio, Front-end, Claude, Workflow Automation, Google Maps API, React Native, Stripe API

Senior Software Developer

2019 - 2020

Acies AI

Built Vue front-end applications with TypeScript and Vuex.
Developed a serverless back-end using AWS Lambda and API Gateway.
Created an Amazon S3-based file storage system with Amazon CloudFront CDN.

Technologies: Vue, AWS HA, TypeScript, Vuex, AWS Lambda, API Gateways, Amazon S3 (AWS S3), Amazon CloudFront CDN, Architecture, Minimum Viable Product (MVP), Document Processing, Web Development, AI Agents, API Integration, Back-end, APIs, Amazon Web Services (AWS), CSS, Full-stack, Full-stack Development, HTML, MySQL, Security, Artificial Intelligence (AI), Test-driven Development (TDD), CI/CD Pipelines, REST APIs, Mobile Development, Software Architecture, Technical Leadership, Front-end, Workflow Automation, React Native, Stripe API

Full-stack Developer

2018 - 2019

BookJane

Developed a React front end with Redux for state management.
Built a Ruby on Rails API back end with PostgreSQL, supporting thousands of users.
Implemented real-time notifications using Action Cable.

Technologies: Ruby on Rails 5, React, PostgreSQL, Redux, Minimum Viable Product (MVP), Document Processing, Web Development, API Integration, Back-end, APIs, CSS, Full-stack, Full-stack Development, HTML, MySQL, Security, Test-driven Development (TDD), CI/CD Pipelines, REST APIs, Mobile, Software Architecture, Technical Leadership, Front-end, Workflow Automation, DigitalOcean

Full-stack Developer

2014 - 2018

Independent

Developed React applications with TypeScript and modern build tools.
Implemented responsive web designs using HTML5 and CSS3.
Established CI/CD pipelines and development best practices.

Technologies: React, Vue, Ruby on Rails 5, Node.js, n8n, Minimum Viable Product (MVP), Document Processing, Web Development, API Integration, Back-end, APIs, CSS, Full-stack, Full-stack Development, HTML, MySQL, Security, Test-driven Development (TDD), CI/CD Pipelines, REST APIs, Mobile, Mobile Development, Software Architecture, Technical Leadership, Front-end

Experience

Ilia Reingold Website

https://iliareingold.com/

I built an app that uses five AI agents working 24/7 to bring users the most relevant tech stories. Each specialist agent monitors different sources, and our editor synthesizes the best insights, delivering free tech newsletters daily.

Warptracker

Warptracker is a custom full-stack app that helps players track Warhammer Pariah Nexus missions, manage their cards, and play with friends. It offers full multiplayer support, 30,000 unique users monthly, a one-second page load time, and 100% uptime.

Rivalry Crypto Integration

https://www.rivalry.com/token

Rivalry pivoted to being a crypto company, which meant integrating wallets and revamping the entire front end. I helped steer a full-blown front-end pivot and aided users in connecting with a custom token. We also built a new set of pages to explain the value it would bring to users.

Skills

Libraries/APIs

Node.js, Vue, React, OpenAI API, REST APIs, Google Maps API, Stripe API, Vuex, Playwright

Tools

Claude, ChatGPT, Amazon CloudFront CDN, n8n, Vitest, Amazon CloudWatch, Amazon Cognito

Languages

TypeScript, JavaScript, CSS, HTML, Python, PHP

Frameworks

Tailwind CSS, React Native, Ruby on Rails (RoR), NestJS, AWS HA, Ruby on Rails 5, Nuxt.js, Redux, Laravel

Paradigms

Test-driven Development (TDD), Mobile Development

Platforms

Amazon Web Services (AWS), Mobile, Twilio, DigitalOcean, AWS Lambda, AWS IoT, Shopify

Storage

MongoDB, MySQL, SQLite, PostgreSQL, Amazon S3 (AWS S3), Redis, Elasticsearch, Amazon DynamoDB

Other

Cloudflare, Architecture, CTO, Fractional CTO, OpenAI, Minimum Viable Product (MVP), Web Development, AI Agents, API Integration, Back-end, APIs, Full-stack, Full-stack Development, Security, Artificial Intelligence (AI), Large Language Models (LLMs), Resend, Retrieval-augmented Generation (RAG), Supabase, Vector Databases, CI/CD Pipelines, Software Architecture, Technical Leadership, AI Voice Agents, ElevenLabs Solutions, Front-end, AI Integration, CRM, Workflow Automation, Headless CMS, Strapi, Document Processing, Data Migration, API Gateways, BullMQ, WebSockets, OpenRouter, Zustand, UI Components, Vite

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