Ilia Reingold
Verified Expert in Engineering
Full-stack Engineer and Developer
Toronto, ON
Toptal member since September 11, 2025
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
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
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.
AI Engineer
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.
Senior Full-stack Developer
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.
Senior Software Developer
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.
Full-stack Developer
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.
Full-stack Developer
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.
Experience
Ilia Reingold Website
https://iliareingold.com/Warptracker
Rivalry Crypto Integration
https://www.rivalry.com/tokenSkills
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
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring