Freelance Frontend Engineers in Illinois

Freelance Frontend Engineers in IllinoisFreelance Frontend Engineers in Illinois

Projects People

Full-Stack Engineer | MVP Builds, UI/UX & Systems

New to Contra

Full-Stack Engineer | MVP Builds, UI/UX & Systems

Cover image for Cut call initiation to 1-2 clicks, zero lost leads

Cut call initiation to 1-2 clicks, zero lost leads

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Cover image for Rebuilt real-time video conferencing system in 2 weeks

Rebuilt real-time video conferencing system in 2 weeks

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Cover image for Production-ready interactive platform shipped in

Production-ready interactive platform shipped in under one week — full design through deployment — at ~$30 total cost versus an estimated $10–20K agency quote. Built a highly interactive UX-focused platform featuring context-aware scroll indicators, a persistent non-disruptive audio player, frictionless minimal navigation, and copy-friendly UX for structured content. Full ownership across design, development, and deployment using an AI-augmented workflow. MY ROLE - Full ownership — design, development, deployment - AI-augmented workflow using ChatGPT + GitHub Copilot KEY FEATURES - Context-aware scroll indicators - Persistent, non-disruptive audio player - Frictionless minimal navigation - Copy-friendly UX for lyrics and structured content RESULTS - Full production build in under one week - ~$30 total build cost vs $10–20K agency estimate - Live in production at noahhenrymusic.com (http://noahhenrymusic.com)

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Cover image for Reduced engineering dependency for customer

Reduced engineering dependency for customer configuration — rebuilt a deprecated portal into a flexible self-service admin system. Customers now configure real-time workflows without developer involvement. Rebuilt a legacy platform into a modular, extensible admin system with a queue builder using attribute-based routing logic, hours-of-operation management with exception handling, and a scalable architecture designed for long-term growth. MY ROLE - Led system design and frontend architecture - Implemented core admin interfaces and workflows - Collaborated on backend extensions - Drove customer adoption of new tooling DELIVERABLES - Queue builder with attribute-based routing logic - Hours-of-operation management with exceptions - Modular, extensible admin architecture RESULTS - Reduced engineering dependency for customer configuration changes - Improved scalability of onboarding and customer support workflows - Customers self-configure real-time workflows without developer involvement

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Frontend Engineer(6)

Ethan Irimiciuc

Arlington Heights, USA

AI Automation Engineer | Python, OpenAI, Bots & Scraping

New to Contra

AI Automation Engineer | Python, OpenAI, Bots & Scraping

Cover image for Flagspill is an anonymous social

Flagspill is an anonymous social platform where users share short takes on relationship and dating situations, then vote them red flag, green flag, or contested "yellow flag." It's Reddit meets a polling app, focused on the moments people overthink and want a second opinion on. Features: Anonymous post and comment system with optimistic vote updates Multi-feed browsing (Hot, New, Top Today, Top Week, All Time) Yellow flag detection for contested posts where the community is split Responsive masonry grid layout that adapts cleanly across devices Real-time engagement metrics on every post Where it gets interesting is the moderation. Flagspill runs a multi-stage moderation pipeline using regex hard rules, heuristic spam and gibberish detection, and GPT-4o-based content review with rate limiting. Every submission goes through this pipeline before hitting the database, keeping the platform safe and useful at scale. Tech stack: React, TypeScript, Tailwind, Supabase for database and auth, OpenAI GPT-4o for moderation, deployed on Vercel. Built and shipped solo. Live at flagspill.com (http://flagspill.com).

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Cover image for Wildlife Quiz Platform for K-12: Enhance Classroom Learning

BioTrack is a wildlife education web platform built to help K-12 teachers create custom animal-themed quizzes, manage classes, and track student progress on biology learning. Teachers can build flashcard sets, assign quizzes to specific classes, and even request new animals to be added to the platform's database. Features: Teacher dashboard with class, student, assignment, and report tracking Custom quiz builder powered by an animal/wildlife database Classroom management with student rosters and assignment delivery Request Animal system for crowdsourcing new content to the platform Authentication and role-based access for teachers and students Built with React and TypeScript on the frontend, FastAPI and Python on the backend, with PostgreSQL for data persistence and a REST API connecting everything. This was a collaborative project I worked on with a team of four as part of a university software engineering course. I handled significant portions of the frontend architecture and API integration, working closely with backend and design teammates on a 12-week build cycle. Shipped as a working app deployed for active classroom users.

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Cover image for Steam Market Bot is an

Steam Market Bot is an automated trading platform for the CS2 skin marketplace. It scans thousands of Steam Community Market listings in real time, detects underpriced items, and surfaces profitable buy opportunities through a clean dashboard. The CS2 skin market moves on volume and speed. Manual traders miss opportunities because prices shift in seconds. This bot solves that by handling the scanning, monitoring, and decision logic continuously. Features: Real-time market scanning across thousands of listings Live dashboard with balance, active orders, scan cycles, and bot status Configurable item filters (float ranges, sticker conditions, price thresholds) Warm-up mode to safely initialize bot sessions without triggering rate limits Live activity log so users can audit every action the bot takes Built with FastAPI, React, TypeScript, Python, Selenium, and the Steam Community Market API. Deployed with a PostgreSQL backend for trade history and analytics. This was a personal project that turned into a real tool. I built it to handle my own CS2 trading and shipped a polished version for others to use.

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Cover image for MixerAI is a Chrome extension

MixerAI is a Chrome extension that consolidates ChatGPT, Claude, Gemini, and Perplexity into a single dashboard. Most heavy AI users are paying for 2-4 subscriptions and constantly switching tabs to use the right model for the right task. MixerAI fixes that. Features: Unified connection status for all major AI services in one panel Smart subscription tracking so you can see which plans you're on across providers Plan recommendation engine that suggests Free vs Pro vs Max tiers based on your usage patterns Single task input that routes your prompt to the best-suited AI for the job Built with TypeScript, React, Chrome Extensions API, Tailwind, and integrations with OpenAI, Anthropic, Google, and Perplexity APIs. This project came from frustration with my own AI tool sprawl: four tabs open, two paid subscriptions I wasn't fully using, and no system for deciding which model to ask. MixerAI is the tool I built to solve that for myself, and now I'm shipping it for others.

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Frontend Engineer(2)

Web development expert Full stack with Front-End focus

6: Followers

Web development expert Full stack with Front-End focus

Cover image for Front-End Development for Digitas AI Platform

Front-End Development for Digitas AI Platform

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Cover image for Vans 3D Shoe Customization Expansion

Vans 3D Shoe Customization Expansion

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Cover image for Launch of The Archive Project Digital Platform

Launch of The Archive Project Digital Platform

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Cover image for Modernizing a Complex Real Estate & Ecommerce Platform

Modernizing a Complex Real Estate & Ecommerce Platform

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Frontend Engineer(3)

Full stack developer | DevOps | Web & Mobile App

New to Contra

Full stack developer | DevOps | Web & Mobile App

Cover image for Financial Service Platform Enhancement for HubFinance

Financial Service Platform Enhancement for HubFinance

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Cover image for CoachHub - Personal Coach Hiring Mobile App

CoachHub - Personal Coach Hiring Mobile App

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3

Cover image for Cash Management App

Cash Management App

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Cover image for Structure Family - Web Designer

Structure Family - Web Designer

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Frontend Engineer(1)

Product Designer & Creative Technologist

$10k+: Earned

2x: Hired

5.0: Rating

57: Followers

Expert

Product Designer & Creative Technologist

Cover image for Magic Path Design Challenge —

Magic Path Design Challenge — Community Vote Winner Audio SaaS Landing Page | April 2026

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Cover image for St. Cloud Huskies Enamel Pin Design

St. Cloud Huskies Enamel Pin Design

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Cover image for Alright! here's my submission for

Alright! here's my submission for the Ship & Sell Remixathon challenge! This was a fun hackathon because I didn't know what to make. So here it is! Time Matters is a family screen time manager designed for parents and kids. It helps families set daily screen time limits, track usage, log behaviors, review weekly activity, and keep rules clear in one simple app. Parents can manage child profiles, switch into parent mode with a passcode, and review progress, while kids get a calm, easy-to-understand view of their remaining time and activity. It’s built for families who want a gentler, more organized way to manage device time without making screen time feel stressful or overly strict. https://family-screen-time-tracker-360.created.app https://x.com/girtonian/status/2051168990693564467 https://www.linkedin.com/posts/jonathangirton_i-built-a-thing-for-the-anything-remixathon-ugcPost-7456941375582785536-iGoX?utm_source=share&utm_medium=member_desktop&rcm=ACoAAARnTb0Bo4Ll-0KqNAhBCBgSGoGtNJCoPns

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Cover image for INK Bitcoin Ordinals Community Apparel Design

INK Bitcoin Ordinals Community Apparel Design

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Frontend Engineer(1)

VC deal partner helping Startups build info sites and MVPs

$1k+: Earned

1x: Hired

9: Followers

Expert

Mentor

VC deal partner helping Startups build info sites and MVPs

Cover image for TokenD

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Cover image for Bolt Mentor Program

Bolt Mentor Program

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Cover image for Startup Guru

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Cover image for Cross Realty Group | Luxury Real Estate

Cross Realty Group | Luxury Real Estate

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Frontend Engineer(1)

Data-driven web designer & developer. Crafted to impress.

$1k+: Earned

1x: Hired

2: Followers

Data-driven web designer & developer. Crafted to impress.

Cover image for MoeTatts

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Cover image for EricDOA Fansite

EricDOA Fansite

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Cover image for Reimagine Mock Site

Reimagine Mock Site

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Frontend Engineer(1)

Senior software engineer

New to Contra

Senior software engineer

Cover image for Sdoge 3D Model website

Sdoge 3D Model website

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4

Cover image for SUPERHOLD Website

SUPERHOLD Website

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Cover image for 21TSI projects

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Cover image for igloo project

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Frontend Engineer(4)