Freelance Fullstack Engineers in IllinoisFreelance Fullstack Engineers in Illinois
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J.D. Smith's avatar
J.D. Smith
Chicago, USA
VC deal partner helping Startups build info sites and MVPs
$1k+
Earned
2x
Hired
10
Followers
BOLT_EXPERT

Expert

BOLT_MENTOR_EXPERT

Mentor

VC deal partner helping Startups build info sites and MVPs
Cover image for Bolt Mentor Program
Bolt Mentor Program
0
28
Cover image for Startup Guru
Startup Guru
0
8
Cover image for Cross Realty Group | Luxury Real Estate
Cross Realty Group | Luxury Real Estate
0
8
Cover image for TokenD
TokenD
0
10
Fullstack Engineer(3)
Dorian Shekomba's avatar
Dorian Shekomba
Normal, USA
Full Stack | AI Engineer | CI/CD
6
Followers
Full Stack | AI Engineer | CI/CD
Cover image for Digital Wealth Partners - Gateway to Digital Investments
Digital Wealth Partners - Gateway to Digital Investments
0
3
Cover image for Developed a full-stack AI-powered trading
Developed a full-stack AI-powered trading platform that enables strategy creation, backtesting, live trade execution, and performance analytics. Designed modular architecture for strategy management, trade lifecycle tracking, and real-time market data processing. Implemented scalable REST APIs and WebSocket services to support low-latency trading and dynamic portfolio monitoring. Integrated AI models for signal generation, risk assessment, and trade optimization using historical and live market data. Built secure authentication, role-based access control, and ACID-compliant transaction handling to ensure financial data integrity. Deployed on cloud infrastructure with automated processes for high availability and continuous performance monitoring.
1
156
Cover image for Built a secure, full-stack online
Built a secure, full-stack online banking system enabling 24/7 account access, fund transfers, bill payments, and transaction management across web and mobile platforms. Designed RESTful APIs, optimized database queries, and implemented real-time transaction updates to ensure high performance, scalability, and seamless user experience. Implemented advanced security features including JWT authentication, multi-factor verification, encrypted data transmission (SSL/TLS), role-based access control, and fraud-prevention logic. Architected ACID-compliant transaction handling, audit logs, and production-ready deployment with Nginx and process management for high availability.
1
158
Cover image for Developed a high-performance reservation system
Developed a high-performance reservation system for airport parking, enabling users to quickly find, compare, and secure parking spots through an intuitive search and checkout flow. Architected a modular backend to manage inventory, pricing logic, booking validation, and automated confirmation workflows while ensuring data consistency across transactions. Integrated secure online payments, real-time availability updates, and automated email notifications to streamline the end-to-end booking experience. Implemented admin-level controls for managing locations, rates, promotions, and reporting insights. Optimized frontend performance, SEO structure, and server configuration to improve traffic acquisition, conversion rates, and overall platform reliability.
1
152
Fullstack Engineer(4)
Ethan Irimiciuc's avatar
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).
0
36
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.
0
44
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.
0
44
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.
0
69
Fullstack Engineer(4)
Dan Flanagan's avatar
Dan Flanagan
Chicago, USA
Backend & DevOps Expert | Golang, Terraform, C#
Backend & DevOps Expert | Golang, Terraform, C#
Cover image for Automated Risk Assessments for Businesses
Automated Risk Assessments for Businesses
0
3
Cover image for Created Advanced AI automations for data pipelines at Meta
Created Advanced AI automations for data pipelines at Meta
0
5
Cover image for Building a Scalable FinTech Backend Platform
Building a Scalable FinTech Backend Platform
0
4
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Fullstack Engineer(3)
Elliott Crifasi's avatar
Elliott Crifasi
proChicago, USA
Innovative Fullstack DevOps Engineer
Innovative Fullstack DevOps Engineer
Cover image for Nike Label Audit Tool
Nike Label Audit Tool
0
19
Cover image for Ultra: Site Health Monitor Nike.com
Ultra: Site Health Monitor Nike.com
0
12
Cover image for Atlanta Hawks: DevOps Transformation
Atlanta Hawks: DevOps Transformation
0
38
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Fullstack Engineer(2)
Don Hogan's avatar
Don Hogan
Chicago, USA
Cloud Engineer with 10 years delivering enterprise solutions
10
Followers
Cloud Engineer with 10 years delivering enterprise solutions
Cover image for First look at a multi-tenant SaaS platform I am building for...
First look at a multi-tenant SaaS platform I am building for dental equipment service companies. This Maintenance Management System (MMS) streamlines asset tracking, work order management, and parts inventory across multiple organizations. Built from scratch with enterprise-grade architecture including role-based access control, automated work order workflows, and real-time data synchronization. Tech Stack: React, Node.js/Express, PostgreSQL with Prisma ORM, Firebase Auth, Google Cloud Build, Google Cloud Run
20
236
Cover image for Priority based task manager
Priority based task manager
0
3
Cover image for Portfolio | IT Cloud Infrastructure Engineer
Portfolio | IT Cloud Infrastructure Engineer
0
3
Cover image for AI pantry tacking and meal planning
AI pantry tacking and meal planning
0
5
Fullstack Engineer(1)
Mo Omer's avatar
Mo Omer
Chicago, USA
I design, build, and scale websites, apps, and AI products!
TOP_INDEPENDENT

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I design, build, and scale websites, apps, and AI products!
Cover image for Senior Engineer training and Ruby on Rails refactoring
Senior Engineer training and Ruby on Rails refactoring
0
15
Cover image for Technical Article - Introducing Bonsai's New Terraform Provider
Technical Article - Introducing Bonsai's New Terraform Provider
0
10
Cover image for Go API Client for Bonsai.io
Go API Client for Bonsai.io
0
25
Cover image for Terraform Provider for Bonsai.io
Terraform Provider for Bonsai.io
0
17
Fullstack Engineer(1)