Freelancers using PostgreSQL in MississaugaFreelancers using PostgreSQL in Mississauga
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Rumman Sadiq's avatar
Rumman Sadiq
proMississauga, Canada
Full-Stack AI Engineer | LLM Agents & React/Node
New to Contra
Full-Stack AI Engineer | LLM Agents & React/Node
Cover image for Pupilfirst – Open-Source LMS
Pupilfirst – Open-Source LMS
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0
Cover image for Lalechet — Kosher Travel &
Lalechet — Kosher Travel & Concierge Booking Platform Category: Travel Booking Platform / Tour Operator Suite Tech Stack: Ruby on Rails 7, PostgreSQL, Sprockets, Devise, Delayed Job, Paperclip, Savon (SOAP), Amadeus GDS, Gimmonix, Travel Guard, Duffel, Google Maps + Places, Dynalink PBX, QuickBooks Online, OpenAI, Pusher, Sendgrid, Twilio, Stripe, AWS S3 Our Contributions: Full Stack Lalechet is a full-service travel concierge platform built for the Jewish travel market, handling everything from custom itineraries and mekomos hakedoshim (holy sites) tours to group getaways, charter flights, and private jet bookings. We built the platform end-to-end — a Rails 7 application integrating live GDS inventory through Amadeus and Gimmonix, real-time flight booking via Duffel, and travel insurance through Travel Guard, all wrapped in a secure Devise-powered authentication layer. 🔗 https://lalechet.com/website
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Cover image for Ella AI – AI Marketing Assistant
Ella AI – AI Marketing Assistant
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3
Cover image for Coloc Housing – Coliving Platform
Coloc Housing – Coliving Platform
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0
PostgreSQL(3)
Aku Alatao's avatar
Aku Alatao
Toronto, Canada
Blockchain & Fullstack Solutions Expert
1x
Hired
6
Followers
Blockchain & Fullstack Solutions Expert
Cover image for Meme Token Launchpad
Meme Token Launchpad
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10
Cover image for Token Staking
Token Staking
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8
Cover image for ICO Presale for any blockchains
ICO Presale for any blockchains
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8
Cover image for Blockchain Betting Game
Blockchain Betting Game
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6
PostgreSQL(1)
Faisal Usmani's avatar
Faisal Usmani
Toronto, Canada
Senior engineer specializing in full-stack and blockchain.
Senior engineer specializing in full-stack and blockchain.
Cover image for PartnerStack
PartnerStack
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15
Cover image for Squirrel Wallet
Squirrel Wallet
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27
Cover image for Parallel Trading Card Game
Parallel Trading Card Game
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27
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PostgreSQL(1)
Antonio Coppe's avatar
Antonio Coppe
Toronto, Canada
Builds fast SaaS with React, Node, AI. Ships MVPs in weeks.
Builds fast SaaS with React, Node, AI. Ships MVPs in weeks.
Cover image for Full-Stack Engineer --> Grant Navigator Built an AI-assisted...
Full-Stack Engineer --> Grant Navigator Built an AI-assisted platform that helps Italian SMEs discover, qualify, and track government grants across multiple public sources. What I delivered: • Multi-source grant aggregation and structured search • AI-powered relevance scoring and natural-language summaries • User accounts, saved opportunities, and onboarding flow • Clean UI for browsing funding programs and eligibility filters Impact: • Centralizes scattered public funding data into one interface • Makes complex grant language understandable and actionable • Designed for real startup and SMB workflows Tech: Next.js, TypeScript, Supabase, Vercel, OpenAI API What this project shows: Product execution, data aggregation, UX clarity, and practical AI integration to solve a real information-navigation problem.
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Cover image for Full-Stack Engineer --> FuseQuote Built the quoting and sour...
Full-Stack Engineer --> FuseQuote Built the quoting and sourcing platform used by European electrical contractors to automate price comparison and generate client-ready proposals. What I delivered: • Supplier scraping and price aggregation • Quote builder with markup and tax logic • Clean proposal exports and approval workflow • Authentication, roles, and secure data flow • Deployment pipeline and monitoring setup Impact: • Reduced quoting time from hours to minutes • Eliminated manual supplier price checks • Increased win rate by making pricing faster and clearer Tech: Next.js, TypeScript, Python, Supabase, Stripe, Docker, GitHub Actions, Vercel What this project shows: Product thinking, data processing, real business automation, and production-grade execution end to end.
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Cover image for Full-Stack Engineer --> Riva dei Coz Booking Platform Built ...
Full-Stack Engineer --> Riva dei Coz Booking Platform Built a booking platform for a boutique hospitality business, letting guests reserve stays, pay online, and manage reservations smoothly. What I delivered: • Real-time availability and booking flow • Stripe payments and secure checkout • Sync with Booking.com (http://Booking.com) to avoid double bookings • Admin dashboard for pricing, dates, and guests • Mobile-friendly guest UI Impact: • Cut manual booking work by ~60 percent • Removed double-booking issues • Improved guest experience and conversion Tech: Next.js, TypeScript, Supabase, Stripe, Vercel What this project shows: End-to-end product build, payments, scheduling logic, and real customer deployment.
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Cover image for System Design Sandbox: Simulate Architectures for FAANG Prep...
System Design Sandbox: Simulate Architectures for FAANG Prep Built this interactive tool to make system design interviews hands-on. Pick scenarios like URL Shortener (5k RPS, 100ms P95), drag 9 components (CDN, Redis, Kafka), connect flows on an infinite canvas, and run simulations for instant latency/capacity feedback. No code needed. Key features: Real-time bottleneck detection, shareable designs via URL, mobile-friendly. Tech: React/Next.js frontend, Node.js backend, Vercel deploy, WebSockets for live sims. Impact: Beta users cut prep time 40%. One tester aced a senior engineer interview. Live demo: systemdesignsandbox.com (https://www.systemdesignsandbox.com/) Need a custom sim tool for your team? DM me.
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PostgreSQL(2)
Arshad Kazi's avatar
Arshad Kazi
Oakville, Canada
Founder and Lead Developer at ShiftLogic
New to Contra
Founder and Lead Developer at ShiftLogic
Cover image for Smart Family Grocery List —
Smart Family Grocery List — Full-Stack Mobile App Personal project Privacy-first grocery list app with a FastAPI Python backend and Kotlin Android frontend. Features grocery price scraping and comparison across local Ontario stores, OpenStreetMap-based store locator, AES-GCM encrypted personal data, Siri Shortcut integration, and smart list optimization. Demonstrates full-stack development from mobile frontend to API to database. Technologies: FastAPI, Python, Kotlin, AES-GCM encryption, OpenStreetMap API, PostgreSQL/SQLite, Docker
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Cover image for Hermes Agent — AI Agent
Hermes Agent — AI Agent Orchestration Framework Personal project Built an AI agent framework that manages task delegation, model routing, and automated workflows across multiple LLM providers. Features include: cron-based job scheduling, multi-agent parallel task execution, automated file system management, and session-aware context retrieval. The system processes daily briefings, job market monitoring, and infrastructure management. Technologies: Python, LLM APIs, async task queues, git-based sync, shell automation
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Cover image for Auto Loan Calculator — Interactive
Auto Loan Calculator — Interactive Web App Personal project Live at autoloancalculator.arshadkazi.ca (http://autoloancalculator.arshadkazi.ca). Built a full-featured auto loan calculator with dynamic amortization schedules, trade-in valuation, and promotional rate comparison (including Ontario-specific pricing rules). Demonstrates front-end React/TypeScript development and deployment. Technologies: React, TypeScript, Vite, CSS, Cloudflare Pages
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Cover image for MapleGamma — Daily AI Briefing
MapleGamma — Daily AI Briefing Pipeline Personal project Automated briefing pipeline at briefing.arshadkazi.ca (http://briefing.arshadkazi.ca) that ingests content from multiple sources, processes it through an LLM workflow, and delivers a curated summary on a daily schedule. Demonstrates end-to-end cron + LLM agent pipeline. Technologies: Python, LLM APIs, cron, RSS parsing, markdown rendering
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21
PostgreSQL(1)
Jin Park's avatar
Jin Park
Oakville, Canada
The Voice AI Guy - Livekit & Pipecat 🎙️🤖
The Voice AI Guy - Livekit & Pipecat 🎙️🤖
Cover image for Voice AI SaaS Architecture Design
Voice AI SaaS Architecture Design
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Cover image for Voice AI Saas for Dental Clinics (Livekit)
Voice AI Saas for Dental Clinics (Livekit)
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6
Cover image for Web Voice AI Designs (Livekit)
Web Voice AI Designs (Livekit)
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Cover image for Custom Voice AI Orchestration Engine (LiveKit)
Custom Voice AI Orchestration Engine (LiveKit)
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PostgreSQL(2)