PostgreSQL Jobs

I have a complete, clean PostgreSQL database of a football club's entire match history — 120 years, roughly 6,900 matches, with lineups, goals, cards, players, managers, referees and venues. **The data work is finished.** I need a developer to build the website on top of it. There is a full written specification and a technical appendix documenting every table and data convention. Both go to shortlisted bidders. This is a well-defined build, not a discovery project. ### What exists already - A PostgreSQL 17 dump (~10 MB, 35 tables) that restores cleanly, with a documented schema - A working read-only reference viewer you can browse: **** - A ~15-page specification covering every page, every form, colours, and an acceptance checklist - A technical appendix covering data conven...

I need an experienced developer to carry out several coordinated upgrades on my existing e-commerce system. 1. PHP Admin Panel The product-management area must let me update existing items more intuitively. That means revising the update logic, refactoring the related PHP views/controllers, and adjusting any database calls so new fields or validations are stored reliably. 2. Flutter Mobile App Parallel to the back-end work, the customer-facing Flutter app needs UI tweaks that mirror the revised product data structure and keep the overall look consistent with our latest branding guidelines. 3. POS Integration Our in-store POS has to feed sales, stock moves, and pricing changes straight into the admin panel. A clean, real-time sync (REST or webhook—whichever fits best...

I'm looking for an experienced developer to create a web application aimed at improving English fluency through interactive speaking exercises. The app should include: - Interactive speaking exercises as the primary function - Voice recognition and feedback - Progress tracking and reports - Game-like activities and challenges Ideal skills and experience: - Strong background in web app development - Experience with voice recognition technology - Ability to implement engaging, game-like features - Familiarity with progress tracking systems and user-friendly report generation Please include any relevant work samples in your bids.

I run a busy plumbing-supply shop and need a small web portal that makes every new purchase entry worth more than a line on paper. Here is the flow I have in mind: the counter staff open the site, record the item name and quantity, note the supplier and the exact purchase cost, then hit “Save.” As soon as that happens two things must occur automatically: 1. The system stores the entry so I can search, filter or export it later. 2. A WhatsApp Business message is fired off to a pre-defined contact list—filtered by the product category we’ve tagged—letting customers or team members know fresh stock has arrived. Only the “new purchase entry” event should trigger these notifications; low-stock or scheduled reports are not required right now. I ...

Machine Learning Pipeline – Job Market Analytics & Salary Prediction Created an end-to-end machine learning pipeline for looking at job market data and guessing what salaries might be. Key Features: Worked on. Fixed 10,000 or more job-market records using Python, Pandas and NumPy. Made an automated ETL/data preprocessing pipeline to take care of data cleaning, changing data making it all the same and checking if it is all the same. Added a PostgreSQL (Neon) database to keep data in a good way and help with machine learning work. Did analysis of the data. Looked at the features to find what helps predict salary. Trained a Random Forest regression model to guess salaries. Found that employee_residence is one of the things to use for guessing salaries. Built a Fas...

This project involves building an end-to-end QR Code Parking Tag system that works seamlessly as both a responsive web application and a Telegram bot. The single most important capability right now is reliable QR-code scanning so attendants can quickly validate a vehicle’s tag from any mobile device or desktop webcam. Key expectations • One shared backend should power both the web front end and the Telegram bot, so data stays in sync. • The web app needs a clean dashboard where administrators can create and manage parking tags, monitor scans in real time, and export simple usage logs. • The Telegram bot must mirror the same scan-and-validate flow, returning an immediate success/denied message inside the chat. • Code quality and clear documentation are cru...

Title: AI-Powered Price-Discovery Web & Multi-Module Mobile App Deployment (Indian Agency Only) Project Description: We are launching , an innovative AI-powered price-discovery and consumer utility ecosystem based in Delhi. We are seeking a registered Indian Software Development Company with an established, verified in-house team to deliver our Phase 1 infrastructure: a responsive Web portal, an Android App, and an iOS App. The core system architecture and functional flow of this project are modeled after established Indian shopping utility and AI-driven comparison engines, specifically superdost () Smartprix, (Kompare AI), and Buyhatke. The selected development company must analyze these benchmark applications to understand our required structural baseline. Core Project Scope Ele...

Full-Stack Web Booking Platform & Desktop Client Extension (Node.js/React/Electron) Description: We are seeking an experienced Full-Stack Developer or small Development Team to build a multi-stage scheduling and session utility platform. The project starts with a custom web booking system (Phase 1) and will expand into a native desktop application (Phase 2). Key Technical Requirements: Backend: Node.js, NestJS, PostgreSQL Frontend: React.js / , TypeScript, Tailwind CSS Desktop Client: Electron (TypeScript) or C# .NET Integrations: Google Calendar/Meet API (OAuth2), Transactional Email, AWS S3, WhatsApp Business API Scope Summary: Phase 1 (Web Platform): Rolling-window availability booking calendar, multi-timezone management, automated Google Meet link generation per host, custom adm...

I need a Flutter mobile app with a backend. The backend should support API integrations. Ideal skills and experience: - Proficiency in Flutter and - Experience with API integrations, particularly with payment gateways and third-party services

Overview: We are seeking an experienced full-stack developer or agency to build an AI-powered OCR Challan Processing & Automated Billing System. The solution will automatically read uploaded challan images/PDFs, extract relevant data, group them shop-wise, and trigger automatic PDF invoice generation once a shop reaches 200 processed challans. Key Features & Modules: Authentication: Secure user login with JWT and password protection. OCR & AI Extraction: Extract Shop Name, Challan Number, Product Details, Quantity, and Date using Google Vision API (or equivalent). Includes AI validation and duplicate detection. Shop-wise Segregation & Counter: Separate challans by customer/shop and automatically track count (e.g., 198 → 199 → 200). Automated Invoicing: Auto-g...

I run several production workloads in AWS here in Singapore and need a partner who can jump in any time—day or night—without the lag a distant time zone creates. Fast, reliable WhatsApp communication is non-negotiable; that is how my team escalates issues and approves changes. Core stack you will care for: • EC2 instances that host our main applications • S3 storage buckets for static assets and backups • RDS databases (primarily MySQL / PostgreSQL) We also lean on Elastic Load Balancing, IAM, and Shield/WAF, so familiarity with those services is important. Beyond break-fix help, I’m looking for proactive value: • Consultation on architecture and cost-/performance best practices • Regular system-health monitoring with early-war...

Build & Deliver RTIQA v1 — Global Multi-Tenant EdTech Platform RTIQA is a large, long-term project aimed at building an impactful global EdTech SaaS platform combining: - School Management System (SIS) - Learning Management System (LMS) - Student Information Management - Parent Engagement - Secure Assessments and Academic Records - Certificates and Verification with Public Verification Pages - Notifications and Communication - Practical AI-Powered Educational Assistance Tools This is a full engineering challenge focused on delivering ONE complete and production-ready outcome. The successful freelancer or team will review the existing repositories, analyze the architecture, consolidate or refactor as necessary, and take RTIQA from its current work-in-progress state to a secure, ...

Statement of Work (SOW): Parking Agent MVP Development ## 1. Project Overview & Objective Parking Agent is an app-less, privacy-first QR vehicle communication platform. The objective of this project is to build an Minimum Viable Product (MVP) consisting of a pre-generated QR inventory system, a secure mobile web interface for vehicle owners and scanners, automated OTP/notification routing, and a basic administrative management panel. --- ## 2. Technical Stack & Requirements (Recommended) * **Backend Framework:** Node.js (Express/NestJS) OR Python (FastAPI/Django) * **Database:** PostgreSQL (Relational database for structured QR mapping and vehicle relationships) * **Caching/Session:** Redis (For OTP storage, rate-limiting, and short-term link verification) * **Frontend:** React....

## Custom Suit Designer & E-Commerce Website Development I am looking for an experienced **full-stack web developer** to develop a modern custom clothing e-commerce website with an interactive **custom suit personalization system**, similar in concept to the customization experience offered by Hockerty. ### Project Overview The website should allow customers to design and customize their own suits online through an intuitive, step-by-step interface. Customers should be able to select different suit styles, fabrics, colors, patterns, fits, and other customization options and see their selections reflected visually. ### Key Features **1. Interactive Suit Customizer** * Suit/jacket style selection * Fabric selection * Fabric colors and patterns * Lapel style * Buttons and but...

Project Overview: We are looking for an elite Full-Stack / Mobile Developer to build AFRIMATI-COMMERCE, an innovative B2B transactional marketplace connecting agricultural producers and livestock farmers directly with bulk buyers, processors, and exporters. Our mission is to build a seamless human and economic synergy (osmose) that cuts out destructive middlemen and empowers rural producers. The Deliverable: • 2 Native Mobile Applications (Android & iOS) built with a unified framework (React Native or Flutter). • A robust backend API powered by NestJS (Node.js) with a PostgreSQL database. Key Functional Scope: • Wholesale B2B Only: Designed strictly for bulk quantities (metric tons, 100kg bags, livestock herds). No retail. • Secure Escrow System: Critical integrat...

I need a clean, well-structured Django application that works as a dedicated content management system for product listings. The core of the job is to let me create, edit, and retire products easily from an admin dashboard while the public site instantly reflects every change. Key capabilities I must have • Inventory management – automatic stock tracking, low-stock alerts, and a simple bulk-update screen. • Product categorization – nested categories, drag-and-drop reordering, and URL slugs that honor the hierarchy. • Advanced search – fast, faceted search across titles, descriptions, tags, and category names (Elasticsearch or PostgreSQL full-text search is fine). I’m already comfortable deploying on a typical Linux/Nginx/PostgreSQL stack, so t...

Our eKYC platform is live, but the two-factor authentication built into the public weblink is failing consistently. Users receive the OTP/SMS push, enter the code, and the process stalls with a generic “authentication error” before redirecting them back to the login page. Server logs show no obvious stack trace, so I need someone to dig in, reproduce the fault, and patch it without disrupting the rest of the flow. What I know so far • Front-end: React single-page component that posts to a Node/Express API • Auth layer: JWT for the first factor, OTP via Twilio for the second • Database: PostgreSQL 14 • Error appears only in production, not in our staging environment Your job 1. Trace the call from the React form through the Express middleware to p...

I have several structured Excel sheets that hold our current service records. I need every row from those files accurately entered into our live service database, preserving all field relationships and ensuring there are no duplicates. You may work directly in the database interface or prepare a clean CSV/SQL file for me to review before we import—whichever is faster for you while still keeping the data intact. The key for me is accuracy and consistency: each service line in the spreadsheet must map to the correct table and column, and any reference keys need to stay usable once the data is inside the system. After you finish, please run a quick spot-check with me so we can confirm totals and sample entries match what’s in the spreadsheet. Let me know: • the database pla...

Customize Your Existing AI/Web Pipeline for Autonomous Vendure Debugging Hello, We are looking for an engineer with Vendure or a closely related Node.js/TypeScript e-commerce background to adapt the AI programming, website-debugging, testing, or automation pipeline you already use into a fully automated debugging, testing, and delivery-verification pipeline for a Vendure storefront. You do not need to invent a new framework from scratch: if you have a pipeline you already use for your own projects, you may fine-tune it, assemble it with other components, or replace our suggested components. We already have a working pipeline prototype and a basic engineering foundation. The current design uses CAO as the coordination and supervision layer, OpenHands or CrewAI as bounded code-execution a...

We're looking to shortlist an experienced full-stack developer to help us finish and refine an existing peer-to-peer equipment rental marketplace. The platform is already well developed, so this isn't a build from scratch. The remaining work is mainly finalising functionality, fixing smaller issues, cleaning up technical debt and polishing the overall user experience before launch. There's no immediate start or rush. Right now, we're looking to find a few strong candidates who we can speak with properly when the time is right. Tech Stack Ionic React NestJS PostgreSQL Strong experience with this stack is important, as you'll be working within an existing codebase. What Still Needs Doing We've organised the remaining work with screenshots and clear dot-poi...

Project Title: E-Commerce Web Application – Fadi's Bites Overview: I have designed and developed the frontend for Fadi's Bites, a modern e-commerce web application built for a ready-to-cook snack brand. I am looking for a developer to help integrate full backend functionality, authentication, and payment processing. Current Stack & Features Implemented: Framework: (App Router) & TypeScript Styling: Tailwind CSS + custom UI components Pages Built: Hero landing page, dynamic product menu, category filters, customer reviews section, and blog layout. Tasks Needed: Database & API: Set up Prisma ORM with PostgreSQL/MongoDB to handle dynamic product inventories and order management. Cart & Checkout: Integrate a persistent cart system and Stripe payment ga...

I’m ready to move from sketches to a working, production-ready Grocery Management application that runs smoothly on Android devices and in any modern web browser. Here is the core scope: • Users must be able to register, sign in and manage their own data, so please include a secure account system with email/password (social login is a plus but optional). • The heart of the product is a dynamic shopping-list creator. Items can be added manually or through real-time barcode scanning—on Android via the camera and on web via webcam or manual barcode entry. • After items are saved, the app should suggest recipes that intelligently use what’s already on hand; a simple rule-based engine is fine to start, as long as the data model keeps the door open for f...

CANONICAL DATA MODEL Hello, What caught my attention in your project is that the real problem is not simply completing missing features. You already have a product. The challenge is that several parts of that product are beginning to behave as independent systems when they should be operating from the same source of truth. SipVault, the Document Hub, and Form Configuration should not merely exchange data. They should share a coherent domain model. That is where I would begin. Before changing production behavior, I would inspect the current React / TypeScript / Node.js / PostgreSQL implementation, map the existing entities and relationships, identify duplicated or conflicting models, and define the canonical structure that the rest of the application should depend on. From there, the...

Freelance Developer Needed to Finish Existing Marketplace App — Velza I’m looking for an experienced developer to help finish and prepare an existing web app called Velza for launch. Velza is an Australian marketplace connecting customers with tradies and service providers. The core app, design direction and business model have already been developed. I am not looking for someone to start again from scratch — I need someone who can review the existing codebase, understand how the platform works, finish the remaining functionality, fix any issues, test everything properly and get it production-ready. The app currently uses a modern React/TypeScript-based stack with Supabase/database integration and is being prepared for production deployment. The main areas that need t...

Full-Stack Property Management, CRM, Marketplace & Field Operations Platform We are looking for an experienced senior full-stack developer or small product engineering team to build a complete, production-grade property management operating system for an Indian real-estate/property-management company. This is not a simple website or admin panel. The requirement is for an integrated SaaS-style platform combining a public property marketplace, CRM, property-management operations, customer portals, field operations, finance workflows and employee/HR functions within a single system. Core Product Scope The system should have four interconnected application surfaces sharing one central backend: 1. Public Website + Property Marketplace SEO-optimized responsive website, city/locality lan...

I’m building an online directory similar to and need an automated pipeline that gathers data from roughly 6–10 external sites. The directory must hold three kinds of records at launch—restaurant menus, product prices, and service listings—and refresh the full data set on a weekly schedule. Here’s the flow I have in mind: scraper scripts (Python with Scrapy, BeautifulSoup, or a comparable framework) pull structured information from each source, normalise it, and load it into a database that powers the public-facing site. A cron job or cloud function should trigger the weekly update, logging what changed so I can spot anomalies quickly. Duplicate detection, polite rate-limiting, and respect for are essential. Deliverables • Clean, well-commented scrapin...

## Professional Website Development – Modern & User-Friendly I am looking for an experienced web developer to build a modern website inspired by the reference website below: **Reference Website:** The new website should have **similar core functionality and features**, but the design and layout should be **completely different, modern, professional, attractive, and user-friendly**. I am looking for someone who can understand the reference website and also suggest improvements to create a better overall **UI/UX and user experience**. ### Please provide: * Estimated project timeline * Total project budget * Recommended technology/tech stack * What information or resources you need from me * Examples of similar websites you have developed The website should be **fully respon...

Intelligent Financial Fraud Detection System Python, SQL, XGBoost, Isolation Forest, SHAP, FastAPI, PostgreSQL, Streamlit, Docker, AWS Developed an end-to-end fraud detection pipeline processing financial transaction data using Python, SQL, and PostgreSQL, including data cleaning, exploratory analysis, feature engineering, and class-imbalance handling. Trained and compared Logistic Regression, Random Forest, XGBoost, and Isolation Forest models for supervised fraud classification and unsupervised anomaly detection. Engineered behavioral and transaction-velocity features including transaction frequency, amount deviation, new-device activity, unusual location, and time-based spending patterns. Implemented SHAP-based explainability to identify transaction-level factors contributing to fraud ...

I have an existing multi-tenant SaaS platform called SipScale, built and iterated quickly using Replit and AI-assisted development. The platform is functional and fairly extensive, but before continuing feature development I need a senior full-stack SaaS developer/software architect to perform a complete technical audit of the existing application and address the most critical issues discovered within the project budget. This is NOT a greenfield build. I am not looking for a redesign or a complete rebuild. Budget Fixed price: $1,500 Milestone 1 — $1,000: Full Technical Audit Milestone 2 — $500: Critical Stabilization I understand $1,500 may not cover every fix. The priority is to thoroughly understand and document the system first, then use the remaining budg...

# Senior Solana Full-Stack Developer Needed — AI Whale Intelligence + Trading Platform ## PROJECT I am looking for an experienced **Solana blockchain developer / full-stack engineer or small team** to build a Solana-only crypto intelligence and trading platform. **Working name: Daddy Fomo AI** The vision is to combine **Solana on-chain intelligence + whale tracking + AI analysis + wallet network visualization + real-time signals + trading + copy trading** into one premium platform. This is not intended to be a basic blockchain explorer. The goal is to make complex Solana activity easy to understand, visualize and act upon. ## 1. WALLET & WHALE INTELLIGENCE Users should be able to search and monitor Solana wallets. Wallet profiles: * SOL/token balances * Portfolio value *...

We are looking for an experienced Full-Stack Mobile App Developer to build a small, lightweight, production-ready mobile application with a simple 3-section structure: Home - Main dashboard, balance/status, timed activity/session, progress and statistics Rewards - Ads, referrals, bonuses, withdrawal and FAQ Account - Profile, account information, history, settings and support Required Programming Skills Mobile: Flutter / React Native / Android (Kotlin) Frontend: UI development, API integration, state management, timers/background processes Backend: Node.js / similar, REST APIs, authentication, business logic Database: PostgreSQL / MySQL / Firebase / Supabase Integrations: Ad SDKs, notifications, analytics and payment/withdrawal APIs Security: Authentication, API security, server-side val...

Necesito desarrollar una API robusta en .NET 9 o superior que automatice por completo la emisión de documentos tributarios electrónicos (DTE) para el Servicio de Impuestos Internos (SII) de Chile. Alcance funcional • Generación XML de cada DTE. • Firma electrónica avanzada (FEA) incorporando certificado digital. • Envío masivo o individual al SII y recepción del acuse. • Consulta de estado y almacenamiento de track id. • Registro de respuestas del SII para auditoría interna. • Endpoints protegidos con autenticación JWT. Tipos de DTE que debo cubrir • Facturas • Notas de crédito • Notas de débito • Boletas Requisitos técnicos * .NET 9+, C#, ...

DESARROLLADOR FULL STACK – INTEGRACIÓN STRIPE Y SISTEMA DE TRAZABILIDAD DE COMPRAS Buscamos un desarrollador Full Stack para desarrollar un sistema de trazabilidad y confirmación de compras para un servicio de sesiones privadas online. Objetivo Desarrollar un flujo automatizado que permita registrar y conservar evidencia asociada a cada compra realizada mediante Stripe, incluyendo: Confirmación de intención de compra. Aceptación de términos y condiciones. Confirmación de asistencia. Confirmación posterior de realización de la sesión. Registro de IP y timestamps. Vinculación de toda la información con la operación correspondiente de Stripe. Flujo requerido 1. Pago El cliente realiza el pago...