PostgreSQL Jobs

I HAVE A WEB APPLICATION MADE IN REACT JS , NODE JS AND POSTGREY SQL . I WANT IT THOUROUGHLY TESTED BY AN EXPERT .

I need a full-stack Python application that unifies three business-critical modules—HRMS, core CRM, and Accounting—inside a single web-based suite. Each module must be able to invoke Langchain workflows so that users can chat with their data, generate documents, and run natural-language queries without leaving the screen. Scope of work • HRMS: employee records management, automated payroll processing, and leave tracking, all secured by role-based permissions. • CRM: contact and deal pipelines plus an AI assistant that can summarise interactions or draft follow-up emails. • Accounting: double-entry ledger, invoicing, and expense tracking, with chatbot-driven report generation. Technical expectations – Python 3.11+ on the back end, preferably FastAP...

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Platform Architecture Requirement The system must be enterprise-grade, scalable, and secure. Preferred Tech Stack (Must Have) Mobile App: Flutter (Preferred) / React Native Single codebase for Android & iOS Backend: Node.js (NestJS / Express) Microservices-ready architecture Database (Large Data Handling): PostgreSQL / MySQL (Primary – structured data) MongoDB (User activity, logs, flexible schemas) Redis (Caching, sessions, high-speed reads) Cloud & Infra: AWS / GCP / Azure Auto-scaling enabled Load balancer + CDN Object storage (AWS S3 equivalent) Admin & Franchise Panels: Web-based dashboard (React / Angular) Role-based access control Key Functional Requirements Franchise Model Support Central Admin (Super Control) Franchise Admin (City / Zone wise) Franchise-wise or...

We are looking for an individual Python Developer (No Agencies) to build a WhatsApp-based Service Marketplace ("Super Agent"). We have the full logic and flow ready. We need someone to execute the code efficiently using Free-tier technologies to keep costs low. ​Budget: Competitive/Low (Ideal for freelancers looking for a long-term portfolio project). Timeline: 2 - 3 Weeks. ​Technical Stack (Mandatory): ​Backend: Python (FastAPI or Flask). ​Database: Supabase (PostgreSQL) – Must use PostGIS for location calculations. ​Platform: WhatsApp Cloud API (Direct Meta integration). ​AI: OpenAI API (for intent recognition). ​Key Features to Build: ​1. Dual User System (Role-Based) The bot must recognize two types of users on the same number: ​Customer: Sees the menu (Book Driver, Re...

I need a complete website built around display advertising for products. The core idea is simple: advertisers create visually engaging product ads and customers browse, click, and interact with them. To make that work I’ll need two distinct account types—one for advertisers to upload, schedule, and track their campaigns, and another for customers so they can manage preferences, save favorite ads, and receive a more personalized experience. I’m open on the tech stack as long as the final site is fast, mobile-responsive, and easy for me to maintain without touching code every day. A clean dashboard for me (as the admin) is essential so I can approve or reject ads, set pricing rules, and pull basic analytics. Key deliverables: • Fully functional website front-end and ...

I am looking for an experienced backend developer to build a Service Booking Automation System on WhatsApp. The project involves connecting users with service providers using AI parsing and automated workflows. We are not building a mobile app. This is a pure WhatsApp Automation project using official APIs. Core Technical Requirements: WhatsApp Business API Integration: Experience with BSPs (like Interakt, Wati, or Twilio). AI Integration: Connect OpenAI (GPT-4) to parse unstructured user messages (e.g., extracting date, location, and intent from chat). Database Management: Proficiency in Supabase (PostgreSQL) to store user data and active requests. Geolocation Logic: Ability to filter database entries based on "Location Pins" (Lat/Long) shared on WhatsApp. Broadcast & Timer ...

I need a single web-based dashboard that lets commercial facility managers see, at a glance, how each of their solar PV systems is performing. The interface must pull live data through the public or partner APIs of SolisCloud, Fusion Solar, Growatt, Solar Analytics, iSolarCloud and Wattwatchers, then store that data in a database I can host myself—PostgreSQL or another non-proprietary option preferred so I can avoid ongoing subscription fees. For the first release I only require on-screen visualisation (no PDF or emailed reports). The screen should surface the core indicators we usually follow—energy production, energy consumption and overall system efficiency—while leaving room for us to add or hide additional metrics later. Charts, comparative widgets and clear status ...

Project Overview – Barbershop Booking & Management App This project is inspired by Booksy (customer app) and Booksy Biz (business app), but the goal is to combine both into a single application with role-based access instead of two separate apps. The platform serves three user roles: • Customer • Barber / Staff • Owner Each role sees different features and dashboards inside the same app. I already have an APK build available that shows: • The current UI/UX direction • Existing screens and flows • Features that are already partially implemented The APK and screenshots are provided as a reference to speed up development, not to redesign everything from scratch. The expectation is to continue, improve, and complete what’s already starte...

The developer will be responsible to fully migrate and install the necessary files in order for the site to properly function and load the template with no errors. Developer must successfully upload 2 test products postings and include test SEO for those postings. All necessary plugins, and demo databases must be tested and deployed. Site must also be optimized.

I’m setting up a fresh backend that will house our analytics data, and I want it built around MySQL. The work starts with solid database architecture—clean schema design, indexing strategies, partitioning where it makes sense, and clearly documented relationships so future queries remain fast even as volume grows. Once the structure is in place, I need automated pipelines to move data from our various sources into this new store. Think full-stack ETL: extract from APIs or flat files, transform for consistency and quality, then load into the MySQL tables on a defined schedule. I’m open to tools you’re comfortable with—Python scripts, Airflow, Fivetran, or a light-weight custom solution—as long as the result is reliable, monitorable, and easy to extend....

JOB OPPORTUNITY WhatsApp Appointment & Communication System Developer We are seeking a skilled software developer or development team to build a WhatsApp-based Appointment & Communication System for a hospital. The system must allow patients who click Facebook ads OR scan a QR code to be redirected instantly to WhatsApp and book appointments easily—without calling or visiting the hospital. Project Overview The goal is to digitize hospital appointments using WhatsApp, the most widely used communication platform among patients in Somalia. What the System Will Do • Automatically book hospital appointments via WhatsApp • Send confirmation and reminder messages • Answer frequently asked questions (FAQs) • Work on basic smartphones and web Patient Entry Points ...

I keep hitting a connection-timeout message whenever I try to reach my PostgreSQL database from the terminal with psql. The database is part of a Dockerised backend; the application layer spins up fine, yet a direct CLI connection fails as though the server does not exist. I have not even confirmed whether the PostgreSQL container is actually running because I am unsure of the correct Docker commands to use or the places to look for port-mapping issues. What I need is straightforward: trace the reason the terminal session can’t find the server, bring the database online (or exposed) if it is down or mis-configured, and leave me with the exact commands or config edits required so I can repeat the process on other environments. Deliverables • Working psql connection from my lo...

**Tech Stack:** 16, Supabase (PostgreSQL), Twilio SMS, Resend Email, Stripe **Priority:** Fix courier SMS notifications --- ## BUG #1 - CRITICAL: Courier Not Receiving SMS **Problem:** When customers confirm delivery time on tracking page, couriers don't receive SMS notification. **Location:** `app/track/[orderId]/`, function `confirmTimeSlot` (line ~200-250) **Details:** - Table: `courier_applications` (stores courier data) - Orders table: `delivery_requests` - Query: `.from("courier_applications").eq("id", order.assigned_courier_id)` - SMS sent via: `/api/send-notification` **Need to verify:** - Database schema (`courier_applications` columns: id, phone, email, full_name, status) - Relationship between `delivery_requests.assigned_courier_id` and `` - Co...

Project Brief Project: Multi-Tenant Hyperlocal Logistics Platform Overview We are planning to build an enterprise-grade, multi-tenant logistics platform that enables multiple brands to manage hyperlocal deliveries through a single, scalable system. The platform will support own fleets (1PL) as well as third-party logistics partners (3PL), offering end-to-end capabilities from order creation to delivery completion and financial settlement. Objective To create a technology-first logistics operating system that simplifies delivery operations, improves rider productivity, reduces fraud risks (especially in COD), and provides real-time visibility and analytics for all stakeholders. Key Capabilities Centralized order management with priority-based allocation Fleet and rider management wi...

I’m looking for a full-time front-end engineer based in Gujarat who can own everything we do in React.js and Next.js. You’ll be the point person for new feature work, performance tuning, and day-to-day maintenance of our customer-facing web app. Our backend stack runs on Django with Supabase and Postgres, so you’ll spend most of your time in React/Next but also collaborate closely with the Python team and consume their REST and GraphQL endpoints. Key points • Location: must already be in Gujarat (we meet once a month in Ahmedabad) • Experience: 3+ years building production React applications • Schedule: full-time, 8 hrs a day, Monday–Friday, long-term Your routine will involve: – Shipping well-tested React and Next components &nda...

I’m building a ticket-based travel platform and need an experienced NestJS/Node.js developer to own the entire backend. The core of the job is to design and code a robust booking engine, connect it to external services, and expose clean, well-documented REST/GraphQL endpoints for the web and mobile apps that will sit on top. What has to plug in • Payment gateways, travel service providers, and user authentication services all need first-class, fault-tolerant integrations. I already have partner documentation for each service; your job is to wire them up, handle retries/timeouts, and log everything clearly. Booking workflow The platform must perform Real-time availability check before every purchase, send Booking confirmation notifications (email + optional SMS), and support fu...

(This is not a real Project, If hired you will be training an individual in completing the following tasks, You will be paid to train) I’m extending an existing C#/.NET solution that drives sensor-based PCBs on the lab bench and streams the resulting measurements into a PostgreSQL back-end. What I need now is a specialist who can tighten the link between the physical devices and a truly high-volume data pipeline. The hardware side The application already communicates with multiple sensor-laden PCBs over standard interfaces (USB-TTL and TCP sockets). Your task is to refine those drivers so they stay rock-solid during long endurance tests—handling hot-plug events, reconnection logic and precise timing so no sample is lost. The data side We routinely push hundreds of thousan...

Project Overview We are building a Talent CRM platform designed for casting teams, creative studios, production companies, and agencies. The software centralizes talent profiles, submissions, communications, and project pipelines into one streamlined system. This platform will function as a modern, scalable alternative to spreadsheets, email chains, and outdated casting tools. We are looking for an experienced developer (or small team) to help architect and build core modules of the platform. --- Responsibilities: You will be responsible for developing key components of the Talent CRM, including: 1. Talent Database & Profile System - Create structured talent profiles (media uploads, skills, credits, tags) - Implement advanced search & filtering - Build activity logs (auditions...

Our team is midway through building a Electronic Health Record (EHR) platform and the PostgreSQL layer now needs an expert touch. The schema has grown organically; I need someone with 5+ years of solid PostgreSQL experience who can step in, refine the data model, and leave us with a fast, future-proof database. Your first task will be to review the existing ERD and propose improvements that align with our integration workflows. From there, you’ll redesign tables, constraints, and indexes where necessary, write or refactor the complex SQL that feeds our pipelines, and tune the engine so queries fly. Back-ups and routine maintenance scripts also need tightening to guarantee reliability once we go live. I’m working on a fixed, project-based arrangement and expect clear milestone...

I have a production-ready enterprise application built with Python/FastAPI that requires final testing and deployment to a dedicated Linux server. The codebase is approximately 95% complete with 140+ Python files, 40+ database tables, and full Docker containerization. What You'll Do: - Review and test the existing codebase on my local machine - Ensure all tests pass (green across the board) - Deploy to a Hetzner dedicated server with GPU support - Configure all production services (PostgreSQL, Redis, Nginx, SSL) - Verify system is 100% operational and live Tech Stack: - Python 3.11+ / FastAPI - PostgreSQL / Redis - Docker / Docker Compose - Nginx with SSL/TLS - Linux (Ubuntu) Timeline: 4 weeks Budget:** $2,000 USD (paid upon 100% verified completion) **Important Requirements:** ...

Project Title Frontend + Backend Development for Digital Gold Savings & Rewards Fintech App (Solene Gold) ________________________________________ Project Description We are building Solene Gold, a mobile-first fintech platform that enables users to save and invest daily in digital gold, earn rewards and vouchers, and redeem gold for jewellery (including lab-grown diamonds via our in-house brand). The product combines features from Jar & Gullak with advanced rewards, gamification, referrals, and jewellery commerce, and is designed to scale to millions of users. We are looking for experienced frontend and backend developers (or a strong full-stack team) to build the MVP and scalable architecture. This is a serious fintech build, not a demo app. ______________________________________...

I have three separate ideas that I want to turn into fully-functioning Odoo 19 solutions. Each project will be delivered as its own installable module, deployed on a fresh Odoo 19 instance that I will provide. My two guiding objectives are simple: automate as many day-to-day processes as possible and give end-users a noticeably smoother, cleaner experience. Here is the flow I have in mind: • We refine requirements for Project 1, move it through development, testing and production, then repeat for Projects 2 and 3. • You handle Python back-end work, PostgreSQL, XML/QWeb views and any JavaScript needed for front-end polish. • Clear, commented code, functional test cases and a short hand-over document come with every deliverable. I will be available for quick feedback...

## Job Description We are looking for an experienced **Full Stack Developer** to **manage, maintain, and enhance our existing CRM built in Laravel**, while also **designing and developing a new, modern version of the CRM using Node.js**. This is a long-term role for someone who enjoys working on **real-world production systems**, understands **business workflows**, and can help modernize a mature product without breaking existing functionality. --- ## Responsibilities * Maintain, debug, and enhance the **existing Laravel-based CRM** * Understand current business logic, workflows, and database structure * Design and develop **CRM Version 3.0** using **Node.js** (modern architecture) * Migrate features gradually from Laravel to Node.js * Develop and integrate REST APIs for frontend an...

Objective: 1) Migrate an existing ISO form-filling template + algorithm currently built in Base44 onto our live platform and 2) Implement PDF generation/print export for 5 compliance report types. Tech Stack: Base44 (source), Supabase, Vercel, Cloudflare, GitHub. Workstream 1: ISO Template Migration Migrate ISO form-filling template and algorithm from Base44 to production Ensure complete feature parity and functionality Maintain data integrity and validation rules Optimize for production performance Workstream 2: PDF Compliance Reports Develop PDF generation for 5 types of compliance reports Professional formatting with dynamic content Include download and email delivery functionality Optimize for performance and file size Deliverables 1) Migrated ISO form-filling template (fully funct...

I have a PostgreSQL 11 (or newer) instance running as a Windows service, and I’d like to switch its user authentication from the default method to our already-operational LDAP directory. The LDAP server is up and reachable on the network; I simply need the database side wired correctly so that log-ins are validated against LDAP instead of local roles. The work involves: • Editing and any relevant parameters in to enable LDAP authentication and reloading the service without downtime. • Verifying connectivity, binding credentials and search patterns. • Walking me through a quick test with psql or pgAdmin to confirm that an LDAP user can connect and a non-LDAP user is rejected. • Supplying a short note (markdown or text) summarising the final configuration s...

I want to launch an Android-first replica of that fuses real-cash gaming with a built-in shopping credits system. Players top up a wallet, enter skill- or chance-based games, and—if they don’t win—every rupee automatically converts to shopping credits that can be spent in the app’s store. Instant withdrawal of winnings is equally important, so the wallet flow must handle both directions seamlessly. Core scope • Android MVP ready for Google Play within 4–8 weeks, polished enough to earn early user reviews and retention metrics. • iOS codebase planned next, so whatever stack you choose should keep cross-platform portability in mind. • Mandatory phone-number + OTP authentication out of the box. Key modules 1. Wallet: add funds, show balance,...

We need a fully functional HRMS (Human Resource Management System). The freelancer must already have a ready-made HRMS application with full source code. This project does NOT involve building HRMS from scratch. Requirements: Freelancer must already have a working HRMS source code/application. Install and configure the HRMS on our company server. Ensure the system is fully operational and tested. The system should include standard HRMS features such as role-based access, attendance & payroll management, admin dashboards, and secure authentication. Scope of Work: Provide a complete HRMS application with source code. Include standard HRMS modules: Employee Management Attendance & Leave Management Payroll Management Recruitment & Onboarding Reports & Analytics Performance Mana...

I need a Python-powered web application that lets retail traders screen live market data, choose a trading condition from the built-in library, and send orders instantly to three brokerage partners—Broker A, Broker B and Broker C—through their official REST/WebSocket APIs. The interface must feel interactive and feature-rich rather than bare-bones; think live, auto-refreshing tables, dynamic charts and a responsive layout that works on desktop first but scales to tablets. Core workflow 1. Real-time market feed arrives, is processed and filtered by my screening rules (I will provide the initial rule set in JSON). 2. When a rule is triggered the user should be able to preview and edit the trade ticket (quantity, price, stop etc.). 3. On confirmation the app sends the appro...

I’m building a cryptocurrency trading platform and need a developer who can own the portfolio-management side of the product. The core of your work will be a module that lets users see every position across connected exchanges in real time, then runs meaningful risk assessment on top of that data. Here’s what I have in mind: once a user links an API key, the system should pull balances and trade history, store everything in PostgreSQL, and continuously calculate exposure metrics—value at risk, asset and sector concentration, drawdown, even a quick stress-test against historic crashes. When a threshold is breached, users receive an alert straight inside the React dashboard (and optionally by email or push). The order-execution engine is already under development; you&rsq...

I already have the complete Laravel application archive waiting in a Git repo, but the VPS it should live on is still a blank slate. I need you to turn that empty server into a fully working production environment, install the script, and make sure the built-in admin panel (its default features are enough) is reachable at /admin. Work starts with the VPS itself: set up the web stack (PHP 8+, Composer, Nginx or Apache, MySQL/PostgreSQL—whichever you find optimal), secure the box, create a non-root deploy user, and harden SSH. Once the base is stable, clone or upload the project, run composer install, set up the .env, generate the key, migrate & seed the database, and wire up queue workers or schedulers if the app needs them. A free SSL certificate from Let’s Encrypt should ...

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Role Purpose We are building a high-integrity, AI-assisted intelligence platform that converts unstructured and semi-structured data into decision-support insights. The platform operates under explicit scope, governance, and safety constraints, prioritising correctness, explainability, and auditability. This role owns the entire SDLC and technical lifecycle: system architecture, data engineering, machine learning integration, infrastructure deployment, and quality assurance. Core Responsibilities – Platform & Architecture • Design and own a multi-store architecture (relational DB, object storage, search, vector systems) • Define and enforce clear source-of-truth boundaries Database Design & Data Engineering • Lead schema and data model design for entities, rel...

Project Title GIS Web Application Development (Python, Django, GeoDjango, PostGIS, Leaflet) Project Description We are looking for an experienced GIS Web Developer to build custom GIS tools/modules for a web-based application. The project involves backend GIS processing using Python and GeoDjango, along with an interactive frontend using Leaflet.js. The ideal freelancer should have strong hands-on experience with geospatial data processing, spatial databases, and web-based GIS visualization. Technology Stack Backend Python Django GeoDjango Django REST Framework Database PostgreSQL PostGIS GIS Libraries & Tools GDAL GEOS PROJ Frontend HTML CSS JavaScript Scope of Work The freelancer will be responsible for designing and developing GIS tools/modules that perform the following...

I’m migrating a production MySQL dataset (just under 50 GB) to PostgreSQL and want the move handled end-to-end with future growth in mind. Beyond a clean data transfer, I need the new cluster tuned for speed and modern feature use. Key requirements • JSONB support for semi-structured payloads • Native full-text search for rapid look-ups • Table partitioning and array-based storage so the schema scales gracefully I already apply query-level optimisations in MySQL; I’d like the same discipline carried over with tools such as EXPLAIN, pg_stat_statements and proper index design. Deliverables 1. Migration roadmap and rollback strategy 2. Schema translation scripts or pgloader/pg_dump commands ready to run 3. Feature implementation (JSONB columns, tsvector i...

Job Title: AWS Migration Specialist (Freelancer) Job Description We are looking for an experienced AWS Migration Freelancer to help us migrate our website data and application from a beta environment to AWS live production. All development work is already completed in the beta version, and the AWS infrastructure setup is in place. The scope of work is focused purely on migration, configuration verification, and go-live support. Scope of Work Migrate website data from beta environment to AWS live Verify and configure AWS services for production readiness Ensure smooth transition with zero or minimal downtime Validate database, APIs, backend services, and storage Perform post-migration testing and performance checks Fix any migration-related issues Provide basic documentation or h...

Hi, I’m looking for an experienced React Native developer for ongoing maintenance of a live Android app. The app is already live and feature-complete. The scope is maintenance only no new feature development. Tech Stack - React Native (hybrid app) - Node.js (TypeScript) - PostgreSQL - REST APIs - Sentry for crash & error monitoring - Android is currently the only active platform Main Responsibilities (Maintenance Only) - Bug fixes & crash fixes - Monitoring and resolving production issues - Play Store updates & compliance - Stability & performance-related issues - Small technical adjustments only when required to keep the app stable Important, Please Read Carefully - No new features - No rebuild - No redesign - No refactoring or architectural changes without prio...

Perfect. Below is a **custom-build–focused, developer-ready brief** with **latest technologies mentioned in depth**, suitable for a serious agency or senior full-stack team. You can copy-paste this directly. --- # Custom E-commerce Website Development Brief **Brand:** Indian Men’s Ethnic Wear **Build Type:** Fully Custom (No SaaS like Shopify) --- ## 1. Project Objective To design and develop a **high-performance, scalable, GST-compliant, custom e-commerce website** for an Indian men’s ethnic wear brand using **latest modern web technologies**, ensuring enterprise-grade security, fast performance, and future readiness for mobile apps, ERP, and omnichannel retail. --- ## 2. Core Requirements * Fully **custom-coded solution** * Modern, premium ethnic UI/UX * **Mob...

We're building an analytics SaaS platform and need help optimizing our data layer for speed and scalability. Tech Stack - 15 (App Router) on Vercel - Neon PostgreSQL + Timescale Cloud (7M+ rows) - Prisma ORM - MUI X DataGrid Premium What You'll Do - Optimize slow queries and add proper indexing - Implement caching strategies (Redis, edge, client-side) - Reduce Vercel cold starts and connection pooling issues - Improve large table load times and filtering performance - Document changes and best practices Requirements - Strong PostgreSQL performance tuning experience - Vercel serverless architecture expertise - Prisma ORM optimization knowledge - Bonus: Timescale/time-series database experience - Bonus: Experience with Claude Code for AI-ass...

1. Project Overview Delight Departures is seeking a skilled development partner to design and build a modern, responsive travel website along with a secure, role-based admin portal to manage tours, customers, pricing, payments, and end-to-end tour operations. The objective is to create a scalable digital platform that not only markets travel packages effectively but also automates internal workflows, reduces manual follow-ups, and enables non-technical staff to manage content and operations seamlessly. 2. Project Objectives Develop a customer-facing travel website showcasing tour packages and itineraries Build a secure admin portal for internal tour, payment, and operations management Enable automation of itineraries, pricing, reminders, and workflows Provide a no-coding admin inter...

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We are seeking a freelancer proxy for a Data Engineer role to support a remote healthcare data platform. The work will be 5 to 6 hours per day. You will be required to sit alongside the engineer during work hours, explain workflows, guide implementation, and help resolve issues in real time. Once the daily work is completed, you are free to handle personal tasks. Key Details: • Freelancer proxy for Data Engineer role • Real-time, hands-on experience required • Work Hours: 5-6 hours per day (Monday to Friday) In US timings • Payment: Weekly • 60-70k Monthly Role Overview: The Data Engineer designs, builds, and maintains scalable data pipelines and architectures to support healthcare workflows. This role ensures data reliability, performance, and HIPAA compliance wh...

My Medusa-powered store needs a focused round of testing and bug fixing. Recent updates have introduced a handful of issues that surface during everyday use—subtle UI glitches, sporadic checkout errors, and the occasional API response that doesn’t match expected data structures. Here’s what I need from you: • Run a thorough test pass across the core storefront, admin dashboard, and any custom modules. • Identify, reproduce, and document each bug with clear steps and console/network traces. • Patch the underlying problems in the Medusa codebase or related plugins, then validate that the fixes hold under real-world scenarios (desktop and mobile). The core stack is MedusaJS with a Postgres database, Redis cache, storefront, and Stripe for payments...

Odoo ERP Customization for Construction Business - API Integration & Automation PROJECT OVERVIEW Construction company seeking experienced Odoo developer to customize our Odoo instance for the construction/roofing industry. Need custom modules, workflow automation, and third-party API integrations. WHAT WE HAVE Odoo instance installed and running Customer records in database Web-based map application (separate system) Server infrastructure (Ubuntu, PostgreSQL, nginx) Comprehensive requirements documentation (provided after selection) WHAT WE NEED 1. Custom Odoo Modules & Fields Custom fields for construction workflows Customer lifecycle: Lead → Prospect → Approved → In Progress → Completed → Invoiced Permit tracking and management Project-specific data fie...

Key improvements I need: • Full user-account module: registration, email verification, login/logout, password recovery and profile management, integrated with Spring Security so roles and permissions stay flexible. • Stateless, scalable sessions backed by Redis; the code must gracefully fall back to the current JDBC session store when Redis is unavailable. • Any additional backend clean-ups you spot during the work (for instance, refactoring the search service or tightening entity validation) are welcome, provided they are scoped and discussed first. You will be working with a Maven-built project that currently uses Spring and Hibernate/JPA with Postgresql. The code compiles and deploys, but the new modules are completely missing. I will give you access to the Git repo...

My database is returning errors on several basic SELECT statements and I need a fresh pair of eyes. The tables are already in place, but the queries either fail to run or return unexpected results. Although the current environment is MySQL, I’m happy to apply a solution that would also work in PostgreSQL or Oracle if the syntax is kept standard. Your task is to review the problem queries, identify the exact source of each error, rewrite the statements so they execute correctly, and give me a brief explanation of every change you make. I’ll provide the schema, sample data, and the faulty statements as soon as we start. Clean, well-commented SQL and a short summary of fixes will mark the work complete.

I need a Java-based web application built with the Spring framework. The core of the project is straightforward: a secure, database-driven site that also exposes and consumes REST endpoints. Here’s what has to be in place for the first production release: • User authentication and role-based authorization handled natively in Spring Security (social login is a bonus, but not mandatory). • A clean set of RESTful controllers that both serve JSON to the front-end and call at least one external REST API, with proper error handling and logging. • A persistence layer wired through Spring Data JPA that lets me create, read, update, and delete records in a relational database of your choice (PostgreSQL preferred if you have no strong opinion). Please structure the c...

Full‑Stack Developers Needed for Modern Media Platform (Spotify‑Style) Project Overview We are building a next‑generation media platform where creators can upload structured media content, add metadata, organize segments (chapters), and publish their work across multiple languages. Think of it as a creator‑driven media platform with: Media uploads Metadata management Segments/chapters Collections (like playlists) Multi‑language support Creator dashboard Admin console Web + mobile clients We are looking for talented developers to help build the platform from the ground up. What We’re Building Core Features Upload and manage media files (video/audio) Add metadata (title, description, tags, categories) Optional segments/chapters for each media item User browsing, searc...

Desarrollo MVP Industrial IoT - Backend FastAPI + Dashboard React + Automatización n8n. Descripción del Proyecto Buscamos desarrollador(es) para construir un MVP de plataforma IoT industrial enfocado en el sector piscicultura. El objetivo inicial es tener un sistema funcional con datos sintéticos para demostraciones comerciales. Stack Tecnológico (Definido): CapaTecnologíaBackend APIFastAPI (Python)Base de datosPostgreSQL + TimescaleDBIngesta de datosMQTT / HTTPAutomatizaciónn8n (open source)FrontendReactTiempo realWebSocket / SSEInfraestructuraDocker, Hetzner Cloud Entregables Esperados 1. Backend Core (FastAPI) API REST para ingesta de datos de sensores Validación y normalización de datos Arquitectura multi-tenant (ai...