Phát triển cơ sở dữ liệu Jobs

Job Title: Senior Cloud Database Engineer – PostgreSQL Migration Architect Location: Remote Work Timing: UK Business Hours (GMT/BST) Engagement Type: Freelance (Long-Term Possible) Platform: Freelancer.com Project Overview We are seeking a highly skilled and experienced Senior Cloud Database Engineer with deep specialization in PostgreSQL migrations and distributed database infrastructure. This role is for a demanding enterprise client, so we require a proven track record of successful large-scale cloud database migrations with verifiable experience. You must be comfortable working during UK business hours and collaborating with cross-functional cloud and infrastructure teams. Role Summary Senior Cloud Database Engineer – PostgreSQL Migration Architect – Data Infras...

Job Description We need a disciplined SQL/data engineer to produce a deterministic, re-runnable script-based build (lean MVP, not enterprise infra). Goal Create a single canonical, one-row-per-company dataset anchored on UEI, then enrich it using exact UEI matches (no name guessing). Inputs (provided) USAspending extract / source tables (L24M window) DSBS export (CSV) with UEI + owner contact fields SAM Active Entity extract (CSV) with UEI + phone + officer names Written Segment B & C rules (explicit) Deliverables 1. USAspending segmentation + canonical vendor table >Filter to last 24 months >Vendor-level aggregation → one row per UEI >Apply Segment B & C logic exactly as written >Deterministic CSV output >Basic QA checks: a. no duplicate UEIs in outp...

I need a turnkey solution that watches a dedicated folder on our local server, reads every stock-dispatch PDF dropped there, and pulls out the roll-level details we receive from multiple vendors—Micron, Size, Roll Number, Gross Weight, Net Weight, Invoice Number, Vendor Name and Dispatch Date. Once captured, that data must flow straight into a master inventory database, stay synchronised, and drive all downstream reports. Key functions I expect: • Continuous PDF scraping from the local path I specify, with no manual trigger required. • Central master inventory that grows with each import; I’m open to whichever SQL back-end you feel best suits the job as long as it is industry-standard and easy for us to maintain. • Live stock dashboards that let me view ba...

If you are expert in building Oracle AI agents and if you have the fusion experience then only bid this project. payment will be released only if the project satisfied or else no payment. it needs to be remote work you just need to guide me i will do in my system. I have a Fusion Application instance and want to layer Oracle AI Agent Studio on top of it so that key customer-facing actions happen automatically. The flow is straightforward: • The agent picks up promise dates and status changes from Fusion. • It updates the relevant “Notes” field in real time. • If a promise is missed, the agent triggers an email to the customer (and a copy to our team). Few of theAPI keys are already available; I simply need you to wire them into Oracle AI Agent Studio, c...

i want to create MS Access database sheet requirement database not to big or hard Database Requirement Explanation I belong to the Indian Army. My unit has a strength of approximately 445 personnel. Every year, individuals remain embodied (on service) and disembodied (service break) for varying periods, usually ranging from 1 to 4 months at a time. I want to create a database (preferably in MS Access) where each individual has a separate profile, and all service periods are calculated automatically. ⸻ Individual Profile Requirements Each individual profile should contain: • Army Number • Rank • Name • Date of Enrollment Example: Army No: 1245 Rank: Sepoy Name: Pankaj Date of Enrollment: 01 Dec 2015 ⸻ Embodiment / Disembodiment Logic For each individual, there can be m...

I need a reliable solution that can pull data from LinkedIn and insert it straight into a database I specify. The core requirement is the automated transfer—once the tool finishes scraping, every captured field should already be sitting in the database ready for queries and reporting, no manual copy-paste. You’ll advise me on the best approach to authenticate, respect rate limits, and minimise the risk of blocks while still collecting the typical profile-level details (name, headline, company, location, experience, education, skills and anything else you can legally obtain). I will confirm the final field list before you begin. Key objectives • Build or configure a scraper / API wrapper that logs in, navigates to each target profile and captures the agreed-upon fields ...

I have a fully-functional ERP written in core PHP with a MySQL backend. The next milestone is an Inventory Management module dedicated exclusively to stock tracking. No supplier or order features are needed at this stage. What I need built • Database changes to record products, stock movements (in, out, adjustments) and current on-hand quantities. • Clean, responsive PHP screens that blend with the existing UI for item setup, stock transactions and a real-time stock level dashboard. • Basic search, filter and export to CSV so staff can pull quick counts. • Low-stock thresholds with email alerts (SMTP already configured in the system). • Clear install/merge instructions and brief user documentation. Acceptance The module must install without breaking e...

I need a fresh, fully-verified database of construction businesses operating anywhere in the United Kingdom. Each record must contain these four fields: business name, direct email address, contact phone number and the company’s trade specialism. Priority sectors are Plumbing, Electrical, Carpentry, Housing & commercial developers and Civil engineering, but I’m happy to accept additional reputable trades if you have them—“any” useful construction lead is welcome as long as the data meet the same quality bar. Please deliver the list in a clean Excel or Google Sheet. I’ll spot-check for duplicates, hard bounces and obvious inaccuracies, so only recent, GDPR-compliant contacts should make the cut. Let me know the volume you can supply, how you verify ...

I currently manage a website built for display management. It runs on a Linux server with an SQL database. Over time, the system has slowed down and is struggling to handle the increasing volume of data efficiently. The goal is to redesign the website using modern technologies and update the overall architecture to improve performance and scalability. All page designs have already been completed in Figma. The platform synchronizes its main database with local databases on connected desktop workstations, and the new version must remain fully compatible with the existing desktop software to ensure seamless synchronization. There are three user roles: Super Admin, Admin, and User, each with specific permissions to manage or view different levels of content. In addition, the UI needs to be...

Sto cercando uno sviluppatore che mi aiuti a trasformare i wireframe di OSSY in un MVP funzionante, pronto per essere testato sul mercato Obiettivo OSSY è una web app / mobile app che mette in contatto famiglie e lavoratori domestici (OSS, badanti, colf) senza occuparsi di contratti o assunzioni. Mi occorrono le funzioni essenziali per lanciare il servizio e validarne l’interesse. Funzionalità chiave • Registrazione utenti tramite SMS, con verifica in due passaggi. • Creazione profilo lavoratore con: esperienza lavorativa, certificazioni, disponibilità e categoria (OSS, colf h24, badante). Possibilità di mostrare il badge “OSS certificata”. • Upload foto e scelta della categoria durante l’onboarding. • Per ...

I want to launch a fully-featured, cloud-hosted lottery platform built on a hardened Node.js backend with a reliable database layer. New players will sign up with a classic email-and-password flow, then complete KYC before they can fund their wallet or join a draw. The exact KYC data points can be finalised together, but the process must be seamless and compliant. Core flow • A user tops up an internal wallet via PayPal (gaming category enabled), buys entries, and watches their balance update in real time. • On draw day a server-side, provably-fair randomiser selects winners; every draw, ticket purchase, and payout is written to an immutable audit log. • From my side I need an admin dashboard that shows live player stats, transaction history, and lets me trigger or sc...

I have a Computer Science systems-design assignment due in three days that focuses specifically on database design. I need a clear, well-structured submission that demonstrates solid theoretical understanding and practical application. Scope – Analyse the problem statement I will share and extract data requirements. – Produce an ER diagram, explain entity choices, relationships, cardinalities, and constraints. – Normalise the model up to 3NF, documenting each step and the rationale. – Provide the final relational schema with primary and foreign keys clearly indicated. – Supply brief written explanations (2–3 pages) that justify design decisions and reference best practices. Acceptance Criteria • Diagram delivered in a common format (PDF or...

Please read carefully before bidding. We are building a production-grade AI-powered building inspection report platform. 90% was built in base44 however, base44 cannot parse pdf"s larger than 10MB, so we have hit a roadblock and decided to take another route. This is NOT: *A WordPress job *A Shopify job *A bubble/no-code job *A “prompt engineering” job *A basic CRUD web app This is a serious backend architecture project involving: PDF parsing (11MB+ technical reports) AI defect extraction Structured data normalization Repair cost estimation logic Long-running job orchestration Background workers / queues Multi-user concurrency Production deployment architecture NOTE: Required Technical Stack (Non-Negotiable) You must have experience with: Node.js or Py...

Mores What functionality do you want the Telegram bot to have? bot que gestione una base de datos de usuarios y realice peticiones HTTP, Automaticas, API-based integration with external game servers (Unity/JSON). No standard SQL ¿Qué tipo de base de datos te gustaría usar? SQL ¿Qué tipo de peticiones HTTP debe realizar el bot automáticamente? The bot requires standard REST API methods (GET, POST, PUT) to interact, interact with JSON-based endpoints and handle authentication headers.

Project Overview Project Name: School Student Attendance System Goal: Build a system that allows teachers/staff to mark student attendance (possibly with location/time), notifies parents via push notifications when the student is ready for pickup or has been picked up, enables parents to confirm/view status, and handles basic student/parent/teacher data. Architecture: • Mobile App (Teachers / Parents) • Oracle APEX Backend (Admin / Reports / APIs) • Oracle Database Duration: 2 Months (8 Weeks) System Architecture 1) Mobile Application Users: • Teachers → mark attendance and deliver students • Parents → Students receive and students tracking. • Security → deliver students (optional) Features: • Login • Class & student list •...

Quero lançar um aplicativo que combine rede social com serviços específicos para bares e restaurantes. A meta é disponibilizar uma primeira versão funcional (MVP) pronta para testes internos em Android e iOS. Funcionalidades essenciais • Perfil do usuário – cadastro, foto, bio curta e preferências. • Mensagens privadas – chat individual entre frequentadores. • Criar mesas – o usuário abre uma mesa virtual, define número de lugares e convida amigos ou deixa pública para quem estiver perto entrar. Fluxo básico esperado 1. Usuário faz login ou cadastro rápido. 2. Cria ou entra em uma mesa ativa no estabelecimento. 3. Conversa por mensagens privadas com outros pa...

I’m looking for an experienced developer/team to build a complete offline-first POS platform that runs reliably on a local network (LAN). The system must keep working when the internet is down, but also support optional online features for some customers (e.g., cloud reporting, multi-site reporting, remote backups, and online ordering integrations). In short: offline by default, online when needed. Two product modes in one codebase A) Hospitality (Restaurant / Bar) Windows POS touchscreen: tables & floorplan, open tickets, split/merge/move, void/refund, discounts, VAT/tax rules Android handheld ordering (PWA or native): fast ordering per table, live sync with POS + KDS, offline queue + retry KDS (Kitchen Display System): new → preparing → ready, station routing (kit...

I need a clean, accurate database of 15,000 accounts-payable contacts at privately-owned companies across the United States. For every record I must have the person’s full name, job title, company name, corporate email, and direct phone. These addresses must pass an email-verification sweep (NeverBounce, ZeroBounce or comparable software) so the final file is ready for outreach with a very low bounce rate. My ideal file arrives as a single CSV or Excel workbook that includes the verification status for each email plus a summary report from the tool you used. Bounce-free delivery is essential; anything over 2 % will require replacement. Please source only true A/P decision makers—no generic “info@” or “sales@” inboxes—and avoid public-sector organ...

I need a techno-functional specialist who knows SAP HANA inside-out to set up an automated pipeline that pulls data from three live modules—Financial (FI), Production Planning (PP) and Plant Maintenance (PM)—and ships it to a remote server on a fixed schedule. Here is what I am after: • Build or configure the job inside HANA Server (HANA DB with query language access, or any proven method you recommend... No additional connector licenses will be bought) so that it extracts the required tables and views, converts the output to clean JSON and pushes it to the destination path via SFTP or a comparable secure protocol. • The transfer must run on a schedule that I can adjust easily (hourly, daily thrice weekly, etc.) without redeploying code. Preferably leave the cr...

I’m building a peer-to-peer marketplace for fashion where people can list, browse, buy, and sell clothing or accessories—think OLX, but fully tailored to style lovers. Core scope • Users must be able to register and maintain personal profiles. • Each seller should create detailed item listings with images, prices, and brief descriptions. • Buyers and sellers need a secure in-app messaging channel to negotiate or ask questions in real time. Please note: I do not require any rating or review system at this stage; the focus is a clean, straightforward exchange platform. I’m open to your preferred tech stack as long as it delivers smooth performance on Android and iOS and can scale later for web. Include the development of a simple admin dashboar...

My WordPress site went offline after I updated the database host setting and I’m now getting a connection error. Everything else—database name and user credentials—remained untouched, so I’m certain the issue is tied to that host change. I need someone who can quickly trace the problem, adjust or any server-side settings as needed, and bring the site back online without data loss. cPanel, phpMyAdmin and SSH access can be provided right away. Deliverable acceptance criteria • Front-end loads normally with no database connection warnings • wp-admin is fully accessible • A brief note outlining the exact fix applied (for my records) If you have solid experience with WordPress, MySQL and typical hosting panels, this should be a straightforward ...

Estoy por arrancar una migración con Informatica PowerCenter y necesito apoyo directo en la construcción de los procesos ETL. El conjunto de datos con el que trabajaremos está en Oracle y lo extraeremos desde una base de datos SQL; el objetivo es una migración limpia, controlada y auditable hacia el nuevo esquema. Qué espero de ti • Diseñar y desarrollar mappings, sesiones y workflows en PowerCenter que cubran todo el flujo de extracción, transformación y carga. • Incluir manejo de errores, validaciones de calidad y registro detallado de eventos. • Documentar cada mapping en el repositorio y entregar un pequeño manual de despliegue/rollback. Aceptaremos el trabajo cuando: - Todos los procesos se ejecu...

i want to develop custom base application in laravel. Check it Find List what we want.

I'm looking for a skilled developer to build a comprehensive customer database platform. The platform is intended to serve multiple purposes including: - Storing contact information - Managing customer interactions - Tracking sales and orders Key features of the database should include: - Ability to add new contacts via manual entry or importing from files - Storing a variety of information such as: - Personal details (name, address, phone) - Customer preferences and history - Contract information - Sales information Ideal skills and experience: - Experience in database design and development - Familiarity with data import functionalities - Strong understanding of data privacy and security - Ability to create user-friendly interfaces for manual data entry Please provide e...

I have a fresh Manatal instance that needs to be structured correctly before we bulk-import roughly 300,000 candidate records. My immediate priorities are: • Field architecture – designing the custom and default fields so every profile, job, and placement record is future-proof and reports cleanly. • Matching logic – fine-tuning job title, sector, department, and location rules so relevant candidates surface instantly. • ATS workflows – mapping each recruitment stage, trigger, and status to match our real-world process while keeping it lean. Once you complete this foundation, another team member will handle the CSV import, so your configuration must be solid enough to absorb that volume without rework. I’ll provide admin access, our current proc...

I need an advanced, fully integrated platform that merges ERP, CRM, HRM, and Accounting into a single, web-based solution aligned with Indian accounting standards (GST, TCS/TDS, e-invoicing, and statutory reports). ERP is the core of the build, and within that the most critical areas are inventory management, supply-chain management, and production planning. The system must seamlessly support multiple branches and warehouses, allowing real-time stock visibility, inter-branch transfers, and consolidated as well as branch-wise financial statements. Production planning should handle bill-of-materials, work-order scheduling, and material requirements. Supply-chain tracking must cover purchase requisitions through to vendor payments, tying directly into the accounting module so ledgers updat...

I'm looking for an experienced .NET Core developer to assist in feature development for my backend, specifically focusing on creating RESTful API endpoints. Key Requirements: - Develop and implement RESTful API endpoints - Ensure scalability and security of the APIs - Collaborate with the frontend team for seamless integration - Write unit tests for the developed features Ideal Skills and Experience: - Proficiency in .NET Core and RESTful API development - Strong understanding of database integration - Experience with authentication and authorization mechanisms - Familiarity with unit testing and CI/CD pipelines Looking forward to your expertise!

I’m running a web application on a custom-built PHP framework and it currently sits on an ageing database that I now want fully migrated to MySQL. The job is strictly a database migration—no codebase refactor is required at this stage—so the focus is on cleanly lifting all existing data structures and records into a fresh MySQL schema while keeping the application functional throughout the transition. What I’ll hand over: the current schema dump (or direct access if you prefer), sample data, and a brief outline of the application’s data flow so you can map dependencies accurately. What I expect back: • A MySQL-ready schema that mirrors the original structure, optimised where obvious gains are available (indexes, data types, constraints). • Reli...

I need a Windows-only desktop application that streamlines how I collect, store, search, and export data. The core focus is reliable data management, so the program must let me create new records, edit them, run quick and advanced searches, and generate simple reports or CSV exports without ever leaving the interface. A clean, intuitive UI is important because I expect non-technical staff to use it daily. Under the hood, I’m open to the stack you feel is most stable—C#/.NET (WinForms or WPF) or a lightweight Electron build are both fine as long as startup time is fast and the installer is straightforward. Local storage can sit in SQLite or a small embedded SQL Server database; just make sure the data file is easy for me to back up. I’ll provide the exact field list and ...

I want a single Power Apps solution that streamlines the full journey of our paper documents—from the moment they’re scanned right through to reporting—while respecting access levels tied to each employee’s position. Here’s what the finished app must do: • Accept scans from both mobile cameras and our existing desktop scanners, automatically saving each file as PDF. • Move every scanned file from point A to point B in our process flow, tracking status at each step. • Capture and store more than 100 000 rows of related metadata. Some of that data will come from manual key-in, and some will be pulled in through automated transcription, so the interface needs to support both methods seamlessly. • Generate ready-to-print templates (l...

I need a MySQL database dump sql hosted on AWS for backup and restore purposes. Key Requirements: - Expertise in AWS and MySQL - Set up MySQL without automated backups

I’m looking to build a lightweight appointment-scheduling module that clinics and hospitals can run from any browser. The core focus is simple: staff should be able to book, move, or cancel appointments in seconds, and every confirmed booking must automatically trigger an SMS reminder that includes the visit’s date and time, the doctor’s name, and the clinic address. The flow I have in mind: • Receptionist (or doctor) opens a clean calendar view, chooses an open slot, selects / creates the patient, and clicks “Save”. • Behind the scenes the system stores the booking and instantly sends the tailored SMS through an integrated gateway such as Twilio, Nexmo, or any equivalent you recommend. • If the slot is later changed or cancelled, a follow-...

I'm looking for a skilled developer who is proficient in the design and creation of E-commerce websites. My main focus is on: - E-commerce website development - Proficiency with JavaScript, particularly React and Node.js - Expertise in implmenting product listing functionalities The ideal person for this project should have a strong background in creating functional, visually appealing e-commerce platforms using JavaScript (especially React and Node.js). You need to be detail-oriented and able to implement smooth product listing features allowing customers to browse through products with ease. A portfolio demonstrating your past E-commerce projects will be invaluable. This project offers the opportunity to harness and show off your JavaScript and product listing skills, so if this...

I'm seeking an experienced developer to create a comprehensive database website for our animal rescue organization. The site needs to streamline various processes and keep everything connected. Key Features: - Application Forms: Adoption, Volunteer, Foster, and Surrender requests - Vetting Process: Track and send vetting information to adoptees - Animal Listings: Display animals in our care - Contracts: Send and manage contracts seamlessly - User Role: Admin Ideal Skills and Experience: - Proficiency in web development - Experience with database integration - Familiarity with application tracking systems - Strong UI/UX design skills - Experience in building secure and user-friendly admin panels Please provide examples of similar work and your approach to this project.

We are looking for a database developer/compiler who can help us develop and maintain our databases. The ideal candidate will have experience with both SQL and NoSQL databases, and will be able to write efficient and reliable code. They will also be able to work with our team to ensure that our databases are up-to-date and meet our needs.