MongoDB Specialists para contratar
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Contratar shrec
Hi, I want to start by saying thank you for taking the time to read through my profile. I am an IT and Computer Science Specialist with over 15 years of experience in the industry. I have a genuine passion for my work, and love being able to use that passion to create original, creative projects for my clients. I...Hi, I want to start by saying thank you for taking the time to read through my profile. I am an IT and Computer Science Specialist with over 15 years of experience in the industry. I have a genuine passion for my work, and love being able to use that passion to create original, creative projects for my clients. I can work with a large list of different software and coding languages, including: • HTML • CSS • Javascript • Jquery • Front-End Frameworks (Bootstrap, Google's Material Design) • Javascript Frameworks (Angular, React, Vue) • Preprocessors (Less, Sass) • Building Tools (Gulp, Webpack, Grunt) In terms of Mobile Development, I can create projects using the following: • Java • Kotlin • Swift • Object-C • Android/iOS • Ionic Framework • React Native • Dart/Flutter I’ll happily sit down and work with you to build the best possible plan of attack to create and perfect your vision! menos -
Contratar logWeb
Freelancer software engineer and Information System Engineer with a passion for crafting innovative solutions. With +10 years of experience in the industry, I have developed a strong skill set in mobile app development, blockchain, microservices, unit testing, object-oriented programming, functional programming, web...Freelancer software engineer and Information System Engineer with a passion for crafting innovative solutions. With +10 years of experience in the industry, I have developed a strong skill set in mobile app development, blockchain, microservices, unit testing, object-oriented programming, functional programming, web development, and database management. My core skills: * BlockChain: Rust, Solidity, Smart Contracts, Trading Bot. * Mobile development: React Native, Flutter. * Front-end: HTML, CSS, JavaScript, React, jQuery. * Back-end: PHP (Laravel), Node.js, Rest, Kotlin, Solidity, Typescript. * Database: MySQL, PostgreSQL, MongoDB, Redis, Firebase. * Design Patterns, TDD/BDD/Junit/Mocking. * GitHub, GitLab, BitBucket, Jenkins, Docker, Kubernetes. I take a proactive and detail-oriented approach to problem-solving. I enjoy diving into complex challenges and finding elegant solutions. I believe in thorough planning, efficient coding practices, and continuous testing to ensure the highest quality deliverables. I value effective communication and collaboration. I believe in fostering strong client relationships by actively listening to their needs, providing regular project updates, and seeking feedback throughout the development process. I am adept at working independently as well as being a valuable team member when required. If you're looking for a skilled and reliable software engineer to bring your ideas to life, I would be thrilled to discuss your project further. I look forward to the opportunity to work together! menos -
Contratar Herculesz
Principal / Head AI & Full-Stack Engineer with 25+ years of experience architecting, building, and scaling complex software systems across web, mobile, cloud, CMS/eCommerce, and AI-driven platforms. I specialize in delivering production-ready applications from concept to launch, including SaaS platforms, marketplaces,...Principal / Head AI & Full-Stack Engineer with 25+ years of experience architecting, building, and scaling complex software systems across web, mobile, cloud, CMS/eCommerce, and AI-driven platforms. I specialize in delivering production-ready applications from concept to launch, including SaaS platforms, marketplaces, admin dashboards, mobile applications, automation systems, APIs, CMS websites, eCommerce stores, and intelligent AI-powered workflows. I bring a strong combination of full-stack engineering, cloud architecture, DevOps, CMS/eCommerce development, and AI/LLM expertise, with a proven ability to transform complex business requirements into scalable, secure, and user-focused digital products. My experience covers frontend architecture, backend engineering, database design, third-party integrations, real-time systems, performance optimization, CI/CD, observability, and production deployment. Technical Expertise: Frontend: React, Next.js, Vue.js, TypeScript, JavaScript, Tailwind CSS, Material UI, responsive UI/UX implementation Backend: Node.js, NestJS, Express.js, Laravel, PHP, Python, REST APIs, GraphQL, microservices, server-side architecture Mobile: Flutter, React Native, Expo, iOS, Android, cross-platform mobile app development CMS & eCommerce: WordPress, WooCommerce, Shopify, Wix, Webflow, custom theme development, plugin/app integrations, payment setup, product catalogs, checkout flows, landing pages, blog systems, and SEO-friendly website architecture Databases: PostgreSQL, MySQL, MongoDB, Firebase Firestore, Supabase, Redis, database design, optimization, migrations, and data modeling Cloud & DevOps: AWS, Google Cloud, Azure, DigitalOcean, Docker, Kubernetes, Nginx, CI/CD, GitHub Actions, server deployment, monitoring, logging, and observability AI & LLMs: OpenAI API, LangChain, RAG pipelines, AI copilots, conversational agents, semantic search, embeddings, prompt engineering, fine-tuning, Pinecone, pgvector, vector databases, and agentic workflows Payments & Integrations: Stripe, PayPal, Twilio, SendGrid, Firebase, Google APIs, third-party APIs, webhooks, CRM integrations, automation platforms, and API-based business workflows I have a strong track record of designing and delivering scalable SaaS platforms, marketplace systems, mobile apps, admin dashboards, CMS websites, eCommerce stores, automation tools, and AI-driven products that support real business operations. My work combines clean frontend experiences, secure backend systems, optimized databases, cloud-ready infrastructure, flexible CMS solutions, and practical AI innovation. As a hands-on technical leader, I am experienced in mentoring engineers, leading cross-functional teams, making architecture decisions, and aligning technical execution with business goals. I am passionate about building high-quality software that is scalable, maintainable, and ready for real-world users. menos -
Contratar chima25
"We're very happy with Chima's work, and we're ending this project but still keeping him on our payroll." Those were the words of a happy client in the travel industry after I built an AI-powered travel booking web application. And he's continued to hire me over and over again. Now to you who're reading right..."We're very happy with Chima's work, and we're ending this project but still keeping him on our payroll." Those were the words of a happy client in the travel industry after I built an AI-powered travel booking web application. And he's continued to hire me over and over again. Now to you who're reading right now.. Clients come here when: - they want to build something AI-powered - their product needs to feel smarter. - their search is broken, - or their booking flow leaks users, And they need it built clean. That's the exact gap that gets closed here: Web applications that don't just render, but think and respond. AI woven into search, booking flows, discovery engines, and product logic. That's what I build for companies & businesses where UX directly moves revenue. WHAT I BUILD: 🔍Intent-aware search. Not just keywords. Hybrid pipelines (BM25 + vectors + re-ranking) that surface what users mean. ⚡ AI in live systems: booking flows, real APIs, real inventory. Not demos. Not wrappers around ChatGPT. 🏗️ Frontend architecture that scales: Next.js, TypeScript, component systems built to last. 🌍 Proven in production: currently shipping for a luxury travel group (Sweden/Spain) across trip discovery, cruise search & multi-destination booking. 🏠 Strong fit for: Luxury Travel · Real Estate · E-commerce · SaaS tools where search or AI interaction drives conversions. HOW I WORK: - Every project starts from the user problem, not the tech stack. - Whether it is semantic search, a vector database integration, or a streaming AI interface, the goal is always the same: fewer clicks, faster answers, higher conversions. SERVICES - AI integration into existing frontends. - RAG (Retrieval Augmented Generation) pipeline development. - AI-powered search & natural language search UX. - Next.js application development. - API integration. - Vercel AI SDK implementation. - Prompt engineering for product features. MY CORE FRONTEND SKILLS: - Next.js / React (React Hooks, App Router, Server Components, Server Actions) - TypeScript / JavaScript - Tailwind CSS3, SaSS, SCSS, HTML5, Responsive Design - Framer Motion - Radix UI, Shadcn/UI - React Hook Form, Zod, class-variance-authority - Web Performance, Core Web Vitals CORE AI ENGINEERING SKILLS - AI Integration - Vercel AI SDK - RAG (Retrieval-Augmented Generation) - Vector Database / Pinecone - Vector Search / Semantic Search - OpenAI API / ChatGPT Integration - Google Gemini - LLM Integration - AI Chatbot - Conversational AI: BM25 Hybrid, Search Embeddings, Text Embeddings. - Prompt Engineering, - AI-Powered Search, - Reranking / Reciprocal Rank Fusion. - Chunking - Intent Detection. - Natural Language Search. - AI Search UX / Tool Calling / Function Calling TOOLS & WORKFLOW - Git / GitHub - npm / pnpm - ESLint / Prettier - CI/CD Vercel Deployment - Google Maps API - Claude Code If your users deserve a smarter experience, Then do one thing: click the top-right green button, and LET'S BEGIN! Chima menos -
Contratar visionvivante
VISION TO REALITY Preferred Freelancer by Freelancer Vision Vivante is an agency in India dedicated to transforming ideas into scalable, high-performance platforms. With a strong foundation in strategy, design, and technology, we help businesses accelerate growth, simplify complexity, and thrive in the digital...VISION TO REALITY Preferred Freelancer by Freelancer Vision Vivante is an agency in India dedicated to transforming ideas into scalable, high-performance platforms. With a strong foundation in strategy, design, and technology, we help businesses accelerate growth, simplify complexity, and thrive in the digital age. ✅ End-to-End Services: -- Product Strategy & MVP Development -- Concept-to-Launch Solutions -- Product Roadmaps, User Flows & Wireframing -- Technical Architecture & Agile Team Assembly ✅ Custom Software Development: -- Full-Stack Web & Mobile Applications -- SaaS Platforms | Marketplaces | Internal Tools -- API Integrations, DevOps, Cloud Infrastructure ✅ Tech Stack Expertise: -- Frontend: React.js, Vue.js, Next.js -- Backend: Node.js, Laravel -- Mobile: Flutter, React Native -- Database: PostgreSQL, MySQL, MongoDB -- CMS: WordPress, Shopify, Magento, Prestashop, Custom CMS -- Infra: AWS, GCP, CI/CD, Serverless ✅ E-Commerce & Business Platforms: -- Shopify, WooCommerce, Magento -- Auction & Multi-Vendor Systems -- Payment Gateway Integration (incl. Stripe, CashApp, M-Pesa, Mada, HyperPay) ✅ Enterprise & Operational Systems: -- ERP, CRM & Warehouse Management -- Stock Control, Route Planning, Payroll, Ledgers -- Driver & Customer Apps with Live Tracking ✅ Industries Served: >> E-commerce | Fintech | Logistics | Travel | Legal | Education | Real Estate | Healthcare | Fitness | Marketplaces | Social Platforms | SaaS | Pickup and Delivery | POS (Point of Sale) Why Vision Vivante? ✅ Strategy-First Execution ✅ Cross-Platform Development Experts ✅ Agile Teams & Transparent Collaboration ✅ Deep Tech + Business Understanding ✅ Global Clients in 50+ Countries ✅ Fast Turnarounds, Scalable Codebases ✅ Dedicated PMs, Engineers & Designers ✅ Flexible Engagement Models Ready to Build? From digital products to complex systems, Vision Vivante turns your vision into a living, breathing platform. Work with a team that’s technical, strategic, and obsessed with your success. Let’s explore how we can collaborate. menos -
Contratar MinaMaroufIt
I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support...I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support projects from planning and architecture to development, testing, deployment, and ongoing improvement. Here are my key skills: ✔️ AI & LLM Development | AI Applications | Prompt Engineering | Intelligent Automation | AI Workflows ✔️ SaaS Platform Development | Scalable Architecture | Multi-tenant Systems | Admin Panels | Subscription Systems ✔️ Full-Stack Development | Web Applications | Frontend & Backend | REST APIs | Responsive Systems ✔️ Backend Engineering & System Design | API Development | Microservices | Database Design | System Architecture ✔️ Automation & Workflow Optimization | Business Automation | Process Optimization | API Integrations ✔️ eCommerce Solutions | Shopify | WooCommerce | WordPress | Custom Integrations ✔️ Performance Optimization | Debugging | Bottleneck Fixing | Code Refactoring | System Stability ✔️ Cloud & Deployment | AWS | Scalable Hosting | Deployment Pipelines ✔️ Third-Party Integrations | Payment Gateways | CRMs | External APIs | Webhooks ✔️ Dashboards & Admin Systems | Reporting Tools | Analytics Dashboards | Internal Systems ✔️ Product Development Lifecycle | MVP Development | Testing | Deployment | Scaling ✔️ Code Quality & Maintainability | Clean Code | Documentation | Long-Term Scalability I help clients launch faster, automate workflows, and build dependable products that scale. I believe strong products come from clear communication, practical engineering, and consistent execution. My goal is to deliver solutions that are not only functional but dependable, maintainable, and ready for real business growth. menos -
Contratar musafh
I'm a full-stack developer with a bachelor's degree in software engineering. My experience of 6+ years includes building web application in React, Next.js, NodeJS (MERN stack) , Anvil, Python/Django/Flask, PHP / Laravel, AI, LangChain, Workflow automation tools such as n8n / make.com, LLM integration & CMS...I'm a full-stack developer with a bachelor's degree in software engineering. My experience of 6+ years includes building web application in React, Next.js, NodeJS (MERN stack) , Anvil, Python/Django/Flask, PHP / Laravel, AI, LangChain, Workflow automation tools such as n8n / make.com, LLM integration & CMS development such as Shopify, WordPress etc. Moreover, working with me must bring you a set of priorities from the word 'GO' which includes: ✅ English proficiency level IELTS certified (so effective communication won't be a problem) ✅ < 1hr response time with 100% client satisfaction ✅ Top-rated developer on other platforms My tech stack includes: - Full-stack (Front-end & Back-end development) ✅ React/Next.js development / Redux, Redux toolkit, Zustand ✅ Figma to React/HTML, TailwindCSS ✅ MERN Stack Development ✅ Python, Flask, FastAPI, Django ✅ PHP/Laravel/WordPress ✅ Databases (MySQL, SQLite, Postgresql, MongoDB, Firebase) ✅ Web Scraping using Selenium, Beautifulsoup, and Scrapy ✅ Rest APIs and GraphQL development ✅ REST APIs/ GraphQL ✅ Unit testing using Pytest, JEST -- Artificial Intelligence, LLM Development, AI agents and workflow automation ✅ Langchain/LlamaIndex (AI Agents and Tools) ✅ AI Agents, workflow automation: n8n, make.com, zapier ✅ LLM Prompt Engineering ✅ Recommendation Engine ✅ Chatbot development -- 3rd party APIs ✅ Telegram, discord bot ✅ Email services brevo, resend, mailchimp, etc ✅ Paypal, Stripe, Plaid and many other payment platforms. ✅ Instagram, Twitter, Meta ✅ Stock exchange APIs, TradingView Integration -- Deployment: ✅ Vercel ✅ AWS ✅ Lambda Functions ✅ Serverless Architecture ✅ Digitalocean ✅ Heroku ✅ GCP ✅ Docker Let's give it a try! menos -
Contratar mazharsahil12
I am a Senior Full-Stack Developer with extensive experience delivering scalable, secure, and high-performance web and mobile applications. I help startups and established teams transform ideas into production systems that support real operations and long-term growth. I work across the entire lifecycle - discovery,...I am a Senior Full-Stack Developer with extensive experience delivering scalable, secure, and high-performance web and mobile applications. I help startups and established teams transform ideas into production systems that support real operations and long-term growth. I work across the entire lifecycle - discovery, architecture, development, deployment, and continuous improvement. My focus is on building resilient solutions, controlling technical debt, and enabling teams to ship features with confidence. ❇️ Core Expertise ❇️ ➡️ Backend Engineering: JavaScript, Node.js, Express.js, TypeScript, C#, .NET Core, ASP.NET MVC, ASP.NET Web API, Entity Framework, signalR, RabbitMQ, MassTransit, Kubernetes ➡️ Frontend & Web: React, Next.js, Redux, Vue.js, Angular JS, Material UI, Semantic UI, Tailwind CSS, responsive UI development, PSD, HTML, CSS, Bootstrap ➡️ Mobile: React Native & Flutter for iOS and Android, push notifications, offline-ready patterns ➡️ Databases & Storage: SQL Server (complex stored procedures), MySQL, MongoDB, Firebase, Firestore, PostgreSQL,Supabase ➡️ API Design: REST, GraphQL, Swagger/OpenAPI, versioning ➡️ Security & Identity: OWASP best practices, JWT, OAuth, Auth 2.0, Identity Server, role-based access control ➡️ Cloud & DevOps: AWS, Azure, Docker, CI/CD pipelines, environment configuration, logging & monitoring ➡️ AI & ML Tools: GPT-3.5/4/5.5, OpenAI, LangChain, Whisper, ElevenLabs, Huggingface, Stable Diffusion, TensorFlow, Pandas, NumPy, and chatbot development (text + voice). ➡️ Automation & Integration: Web scraping, workflow automation, API integration, Airtable, Notion, Google Sheets, FastAPI, and trading bots (Pine Script), Stripe, PayPal, third-party APIs, webhooks. ➡️ Servers: Dedicated, Shared, VPS, Private Servers ➡️ Design: UI / UX Design, Photoshop, Adobe XD, Figma, Sketch, InVision Legacy Systems & Modernization ➡️ VB.NET, ASP.NET Web Forms, Windows Forms, Desktop applications ➡️ Feature enhancements and module extensions ➡️ Bug fixing and performance improvements ➡️ Refactoring toward maintainable architectures ➡️ Gradual migration to .NET Core / modern stacks ➡️ Stabilizing long-running production systems Architecture & Engineering Practices ➡️ Clean / Layered architecture ➡️ SOLID principles ➡️ Domain-driven design concepts ➡️ Microservices & modular monoliths ➡️ Dependency injection ➡️ Repository & Unit of Work ➡️ Event-driven approaches ❇️ WHAT YOU CAN EXPECT ❇️ ➔ Daily Communication With Quick Replies To Messages ➔ Daily Work Update Report On Worked Things Of That Day ➔ Bug-Free Work With Proper Testing As I Know That Client Is Not Tester ➔ Guaranteed Work ➔ Ongoing Support As Needed Bases Sounds interesting? Let's have a quick Freelancer call/chat to discuss your project. menos -
Contratar REPLATechnology
REPLATechnology REPLATechnology
$30 USD / hora
Top Rated Verified & Confirmed By Freelancer.comPakistanHello, Thank's for taking the time to visit my profile. I’m a Full-stack Experienced Software & Mobile App developer with 10 years of industry experience / Blockchain, Mobile app & Software Development with over 10 years of experience operating as a high-end professional in the Blockchain & Software Industry. My...Hello, Thank's for taking the time to visit my profile. I’m a Full-stack Experienced Software & Mobile App developer with 10 years of industry experience / Blockchain, Mobile app & Software Development with over 10 years of experience operating as a high-end professional in the Blockchain & Software Industry. My clients consistently receive polished work in a timely manner with constant communications and updates. I offer a number of services through my expertise: ● ✔ BlockChain Development ● ✔ NFT Development ● ✔ Software Development ● ✔ Web App Development ● ✔ Artificial intelligence Projects ● ✔ Mobile App Development (IOS & Android) ● ✔ Website Development ● ✔ Application Design (UI / UX) ● ✔ Figma / XD ● ✔ Website Design ● ✔ Brand Identity Design My portfolio is chock full of these design elements, and I highly suggest you peruse it to better understand my style, work & vision. Along with a team of 18 professional developers who aide me in my design, I hold my skills in high regard & would love to use them to help you create a Best Product for your business. shoot me a message! I’m available through Freelancer & will respond ASAP so that we can break down your needs and decide exactly how we will tackle them. Thanks, & have a great day, Regards menos -
Contratar yuliussmayoru
yuliussmayoru yuliussmayoru
$40 USD / hora
Sr. Full Stack | Blockchain | Embedded System | AIIndonesiaHey there! I’m a full stack developer with over 10 years of experience building all kinds of digital products—from websites and mobile apps to blockchain platforms, embedded systems, and AI-powered solutions. I’ve worn a lot of hats over the years, but the common thread has always been solving real problems with...Hey there! I’m a full stack developer with over 10 years of experience building all kinds of digital products—from websites and mobile apps to blockchain platforms, embedded systems, and AI-powered solutions. I’ve worn a lot of hats over the years, but the common thread has always been solving real problems with smart, reliable tech. Whether you’re looking to launch something new or need help improving what you’ve already built, I’m here to jump in and make it work. -Web & Mobile Apps: Clean, responsive designs and solid backend logic. I work with tools like React, Vue, Node.js, Django, Flutter, and more to build apps people actually enjoy using. -Embedded Systems & IoT: I build smart, connected hardware using platforms like Arduino, ESP32, and Raspberry Pi. From prototyping to production-ready firmware, I work with C/C++, MicroPython, and platform-specific SDKs to control sensors, motors, displays, and more. I also integrate these systems with web and cloud services—often adding AI for tasks like real-time data analysis, voice interaction, or image recognition at the edge. -AI & Machine Learning: I integrate tools like GPT-4, Whisper (speech-to-text), and DALL·E into web and mobile platforms—automating workflows, building chatbots, content generators, or even custom AI copilots for your users or team. I also work with Python-based ML frameworks like TensorFlow and PyTorch for custom models and training. -Blockchain & Smart Contracts: I’ve developed and audited smart contracts (mainly Solidity) and built dApps that connect seamlessly with Ethereum, Solana, and BNB networks. Let’s bring your vision to life with clean architecture, scalable code, and tech that lasts. I’m ready to contribute as your long-term tech partner or on-demand expert. menos
