Freelance Backend Engineers in Tamil NaduFreelance Backend Engineers in Tamil Nadu
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Manaazir Rayyaan's avatar
Manaazir Rayyaan
Chennai, India
Full Stack Developer and Graphic Designer
Full Stack Developer and Graphic Designer
Cover image for Voyageur - Travel Planner
Voyageur - Travel Planner
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Cover image for 🌍 Voyageur – Travel Planner
🌍 Voyageur – Travel Planner Platform I built Voyageur, a full-stack travel planning platform designed to help users discover, explore, and book curated travel experiences through a clean and high-performance interface. The goal of this project was to simulate a real-world travel product with scalable architecture, smooth UX, and API-driven content. 🚀 What it does Voyageur allows users to: Explore curated travel packages across multiple destinations Filter trips by budget, duration, category, and preferences View detailed itineraries with hotels, transport, and experiences Save packages to a personal wishlist Book trips with dynamic pricing calculation See live weather insights for destinations Browse visually rich destinations powered by dynamic images 🧠 Smart Features Dynamic Image System Integrated Unsplash API to fetch destination-based images. Each package displays unique visuals with caching and fallback handling to ensure reliability and performance. Optimized Navigation Fixed real-world issues like slow page transitions and blank states by improving data fetching, caching, and route handling. Performance First Approach Implemented lazy loading, pagination, debounced filters, and API caching to keep the experience fast even with large datasets. ⚙️ Tech Stack Frontend React (Vite) Tailwind CSS React Router Context API Backend Django REST Framework JWT Authentication Database MySQL APIs Unsplash API (images) Weather API 🏗️ Architecture The platform follows a clean API-driven architecture: React frontend communicates with Django REST APIs Backend handles authentication, business logic, and data processing MySQL ensures structured and scalable data storage 🛠️ Challenges I Solved Fixed slow routing and blank page issues between views Ensured unique images per destination using API randomization + caching Handled async image fetching without breaking UI Migrated and managed structured data in MySQL Built fallback systems to prevent UI breaks 💡 Why this project matters Voyageur isn’t just a UI project — it demonstrates: Real-world full-stack architecture API integration at scale Performance optimization strategies Clean, maintainable code structure Problem-solving under real development constraints.
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Cover image for Orange Fashions Website
Orange Fashions Website
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Cover image for Hosur All Property
Hosur All Property
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Backend Engineer(2)
Naveen Akash's avatar
Naveen Akash
Chennai, India
MERN Full Stack | React Native | Flutter Developer
MERN Full Stack | React Native | Flutter Developer
Cover image for Wallet Sync - Expense Tracker
Wallet Sync - Expense Tracker
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Cover image for Hostel Pass Management System
Hostel Pass Management System
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Cover image for Event Registration Website for our College's Culturals
Event Registration Website for our College's Culturals
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Cover image for Pass Guardian - Password Manager
Pass Guardian - Password Manager
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Backend Engineer(2)
AKASH SHEORAN's avatar
AKASH SHEORAN
Chennai, India
I have always enjoyed (de)coding complex issues.
I have always enjoyed (de)coding complex issues.
Cover image for AAYRA JEWELLERY
AAYRA JEWELLERY
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Cover image for Xity Project
Xity Project
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Cover image for SD COVERINGS
SD COVERINGS
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Backend Engineer(2)
Mohideen Abubucker's avatar
Mohideen Abubucker
Chennai, India
NodeJS, AWS & React Specialist for Web Apps
NodeJS, AWS & React Specialist for Web Apps
Cover image for Web Based Market Research Consulting Delivery Platform
Web Based Market Research Consulting Delivery Platform
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Cover image for Web Based Client Management Application
Web Based Client Management Application
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Cover image for Web Based Food Services Management Application
Web Based Food Services Management Application
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Backend Engineer(3)
Xenatrix Ai's avatar
Xenatrix Ai
Coimbatore, India
Automation systems & dashboards for businesses
New to Contra
Automation systems & dashboards for businesses
Cover image for Xenatrix AI | Automation &
Xenatrix AI | Automation & Web Systems Freelancer I build automation systems, custom dashboards, websites, and AI-powered workflows that help businesses reduce manual work and improve operations. Because apparently humans decided spreadsheets, repeated tasks, and copy-pasting across 14 apps should continue forever. My work focuses on practical business solutions, not “cool tech demos” that collapse the second a real client clicks a button. What I Build AI Automation Systems WhatsApp & Workflow Automation Custom Admin Dashboards Web Applications & Management Systems Business Websites & E-Commerce Stores API Integrations & CRM Automation AI Voice Bot Workflows Landing Pages & Business Tools Technologies & Tools n8n Automation Laravel Django & Python WordPress REST APIs MySQL HTML, CSS, JavaScript AI Integrations & Workflow Systems Selected Projects AI Restaurant Automation System with 400+ node workflow, AI voice bot, and admin dashboard Restaurant Management Dashboard for operations and order management School Website & Attendance Management System Custom E-Commerce Website Corporate Business Website Construction Calculator Web Tool I focus on building scalable, clean, and business-oriented systems that save time, reduce repetitive work, and improve operational efficiency. Tiny miracle, really.
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Cover image for AI Restaurant Automation Workflow Developed an
AI Restaurant Automation Workflow Developed an AI-powered restaurant automation system that manages customer calls, table bookings, food orders, and operational workflows through intelligent automation. The system processes customer interactions, confirms reservations and orders, and sends order details directly to the Kitchen Order Ticket (KOT) system for faster and more efficient restaurant operations. The platform also includes dedicated User, Staff, and Admin dashboards for managing orders, reservations, workflow monitoring, and operational control in real time. Because one dashboard was apparently too merciful for restaurant chaos. Features AI Voice Call Handling Automated Table Booking System Food Order Management KOT Integration User Dashboard Staff Management Dashboard Admin Control Panel WhatsApp & Notification Automation Real-Time Workflow Processing Multi-Step n8n Automation Workflow API Integrations & Database Management Built using n8n, AI integrations, APIs, and custom dashboard systems to reduce manual work, improve operational efficiency, and streamline restaurant management.
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Cover image for AI Automation Agency Website Designed and
AI Automation Agency Website Designed and developed a modern high-conversion website for an AI automation agency focused on lead generation, workflow automation, and business process optimization. The website was built with a strong conversion-focused structure to clearly communicate automation solutions, business value, and customer pain points. The platform highlights AI-driven systems such as lead capture automation, WhatsApp workflows, CRM integrations, automated follow-ups, booking systems, and voice agent solutions through an interactive and visually engaging interface. Humans apparently need glowing animations and giant headlines before they believe software can save them 40 hours a week. Key Features Conversion-Focused Landing Experience Modern UI/UX Design Interactive Automation Workflow Visualization Lead Capture & CTA Optimization ROI Calculator Section Case Study Presentation Layout Responsive Cross-Device Design Service & Industry Showcase CRM & Automation System Representation Fast Performance & Optimized Frontend Purpose Built to help automation businesses present their services professionally, increase inbound leads, and explain complex automation systems in a simple and visually engaging way. Tech Focus Frontend Web Development Responsive UI Design Interactive Visual Components Business Automation Branding Lead Generation Optimization
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Cover image for Full-Scale eCommerce Platform Developed a complete
Full-Scale eCommerce Platform Developed a complete multi-product eCommerce platform using PrestaShop with a fully functional retail management system. The platform includes product catalogue management, shopping cart functionality, secure checkout flow, and responsive UI optimized for customer conversions. Built to support scalable online retail operations with smooth product browsing and order management. Because modern customers abandon a site if it loads 0.7 seconds slower than their patience. Tech Stack: PrestaShop, PHP, MySQL Corporate Identity Website Designed and developed a professional corporate website focused on brand presentation, service showcase, and lead generation. The website features a clean modern layout, responsive design, structured service sections, and conversion-focused user experience to strengthen the company’s online presence and credibility. Tech Stack: WordPress, PHP, CSS Public School Website Built a fully featured public-facing school website with dedicated sections for admissions, announcements, galleries, blogs, and institutional information. The platform was designed to improve communication between the school and parents while maintaining a clean and accessible user experience across devices. Also integrated with the institution’s management workflow for streamlined content handling. Tech Stack: WordPress, PHP
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Backend Engineer(1)
Subash S's avatar
Subash S
Chennai, India
Building scalable Next.js, Flutter & AI applications
New to Contra
Building scalable Next.js, Flutter & AI applications
Cover image for Cognitive Guardian: Building Cognitive Guardian
Cognitive Guardian: Building Cognitive Guardian was a massive undertaking that pushed me to bridge the gap between physical hardware and cloud infrastructure. Transitioning this from a conceptual idea to a fully integrated digital tether taught me invaluable lessons in full-stack architecture, IoT, and edge computing. Architecting Resilient Systems (Failover Logic): I learned how to design a system that doesn't just fail gracefully, but adapts. Building the "Offline Handshake" protocol taught me how to seamlessly hand over session logic from a smartphone (Cellular/BLE) to a microcontroller (LoRaWAN) when entering network dead zones. Edge AI & Hardware-Software Integration: Instead of relying on cloud-based machine learning (which introduces latency), I learned how to program Edge AI natively on a microcontroller. Writing C++ state machines to calculate 3D acceleration vector magnitudes (via an MPU6050 sensor) taught me how to achieve zero-latency anomaly detection while operating under strict hardware constraints. Polyglot Database Strategy: I leveled up my data engineering skills by realizing one database doesn't fit all. I learned how to route high-throughput, real-time GPS telemetry into MongoDB (leveraging 2dsphere indexes for geospatial queries), while using PostgreSQL for strict relational state tracking, and Hyperledger Fabric for immutable audit logs. Privacy by Design (Self-Sovereign Identity): Handling sensitive medical data taught me modern compliance and security. I learned how to implement Decentralized Identifiers (DIDs) on a permissioned blockchain, ensuring that user data remains encrypted and is only temporarily accessible to authorities via smart contracts during an active SOS. Mobile Battery Optimization & Background Tasks: On the Flutter side, I learned how to handle intensive background processes without killing the user's device. Implementing dynamic location polling tied to the phone's internal accelerometer taught me deep, native-level power optimization for both Android and iOS. Managing High-Velocity Data Streams: Building the Node.js/Express backend taught me how to handle asynchronous data spikes. I learned to implement rate-limiting and use Socket.IO (http://Socket.IO) to bypass standard HTTP request cycles, successfully pushing critical hardware SOS alerts to a React web dashboard in under two seconds.
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Cover image for VitaCare🚀 1. Immutable Health Records
VitaCare🚀 1. Immutable Health Records (Blockchain & AES-256 Encryption) I moved beyond standard database storage to build a Tamper-Proof Medical Ledger. I learned how to implement a hybrid storage strategy where sensitive patient data is encrypted via AES-256 at the application layer before being anchored to a blockchain. This taught me how to ensure absolute data integrity, making medical histories immutable while providing a verifiable audit trail for every access request. 2. Privacy-First Consent Logic (Granular Data Sharing) Architecting the "Time-Limited Access" protocol taught me how to handle high-stakes privacy. I engineered a system where patients can issue temporary, scoped decryption keys to doctors via smart contracts. This taught me how to implement a Zero-Trust architecture, ensuring that healthcare providers only see what they need, exactly when they need it, with access automatically revoking after a set TTL (Time-To-Live). 3. Edge-Optimized Backend & Secure Validation By leveraging Supabase Edge Functions, I learned how to move critical business logic closer to the user while maintaining a "Thick-Client, Secure-Server" model. I architected isolated server-side environments for data validation and healthcare-specific compliance checks, which taught me how to drastically reduce latency in high-volume environments without compromising on server-side security. 4. Proactive Health Intelligence (Predictive Monitoring) I leveled up my AI integration skills by building an Advanced Command Center for Disease Surveillance. I learned how to aggregate anonymized, real-time data from disparate sources—including IoT wearable integrations—to generate heatmaps for disease outbreaks. This taught me the complexity of Geospatial Data Engineering and how to turn passive monitoring into proactive healthcare interventions. 5. Multi-Platform Synchronization (Unified Digital Ecosystem) Building a system that bridges Citizens, Doctors, and Government officials taught me the challenges of Cross-Stakeholder State Management. I learned how to maintain a "Single Source of Truth" across a multilingual Next.js web ecosystem and mobile interfaces, ensuring that a life-saving update on a doctor's portal is reflected on a patient's mobile dashboard in near real-time. 6. Inclusive Design & Localized Accessibility To tackle the diversity of the Indian healthcare landscape, I implemented a Multilingual UI Framework. I learned how to architect a scalable localization layer that supports regional languages, ensuring that the platform is accessible to rural citizens. This taught me the importance of Inclusive UX Engineering—where the technical complexity is hidden behind a simple, high-impact interface for non-technical users.
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Cover image for RAG is only as good
RAG is only as good as the data you feed it. 📄➡️🤖 I am excited to share that I’ve completed the Build an AI-Powered Document Retrieval System with IBM Granite and Docling lab from IBM SkillsBuild! While my previous work focused on the RAG pipeline, this lab went deeper into the most critical step: Document Parsing. We often forget that real-world data isn't clean text—it's locked in complex PDFs and formatted documents. What I built in this hands-on lab: 🔹 Advanced Parsing with Docling: I used Docling to not just "read" text, but to understand the structure of documents, preserving the context for the AI. 🔹 Granite Power: Leveraged IBM Granite models (granite-embedding-30m-english) to create high-quality vector embeddings. 🔹 Seamless Integration: Orchestrated the entire workflow using LangChain to connect the parsed data with the retrieval engine. This skill allows me to build AI agents that don't just "guess" answers but can accurately retrieve information from complex business documents. Technical breakdown of what I built: 🔹 Orchestration: Used LangChain to manage the flow between the user, the database, and the model. 🔹 Embeddings: Leveraged IBM Granite models (granite-embedding-30m-english) to convert text into vector representations. 🔹 Data Processing: Implemented document loading and chunking strategies to optimize context windows. 🔹 Synthesis: Created a system that retrieves relevant data and generates accurate, fact-based summaries. This experience has given me the practical skills to build AI applications that are not just "smart," but also accurate and domain-specific.
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Cover image for MIT Connect🎉 1. Hierarchical Access
MIT Connect🎉 1. Hierarchical Access Control & Multi-Tenant Architecture I moved beyond basic authentication to implement a granular Role-Based Access Control (RBAC) system. By architecting a "Portal-Switch" logic, I learned how to serve distinct frontend environments (Admin vs. Student) from a unified backend, ensuring that administrative actions like fee management and academic overrides are cryptographically isolated from student-level access. 2. Predictive Academic Logic & Real-time Analytics Instead of static data display, I engineered a Proactive Attendance Engine. I learned how to write complex backend aggregation pipelines that don't just calculate percentages, but run "Safe-Miss" simulations. This taught me how to transform raw timestamped logs into actionable insights, helping users predict eligibility before it becomes a critical failure point. 3. Optimized Grid Scheduling & Sparse Data Handling Building the Dynamic Timetable Matrix taught me how to manage high-density relational data with significant "empty states." I learned how to optimize frontend rendering for a 2D coordinate-based schedule (Time vs. Day), ensuring that the UI remains performant and responsive even when mapping hundreds of unique course-section combinations across a decentralized database. 4. Financial Integrity & Transactional Consistency Handling the Invoices and Fee Administration module taught me the importance of ACID compliance. I learned how to architect transactional workflows in the database to ensure that financial records—from generation to payment status—remain immutable and consistent, preventing data drift in multi-step billing cycles. 5. Component-Driven Design & Scalable UI Systems To maintain consistency across the Analytics and Academic modules, I developed a proprietary library of reusable UI components. I learned how to build "Data-Agnostic" widgets—such as the Stat Cards and the Weekly Trend Bar Charts—that can be hot-swapped across different dashboards, drastically reducing technical debt and ensuring a uniform brand identity. 6. High-Throughput State Management Building the Intelligence & Analytics suite taught me how to manage global state across a complex dashboard ecosystem. I learned how to implement optimized fetching strategies (like SWR or React Query) to ensure that when an Admin updates an event or a student marks an attendance hour, the change propagates across the entire system without requiring manual refreshes or redundant API overhead.
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Backend Engineer(1)
Raghvendra Mishra's avatar
Raghvendra Mishra
Chennai, India
App developer that can design better than your mom
App developer that can design better than your mom
Cover image for BharatRail
BharatRail
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Cover image for Coinwatcher
Coinwatcher
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Cover image for Chronos
Chronos
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Cover image for Area - 51
Area - 51
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Backend Engineer(2)