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I’m close to launching a multi-vendor e-commerce site built on a hybrid MERN stack with a couple of critical Django micro-services, but the current API layer still needs love before we can scale like Amazon. My immediate priority is the APIs: I need several new endpoints added and the existing ones profiled and refactored for speed. While doing that, please tighten authentication flows and harden input validation so we close off any common attack vectors. Once the core API work is solid, I’d like your help polishing the React storefront, reorganising some Mongo queries in the Node/Express back-end, and giving the Django services a quick health check. Expect to work with JWT, Passport or similar for auth, Express middle-wares, and Django REST Framework on the Python side. Deliverables • New endpoints documented in Swagger/OpenAPI • Optimised existing endpoints (≤200 ms average response on test data) • Robust auth logic with refreshed JWT handling and rate-limited login • Centralised input validation preventing common injections • Brief hand-off notes so I can maintain the codebase myself If you’re comfortable jumping between React components, Express routes, Mongo aggregations, and Django views, let’s get this over the finish line.
Project ID: 40177190
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Active 3 mos ago
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24 freelancers are bidding on average ₹27,667 INR for this job

As a Full-Stack Developer with extensive experience in MERN and Django, I am equipped with all the necessary skills to not only build, but to refine your e-commerce APIs. Your project specifically demands a freelancer who can seamlessly navigate between React components, Express routes, Mongo aggregations, and Django views - and this is where my strength lies. I have 7+ years of experience in designing and developing clean, maintainable, scalable and secure web applications encompassing intricate front end to the sophisticated backend architecture. In terms of API development, I have substantial knowledge with JWT and Passport to ensure secure authentication for smooth user experience. In addition, my understanding of Express middle-wares and Django REST Framework can undoubtedly help me in profiled refactoring for improved performance and hardened input validation to fortify against potential attacks like common injections.
₹25,000 INR in 7 days
5.4
5.4

Hello sir I am experienced Software developer with Nodejs, Reactjs, django, flask, FatsAPI, swagger and Mongo db as well I am ready to start work immediately and will provide you endpoints that have the <200 ms response Looking for positive response. Best Regards Jitendra Sharma
₹30,000 INR in 10 days
5.2
5.2

Hello. I can help you scale your API layer and finish your multi vendor e commerce site. I am experienced with the MERN stack and Django microservices and can handle the transition between React components, Express routes, and Django views. I will add the new endpoints you need, refactor existing ones for speed, and harden your authentication and input validation to secure the platform. I can also optimize your MongoDB queries and ensure the Django REST Framework services are running efficiently. I am available to start immediately and will provide clear documentation and hand off notes once the work is complete. Please reach out so we can discuss the specific endpoints and security requirements in more detail. Excited to hear from you, Nehal
₹25,000 INR in 7 days
5.1
5.1

⭐ Hello there, My availability is immediate. I read your project post on Python Developer for MERN-Django E-commerce API Upgrade. We are experienced full-stack Python developers with skill sets in - Python, Django, Flask, FastAPI, Jupyter Notebook, Selenium, Data Visualization, ETL - React, JavaScript, jQuery, TypeScript, NextJS, React Native - NodeJS, ExpressJS - Web App Development, Data Science, Web/API Scrapping - API Development, Authentication, Authorization - SQLAlchemy, PostegresDB, MySQL, SQLite, SQLServer, Datasets - Web hosting, Docker, Azure, AWS, GPC, Digital Ocean, GoDaddy, Web Hosting - Python Libraries: NumPy, pandas, scikit-learn, tensorflow, etc. Please send a message So we can quickly discuss your project and proceed further. I am looking forward to hearing from you. Thanks
₹36,200 INR in 10 days
5.4
5.4

Hi there, I definitely get the critical need for a rock-solid API layer, especially when you're aiming to scale a multi-vendor e-commerce site built on a hybrid MERN stack with Django micro-services. Getting those new endpoints added, profiling and refactoring for speed, and then really tightening up authentication and input validation to close off attack vectors is exactly the kind of focused work that makes all the difference before launch. My experience with JavaScript, Python, Django, and NoSQL databases like Couch and Mongo, alongside securing applications on AWS, directly aligns with what you're looking for. I'd suggest we start with a
₹12,500 INR in 7 days
4.7
4.7

✔ I deliver production-grade APIs built to scale Workflow Diagram Current API Audit & Bottleneck Profiling ⟶⟶ New Endpoint Design & Schema Validation ⟶⟶ Auth Flow Hardening (JWT, Refresh, Rate Limits) ⟶⟶ Mongo Query & Aggregation Optimisation ⟶⟶ Django Micro-service Health Check ⟶⟶ React Storefront Polishing ⟶⟶ Swagger Docs & Final Performance Validation Key Highlights ✔ High-performance API refactor — existing Node/Express and Django REST endpoints profiled and optimised to hit ≤200 ms average response time on test data. ✔ Clean, scalable endpoint design — new APIs added with predictable request/response contracts and versioning in mind. ✔ Hardened authentication layer — JWT refresh handling, secure token rotation, rate-limited login, and attack-resistant auth flows using Passport or equivalent. ✔ Centralised input validation — middleware-driven validation to block injection, malformed payloads, and abuse across all services. ✔ MongoDB performance tuning — query refactors, index strategy, and aggregation optimisation for multi-vendor workloads. ✔ Django micro-service sanity check — DRF views reviewed for performance, security, and consistency with the Node layer. ✔ Developer-friendly delivery — Swagger/OpenAPI documentation plus concise hand-off notes so you can maintain and extend confidently. Milestone Description (≈200 Words)
₹15,000 INR in 10 days
3.7
3.7

Hello there, I bring 20+ years of experience in software development and architecture, with deep expertise in MERN stack applications, Django micro-services, and performance optimization. Having led large-scale modernization initiatives and architected distributed systems, I’m confident in helping you stabilize and scale your platform to production readiness. Understanding of Your Needs You’re close to launch, but the API layer requires critical attention before scaling. My immediate focus will be: • Adding new endpoints and documenting them in Swagger/OpenAPI. • Profiling and refactoring existing endpoints to achieve ≤200 ms average response times. • Strengthening authentication flows with JWT refresh handling, Passport integration, and rate-limited login. • Centralizing input validation to prevent SQL/NoSQL injections, XSS, and other common attack vectors. As per your need, I am expert with React/Angular, Django, MongoDB, Node.JS, AWS/AZURE and API development. I am interested in longterm relationship which should be fruitful for both of us. Looking forward a positive response from your end
₹37,500 INR in 15 days
3.8
3.8

✨✨✨✨✨ Hi, I can step in and strengthen your API layer so it’s ready to scale, starting with adding and optimising endpoints, tightening authentication, and hardening validation across the stack. I’m comfortable working in hybrid environments like yours—Node/Express with MongoDB alongside Django REST micro-services—and switching cleanly between React, Express middleware, Mongo aggregations, and DRF views. I’ll profile and refactor existing APIs to hit sub-200 ms response times on test data, implement robust JWT flows with refresh handling and rate-limited login, and centralise input validation to close off common attack vectors. All new endpoints will be clearly documented in Swagger/OpenAPI, and I’ll leave concise hand-off notes so you can maintain and extend the system confidently. Once the APIs are solid, I’m happy to polish the React storefront, clean up backend queries, and run a focused health check on the Django services to ensure everything is production-ready.
₹25,000 INR in 7 days
2.9
2.9

With proficiency in API development, JavaScript, Node.js, and Python, I possess the perfect skillset to catapult your e-commerce site to new heights. Having built numerous platforms, including yours, I'm experienced in crafting APIs that guarantee top functioning and undeniable speed - all that you require for scalability. I am a master at using tools such as JWT, Passport for foolproof authentication, and swiftly optimizing existing endpoints for an average response time of ≤200 ms. Furthermore, as a tech professional with a deep understanding of both the MERN and Django stacks, I ensure a seamless translation between the React storefront and both the Mongo/Express and Django services. This fluency is essential for improving your app's performance from various angles. My knack for detailed documentation will simplify maintenance tasks for you as well. In conclusion, my aim is not to simply complete this job but to take your platform beyond expectations. With my robust technical background empowering your project, you can anticipate timely delivery of optimised existing endpoints, newly generated and well-documented endpoints, secure authentication flows, resilient multi-layered protection against attacks,//and John Cena levels of input validation, i.e., blocking any inj*</script>tions so no unintended vulnerabilities are left exposed*. Let me lead your e-commerce to success through robust development!
₹25,000 INR in 7 days
3.0
3.0

Hi there, You’re absolutely in the RIGHT PLACE. I’ve delivered SIMILAR PROJECTS multiple times and know EXACTLY how to execute this efficiently and correctly from day one. To lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask you a few key questions. Unfortunately, Freelancer’s 1500 CHARACTER LIMIT doesn’t allow me to break everything down properly here. Let’s jump on CHAT so I can show you my PROVEN PAST WORK, walk you through the REAL RESULTS I’ve delivered, and outline a CLEAR ACTION PLAN for your project. You’ll immediately see why my approach is DIFFERENT and EFFECTIVE. If you’re serious about getting this done RIGHT, I’m ready to move forward. Looking forward to CONNECTING and WINNING TOGETHER. Cheers, Mayank Sahu
₹25,000 INR in 7 days
2.2
2.2

I’ve worked on mixed stacks like this before—Node/Express with Mongo on one side and Django micro-services on the other—so jumping between them isn’t an issue. I can refactor and profile your existing APIs, add the missing endpoints, and focus on real performance gains, not surface tweaks. Auth will be tightened properly (JWT lifecycle, refresh, rate limits), and validation handled centrally to close common holes. After the API layer is solid, I’ll clean up the React storefront and review Mongo queries and Django services for bottlenecks. I’ll document everything clearly so you’re not dependent on me later.
₹35,000 INR in 7 days
2.0
2.0

I would be an ideal candidate for your project because my love for coding extends far beyond basic HTML. As someone well-versed in Python, I've gained significant expertise utilizing the MERN and Django stacks throughout my freelance career. By combining my skills with React, Express, Mongo, and Django, your backend is guaranteed to be in capable hands. Efficient optimization is at the core of my programming philosophy, something that translates perfectly into your requirement of shaping up the APIs for speed. Alongside adding numerous new endpoints to make your eCommerce platform fully functional, I acknowledge the importance of tightening authentication flows and hardening input validation for maximum security. Rest assured, I will ensure airtight protection against common attack vectors.I am also proficient in JWT and Passport which will be beneficial to the project. Moreover, as a strong believer in clear communication and knowledge sharing, I will provide you with comprehensive documentation using Swagger/OpenAPI for the new API endpoints, guaranteeing easy maintenance of the codebase beyond completion. Collaborating with me means entrusting your project to a diligent freelancer who consistently delivers fast, reliable, and high-quality results. Reaching that goal line for you would truly bring your eCommerce vision to life!
₹12,500 INR in 4 days
0.0
0.0

Hi, I’ve reviewed your project and I’m confident I can help strengthen and scale your API layer across your MERN stack with Django micro-services. I have hands-on experience with MongoDB, Express, React, Node.js, and Django REST Framework, and I’m comfortable moving between React components, Express routes, Mongo aggregations, and Django views. I can add and document new endpoints using Swagger/OpenAPI, profile and refactor existing APIs to improve performance, and harden authentication using JWT (refresh tokens, rate-limited login, secure flows). I’ll also implement centralized input validation to protect against common injections and review your Django services for performance and reliability. Once the APIs are solid, I can help polish the React storefront and optimize backend queries. This will be my first job on the platform, so you’ll get full dedication, clear communication, and flexibility on pricing. I’m happy to work for a reasonable rate while delivering clean, maintainable code. I’ll also provide clear hand-off notes so you can easily maintain the system. If you’re looking for someone motivated, detail-oriented, and comfortable across the full stack, I’d be glad to help you get this over the finish line. Best regards, Chahin
₹25,000 INR in 7 days
0.0
0.0

I can strengthen and scale your API layer by adding new endpoints, optimizing performance, and securing auth/validation. My process is simple: 1) review & profile APIs 2) refactor for speed/security 3) Polish React + backend 4) document and hand over clean, maintainable code ready to scale.
₹12,500 INR in 7 days
0.0
0.0

Hello, this is Resonite Technologies. We are a full-stack team experienced in MERN + Django hybrid architectures, API optimization, and secure e-commerce deployments. We can help you scale your multi-vendor platform by upgrading and hardening your API layer, while providing React storefront polish and Django micro-service health checks. Our solution includes: New API endpoints fully documented in Swagger/OpenAPI Optimised existing endpoints for ≤200 ms average response times on test data Robust authentication: JWT refresh, rate-limited login, and secure session handling Centralized input validation to prevent injections and common attacks React & Node improvements: reorganized Mongo queries, clean Express middlewares Django micro-service review for stability and efficiency Hand-off documentation enabling smooth maintenance and future updates We have delivered production-ready, secure, high-performance e-commerce systems combining MERN and Python microservices. Our focus is speed, security, and maintainability, getting your platform launch-ready efficiently. Best Regards, Resonite Technologies
₹55,000 INR in 7 days
0.0
0.0

Hi, I’ve carefully reviewed your project and this is exactly the kind of API-focused work I’ve been handling in production systems. I have hands-on experience working with MERN-based platforms combined with service-oriented backends, where performance, authentication hardening, and clean API design are critical before scaling. ? How I’ll approach your requirements: Add and refactor API endpoints in Node/Express with performance profiling to consistently achieve ≤200 ms response times Optimize MongoDB aggregations and queries for scalability Strengthen authentication using JWT (refresh tokens, secure expiry, rate-limited login flows) with Passport or equivalent Implement centralized input validation and middleware-based security to prevent common injection and abuse vectors Review and health-check Django REST Framework services, ensuring clean serializers, views, and inter-service communication Improve React storefront components where API changes require UI refinements ? Deliverables you mentioned — covered: ✔ Swagger / OpenAPI documentation ✔ Optimized and scalable API layer ✔ Hardened auth flows with JWT refresh logic ✔ Secure input validation across services ✔ Clear handover notes for easy maintenance I’m comfortable switching between React, Express routes, MongoDB, and Django views, and I prioritize clean architecture and maintainable code over quick patches. Happy to discuss any existing performance bottlenecks or API pain points before starting.
₹25,000 INR in 20 days
0.0
0.0

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