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I'm looking for a skilled back-end developer to create scalable backend systems for Esyglob. There is high potential for ongoing work and long-term project expansion. Key Requirements: - Expertise in MongoDB - API development and integration - User authentication and management - Data processing and storage Ideal Skills: - Strong experience in backend development - Proficiency in handling large datasets - Ability to build secure and efficient authentication systems - Experience with API design and microservices architecture Please provide examples of previous work and relevant experience.
Project ID: 40665549
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45 freelancers are bidding on average ₹47,698 INR for this job

Hi, Your brief calls out I'm looking for a skilled back-end developer to create scalable backend systems for Esyglob. This needs a production-ready workflow, not a generic quick build. I can take ownership of the backend, integrations, data flow, and release process using MongoDB, Database Management, API Development. I bring 11 years of full-stack development and solution architecture experience. Relevant work includes 30+ enterprise web applications across SaaS, ERP, CRM, eCommerce, and automation, where reliable business logic, APIs, database consistency, and operational workflows were central to delivery. I can cover the requested work through: - MongoDB, Database Management, API Development implementation aligned with the stated workflow - Backend APIs, validation, and database design for reliable business processing - Authentication, authorization, and secure handling of application data - Clear error handling, logging, and recovery for failed operations - Third-party API integration and webhook handling where the workflow requires it - Docker/Linux deployment support, environment configuration, and production debugging - Testing of critical paths and edge cases before release I would first map the existing workflow, rules, and integration points, then build in controlled phases with clear testing before deployment. The important part is making the process observable and recoverable in production, not merely getting the first API response working. Is there an existing codebase, API documentation, or preferred deployment environment I should account for? I am immediately available and open to long-term collaboration. Best Regards, Anil Prajapati
₹48,835 INR in 5 days
3.9
3.9

Scalable on MongoDB usually comes down to the index and shard-key choices made on day one, not the framework picked later. Get those wrong and no amount of Node tuning saves you. I'll build the API layer in Node with JWT plus refresh-token auth, model the collections around your real query patterns, and wire structured logging so slow queries surface early. One trade-off worth flagging: microservices sound right, but a modular monolith usually ships faster and splits cleanly later. Past work covers Node and Laravel APIs, MongoDB and Postgres, active since 2018. You can see my past work and reviews here: https://www.freelancer.com/u/shayankhan333 1) Which auth flow, email/password, OAuth, or both? 2) Rough document volume and busiest read pattern? Cheers Shayan
₹50,625 INR in 9 days
3.7
3.7

Hi, The brief lists the stack but not the workload, and with MongoDB the workload is what decides the design. A few questions I'd ask before proposing anything: • What does Esyglob actually do, and what is the dominant read pattern? Mongo rewards schemas shaped around queries, so the wrong embed-vs-reference call early is expensive to undo later. • "Large datasets" — growing collections, high write throughput, or heavy aggregations? Those are three different problems: indexing and shard key, write concern and batching, or a read model built ahead of time. • Auth — first-party users, third-party API consumers, or both? That changes whether you need sessions, JWT with rotation and revocation, or scoped API keys with per-tenant isolation. • Microservices from day one, or a well-modularised service that splits later? I'd usually argue the second unless you already have separate scaling profiles — premature service boundaries cost far more than they save. My background is Python and FastAPI: API design, auth, background processing, and data pipelines handling continuous high-frequency market data — which is essentially a large-dataset ingestion, storage and query problem under latency pressure. Happy to walk you through a live system. Since you mention ongoing work, I'd suggest starting with one well-defined service rather than the whole platform. It gives us both a real read on how we work together before committing further. What's the first piece you need built?
₹40,000 INR in 7 days
3.8
3.8

**DO NOT PAY ME UNTIL I COMPLETE! :)** Hello my valuable client :) I can definitely work on your working hours. My profile is new over here but I have 7 years of experience in this field. I have completely understood about your project. Also I will provide you free maintenance on your project for 1 year after project completion. Give me one chance to prove myself. Hit the chat button to get started. If you will not like my work then you dont need to pay me any money so dont worry and have faith in me :) I am eagerly waiting for your message.
₹37,500 INR in 7 days
3.9
3.9

Hi, I can develop scalable backend systems for Esyglob with secure APIs, MongoDB data storage, authentication, and a clean architecture ready for long-term expansion. My approach will be to first understand your product workflow, data structure, user roles, API requirements, and expected traffic. Then I’ll design and build a backend that is modular, secure, and easy to extend as new features are added. I’m comfortable with: * Backend development * MongoDB schema design * REST API development * API integrations * User authentication * Role-based access * Data processing workflows * Large dataset handling * Microservices-style architecture * Security and performance optimization Deliverables: * Scalable backend architecture * MongoDB database setup * Secure authentication system * User management APIs * Core business APIs * Data processing/storage logic * API documentation * Clean source code * Deployment/setup instructions * Testing support I’ll focus on building a reliable backend foundation for Esyglob that can support current requirements and future product growth. Best regards Ankit
₹37,500 INR in 7 days
3.5
3.5

With over a decade of experience as software developers, my team and I possess all the skills you seek for this high-level project. We have deep expertise in backend development, having architected complex systems that manage large datasets while keeping them secure and efficiently running with end-to-end authentication. Our proficiency in MongoDB, API development and integration, user authentication, and data processing aligns perfectly with your requirements. Moreover, we don't just build applications; we construct scalable backend architectures ready to handle heavy user traffic. This aligns with your objective of future expansion for Esyglob. Having supported numerous startups and businesses in launching MVPs and improving existing products, we understand the bumps and redirects in your entrepreneurial journey. In closing, ours is a partnership that entails meticulous attention to detail combined with team-level execution—ready to take on any challenge Esyglob has to offer.
₹37,500 INR in 7 days
3.2
3.2

HI BRO, LET TALK ATLEAST I AM 100% SURE THAT I CAN SUITABLE FOR YOU. +8 EXP BACKEND DEV Hi, I’m an experienced backend developer with strong expertise in MongoDB, REST APIs, authentication, user management, and scalable data processing. I can build a secure, maintainable backend for Esyglob and am available for long-term development and ongoing improvements.
₹56,250 INR in 7 days
3.2
3.2

With my extensive six years of experience in web and app development, I believe I am the ideal candidate for your project. Having developed countless scalable applications tailored for unique business needs, I have a particular proficiency in handling large datasets - precisely what is needed for your backend systems at Esyglob. My specialization includes user authentication and management, API development, and integration, giving you the assurance that your project will not only be secured but also well-connected. One of the standout attributes I bring to the table is my skills in MongoDB - a requirement in your project description. By leveraging this NoSQL database technology, I can efficiently process and store data at scale for you. Additionally, I'm adaptably skilled in building secure and efficient authentication systems. With the growing concerns of data privacy and security breaches, this competency is especially valuable. In selecting me for this project, you're not just getting a backend developer but also a partner who's committed to delivering high-quality, reliable, and performance-driven solutions that not only meet but exceed expectations. Let's collaborate to turn your ideas into powerful digital products that will drive Esyglob's success well into the future.
₹37,500 INR in 7 days
3.1
3.1

You can click a live Esyglob backend sample in 24 to 48 hours: login plus one real user action. I can start right now. You get a working login and one path through your data, so you see the product, not a plan. I run live APIs, login systems, and cloud databases every day. That sample is the database working on your product, then we add the APIs, storage, and microservices. If it feels right, we keep going, and the budget follows what you actually need. Which user action should that first sample cover?
₹42,000 INR in 3 days
2.6
2.6

Hi, I’d be glad to help build a scalable and reliable backend for Esyglob and become a long-term development partner. I have strong experience designing backend systems with MongoDB, REST APIs, authentication, data processing, integrations, and production-ready architectures. I can build secure user registration/login, role-based access, authentication flows, efficient database structures, API integrations, validation, error handling, and scalable data-processing workflows. I’m also comfortable working with large datasets and designing modular services that can evolve into a microservices architecture as the platform grows. My focus will be clean, maintainable code, optimized database queries, secure APIs, proper indexing, and reliable performance. I can also integrate third-party services and work with your existing frontend/application architecture. I’m interested in the ongoing nature of Esyglob and can take ownership of backend development as requirements expand. I’d be happy to review your current requirements and discuss the best architecture and implementation approach.
₹58,000 INR in 7 days
2.2
2.2

Your brief names microservices as an ideal skill. At this stage that is usually the expensive choice, and I would push back first. Microservices buy independent scaling and cost you distributed transactions, network failure modes, and no single place to run a query. A modular monolith with hard internal boundaries gives you the same discipline, and you extract a service later when a real scaling axis appears. On MongoDB and large datasets, the failure is almost always index design, not volume. Mongo will happily run an unindexed query as a collection scan: fine at ten thousand documents, fatal at ten million. Compound indexes only help when field order matches equality, then sort, then range. Documents also cap at 16MB, so anything growing without bound - activity logs, event arrays - needs its own collection from day one. On authentication, the risk is not password hashing, it is revocation. Stateless tokens with no rotation and no denylist mean you cannot log anyone out or respond to a stolen token. That decision comes first. You asked for examples of previous work. I will not send a list I cannot substantiate - judge me on the three points above. 37,500 INR and 5 days for schema, indexes and the auth service. I would quote the rest once the data model is agreed. Aakaash
₹37,500 INR in 5 days
1.6
1.6

Hi, I’m interested in helping build the scalable backend infrastructure for Esyglob and potentially supporting the platform through its longer-term development. I’d recommend Node.js/NestJS + MongoDB for the backend, with a modular architecture that keeps the codebase maintainable while allowing individual services to scale or be separated later when the product actually requires it. My approach would cover: • Secure authentication and user management • Well-structured REST APIs and third-party integrations • MongoDB schema design, indexing and efficient querying • Data processing and storage workflows • Validation, error handling and API security • Scalable architecture for growing datasets and users • Clear API documentation and maintainable code I would avoid introducing unnecessary microservice complexity at the beginning. A properly structured modular backend can provide a stronger foundation, with services separated when there is a genuine performance or scaling requirement. I’m particularly interested in the long-term opportunity here, as I can work alongside your team as requirements evolve rather than treating this as a one-off backend build. I’d be happy to review Esyglob’s current architecture, API requirements and expected data volume before proposing the implementation plan. Best regards, Deepak
₹40,000 INR in 7 days
1.5
1.5

Hello there, we are a team of senior Full Stack Web and Mobile App Developers. I will create your application back system. Let's connect for a meeting and start the work. Thanks Ashish Kumar.
₹76,250 INR in 21 days
2.2
2.2

Hi, I have reviewed your requirements and understand that you need a scalable backend system for Esyglob with a focus on MongoDB, API development, authentication, and data management. I have experience building secure backend solutions, designing REST APIs, integrating third-party services, and creating database architectures that can handle growing datasets. I can help with building a reliable backend architecture that is optimized for performance, security, and future expansion. I would like to know more about your current stack, project scope, and specific backend features required so I can suggest the best approach. Looking forward to discussing further.
₹56,250 INR in 3 days
0.0
0.0

Hello, I understand that you need a robust backend system for Esyglob that can scale effectively as your user base grows. My approach focuses on building a solid foundation using MongoDB for efficient data management and ensuring seamless API integration to enhance user experience. I prioritize secure user authentication and management, ensuring your system remains robust against potential threats. My experience includes handling large datasets and designing microservices architectures that facilitate easy expansion and maintenance. Communication is key, so I will keep you updated throughout the development process, ensuring we align on goals and timelines. What specific data processing requirements do you have in mind? Also, are there any existing systems or technologies we need to integrate with? Regards, Soné Joubert
₹37,500 INR in 14 days
0.0
0.0

Hi, I can build a secure and scalable backend for Esyglob using MongoDB, REST APIs, authentication, data processing, and clean modular architecture. I’ll focus on performance, security, scalability, and maintainable code, with API documentation and proper database structure. I’m also available for long-term development and future feature expansion. Please share the current requirements or architecture so I can confirm the scope and timeline.
₹50,000 INR in 2 days
0.0
0.0

Hello, I am a backend developer with experience in SQL Server and a good understanding of MongoDB (document-based databases).
₹45,000 INR in 7 days
0.0
0.0

Hi, I’ve reviewed your requirements and understand that you need a scalable backend foundation for Esyglob, with MongoDB, secure authentication, API development, data processing, and room for long-term expansion. I can build and maintain: * RESTful API development and integrations * MongoDB database design and optimization * Secure authentication and user management * Data processing and validation * Large-dataset handling * API security, error handling and logging * Modular/microservice-ready backend architecture * Clean, maintainable and documented code I’ll focus on building the backend in a way that can scale as Esyglob grows, rather than creating a solution that only works for the current requirements. I’m comfortable working with existing systems as well as building backend services from scratch, and I’m interested in a long-term development relationship if the initial work goes well. Please share the current architecture, API requirements or repository details, and I can review them and discuss the best implementation approach. Best Regards, **Ubaid Alam** Backend Developer | MongoDB | APIs | Node.js | Microservices
₹37,500 INR in 4 days
0.0
0.0

Creating scalable backend systems for Esyglob is crucial for supporting your growth and ensuring a seamless user experience. Given the emphasis on MongoDB, API development, and secure user authentication, it's vital to establish a robust architecture that can handle large datasets efficiently. I propose to implement a microservices architecture that allows for flexible scaling and easy integration of new features. By focusing on best practices in API design, I can ensure smooth interactions between the frontend and backend while maintaining high security through robust authentication protocols. My previous work on a similar project involved developing a backend for a data-driven application that required real-time data processing and user management, which resulted in improved performance and user satisfaction. The value of this approach lies in its ability to adapt to future demands, ensuring that Esyglob can expand without compromising on performance or security. I look forward to discussing how we can set a strong foundation for your backend systems. Let's create something that not only meets your expectations but sets a new standard for quality. Regards Junaid
₹37,500 INR in 7 days
0.0
0.0

We have over 5 years experience with scalable backend development projects for various tech startups. You're looking to create a robust backend system for Esyglob that can handle user authentication and manage large datasets effectively. To address your requirements, I would focus on building a secure API using MongoDB for data storage and processing. My approach includes designing a microservices architecture that allows for easy integration and scalability as your needs grow. I prioritize clear communication throughout the project to ensure alignment with your goals. Deliverables: - API development and integration - User authentication system - Scalable database design - Data processing workflows - Documentation for ongoing maintenance I am happy to share relevant examples of my previous work. Could you clarify any specific features you envision for user management? Regards, RyanF172
₹37,500 INR in 7 days
0.0
0.0

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