
Closed
Posted
Paid on delivery
I’m working on expanding my product and now need a brand-new backend feature built from scratch. The focus is purely server-side: data handling, business logic, and secure API endpoints. I’ll share the existing codebase and functional requirements once we connect, but in broad strokes the job involves: • Designing the data model and logic for the feature • Implementing clean, well-documented code and tests • Exposing the necessary endpoints and making sure they slot smoothly into the current API You’re welcome to recommend the language or framework you believe is best for the task, so long as the final solution is performant, maintainable, and easy for my team to extend. If this sounds like your kind of challenge, tell me how you’d approach it and any relevant projects you’ve completed.
Project ID: 40620744
239 proposals
Remote project
Active 3 days ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
239 freelancers are bidding on average $424 USD for this job

Hi there, We understand you're looking to develop a new backend feature for your product, focusing on server-side development including data handling, business logic, and secure API endpoints. At Webbook Studio, we have extensive experience in backend development, having worked on various projects such as a learning platform website and an e-commerce website for a luxury leather retailer, utilizing PHP, JavaScript, and MySQL. We'd approach this project by designing a robust data model, implementing clean and well-documented code, and exposing necessary endpoints to ensure seamless integration with your current API. Can you share more about your existing tech stack and what you envision for the new feature's functionality? Feel free to message us to discuss the details! — Webbook Studio
$510 USD in 10 days
9.2
9.2

I am well-equipped to architect a robust backend feature for your project, focusing on a well-documented, scalable, and maintainable codebase. By designing a solid data model, implementing efficient business logic, and ensuring secure API endpoints, I aim to enhance your product's foundation. I will carefully choose the language and framework best suited for your project's performance and scalability needs. It is essential to understand your scalability requirements, expected user load, and future integration plans to tailor the solution effectively. My goal is not only to meet but exceed your expectations, delivering a solution that aligns with your long-term goals. I commit to providing reliability, responsiveness, and timely delivery, supporting your growth and innovation beyond our initial collaboration. Let's explore your project specifics further to create a successful partnership.
$675 USD in 5 days
8.8
8.8

With CnELIndia, you're gaining access to two decades of experience perfecting our skills in MySQL, PHP, and other essential web technologies. Choosing us for your backend feature would mean entrusting your project to a dedicated team that's well-versed in designing scalable data models and implementing business logic. We understand the importance of secure API endpoints and will ensure that your solution is both performant and maintainable, while fitting seamlessly into your current system. One advantage that sets us apart is our proficiency in React Native. Although it may not be directly applicable to this project, it speaks volumes about our adaptability and willingness to explore new terrains. We believe in pushing boundaries when necessary, always with an eye toward providing holistic solutions. Perhaps most significantly, we at CnELIndia deeply appreciate the value of clean, well-documented code and rigorous testing. Moreover, our extensive portfolio brims with projects similar in nature to yours, reflecting precise attention to detail and ensuring prompt delivery without compromising quality. Give us a chance to be part of your team, and we'll exceed all your expectations from day one!
$500 USD in 7 days
9.0
9.0

Hi — Elias here from Miami. I understand you’re looking to expand your product with a new backend feature. This is a crucial step to enhance your offerings and meet user expectations effectively. What usually matters most here is ensuring the system remains scalable and maintainable as it grows. A common issue in projects like this is managing complex integrations and ensuring efficient workflows. The tricky part is usually anticipating how changes might affect existing functionalities and user roles, especially with future expansions in mind. My approach would involve structuring the backend to prioritize stability and ease of updates. I’d focus on clear API development and robust database design using MySQL, ensuring optimal performance while allowing for seamless integrations. I’ve worked on similar backend projects where modular design was key to maintaining performance while accommodating user growth. This experience helps me foresee potential challenges before they arise. A few questions to better understand the scope: Q1 – What specific user roles and permissions do you envision for this feature? Q2 – Are there existing systems or APIs that this new feature needs to integrate with? Q3 – What are your scaling expectations as your product grows? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$600 USD in 3 days
8.7
8.7

Hi, I reviewed your project to develop a brand-new server-side backend feature from scratch, covering data handling, business logic, and secure API endpoints that fit your current API. I’ll implement the feature end-to-end using PHP and Software Development practices, including clean API Development with well-documented logic, a solid data model, and tests to keep behavior reliable as your team extends it. I focus on maintainable code structure, secure request handling, and fast, predictable performance. Let’s discuss here now.
$250 USD in 30 days
8.5
8.5

Hi there, I will design the data model, implement the business logic, and expose secure API endpoints that integrate cleanly with your existing API structure. You will get well-documented code with full test coverage, ready for your team to extend. On a recent backend feature build, shipping with contract tests against the existing API caught three integration issues before staging. I will apply the same approach here. Questions: 1) What language or framework is your current codebase in, or is this greenfield with no constraints? 2) Do you have authentication already in place (JWT, OAuth), or does this feature need its own auth layer? Share the repo and functional requirements and I will outline the data model and endpoint spec within 48 hours. Ready to start whenever you are. Kamran
$282 USD in 10 days
8.7
8.7

Hi there, I can see the hidden goal here: you need a backend feature that feels native to the product, not bolted on. That usually means clean data modeling, reliable business logic, and endpoints your team can extend without future rewrites. I’ve built server-side features across PHP/MySQL, Laravel, REST APIs, and database-backed business tools, and I’d approach this by first mapping the feature rules, then designing the schema, implementing the API layer, and adding tests so the behavior stays stable as the product grows. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. If it helps, I can start by reviewing your current codebase and outlining the safest implementation path, then move into development once the requirements are clear. What is the main business outcome you want this backend feature to improve or enable for your users? Looking forward to your reply so we can finalize the exact plan. Best regards, Asad
$250 USD in 10 days
8.3
8.3

⭐⭐⭐⭐⭐ Build a New Backend Feature with Secure API Endpoints ❇️ Hi My Friend, I hope you are doing well. I reviewed your project details and see you're looking for a backend feature to enhance your product. You don’t need to search anymore; Zohaib is here to assist you! My team has completed over 50 similar projects focused on backend development. I will design the data model, implement clean code, and ensure smooth integration with your existing API. ➡️ Why Me? I can easily create your backend feature as I have 5 years of experience in backend development, focusing on data handling, business logic, and API design. My expertise includes working with various programming languages and frameworks, ensuring a robust and efficient solution. I also have strong skills in testing and documentation to keep the code maintainable. ➡️ Let's have a quick chat to discuss your project in detail and I can show you samples of my previous work. I look forward to our conversation! ➡️ Skills & Experience: ✅ Backend Development ✅ API Development ✅ Data Modeling ✅ Business Logic Implementation ✅ Clean Code Practices ✅ Unit Testing ✅ Documentation ✅ Performance Optimization ✅ Database Management ✅ Security Best Practices ✅ Framework Proficiency ✅ Version Control Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
8.1
8.1

Building a clean, well-tested backend feature that slots smoothly into your existing API is exactly the kind of server-side work I focus on. Once you share the codebase and requirements, I'd start by studying your current conventions — framework, folder structure, auth and error-handling patterns — so the new feature feels native rather than bolted on, then design the data model and business logic before writing a line of endpoint code. I'd typically reach for Node.js/TypeScript or Python (FastAPI) with a well-normalised database, exposing secure, validated endpoints with proper auth and input checks, plus unit and integration tests and clear documentation so your team can extend it easily. I'll match whatever stack your codebase already uses. I can start right away.
$250 USD in 1 day
7.7
7.7

Hi, I checked your "Develop New Backend Feature" project and it looks like understanding the existing workflow will be important before making any changes. I've worked on similar PHP projects involving php, javascript, software architecture, mysql, node.js, software development, backend development, database design, api development and prefer delivering work in small milestones so everything stays easy to review and adjust if needed. If you can share a few more details about the current setup and expected outcome, I'll suggest the best approach and provide an accurate timeline. ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$450 USD in 9 days
7.7
7.7

I can take this from data model through to tested, documented API endpoints. Once you share the codebase and requirements I'll design the schema/logic so it fits your existing conventions, implement the business logic with clear separation of concerns, and expose clean REST endpoints with input validation and error handling. I'll write tests covering the core logic and edge cases, document the new endpoints in the same style as your existing API docs, and make sure everything is structured so your team can extend it without fighting the code later. Happy to work in whichever language/framework matches your stack, or recommend one if you're open to suggestions.
$450 USD in 10 days
8.2
8.2

Hi, this reads like a net-new backend capability being added to an existing product, which is usually less about writing endpoints and more about fitting new domain logic cleanly into the current system. The real engineering risk is coupling the new feature too tightly to the existing data model and API surface, which creates regressions and makes future extension expensive. I’ve built several production systems like this and I usually start with a codebase walkthrough, current domain boundaries, and the contract this feature needs to preserve. From there I define the data model, service-layer rules, auth boundaries, and endpoint behavior before implementation starts. The closest match here is Custom Feature Development & Integration, where I dropped into a live product, reviewed the codebase, implemented custom functionality, added tests, and documented handoff. NYSE Day Trading Bot Development is also relevant on the business-logic side because it required strict rule execution and reliable API behavior. I typically design this by separating persistence, business rules, and transport layers so the feature is testable without binding core logic to controllers. If MySQL is already central, I’d be careful about schema changes, migration safety, and idempotent write paths. These are the kinds of backend systems I design for long-term production use. If useful, I can sketch the feature architecture and API boundary after a brief code walkthrough. Thanks, Hercules
$500 USD in 7 days
7.6
7.6

Hello!! I have similar expertise and work experience for the **{{ DEVELOP NEW BACKEND FEATURE }}** project. I have developed backend systems, API-driven applications, database solutions, and scalable server-side features for various platforms. I have 10 years of experience in backend application development, with strong expertise in designing data models, implementing business logic, building secure APIs, database optimization, testing, and integrating new features into existing codebases. I understand your requirement for developing a new backend feature from scratch, including architecture planning, database design, API development, validation, testing, and seamless integration with your existing system. I can help you build a clean, maintainable, and scalable backend solution with well-structured code, proper documentation, secure endpoints, and a design that allows your team to easily extend the functionality in the future. My focus is on delivering reliable backend features with optimized performance, strong security practices, and smooth integration into your current product architecture. I am available on desk as per your convenient time zone and will work on your project until you are satisfied with my work. Thanks, Christina
$500 USD in 7 days
7.7
7.7

Hello!, This is James from Hollywood... I read your project details carefully, and I understand you need a brand-new backend feature built from scratch for your expanding product. That means this isn’t just coding a small piece, it needs clean architecture, solid database design, and an API that’s reliable and easy to maintain. I have 15 years of experience building backend systems with PHP, Node.js, MySQL, and JavaScript, including APIs, custom logic, and production software that has to be stable and scalable. My process is straightforward: understand the business goal, design the data flow, build it in a clean way, and test it properly before delivery. For this kind of feature, I’d usually work in phases: 1. Review the current backend and requirements 2. Define the data model and API flow 3. Build the feature in small, testable parts 4. Validate edge cases and integrate safely Could you please clarify the following questions to help me better understand the project? 1. What exact business outcome should this new backend feature achieve? 2. Do you already have an existing backend structure, or should this be designed from scratch? 3. Are there any specific performance, security, or integration requirements? I’m serious about getting the details right, and I pay close attention to the small things that usually decide whether a backend feature works well long term. Looking forward to discussing it.
$550 USD in 3 days
7.2
7.2

Your new backend feature will be easiest to maintain if the data model and business rules stay separate from the API layer. I'd start by reviewing the current codebase before deciding whether to extend the existing stack or introduce anything new. From there I'd design the data model, implement the business logic, expose the required endpoints, and add tests so the feature fits naturally into the existing API. One thing I'd pay close attention to is keeping validation and authorization consistent across every endpoint to avoid hard-to-track issues later. I've worked on PHP backend development before (Aras), so I'm comfortable building server-side features that integrate into an existing codebase rather than standing alone. Can you share how the current backend is structured and whether this feature needs to work within an existing API architecture or introduces a new module?
$500 USD in 7 days
7.0
7.0

Hi there! I'm Markiyan, a full stack developer and CEO of a web agency, and I'd love to help you build this new backend feature from scratch. I understand you need a brand-new server-side feature focusing on data handling, business logic, and secure API endpoints, which involves designing the data model and logic, implementing clean code and tests, and exposing necessary endpoints to slot into your current API. My team and I have extensive experience in backend development, having completed projects like a learning platform website and a custom CRM/ERP system, utilizing technologies such as PHP, Node.js, and MySQL, which could be a great fit for this task. I can deliver a well-structured, performant, and maintainable backend feature with secure API endpoints and proper documentation. One question: do you have any preferences for the technology stack or would you like me to recommend the best approach based on your existing codebase and requirements? Feel free to message me to discuss the details! — Markiyan
$460 USD in 10 days
6.9
6.9

With over 8 years of hands-on experience in web and app development, I have a deep understanding of the backend landscape. API development, an essential part of your project, is my forte and together with my proven skills in Node.js, MySQL and JavaScript, I am confident that I can deliver a robust and reliable solution for your new backend feature. Not only am I proficient in backend technologies, but I also have a good grip on frontend tools like React.js and Redux, making me well-equipped to ensure the new feature is seamlessly integrated into your existing system. The added knowledge of cloud services like AWS and GCP, will further help me create a scalable solution that will accommodate your present as well as future needs. I believe in comprehensive collaboration with my clients to understand the unique demands of each project. With this approach, I can confidently say that I am not only capable of rebuilding your backend feature but also ensuring it's strategically positioned for easy maintainability by your team post-development. To sum up, with my impeccable skillset, extensive experience and professional dedication to excellence, I guarantee you top-notch backend development tailored specifically for your requirements.
$500 USD in 7 days
6.7
6.7

Hello, I bring 10 years of experience developing scalable backend systems using Node.js, Laravel, PostgreSQL, MySQL, REST APIs, and cloud deployment. Based on your requirements, I recommend Node.js with PostgreSQL for building a high-performance, maintainable backend feature that integrates seamlessly with your existing application while remaining easy to extend. My approach begins with reviewing your current architecture to ensure the new module aligns with existing patterns. I then design an efficient data model, implement secure REST APIs, optimize business logic, and add thorough testing and documentation. I'd be glad to discuss your existing codebase and the best implementation strategy for this feature. Best regards
$250 USD in 7 days
7.0
7.0

Hi there, I'm ready to tackle the backend feature you're looking to build from scratch. To begin, I would recommend using PHP and Laravel for a robust and maintainable implementation, leveraging my experience in designing data models and creating secure API endpoints. I can ensure that the code will be clean, well-documented, and accompanied by thorough tests to fit seamlessly into your existing codebase. Please let me know more about your current setup and any specific requirements you have in mind. Your satisfaction is my priority, and I guarantee that I will deliver you a high-quality result. Regards, Ali
$250 USD in 10 days
6.4
6.4

I can design and build the backend feature from scratch, including the data model, business logic, secure API endpoints, validation, tests, and documentation. I’m experienced with Laravel, Node.js, TypeScript, PostgreSQL, and REST APIs, and I’ll integrate the feature cleanly into your existing architecture without unnecessary rewrites.
$250 USD in 3 days
6.5
6.5

Johannesburg, South Africa
Member since Aug 2, 2026
₹37500-75000 INR
$250-750 USD
$30-250 USD
$250-750 USD
$20-50 USD
$2-8 USD / hour
$10-30 USD
$30-250 USD
$3000-5000 CAD
₹600-1500 INR
€5000-10000 EUR
$250-750 NZD
$3000-5000 USD
min £36 GBP / hour
₹750-1250 INR / hour
$30-250 USD
₹12500-37500 INR
$250-750 USD
$15-25 USD / hour
£250-750 GBP