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TITLE Full-Stack Developer – AI-Powered Career Tools Web App (Node/Postgres, OTP Auth, Admin Panel) DESCRIPTION I need a developer to build the backend, database, authentication, and admin layer for a career-tools web app. The front end (20-25 static HTML pages, fully designed) already exists and is not part of this job, it will be extended, not rebuilt. This posting covers the functional scope only; full written requirements and a private repo are shared with shortlisted candidates before final quote. THREE CORE TOOLS (all AI-powered, all require login) 1. Document Reviewer — user uploads a Document (Word .doc/.docx only), backend extracts text, sends it to an AI provider, returns a written report to the user's dashboard and by email. 2. Profile Reviewer — user uploads a PDF export (not a link, not the LinkedIn API), same flow as above, name on the PDF must be checked against the account holder (fuzzy match, not exact). 3. Document Tailoring Tool — user uploads one or two Documents plus a Requirement description, AI generates tailored content, backend must convert this into a properly formatted, branded Word document (.docx) for download, not raw text. This tool is rate-limited to one free use per user per month and requires mobile OTP verification before first use. ACCOUNTS AND VERIFICATION - Email/password registration plus Google, Microsoft, and Apple social login, with account linking if the same verified email is used across both methods. - Email verification required before any tool can be used. - SMS OTP required for tool 3 only, one number per account, with abuse/rate-limit protection (OTP requests must be capped per phone number per hour/day to prevent SMS toll fraud). - Disposable email domains blocked at signup. - Duplicate/fake account detection (same-IP flagging for review, not auto-ban). ADMIN PANEL (screen-based UI, not database access) - View, search, and filter all users and their submitted documents, linked by user ID. - Export user and submission data (CSV or similar). - Allow/reject/ban accounts, two roles only (user, admin). - Manually reset a user's monthly quota on tool 3. - View an audit log of logins, uploads, AI requests, and admin actions. BACKEND, SECURITY, AND DATA - All AI provider API calls happen server-side only, key never exposed to the browser. - Personal data (name, email, phone, address) must be stripped from any content before it is sent to the AI provider. - Malware scanning on every upload before it touches storage or gets processed. - File size and format limits enforced, corrupted/password-protected files rejected with a clear message. - Defined, working data retention and deletion rules (not just documented, actually enforced). - Every AI prompt used by the three tools must be stored in the database with version history, editable without a code deployment. - Standard relational database (PostgreSQL or MySQL), not a proprietary or locked-in format, must be exportable/migratable at any time. - Clear status and error handling for every step (upload, scan, AI call, file generation, email) — no silent failures. WHAT I NEED FROM YOUR BID - A fixed-price quote broken into clear milestones (not just one lump sum). - A realistic timeline in working days/weeks. - Your proposed stack (backend language/framework, hosting, database, file storage, OTP provider) and brief reasoning. - Confirmation you can deliver full source code ownership, all credentials, and basic documentation on completion. - Please do not use AI tools to generate your bid response, I want to understand your own hands-on approach and reasoning. Full detailed requirements document and technical Q&A are shared privately with shortlisted bidders before final commitment.
Project ID: 40579588
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157 freelancers are bidding on average $4,839 HKD for this job

Hi — Elias here from Miami. I see you're looking to develop an AI-driven web app focused on career tools. The goal here seems to be creating a platform that effectively integrates AI functionalities while ensuring a seamless user experience. What usually matters most is the integration of AI with a robust backend. A common issue in systems like this is managing data effectively while ensuring scalability for growth. The tricky part is usually maintaining the system as features expand, especially with user authentication and admin workflows. To tackle this, I would structure the application using Node.js for the backend, leveraging PostgreSQL for reliable data management. I’d prioritize building a flexible API to support future integrations and enhancements. This setup ensures stability and prepares the system for expansion. I've worked on similar projects, particularly in developing AI-powered applications that require intricate data management and user role permissions. A few questions to better understand the scope: Q1 – What specific user roles do you envision for the admin panel? Q2 – Are there particular AI functionalities you have in mind? Q3 – What are your scaling expectations as the user base grows? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$5,000 HKD in 17 days
8.2
8.2

Your brief is clear and technically serious, which I appreciate. I can handle the backend architecture for these 3 tools, including OTP-gated usage for the tailoring flow, social auth/linking, admin panel, audit logs, AI prompt versioning, and secure document processing. I would propose Node.js with PostgreSQL, server-side AI calls, queued processing for uploads/reports, and structured retention rules so the system stays maintainable. Full source code, credentials, and basic documentation can be handed over on completion.
$3,000 HKD in 7 days
7.9
7.9

Hello there, I will deliver the backend, auth layer, and admin panel for your three AI career tools, wiring everything into your existing 20-25 static HTML pages. The Document Tailoring Tool will output a properly formatted, branded .docx (not raw text), with monthly rate limiting and SMS OTP gating baked in. On a similar Node/Postgres project, keeping AI prompts version controlled in the database let the client iterate on output quality weekly without any redeployment. Questions: 1) For the PII stripping step, do you have a defined list of fields to redact, or should I propose a detection approach (regex plus entity recognition)? 2) Do you have a preferred SMS OTP provider (Twilio, Vonage), or is that open? Share the repo access and requirements doc and I will return a milestone breakdown within 48 hours. Looking forward to your response. Best regards, Kamran
$2,282 HKD in 13 days
7.5
7.5

Hi, I'm excited to propose for the Full-Stack Developer role for your AI-Powered Career Tools Web App. With over a decade of experience, I can deliver a robust solution that meets all your requirements. Key Features 1. Backend and Database: Built using Node.js with Express for efficient server-side logic. PostgreSQL will be used as the database to ensure flexible and scalable data storage. 2. Authentication: Email/password registration plus social login options (Google, Microsoft, Apple) with account linking for convenience. 3. Document Reviewer: Server-side AI integration via an API call, ensuring no sensitive keys are exposed in the browser. 4. Profile Reviewer: Similar to Document Reviewer but includes a fuzzy match for names on uploaded PDFs against user accounts. 5. Document Tailoring Tool: Generates tailored content based on AI, with rate limits and OTP verification for enhanced security. 6. Admin Panel: Screen-based UI for managing users, their documents, exporting data, and other administrative tasks. Account Verification - Email verification required before any tool can be used. - SMS OTP is needed only for Document Tailoring Tool, with abuse protection measures in place. - Disposable email domains are blocked at sign-up to prevent fake accounts. Admin Panel Features - View, search, and filter all users and their documents. - Export user and submission data (CSV format). - Allow/reject/ban accounts based on roles. - Manually reset monthly quotas for Document Tailoring Tool. - Detailed audit logs for easy tracking of actions. Backend Security and Data Handling - AI provider API calls occur server-side to maintain security. - Personal data is stripped before sending to the AI provider. - Malware scanning on all uploads. - Enforced file size and format limits with clear error messages. - Defined, working data retention and deletion policies. - Every AI prompt used by tools will be stored in the database with version history. Milestones 1. Initial Setup and Planning: 2 days 2. Backend Development (Tools and Database): 8 days 3. Authentication System Implementation: 4 days 4. Document Reviewer Tool: 5 days 5. Profile Reviewer Tool: 5 days 6. Document Tailoring Tool: 10 days 7. Admin Panel Development: 5 days 8. Testing and Quality Assurance: 7 days Stack Proposed - Backend: Node.js with Express, PostgreSQL for database. - Hosting: AWS or DigitalOcean for scalability. - File Storage: Amazon S3 for secure storage. - OTP Provider: Twilio for reliable SMS service. Ownership Confirmation I will ensure that full source code ownership is transferred upon completion. All credentials and basic documentation will be provided to facilitate ongoing maintenance. Please review the proposal, and feel free to contact me if you have any questions or require further details. Thank you for considering my bid! Best regards, Reed
$4,050 HKD in 40 days
6.5
6.5

Hello!, I am a US-based senior software engineer(frontend, backend, ecommerce, etc) and I read your AI-driven career tools web app description carefully. I understand you need a solid full-stack build with Node.js, PostgreSQL, OTP auth, admin panel, AI chatbot/model integration, and a clean data-driven foundation that’s actually maintainable. I’ve spent about 15 years building production apps with Node.js, PostgreSQL, API development, and AI integrations, so I’m comfortable taking this from architecture to launch. My approach would be: 1. clarify the exact workflow and user journeys 2. design the DB, auth, and admin structure first 3. build the AI features around the product goal 4. test, harden, and deploy with security and performance in mind I do pay close attention to the details, because that’s usually what separates a usable product from something that just “works.” Relevant work includes career and SaaS tools similar to: - a resume review dashboard - an AI interview prep assistant - a candidate matching portal - an internal hiring admin system Could you please clarify the following questions to help me better understand the project? 1. What are the exact career tools you want in v1, and which AI actions are core? 2. Should OTP login be email, SMS, or both, and do you already have a provider? 3.
$4,200 HKD in 4 days
6.5
6.5

Hi there, We’ve built several AI-driven web apps, including a document-reviewing tool that uses Google’s NLP API to extract and analyze text from uploaded documents. We also developed a Chrome extension that allows users to upload documents directly from LinkedIn, which could be a valuable addition to your product. With our extensive experience in both front-end and back-end development, we can seamlessly integrate with your existing HTML/CSS and deliver a fully functional, production-ready solution. Let’s schedule a quick introductory call to discuss your project in more detail and ensure I fully understand your requirements. I’m looking forward to hearing more about this exciting project. Best, Adil
$2,688.89 HKD in 21 days
6.7
6.7

Hi, This is a backend-focused build, and I’d prioritize the high-risk areas: account linking, OTP abuse prevention, secure file handling, and traceable AI processing without exposing keys. I’d keep the front end as a fixed shell and build a reliable server-side flow for login, upload, scan, AI processing, DOCX generation, email delivery, and audit logging. My first step would be designing the data model and workflow: users, linked identities, submissions, prompt versions, quotas, audit events, and retention/deletion rules. Then I’d implement authentication, server-side AI calls, malware scanning before storage, fuzzy name checks for the PDF flow, and the monthly free-use limit for tool 3 with SMS OTP protection. I can deliver this in clear milestones: auth/account linking, core tool processing, admin panel, and hardening/testing. A stack like Node.js with PostgreSQL, object storage, and a reliable OTP/SMS provider is a strong fit for portability, maintainability, and clean handoff. Full source ownership, credentials handover, and basic documentation are included.
$2,007 HKD in 18 days
6.3
6.3

The tricky part here isn't the AI integration itself—it's making sure uploads move through scanning, text extraction, PII removal, AI processing, document generation, and email delivery without leaving users stuck in an unknown state if one step fails. I'd build this around a Node.js backend with PostgreSQL, keeping AI calls server-side and storing prompt versions in the database so they can be updated without deployments. For the Word output, I'd generate a properly formatted `.docx` rather than wrapping plain text into a file, so branding and layout stay consistent. Account linking, OTP limits, disposable email blocking, and same-IP review flags all belong in the authentication layer instead of being bolted on later. One thing I'd want to confirm is your preferred SMS OTP provider, since that affects the implementation details and hosting. Once I review the private requirements, I'll break the work into fixed milestones with a realistic timeline and hand over the full source code, credentials, and documentation at completion.
$4,000 HKD in 7 days
6.0
6.0

I am a Full-Stack Developer offering to build the backend, database, authentication, and admin features for an AI-Powered Career Tools Web App using Node/Postgres and OTP Auth. The solution will include features like Document Reviewer, Profile Reviewer, and Document Tailoring Tool. Security measures will include email and SMS OTP verification, block on disposable email domains, and abuse protection. The admin panel will have user management, data export, and audit log capabilities. I propose using Node.js/Express, PostgreSQL, JWT, AWS, and Twilio. I guarantee fixed-price milestones, a realistic timeline, complete ownership, and detailed documentation. Let's discuss creating a reliable, scalable, and secure solution for your project.
$5,400 HKD in 5 days
6.2
6.2

Hi, I'd handle this using a modular Node.js backend with PostgreSQL, separating core upload handling from AI processing. The biggest improvement will come from enforcing strict data sanitization before any AI API call and locking down OTP abuse with rate limits at the database level. I worked on a similar tool where PDF content needed name matching against user profiles, and fuzzy matching caught 80% of mismatches while avoiding false positives. Changes will be small and reversible, with full backups taken before any structural updates. Every upload, AI prompt, and admin action will be logged so nothing is untraceable. This keeps the system auditable while reducing support overhead from bad data or locked accounts. If we’re aligned, I’d review the current setup and suggest the safest path forward. Thanks, Denis.
$4,000 HKD in 30 days
6.2
6.2

Hi I understand you are looking for an AI-driven career tools web app that leverages Node.js, PostgreSQL, API integrations, and an AI chatbot, with robust data management and model integration to deliver practical, scalable career tools. I’m a results-driven AI and web developer who designs and delivers production-ready tools by turning platform features into repeatable workflows. My approach focuses on concrete outcomes, structured delivery, and clear next steps, so you can move from concept to a working system efficiently. For your project I would structure the work into well-defined phases: 1) requirements capture and system architecture, 2) data modeling and API design for core features (career insights, job matching, resume guidance, chatbot interactions), 3) backend development with AI model integration and robust data management, 4) integration and testing of the AI chatbot with real-world prompts, 5) final polish, testing, and delivery of a ready-to-run setup with documentation and a handoff plan. The result is a clear action plan, working setup, and a reusable framework for future features. I can also provide supporting materials such as data model diagrams, API reference templates, and a concise deployment checklist to help you scale and maintain the app after delivery. Best, Justin
$4,000 HKD in 7 days
6.6
6.6

Hi, Mateo here from Toronto. The scope covers three AI file-processing tools, four auth methods with account linking, OTP with fraud protection, malware scanning on every upload, prompt versioning, and a full admin panel with audit logging. Thats an 80-90 hour build, the posted budget range is significantly below the actual cost for this scope, so I'm quoting the real figure. Stack: Node.js/Express, PostgreSQL, Twilio for OTP, ClamAV or a cloud scanning API for malware, OpenAI for all AI calls (server-side only, named-entity PII stripping before any content reaches the API), AWS S3 or R2 for file storage. Branded .docx output on Tool 3 via docxtemplater with a real template, not raw text conversion. Milestones: M1 auth system (email + Google/Microsoft/Apple, account linking, OTP, abuse protection), M2 three AI tools + file I/O (.docx extract, PDF parse, branded .docx output), M3 admin panel + audit log + quota controls, M4 security hardening + data retention enforcement, M5 testing and documentation. Total: ~65 hours at $50 USD/hr = ~HKD 33000. Full source code ownership and all credentials on completion.
$25,000 HKD in 30 days
5.9
5.9

Hello, I can help with your "AI-Driven Career Tools Web App Development" project. I develop clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving node.js, postgresql, database development, web development, backend development, api development, data management, ai chatbot development, ai model integration, ai development, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. I provide clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "it was great working with him, did whatever changes i asked him as per my need." Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$4,800 HKD in 12 days
6.0
6.0

Hello, we pride ourselves on being a dynamic and cutting-edge technology company with over a decade's worth of experience, much of which has been spent innovating with AI and emerging technologies, overlaps seamlessly with the requirements of your project. As we've done in the past, our team can help you breathe life into your already crafted frontend while building the robust backend architecture that meets all your functional needs. Leveraging the expertise in API and Database Development, alongside our proficiencies in Node.js, PostgreSQL and MySQL among others is specifically relevant to your project. Our practical approach involves securing user data while providing fast retrieval using standard relational databases. Addressing redundancy or fake account issues is something we've previously confronted and overcome so we are fully equipped to meet this challenge competently. Let's discuss strategies together to build a remarkable product. Thank You Rohan
$5,600 HKD in 45 days
5.8
5.8

Hi, I can build the complete backend and admin layer for your AI-powered career platform using a secure, scalable architecture with Node.js, PostgreSQL, REST APIs, OTP authentication, AI integrations, malware scanning, and a robust admin panel. I'll deliver clean, well-documented source code, milestone-based development, full ownership, and ensure the solution is production-ready, secure, and easy to maintain. Why work with me? ★ Proven track record: 75 successful projects with 5-star reviews ★ Expertise in Node.js, Angular, React, Express, Python, Django, Flask, PHP, WordPress, Laravel, Codeigniter and more ★ Responsive, deadline-focused, and committed to results ★ 3 months of free post-launch support I'd be happy to discuss the detailed requirements and provide a realistic timeline and fixed-price breakdown. Best regards, Samar H.
$3,000 HKD in 30 days
5.6
5.6

Hi, I have experience building secure full stack web applications with Node.js PostgreSQL authentication systems and AI integrations. I can develop the backend admin panel document processing pipeline OTP verification and API integrations while keeping security and scalability as the top priority. I would structure the project into clear milestones covering authentication and database core AI tools admin panel and final testing with documentation. You'll receive complete source code ownership credentials and deployment documentation at handover. I'm available to start immediately and would be happy to review the detailed requirements before providing a final fixed price and timeline.
$5,500 HKD in 10 days
5.6
5.6

Hey, the requirement for AI prompt versioning that's editable without a code deployment is a smart move for future-proofing. I'd set that up with a dedicated database table and an admin UI, making it easy to manage and test prompt changes. The real challenge often lies in ensuring the PII stripping is robust and doesn't accidentally remove context needed by the AI. Are you thinking of a specific library for the .docx generation, or is that open for discussion?
$4,000 HKD in 27 days
5.4
5.4

⭐⭐⭐⭐⭐ Full-Stack Developer for AI-Powered Career Tools Web App ❇️ Hi My Friend, I hope you are doing well. I reviewed your project needs and see you are looking for a Full-Stack Developer for your career tools web app. Look no further; Zohaib is here to help you! My team has successfully completed over 50 similar projects, focusing on backend development and user authentication. I will build the backend, database, and admin panel while ensuring smooth integration with your existing front end. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in full-stack development, focusing on Node.js, PostgreSQL, and secure authentication methods. My expertise includes backend development, API integration, and user management. Additionally, I have a strong grip on security protocols, ensuring your application is safe and efficient. ➡️ Let's have a quick chat to discuss your project in detail. I can show you samples of my previous work and how I can deliver the best results for your needs. Looking forward to chatting with you! ➡️ Skills & Experience: ✅ Node.js Development ✅ PostgreSQL Database ✅ API Integration ✅ User Authentication ✅ Admin Panel Creation ✅ Document Processing ✅ OTP Verification ✅ Error Handling ✅ Data Security ✅ Frontend Integration ✅ Agile Methodologies ✅ Project Management Waiting for your response! Best Regards, Zohaib
$2,800 HKD in 2 days
5.8
5.8

With a profound expertise in full-stack web development, particularly using PHP, Node.js, Vue.js, and C#, I bring the skills and knowledge necessary to deliver on all facets of your AI-powered career-tools web app. I understand that this project entails building the backend, database, authentication, and administering layer - an area where my capabilities truly shine. One core aspect of this job involves developing three AI-powered tools that demand users to upload files for processing. Not only am I well-versed in implementing such functionality, but I also possess proven experience in handling sensitive user data with utmost care and observing data retention policies. Moreover, I have experience integrating important security measures like malware scanning on file uploads – adding an extra layer of safety for platform users. My commitment to quality and a meticulous approach will ensure every step of your app's functionalities is delivered flawlessly - from account and verification systems including social login capability to an admin panel to monitor accounts and user submissions. Let me take care of delivering this project on time, adhering strictly to the project specifications
$5,000 HKD in 4 days
5.1
5.1

Hello! I'll build the full backend, PostgreSQL schema, OTP authentication, social login (Google, Microsoft, Apple), and admin panel for your AI-powered career tools app using Node.js, integrating all three AI document tools with server-side API calls, malware scanning on uploads, fuzzy name matching on PDF submissions, branded .docx generation, SMS OTP rate limiting, disposable email blocking, prompt versioning in the database, and a complete audit log with CSV export. Looking forward to hearing from you.
$5,500 HKD in 30 days
5.3
5.3

Hong Kong, Hong Kong
Member since Jul 5, 2026
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