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We are looking for an experienced **Full-Stack Developer** to complete, fix, and improve partially developed modules in our existing **Zyap OS POS platform**. Our previous developer started these modules but left before completion. Some features are incomplete, some are not working correctly, and some require additional development. Current pending modules include: * **Advertisement Module** * **Website Intelligence Module** * **Display Manager** * **Display Menu / Digital Menu Screen Module** Responsibilities: * Review and understand the existing codebase * Find bugs, errors, and incomplete functionality * Fix frontend, backend, API, and database issues * Complete pending features and modules * Develop missing functionality where required * Connect frontend with backend APIs * Test everything end-to-end * Ensure new changes do not break existing POS functionality **Tech Stack:** Python, FastAPI, PostgreSQL, REST APIs, existing frontend, Git/GitHub. We need someone experienced in **taking over existing projects, debugging another developer’s code, fixing issues, and completing unfinished development**. This can become a **long-term development opportunity** for the right developer.
Project ID: 40720058
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Active 2 days ago
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250 freelancers are bidding on average $139 CAD for this job

Taking over unfinished POS modules is usually less about writing new code and more about safely untangling what is already there without breaking billing, display flows, or API behavior. For Zyap OS, I’d start by auditing the existing FastAPI/PostgreSQL structure, tracing each pending module end to end, then fixing blockers in the frontend/backend/API connections before filling the missing logic. I’ve worked on takeover/debugging cases where a previous developer left partial features behind, including broken integrations, incomplete database handling, and UI pieces that looked done but failed in real usage. That kind of work needs careful regression testing, especially inside a live POS environment where one bad change can affect core operations. A small first-phase review can help turn this into a clean execution plan. - Do you already have a GitHub branch or staging server where the incomplete modules can be reviewed safely? - Which of the 4 modules is the highest priority right now? - Is the frontend built in a framework, or is it mostly existing templated UI tied to the APIs?
$250 CAD in 7 days
9.4
9.4

Hello, As an experienced Full-Stack Developer, I’ve successfully taken over numerous existing projects, debugged previous developer’s code, and fixed issues to completion - making me ideal for your needs. With a track record spanning over 15 years, I have extensive expertise in platforms like Laravel, WordPress, Shopify, and languages such as Python - exactly what is needed for debugging the problem areas in your current Zyap OS POS project. Moreover, my deep familiarity with REST APIs, database management like PostgreSQL as well as having provided AI Automations solutions is particularly relevant. Your project requires someone who not only understands a wide range of technical skills but also has a keen eye for detail and can ensure seamless integration of front-end with back-end APIs. I bring this complete-package skillset to enhance your Advertisements Module, Website Intelligence Module, Display Manager and Display Menu Module. Finally, taking over and fixing unfinished development projects has become one of my many specialities that now span across various sectors including SaaS platforms. I am confident in my ability to effectively review your existing codebase, identify errors and bugs and complete any missing functionality seamlessly. I understand that Time is money for your business, thus delivering error-free work on time whilst ensuring functionalities are optimized & platform remains stable will be given the highest pri Thanks!
$130 CAD in 2 days
8.6
8.6

Hi, I am an experienced Full-Stack Developer with expertise in Python, FastAPI, PostgreSQL, and REST APIs. I will thoroughly review the existing codebase, identify bugs, fix frontend/backend/API/database issues, complete pending features, and ensure seamless integration of the Display Menu modules in the Zyap OS POS platform. Let's discuss further to strategize the project implementation. Regards, Sai Bhaskar
$250 CAD in 6 days
7.8
7.8

Hello, I checked your "Digital Menu Display Module — Zyap OS -- 2" project description, it looks like the focus is on delivering a clean, responsive website that works well across all devices. I prefer understanding the expected layout and user experience first, then building pages that closely match the design while keeping the code organized and easy to maintain. Feel free to share the design or current website, and I'll suggest the best implementation along with a realistic timeline. Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$150 CAD in 5 days
7.5
7.5

Hello, I see that you're looking for a Full-Stack Developer to finish and enhance some unfinished modules on your Zyap OS POS platform. It sounds like you need someone who can dive into existing code, identify issues, and bring the incomplete features to life. With 7+ years of experience in full-stack development, I’ve successfully taken over projects like this before, fixing bugs and enhancing functionality while ensuring everything runs smoothly. I’m confident in working with your tech stack, including Python, FastAPI, and PostgreSQL. My approach would be to thoroughly review the current codebase, pinpoint errors, and develop the missing features while making sure nothing else is broken in the process. One question I have is: What specific features within the Digital Menu Screen Module are you looking to prioritize first? Best regards, Ivan Mandinski
$140 CAD in 2 days
7.7
7.7

A partially built POS module set like this usually hides two problems at once: visible bugs and invisible gaps between the frontend, APIs, and database layer. My first step would be to map those gaps across the Advertisement, Website Intelligence, Display Manager, and Digital Menu modules so fixes are made in the right order and existing POS behavior stays stable. I’ve worked on ongoing systems where another developer’s unfinished code had to be completed instead of replaced, including backend debugging, API corrections, and cleanup of logic that was only half-implemented. That experience helps a lot in projects like yours because the real job is understanding intent from the current code, then finishing it safely. I can also help break the work into practical phases once the code is reviewed. - Which module is closest to completion already, and which one is still mostly missing? - Do you have sample bug reports/videos showing the current failures? - Is automated testing already present, or will this need manual regression testing across the POS flows?
$250 CAD in 7 days
7.7
7.7

Hi, Taking over another developer's half-finished FastAPI code and getting it stable is a big part of what I do. On a LAMP REST API job I inherited and deployed to Azure the client wrote "Adil did a great job, we'd be happy to work again." One thing I'd want to check first: does the existing repo have any tests or a staging environment? For a POS platform the real risk is breaking working modules while fixing the broken ones, so I usually start by reading the code, mapping the API to database flow, and adding a smoke test before touching anything. A display manager and menu screen module is close to a TV channel dashboard we built from Figma designs. ManoTv: front-end channel management dashboard Can you give me read access to the GitHub repo so I can scope the pending modules? I'd start on one module as the first milestone so you only release on working code. Adil
$154 CAD in 7 days
7.5
7.5

The main risk here is not just unfinished modules, but making changes inside an active POS platform without introducing side effects elsewhere. I’d approach this by reviewing the current codebase module by module, identifying what is incomplete versus what is failing, then reconnecting frontend flows, APIs, and database logic in a controlled way with end-to-end checks. I regularly handle inherited projects where the original developer left midstream, so I’m comfortable stepping into unfamiliar code, reading existing patterns, and finishing work without rebuilding everything from scratch. FastAPI, REST endpoints, PostgreSQL logic, and bug-fix completion work like this are exactly the kind of situations where a structured takeover matters more than speed alone. To estimate the first working phase properly, I’d like to pin down a few gaps. - Are there issue notes or a checklist for each module, or would the review need to discover the missing pieces from code/testing? - Is this strictly bug fixing and completion, or are you also expecting UI/UX updates inside the Display Menu screens? - Do you want the work handled directly in your existing repo workflow with commits/PRs?
$250 CAD in 7 days
7.1
7.1

When a project has incomplete modules, bugs, and unfinished features, the real issue often lie in a lack of cohesive understanding of the existing codebase. To address this, I will take a systematic approach to make sure stability and functionality. Safe code review: Thoroughly analyze the existing codebase to identify issues. Targeted debugging: Fix bugs and incomplete functionalities in each module. Feature completion: Develop and implement the pending features as required. End-to-end testing: Conduct full testing to verify all changes and functionality. I will make sure to work in a way that keeps your existing POS functionality intact, avoiding any disruption to your live system. Could you clarify if there are any specific features or functionalities you prioritize for completions first? Rajavel
$169 CAD in 5 days
7.3
7.3

From what I've understood, you need someone to take over an unfinished Zyap OS codebase, understand what the previous developer left behind, and bring the pending modules to a stable working state. I can audit the existing implementation, trace frontend → API → database flows, fix broken logic, complete missing functionality, and test the modules end-to-end without disrupting the existing POS workflows. I’d focus first on the highest-priority Display/Menu functionality, then address the Advertisement, Website Intelligence and Display Manager dependencies where required. A few points to confirm: • Do you have a list of known bugs/incomplete features from the previous developer? • Which module should be treated as the first priority? • Is the current GitHub repository and a staging environment ready for takeover? Please note: The budget and timeline in my bid are placeholders. If you share the repository and current issue list, I can quickly identify what is reusable and what needs correction. Best Regards, Sagar
$180 CAD in 5 days
7.1
7.1

Hello I can step into your existing Zyap OS codebase immediately to audit, fix, and complete the unfinished Advertisement, Intelligence, and Digital Menu Display modules. With extensive full-stack experience optimizing real-time POS platforms, digital signage, and display managers, I will ensure seamless screen synchronization and clean, maintainable architecture across all four components. What tech stack is Zyap OS built on, and do you have a priority list of the specific bugs left behind by the previous developer? Best regards, Giáp Văn Hưng
$30 CAD in 7 days
6.9
6.9

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum
$250 CAD in 1 day
6.8
6.8

With over a decade of professional experience in development, I can confidently handle the complex task of debugging and completing partially developed modules. Having worked extensively with both PHP and Python, alongside REST APIs, I am well-equipped to understand your existing codebase in Zyap OS POS platform. My expertise in frontend and backend development, including API integration, will enable me to effectively fix any issues that arise and ensure the complete functionality of your advertisement module, website intelligence module, display manager as well as digital menu screen module. Assuring to test everything end-to-end and employ Git/GitHub for smooth collaboration throughout the project. My track record illustrates my ability to develop custom solutions tailored to specific needs. Rather than adopting a one-size-fits-all approach, I prefer strategizing unique solutions for each project that not only solve the present problems but also form the foundation for scalable applications in the future. Building on this approach, I am confident I can bring lasting value to your Zyap OS POS platform by ensuring each new feature or change doesn't disrupt existing functionalities
$250 CAD in 7 days
6.8
6.8

Hi there, I see that you need support in enhancing your existing Zyap OS POS platform, specifically with the incomplete modules including the Display Menu and Advertisement Module. With my experience in debugging, completing unfinished developments, and ensuring seamless integration, I can efficiently fix the frontend, backend, and API issues you’re encountering. I'm proficient in Python and FastAPI, as well as PostgreSQL and REST API, making me well-suited to handle the required tasks while ensuring that new updates do not disrupt the existing functionality. I can start immediately and would love to discuss the details to recommend the most effective approach to move forward. Regards, Ali
$30 CAD in 1 day
6.4
6.4

Hi, I'm Denis, a full-stack developer specializing in taking over incomplete projects and getting them back on track. I understand your Zyap OS situation—four modules need attention (Advertisement, Website Intelligence, Display Manager, Digital Menu Screen), and the challenge is understanding previous architectural decisions while fixing bugs, completing features, and keeping existing POS functionality intact. I've handled similar handoffs involving legacy code audits, API tracing, database schema issues, and reconnecting fragmented frontend-backend flows. My approach is methodical code review paired with systematic testing. Here's my process: First, I'll review the codebase and database structure to identify what's built, what's missing, and what's broken. I'll create a detailed breakdown of priorities, then work through each module systematically—fixing bugs, completing features, ensuring proper API connections, and running end-to-end tests to verify nothing breaks in the POS system. I'll prioritize database consistency early. Schema documentation gaps or undocumented changes often cascade into problems across modules, so I'll address this upfront to prevent data-related issues. The main risk is unclear requirements around module functionality. I'll flag this during initial review so we're aligned before building. I'm ready to start immediately. Let's discuss the details. Thanks, Denis.
$30 CAD in 3 days
6.5
6.5

Hi there, I have read and understood the project details. I can take over the existing Zyap OS POS codebase, understand what is already implemented, identify the incomplete areas, and finish the pending modules without disrupting the working POS features. I’ll first review the Python/FastAPI backend, PostgreSQL database, REST APIs, frontend integration, and existing Git history to understand the current architecture and identify bugs or unfinished flows. I can then work through the Advertisement, Website Intelligence, Display Manager, and Digital Menu modules, fixing frontend/backend/API issues, completing missing functionality, handling database changes, and testing each workflow end-to-end. I’ll use structured Git commits and regression testing so existing POS functionality remains stable. Could you share the repository and documentation showing which features are currently incomplete or failing? Cheers, Rabia Shaikh
$350 CAD in 3 days
6.7
6.7

Hi, You need a developer to finish and stabilize the Zyap OS POS modules across Python, FastAPI, PostgreSQL, REST APIs, and the existing frontend. For your project, our team will: • review the current codebase and trace the broken paths in the advertisement, website intelligence, display manager, and digital menu screens • fix backend logic, FastAPI endpoints, PostgreSQL queries, and API integration issues without disturbing existing POS flows • connect unfinished frontend screens to the correct REST APIs and clean up data handling across modules • debug incomplete features left by the previous developer and complete the missing functionality where needed • test the full flow end to end in Git/GitHub-friendly branches so changes stay controlled We handle takeover work in Python and Node.js environments, with strong focus on API Development, FastAPI, and database-backed platforms that need careful debugging and feature completion. The work on Zyap OS fits the kind of system repair and extension we commonly handle. I'd be happy to discuss the details and answer any questions before we get started. Looking forward to working with you. Best regards, Mubeen Web Crest
$100 CAD in 3 days
6.6
6.6

Hi There, I have thoroughly analyzed the requirements for the Digital Menu Display Module project on Zyap OS. I understand the urgency to complete, fix, and enhance the partially developed modules, such as the Advertisement Module, Website Intelligence Module, Display Manager, and Display Menu/Digital Menu Screen Module. Let's chat and discuss it further. To handle your project, I will start with reviewing the existing codebase to identify bugs, errors, and incomplete functionality. I will then proceed to fix frontend, backend, API, and database issues, complete pending features, and develop missing functionality using Python, FastAPI, PostgreSQL, REST APIs, and Git/GitHub. The clear deliverables for this project include a fully functional and integrated Digital Menu Display Module on the Zyap OS platform. Before signing-off my bid, I would like to ask a question, i.e., how critical is the timeline for completing these modules? Cheers, Aneesa.
$100 CAD in 1 day
6.4
6.4

As a professional web developer with over six years of experience, I am no stranger to taking over existing projects and the task of fixing or completing unfinished developments. My extensive proficiency in Node.js, PHP, and Python along with their frameworks like NestJs, Laravel, and FastAPI will prove to be instrumental in resolving the discrepancies in the partially developed modules you have described. Moreover, my expertise with frontend technologies—ReactJs, NextJs, and Angular—ensures seamless integration between frontend and backend APIs. Such competency is crucial for your project as you require consolidation between Zyap OS's existing frontend with your backend functionality. Securing functionalities through proper authorization is also a crucial quality that I possess as your project demands. I vehemently believe in building reliable, long-lasting relationships with my clients. Hence, my commitment to service does not end with just fixing the current issues but extends to providing continual support in case further developments are needed down the road. In addition to the necessary technicalities we share like Python and backend systems like Git/ GitHub I am known for optimally hosting a variety of platforms including AWS and Digital Ocean which will be useful in deploying your product post-completion. Let me be your solution for reliable completion of your pending modules for a swift return to business accuracy!
$30 CAD in 1 day
6.4
6.4

Hi, I can take over the existing Zyap OS POS codebase, audit the current architecture, trace incomplete or broken functionality, and systematically complete the Advertisement, Website Intelligence, Display Manager, and Digital Menu modules. I’ll work across FastAPI, PostgreSQL, REST APIs, and the existing frontend, with regression testing to ensure the core POS remains stable. 1. What frontend framework and build structure is currently used with the FastAPI backend? 2. Are the pending modules documented with expected behavior, or should I derive requirements from the existing code and UI? 3. Is there a staging environment with representative PostgreSQL data where I can safely reproduce and test the current issues? Regards, Houssame
$30 CAD in 1 day
6.6
6.6

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