Budget: 3500 UAH Deadline: 7 days
Good day!
I have reviewed the description — the project looks quite serious, especially considering that the PBX is already deployed and has been tested with real calls.
I can assist with code review and further technical audit: I will look at the architecture of the NestJS backend, interaction with Asterisk AMI, WebRTC functionality, Socket.IO, as well as the overall stability of the system under load. I will pay special attention to bottlenecks — asynchronous processes, queues, call event handling, possible race conditions, and scalability.
After the review, I will be able to provide specific recommendations on what should be optimized or redesigned, and if needed, I can get involved in further development and support of the project as a freelance specialist.
We can discuss the details.
Budget: 3500 UAH Deadline: 1 day
Hello! I am ready to take on your project and will complete it urgently. I have extensive experience with similar tasks, so there will be no difficulties. If I have piqued your interest, feel free to write; I am happy to collaborate!
Budget: 3500 UAH Deadline: 7 days
Hello, I worked on the development of a CRM system for telephony with Asterisk and WebRTC integration - the project helped process over 500 calls a day and automated call center workflows.
Is there a plan to integrate with external CRM systems or APIs to expand the functionality of the PBX?
I suggest we get in touch; I will provide you with free technical consultation and we can create a development plan + I will tell you about my team!
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- Rating 516
Budget: 3500 UAH Deadline: 7 days
Hello, lrp energy team!
For a quality code review and refinement of your ATS platform, please clarify:
1. Are there any main functional requirements that should be checked first?
2. Is there documentation or technical specifications that could assist in the analysis?
3. Which specific aspects need to be checked: security, performance, scalability?
4. Are there certain parts of the code that should be given special attention?
My approach to work:
1. I conduct a deep analysis of the code with a focus on identifying weaknesses and potential improvements.
2. I provide recommendations for optimization, security, and scalability, considering the commercial nature of the project.
3. I collaborate with you to implement necessary changes, ensuring the stability and efficiency of the platform.
4. I offer long-term support and development of the project to meet all business requirements.
Please send the details in private messages so I can better understand the specifics of your platform and propose concrete solutions.
Budget: 3500 UAH Deadline: 3 days
Hello. I have worked with telephony and can consult you. The technology stack is relevant, so feel free to reach out - I would be happy to help!
Budget: 3500 UAH Deadline: 2 days
Good day. I can take on the first stage - a technical review of the ATS before the commercial launch.
For the task, I see not just a code review, but an examination of the areas where such systems usually break down - WebRTC, Asterisk AMI, Socket.IO, reconnections, call states, logging, Prisma/PostgreSQL, deployment, security, and behavior under load.
I would like to clarify 2 points.
> Is there access to the repository, logs, and a brief description of the current deployment?
> At this stage, do you only need an audit with a list of risks, or should I also include small fixes within the budget?
Similar examples of our work.
> https://business.ingello.com/tts - voice and AI processes, close to communication tasks.
> https://business.ingello.com/fractal - automation and complex process logic.
> https://business.ingello.com/platforma - an example of a complex business platform with an architectural approach.
The main profile of Ingello for FLH - https://systems-fl.ingello.com/ua
For 3500 UAH, I would conduct a preliminary audit in 2 days - a brief technical report, a list of critical weak points, priorities for fixes, and an assessment of the next stage. If during the review there is a small obvious fix that can be safely made within this scope, I will do it. Further support is better assessed after the audit, so as not to guess from the coffee grounds =/--
Budget: 5000 UAH Deadline: 1 day
Welcome!
The Devoxen team has experience in auditing and refining web platforms, including CRM/ATS systems, backend architecture, and complex business logic.
We can assist with:
- code review and identifying problem areas;
- architecture, performance, and security analysis;
- enhancing ATS platform functionality;
- refactoring and stabilizing code;
- fixing bugs and optimization;
- preparing technical recommendations for further project development.
We work carefully with others' code: first, we analyze the current state of the system, after which we propose a refinement plan without "rewriting everything from scratch."
We are ready to join the project, familiarize ourselves with the codebase, and quickly get to work. After completion, we provide a guarantee and support.
Budget: 6000 UAH Deadline: 2 days
Good day
My name is Dmytro. I work with NestJS, Next.js, WebRTC, Socket.IO, PostgreSQL, and realtime/backend systems. I also have experience with VoIP, automation, and AI solutions.
I can conduct a full review of your PBX:
— check the architecture
— identify weak points
— assess load and scalability
— check security
— optimize WebRTC/Asterisk interaction
— improve stability and realtime components
I can also assist with ongoing support and development of the project on a regular basis.
The approach through Claude for the MVP is absolutely fine, but before the commercial launch, it is indeed important to conduct a technical audit and "polish" the system.
I am ready to get acquainted with the project in more detail 👍
Budget: 4500 UAH Deadline: 1 day
Hello!
I am a Full-Stack Software Engineer with over 7 years of experience in developing websites, SaaS solutions, complex web platforms, and MVPs for startups - from idea and architecture to production and support.
I work not only as a developer but also with a focus on business logic, scalability, and long-term support of solutions. My portfolio includes examples of implemented projects of varying complexity.
Technology stack:
PHP (Laravel, Symfony, Yii2),
Frontend: JavaScript (Vue.js, React.js), HTML5, CSS3,
Databases: MySQL, PostgreSQL.
Regarding timelines and costs - at this stage, it is difficult to accurately assess them without clarifying the requirements. To form a reasoned estimate, it is usually necessary to understand:
– the goals of the project;
– key functionality;
– expected load and integrations;
– priorities (quick launch vs scalability).
I suggest starting with a brief clarification of the requirements or a call / correspondence - after that, I will be able to provide a realistic estimate on timelines, budget, and implementation options.
I would be happy to discuss the details.
Budget: 3500 UAH Deadline: 4 days
Hello, Ihor!
I am happy to help you conduct a professional audit and refine the ATS platform. It's great that Claude has put together a working framework, but for a commercial product (especially in conjunction with telephony), a live code review of the architecture is critically important.
I am fully proficient in your stack: NestJS (TypeScript), Next.js 14, Prisma, PostgreSQL, Socket.IO, and Asterisk AMI / WebRTC. I have a good understanding of the specifics of AI code—where it usually "hallucinates," where it creates unnecessary abstractions, or writes suboptimal database queries.
Since the most challenging aspect of telephony is the stability of the connection and the processing of real-time events, I suggest breaking the work into two logical steps:
Stage 1: Full technical audit (Code review). Within 2–3 days, I will thoroughly study the repository, check the stability of socket connections, the logic of NestJS interaction with Asterisk AMI, the operation of WebRTC, and the optimization of Prisma queries. Based on this, I will provide a clear report with identified weaknesses and bugs.
Stage 2: Corrections and refinements. Together with you, we will approve an action plan and gradually bring the system to a stable commercial-ready state.
The budget and timeline I indicated in my bid are approximate (just for the initial deep audit of the system). Since you are open to discussing payment in private, I suggest we communicate, take a look at the code, and we will definitely agree on the final cost and format of long-term project support.
I look forward to collaborating!
Budget: 3500 UAH Deadline: 1 day
Hello! I am a full-stack developer working with both backend and frontend. Therefore, I can help with this task.
Budget: 3500 UAH Deadline: 1 day
Good day. I am developing on nest.js, we can call to discuss the details. I have experience with PBX. It is necessary to evaluate the backend. Unfortunately, I do not work with next.js.
Budget: 3500 UAH Deadline: 1 day
Good day! I have reviewed the project description and stack. I have good experience in fullstack development and working with real-time systems, so I can conduct a comprehensive technical review of the PBX, identify weaknesses, and suggest more stable and scalable solutions for commercial launch.
I am particularly interested in your stack, as I work with:
• NestJS / TypeScript
• Next.js
• PostgreSQL / Prisma
• Socket.IO / WebSocket
• WebRTC and backend architecture of real-time services
I will be able to:
• check the architecture and load
• assess the security and stability of calls
• identify bottlenecks in Asterisk / WebRTC integration
• improve the performance and maintainability of the code
• assist with further development and support of the project
About myself:
• 5 years of freelance development
• working as a Fullstack Developer at Traffic One and also worked in a California startup on an AI project
• commercial experience with production projects and high-load logic
• experience in both frontend and backend development
Kostyantin Y.
Winning proposal- Projects 5
- Rating 5.0
- Rating 601
Budget: 3500 UAH Deadline: 7 days
Hello!
Very interesting stack and good approach, especially if the ATS has already passed real tests and works in production scenarios.
I have experience working with realtime systems, WebRTC, NestJS/Next.js architecture, Socket.IO, and high-load/backend projects. I can join specifically as a person for technical review and production-hardening.
What I can do for the project:
— audit of backend/frontend architecture
— review of Asterisk / AMI / WebRTC integration
— analysis of realtime part stability
— checking for memory leaks / reconnect logic / race conditions
— audit of Socket.IO events and state synchronization
— review of Prisma/PostgreSQL structure
— security of auth/session/call events
— analysis of load and scaling bottlenecks
— Docker / deployment / observability review
— fault tolerance / auto recovery / logging
— review of call lifecycle and edge cases
Especially important for commercial ATS:
— reconnect handling
— dropped calls
— websocket resilience
— SIP/WebRTC edge cases
— observability and call tracing
— rate limiting / abuse protection
— worker separation for call-processing
— queue/event architecture
I can also help:
— bring the system to production-ready level
— prepare a development roadmap
— participate in long-term support and development
To start, it would be desirable:
— access to the repository
— brief description of the architecture
— call flow diagram
— list of issues/doubtful places that have already been noticed
After the review, I will be able to provide a specific list of weaknesses, risks, and recommendations for improvement.
Budget: 3500 UAH Deadline: 1 day
Hello. I have been working with Node.js for over 9 years. I am ready to collaborate! Feel free to contact me.
Budget: 3500 UAH Deadline: 1 day
Hello, I have experience in creating products using generative models.
They often write too much code, which can conflict in non-obvious ways.
It is necessary to review your database, the logic of how the application works, review the architecture, and write tests for the server.
I am ready to help you with this, break the work into stages, and develop a commercial solution that can be scaled for sales.
Budget: 3500 UAH Deadline: 1 day
Hello! Very interesting project. The fact that the ATS is built using Claude and is already successfully making calls in production is a great start for the MVP.
However, from my experience with refactoring AI code, I can say for sure: neural networks generate a decent base, but almost always ignore proper architectural patterns, edge case handling, and load optimization. For a commercial product, especially where WebRTC, Socket.IO, and Asterisk AMI are actively used, this is critical. Most often, such projects encounter issues with socket disconnections, memory leaks, or event loss from AMI during scaling.
Your stack (NestJS, Next.js 14, Prisma, Socket.IO) is my main development profile. I am ready to conduct a deep expert review of the entire platform.
Here’s what I will focus on during the review:
• NestJS Architecture: AI often "glues" all business logic directly into controllers or gateways. I will check the code cleanliness and the correctness of the separation into modules/services.
• Connection Stability: An audit of how WebRTC and Socket.IO disconnections are handled, and whether reconnection mechanisms are implemented without state loss.
• Database Optimization: I will check Prisma queries (especially for the N+1 problem) and the efficiency of transactions under high load.
• Asterisk AMI: The reliability of event listeners and their correct broadcasting to the frontend.
I am focused on long-term collaboration, so after the review and targeted refactoring of weak points, I would be happy to take the project for ongoing support and development.
My projects with complex custom backend logic:
• my-fitness-club.com — a comprehensive platform with complex user logic, recurring subscriptions, and a powerful admin panel.
• artmastermops.net.ua — a custom-built system with a full-fledged admin panel and management of internal business processes.
Message me privately. I would be glad to look at the repository, give a preliminary assessment, and start working!
Budget: 3500 UAH Deadline: 2 days
I am a NextJs, React, NestJs developer. I am ready to take on this task.
Budget: 3500 UAH Deadline: 1 day
Good day. I have experience working with VoIP/WebRTC solutions, Asterisk, NestJS, and real-time systems. I can conduct a full technical review of the PBX: check the architecture, security, stability of the WebRTC/Asterisk integration, the operation of Socket.IO, load, reconnect logic, call handling, race conditions, and potential issues in production.
I can also assess the quality of the code, the Prisma/PostgreSQL part, deployment, and scalability of the system, point out weaknesses, and suggest more stable solutions where needed. If necessary, I can assist with refactoring or enhancements.
Budget: 3500 UAH Deadline: 3 days
Hello! Your project looks very promising. I am ready to start working and complete it at the highest level.
Proposals concealed
Proposals are currently absent
Budget: 6000 UAH Deadline: 4 days
Hello! ATS on Claude — interesting, I've seen that.
The problem is that everything is always fine in tests. Real issues come up later: AMI disconnects without reconnecting, sockets get lost, Prisma crashes the database under load. These are not guesses — this is what consistently occurs in such projects.
I will go through the entire stack, showing what and why needs to be redone, not just a list of comments.
4 days, 6,000 UAH for the audit with a report. Additional work — separately based on the volume. 3,500 for a commercial product — that's a risk, you understand.
Write to me.
Current freelance projects in the category Databases & SQL
Hello There is a small department where patients are admitted. It is necessary to develop a simple "database" where consumables, medications, and others can be entered, along with incoming and outgoing records, as well as assigning usage to a specific patient. Required functionality Directories Medications Consumables (manual entry option) Patients (ability to continuously add new ones and delete those who have been discharged) Employees (ability to modify)Movement Accounting A single table (movement log) where everything is registered Incoming and write-off Manual correction option When writing off, the nurse must select: date; patient; medication or material; quantity; her full name. The system automatically reduces the balance. When receiving, the head nurse must be able to enter: Delivery date; Medication/material; Remaining quantity; Source; Expiration dateAutomatic Functionality automatic balance calculation; minimum stock control; expiration date control; low stock warnings; protection against writing off more than is available; drop-down lists; data entry validation; conditional formatting.Reports It is necessary to implement automatic reports: current balances; usage over a period; usage by patient; usage by employee; history of movement of a specific medication.Preferred implementation on Google Sheets; We will fill in the databases ourselves. A template for work is needed. I don't know how much this costs, so let's start with $50, and you can suggest your options, preferably with experience.
C# / .NET WPF Developer – Completion of Migration of a Large Invoicing Program RAFSOFT.NET Sp. z o.o. is looking for a C# / .NET developer to complete the rewriting of a large, long-standing invoicing program to a new technology. The project involves the migration of an extensive desktop application for companies, used for invoicing, handling sales documents, contractors, records, and accounting-tax functions. The new version of the program is being created in C# / .NET, using DevExpress components. The project is already about 70% rewritten. We are looking for someone who can help bring it to completion, organize the missing elements, perform tests, and ensure the new version operates in accordance with the existing program. Scope of Work: completion of the migration of a large desktop application to C# / .NET, recreation of the functionality of the old program in the new version, maintaining as identical logic of operation, appearance, and handling as possible, working with DevExpress components, analyzing existing code and comparing the operation of the old and new versions of the program, fixing bugs, completing missing functions, and testing the application, collaborating on the final preparation of the program for deployment. Requirements: very good knowledge of C# and .NET, experience in creating desktop applications for Windows, knowledge of WPF or WinForms, experience with DevExpress or similar UI component libraries, ability to analyze a large existing project, accuracy and patience in reproducing existing functionality, ability to test one's own changes, very good ability to use AI tools supporting programming, code analysis, refactoring, and testing. Preferred: experience with legacy projects, knowledge of or previous work with Visual Basic 6.0, experience in migrating applications from older technologies to C# / .NET, knowledge of issues related to invoicing, accounting, JPK, or KSeF, experience working with large business applications. Who We Are Looking For: We are looking for a self-sufficient, precise, and technically experienced person who can enter an existing project, understand its logic, and consistently bring it to completion. In this project, it is very important not only to write new code but also to faithfully reproduce the operation of the old program — both in terms of functionality and appearance as well as handling. We also require proficiency in using AI tools in daily programming work. We are looking for someone who can use AI practically: for code analysis, bug finding, speeding up migration, creating tests, and organizing the project. About the Company: RAFSOFT.NET Sp. z o.o. is a Polish company creating software for entrepreneurs, accounting offices, and small and medium-sized enterprises. Our main product is the VAT Invoice program, supporting the daily handling of invoices, sales documents, contractors, records, and settlements in accordance with Polish regulations. We develop our own desktop applications and tools related to invoicing, accounting, KSeF, JPK, and automation of business processes. Our solutions are designed with stability, ease of use, and practical application in users' daily work in mind. Company website: www.rafsoft.net
It is necessary to calculate statistics in a medical project (including correlations). Additionally, there is a request to create a mathematical model for predicting the development of pathologies based on available data.
Hello, I need your help in implementing a task. Fix the bugs on the website page, the page displays a 404 error.
Project Meta Implement Viber integration without using third-party CRM systems. All work with messages should be done directly in our internal CRM based on BAS / 1C 8.3.Current System BAS / 1C 8.3 Custom configuration "Customer Service" Database of over 40,000 subscribersRequired Implementation Integration through an official Viber Business provider (TurboSMS, GMS Worldwide, or another agreed service). The button "Write to Viber" in the subscriber card. Sending messages directly from BAS. Receiving incoming messages via Webhook. Automatic linking of messages to the subscriber by phone number. Complete preservation of correspondence history in the subscriber card. Displaying the time, message status, and the manager who responded. Simultaneous work of multiple managers. Message templates for quick responses. Assistance with setting up the Viber provider, API keys, and Webhook. Transfer of all source code and settings after the work is completed.Acceptance Conditions The work is considered completed after successful testing of all functions on the working database and transfer of the source code.Guarantee 1 month warranty for fixing bugs related to the implemented functionality. Further modifications are carried out by separate agreement.Result After the project is completed, managers should be able to fully work with Viber directly in BAS: write to clients, receive responses, view correspondence history, and communicate without using third-party CRMs. All source code, modifications, API keys, and settings will be transferred to the client after the project is completed.