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Senior PHP + WebRTC Engineer Needed for Real-Time Voice Workflow Platform We’re looking for a highly experienced PHP/WebRTC developer to help expand a multilingual real-time communication platform used in operational environments. This project focuses on improving voice-driven workflow efficiency for mobile teams through lightweight speech accessibility features layered into an existing Push-to-Talk (PTT) infrastructure. Please read carefully before applying: This is NOT an AI assistant project This is NOT a chatbot or autonomous agent system This is NOT an always-listening voice platform The goal is practical operational usability: voice dictation instead of typing audio playback instead of reading multilingual communication support fast mobile-first interaction Current Stack & Environment PHP backend architecture Existing WebRTC/PTT infrastructure Existing async transcription pipeline Provider abstraction layer already implemented Mobile-first thin-wrapper application architecture We need someone comfortable working inside an established architecture without overengineering or replacing core systems. Scope of Work Phase 1 - Speech-to-Text Accessibility Layer Implement lightweight dictation support across operational text areas including: task notes comments service requests chat inputs operational forms transcript assistance Requirements: tap-to-speak or hold-to-record UX asynchronous processing mobile/tablet optimized editable transcript preview before submission graceful failure handling provider-agnostic implementation Phase 2 - Text-to-Speech Playback Add operational narration support for: instructions agenda items translated content notes/comments operational communications Requirements: one-tap playback pause/stop controls visible playback state multilingual playback compatibility lightweight execution with minimal workflow interruption Important Technical Constraints You MUST: work within existing provider abstraction architecture avoid vendor lock-in maintain async/non-blocking behavior preserve responsiveness of core PTT workflows support mobile wrapper permission handling ensure no tenant data leakage You MUST NOT introduce: conversational AI autonomous workflow logic wake-word systems always-on listening floating assistants employee monitoring/scoring complex voice-command engines Ideal Candidate We’re specifically looking for someone with strong experience in: PHP backend systems WebRTC and real-time communication mobile-first architecture async processing speech/transcription integrations scalable multi-tenant systems operational SaaS products Bonus if you’ve worked on: hospitality systems workforce communication tools multilingual communication platforms accessibility-focused UX Deliverables Successful completion includes: functional speech dictation functional narration playback mobile/tablet validation graceful failure handling provider abstraction compliance non-blocking workflow verification
Project ID: 40468550
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52 freelancers are bidding on average $12 USD/hour for this job

I clearly understand the boundary for this project: you need strictly utilitarian speech-to-text dictation and text-to-speech playback integrated into your existing PHP and WebRTC infrastructure, with zero conversational AI or always-on listening. For Phase 1, I will implement the tap-to-speak dictation across your operational text areas. I will ensure the async transcription routes cleanly through your current provider abstraction layer, handles mobile microphone permissions gracefully within your thin wrapper, and provides an editable preview before submission. For Phase 2, I will build the one-tap playback feature for instructions and notes, ensuring the UI clearly shows the playback state without blocking or interrupting your core Push-to-Talk workflows. I have extensive experience with real-time communication, async data pipelines, and managing mobile-first architectures. I respect established codebases and will strictly adhere to your provider-agnostic constraints to avoid vendor lock-in and prevent any tenant data leakage. You can view my portfolio of robust, real-time applications here: freelancer.com/u/microlent I am ready to review your architecture and get started. Best, Rajesh
$12 USD in 40 days
9.5
9.5

Hi, I have 5+ years of experience in Flutter. I will design and develop a fully functional Flutter mobile application for your business. The app will be cross-platform, responsive, and optimized for both Android and iOS. I will ensure smooth navigation, clean UI, and reliable performance. My Skills Include: a) Flutter Development – Expertise in building cross-platform mobile apps with responsive UI. b) State Management – Experienced in Provider, Riverpod, and Bloc for scalable apps. c) Backend Integration – Skilled in connecting apps with REST APIs, Firebase, and third-party services. d) Database Handling – Proficient in Firebase Firestore, MySQL, and SQLite. e) Deployment & Support – Experienced with publishing apps on Google Play Store and Apple App Store. Please share your ideas or reference apps, and I’ll help bring your vision to life. Lets connect in chat so that We discuss further. With Regards, Sai
$10 USD in 40 days
7.8
7.8

⭐⭐⭐⭐⭐ + 100% Job Score freelancer Hi, thank you for this chance to apply for your project. With strong PHP backend and real-time communication development experience, I can work within your existing WebRTC/PTT architecture to implement lightweight speech accessibility features without disrupting core workflows. My approach focuses on provider-agnostic integration, async processing, and preserving the responsiveness of your established multi-tenant platform. I can implement mobile-optimized speech-to-text dictation, editable transcript previews, non-blocking async processing, and multilingual text-to-speech playback with clean UX controls while maintaining abstraction-layer compliance and avoiding vendor lock-in. I focus on scalable PHP architecture, graceful failure handling, permission-safe mobile workflows, and keeping the system lightweight without introducing conversational AI or unnecessary complexity. Ready to review the current architecture and begin immediately. Vinh
$8 USD in 40 days
6.4
6.4

Hi, I will fix your WooCommerce PayPal checkout so payments complete and orders process correctly. I saw orders stuck in pending with PayPal funds not reaching your account; I’ve fixed WooCommerce gateway issues including API/IPN failures and checkout breakdowns. I will trace the issue in staging across PayPal API, IPN/webhooks or plugin conflicts, fix the root cause, then test sandbox and live until orders, emails and payments work end to end. Which PayPal integration are you using and can you share recent error logs? Best Regards, Fizza Nadeem K
$5 USD in 40 days
5.8
5.8

Hello there,\n\nI hope you are well.\n\nI’m a PHP and WebRTC engineer with deep hands-on experience building multilingual, real-time communication platforms. I focus on practical, mobile-first improvements that respect existing architectures and avoid overengineering. I’ve worked with PHP backends, WebRTC, async processing, and provider-agnostic layers, ensuring low latency and non-blocking workflows in multi-tenant SaaS environments.\n\nIn past projects I’ve implemented lightweight speech-to-text layers and text-to-speech playback within strict integration boundaries, delivering tap-to-speak UX, asynchronous pipelines, editable transcript previews, and robust error handling, without altering core PTT logic. I’ve contributed to accessibility-focused UX with mobile wrappers and graceful fallback strategies, preserving data isolation across tenants.\n\nI can deliver Phase 1 and Phase 2 within your existing provider abstraction, keeping the system responsive and scalable with minimal disruption to current flows. Next steps: align on API contracts, latency targets, and phased milestones. \n\nBest regards,\nBilly Bryan
$20 USD in 15 days
5.1
5.1

Hello, Your focus on enhancing a multilingual real-time communication platform aligns well with my experience in developing scalable solutions. I recognize the importance of integrating dictation support and text-to-speech playback into your existing Push-to-Talk infrastructure, particularly concerning the need for seamless functionality within a PHP backend. One key challenge here is ensuring compliance with your provider abstraction while implementing these features, as it can introduce complexities in data flow and potential points of failure. I have worked on similar projects where I integrated speech-to-text and text-to-speech functionalities, allowing for efficient communication and documentation processes without compromising on data security. My approach would involve early diagnostics of the existing async transcription pipeline to identify integration points and validate the mobile-first architecture to ensure a smooth user experience. - What specific speech accessibility features are you aiming to prioritize in the initial phase? - Are there any particular compliance standards or regulations we should consider during the development process? Regards, Thomas Beigbeder
$2 USD in 7 days
5.0
5.0

With my team at Web Crest, we have a vast skill set that aligns perfectly with the tasks outlined in your project. Having developed numerous mobile and web-based applications using PHP and ensuring top-notch user experience is our specialty. Our knack for innovative solutions with a mobile-first approach could add immense value to your real-time voice workflow platform. Additionally, we possess an extensive understanding of the WebRTC technology and asynchronous processing - all key components required to smoothly integrate dictation support into your operational texts. We're well-versed in creating audio narration assemble for agile task allocation such as instructions, agenda items, translated content, notes/comments, and more to boost your team's overall efficiency.
$5 USD in 40 days
4.8
4.8

Hi, there. I’m experienced with PHP real-time systems, WebRTC workflows, async processing, and mobile-first operational platforms where low latency and workflow continuity are critical. Your architecture direction makes sense — lightweight accessibility enhancement layered into existing PTT infrastructure without introducing conversational AI or intrusive voice systems. I can implement: • Async speech-to-text dictation across operational inputs • Editable transcript preview flows • Provider-agnostic STT/TTS integration inside existing abstraction layer • One-tap multilingual narration playback • Non-blocking queue/job handling • Mobile/tablet optimized permission handling • Graceful failure/retry states • Tenant-isolated processing safeguards My approach: • Preserve existing PHP/WebRTC architecture • Avoid vendor lock-in completely • Maintain responsiveness of core PTT workflows • Use lightweight async services/workers • Focus on operational usability over feature bloat I’ve worked with communication systems, real-time streaming workflows, scalable SaaS backends, and multilingual processing pipelines where stability matters more than flashy AI layers. Can start with Phase 1 immediately and validate mobile behavior early before expanding playback functionality.
$15 USD in 40 days
4.8
4.8

Dear Client, I’m an experienced full-stack developer with over 10 years of experience in web and mobile application development, specializing in building scalable, responsive, and high-performance solutions for diverse business needs. I understand you are looking for a reliable developer to build or improve your project, including web or mobile applications similar to CRM, dashboards, or APIs, and I have worked on similar solutions successfully. My skills in React, Vue, Laravel, PHP, Python, REST APIs, and database design ensure efficient and high-quality delivery. Feel free to share more details or ask questions. I’m ready to refine my approach to match your exact requirements. Looking forward to working with you. Best regards, Md Ruhul Ajom
$5 USD in 40 days
5.7
5.7

Hello, Your project is to extend an existing PHP/WebRTC-based operational communication platform by adding lightweight, non-intrusive speech accessibility featuresspecifically tap-to-dictate input and text-to-speech playback—while preserving the current PTT infrastructure, async architecture, and provider abstraction layer. I can implement these features in a way that integrates cleanly with your existing system, keeps everything non-blocking, and ensures mobile-first usability without introducing any AI-driven or autonomous behavior. A few quick questions: 1. Which transcription providers are currently integrated in your abstraction layer (e.g., Google, Azure, Whisper, custom API)? 2. Do you already have audio permission handling implemented in your mobile wrapper, or should that be extended as part of this work? 3. Should speech-to-text results be stored immediately as final input, or should users always confirm/edit before submission? Best, Fahad Tanvir
$5 USD in 40 days
4.2
4.2

Hi, I’ve worked on real-time communication systems where the hard part isn’t WebRTC itself, it’s keeping async voice flows stable inside an already running operational backend without breaking latency or existing PTT behavior. What transcription provider are you currently abstracting through, and is it already streaming-based or batch async only? I’ve built similar voice-enabled workflows where we had to layer speech-to-text and text-to-speech on top of existing PHP-driven systems with strict constraints around non-blocking behavior, multi-tenant safety, and mobile-first interaction, especially in operational SaaS environments where downtime or lag directly impacts field teams. If I were approaching this, I’d stay strictly inside your provider abstraction layer and treat voice as a lightweight input/output enhancer rather than a new system. For dictation, I’d implement a tap-to-record flow feeding into your existing async pipeline with a clean transcript review step before commit, and for TTS I’d keep playback decoupled from core workflow threads so it never blocks UI or PTT activity. The key is isolating voice as a side channel, not a competing system. Happy to plug into the current architecture and extend it cleanly without disruption. Kind regards, Abel.
$10 USD in 40 days
2.9
2.9

Your biggest challenge isn’t adding speech-to-text or playback features it’s preserving the responsiveness and stability of an existing WebRTC/PTT workflow while introducing asynchronous multilingual voice layers that don’t interfere with operational communication. That architecture layer is where most developers break production systems. It’s also exactly what I do. Here’s what I’ll handle for you 1 Lightweight speech-to-text dictation integrated directly into your existing PHP + WebRTC infrastructure for notes, forms, comments, chat inputs, and operational workflows without blocking core PTT performance 2 Mobile-first tap-to-speak and hold-to-record UX with async processing, transcript preview/editing, graceful failure handling, and provider-agnostic implementation that respects your current abstraction layer 3 Multilingual text-to-speech playback for operational instructions, agenda items, translated content, and internal communications with pause/resume controls and minimal workflow interruption I’d like a quick technical walkthrough of your current provider abstraction structure, transcription pipeline, and WebRTC flow so I can map the cleanest integration path before development starts. Warm Regards Usama F
$5 USD in 40 days
2.6
2.6

⭐⭐⭐⭐⭐ ✅Hello, I’ve worked on real-time PHP/WebRTC communication systems with async audio pipelines and mobile-first operational workflows, so I clearly understand the constraints of integrating speech features without disrupting existing PTT infrastructure or introducing heavy AI dependencies. In previous projects, I’ve extended established real-time communication platforms with speech-to-text and text-to-speech layers, built on provider-agnostic abstraction systems to ensure flexibility across transcription engines. I’ve implemented tap-to-record dictation flows, asynchronous transcription handling, and non-blocking UI updates for mobile SaaS environments where latency and workflow continuity are critical. For this project, I will implement a lightweight speech accessibility layer directly within your existing PHP/WebRTC stack, ensuring full compliance with your abstraction layer and avoiding any architectural disruption. Phase 1 will deliver tap/hold dictation with editable transcript previews and async processing. Phase 2 will introduce clean, one-tap text-to-speech playback with multilingual support, visible playback states, and non-blocking execution. Everything will be built to preserve PTT responsiveness, avoid vendor lock-in, and ensure strict data isolation across tenants. Let’s connect so I can review your current pipeline and integrate these voice accessibility features cleanly into your existing operational system without overengineering.
$8 USD in 40 days
2.4
2.4

Hi, Please write the scope of project in the detail in the chat so that we can agree on the scope. Thanks Amit Ranjan SEO specialist
$3.70 USD in 40 days
2.4
2.4

Hi, I hope you’re doing well. I understand that you need a senior PHP/WebRTC engineer to extend an existing real-time PTT communication platform with lightweight speech accessibility features while preserving the current architecture and operational responsiveness. The goal is to implement efficient speech-to-text dictation and text-to-speech playback workflows that improve multilingual mobile usability without introducing AI-assistant behavior, blocking processes, or vendor lock-in. I’ll work within your existing provider abstraction and async architecture to implement mobile-friendly dictation, editable transcript previews, multilingual narration playback, graceful failure handling, and non-blocking speech workflows. The implementation will remain lightweight, scalable, and aligned with operational SaaS and multi-tenant best practices while preserving the responsiveness of your current WebRTC/PTT infrastructure. Questions: 1. Which speech providers are currently integrated into the provider abstraction layer, if any? 2. Is the existing async transcription pipeline queue-based (Redis/RabbitMQ/SQS/etc.) or handled differently? 3. Are there current mobile wrapper constraints or permission-handling edge cases that already affect microphone/audio workflows? Best regards, Heorhii
$5 USD in 40 days
2.0
2.0

Hi, there. I understand you need a senior PHP/WebRTC engineer who can extend your real-time PTT platform with lightweight speech accessibility features while preserving your existing async architecture, mobile responsiveness, and provider abstraction design. I can deliver: * Implement speech-to-text dictation with tap-to-speak UX, async processing, editable transcript preview, and graceful failure handling. * Add multilingual text-to-speech playback with playback controls and lightweight mobile-friendly execution. * Work directly within your existing PHP backend, WebRTC/PTT workflows, and provider abstraction architecture without overengineering. * Maintain non-blocking performance, tenant isolation, and compatibility with mobile wrapper permission handling. * Focus strictly on operational accessibility workflows without introducing AI assistants or autonomous systems. I have experience working with PHP backend systems, WebRTC communication platforms, async workflows, scalable SaaS architecture, mobile-first applications, and speech/transcription integrations. Best regards, Mark Rimando
$5 USD in 40 days
2.2
2.2

Hey, This WebRTC + PHP voice workflow project caught my attention right away. I specialize in practical speech features for operational teams and totally get that you want simple dictation and playback without any AI chatbot stuff. I can add clean tap-to-speak dictation for notes and forms plus smooth one-tap audio playback, all while respecting your existing architecture and keeping everything fast on mobile. I’ve done similar work on multilingual workforce tools before and know how to keep things lightweight and non-blocking. I can jump in right away and deliver solid results. Happy to discuss your current setup and get started quickly!
$5 USD in 40 days
1.9
1.9

⭕ How does the current provider abstraction pass audio jobs into the async transcription pipeline? ⭕ Are WebRTC/PTT sessions separated per tenant at signaling, media, and storage layers? Success depends on adding dictation and TTS without blocking PTT, leaking tenant data, or changing core voice workflow behavior. Likely bottlenecks are mobile permissions, transcript latency, failed provider retries, playback state conflicts, and WebRTC session timing. I’d first trace capture events, queue jobs, provider calls, tenant guards, logs, and mobile wrapper permissions. The scope is clear and should stay lightweight.
$5 USD in 40 days
1.4
1.4

Hi There , Good evening! I’ve carefully checked your requirements and really interested in this job. I’m a software developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in Web, Mobile app Development with AI integration and I have rich experienced in Mobile App Development, JavaScript, SaaS, SEO Auditing, WebRTC, SEO, Android, PHP and Accessibility. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Looking forward to hearing from you soon
$25 USD in 7 days
0.0
0.0

❤️ Wishing you a wonderful day. ❤️ Harnessing over a decade of experience as a full-stack developer, I have been successful in building responsive and scalable web applications using PHP, JavaScript, React, Node.js, and Angular. I thrive in complex situations and have a strong understanding of WebRTC and real-time communication dynamics essential for your project. In addition to my technical strengths, I have a firm grasp of the business context, making me mindful of your need to avoid overengineering. Working extensively on CRM systems equipped me to appreciate the importance of automation in optimizing workflows - an advantage in maintaining the non-blocking workflow you desire. Having built ETL pipelines and designed dashboards for business intelligence, I bring an analytical perspective to my work, ensuring the end product is actionable and aligned with your objective of increased operational efficiency. On top of these core proficiencies mentioned, my background in mobile application development will prove invaluable as we ensure a mobile-first implementation while maintaining performance across devices. With these interlocking skills complemented by my penchant for clean code practices, I confidently submit that I offer the skill set crucial for developing and enhancing innovative solutions like yours. ❤️ Thank you. ❤️
$50 USD in 30 days
0.0
0.0

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