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I need an experienced developer to build a complete Node.js REST API system from scratch that implements GSM and WCDMA telecommunications protocol functionality. You will work with comprehensive protocol documentation to build a production-ready system. What I Will Provide You - Complete protocol documentation (GSM/WCDMA specifications) - Packet format specifications and message type definitions - Device communication requirements (UDP ports, protocol structures) - API endpoint specifications for frontend integration - Protocol examples and sample packet data - Someone to handle device communication (provides JSON format to your APIs) What You Need To Build = 1. Protocol Implementation > PRIORITY Implement GSM protocol (encoding/decoding, message types, validation) Implement WCDMA protocol (packet format, parameter handling, events) Create binary packet manipulation utilities (byte conversion, checksums) Build protocol validation and error handling Handle multiple message types and protocol variations 2. UDP Transport Layer Multi-port UDP server (port 5557 for GSM, 9000 for WCDMA) Packet routing based on protocol type and port Device discovery and registration system Message acknowledgment and response handling Connection timeout and retry logic 3. REST API Development Complete GSM API endpoints for device control Complete WCDMA API endpoints for parameter management Device management APIs (discovery, status, monitoring) Real-time event system for protocol message handling Comprehensive error handling and input validation 4. Event & Monitoring System Protocol event processing (heartbeat, data reports, status updates) Device status tracking (connected/disconnected, last seen) Event history storage and retrieval Real-time event broadcasting for frontend integration Technical Requirements Must Have Skills: - Node.js & TypeScript (advanced level) - Binary protocol implementation (hex, byte manipulation, packet parsing) - UDP/Socket programming with multi-port handling - Protocol documentation analysis (ability to implement from specifications) - [login to view URL] REST API development - Telecommunications protocol experience or strong learning ability Strongly Preferred: - Telecommunications protocols (GSM, WCDMA, 3G knowledge) - Binary serialization and network protocol implementation - Real-time systems development - Event-driven architectures - Protocol testing and validation experience Budget ~ $500 Must be ready in a few days
Project ID: 40211402
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56 freelancers are bidding on average $437 USD for this job

Hi there, I’ve reviewed your GSM/WCDMA project and I’m confident I can deliver a production-ready Node.js REST API system from scratch that covers encoding/decoding, UDP transport, and real-time event handling. I bring strong Node.js with TypeScript experience, binary protocol work, and multi-port UDP server design. I will implement GSM and WCDMA handling, binary packet utilities, protocol validation, and robust error handling. The architecture will include a multi-port UDP server (5557 GSM, 9000 WCDMA), a discovery/registration flow, an event-driven REST API layer for device management, and a real-time event bus for frontend use. I’ll provide clear API specs, thorough tests, and an incremental delivery plan with milestones. Brief understanding and approach: You want a complete, production-ready system that reads GSM/WCDMA protocol docs, builds encoding/decoding, manages UDP communications, and exposes REST APIs plus real-time events. I’ll implement portable parsers for binary packets, ensure strict validation, and design resilient message routing. I’ll also set up device registration, heartbeat tracking, and a scalable event store. The result will be a clean codebase with solid tests and clear deployment steps. Technical questions I should ask you: How many concurrent devices do you expect to support, and what are peak message rates? Do you have any existing test packets or capture data we should reproduce? What are the exact UDP port expectations and any firewall constrai
$750 USD in 22 days
8.8
8.8

Hi, there, I specialize in developing advanced Node.js systems and have extensive experience in telecommunications protocol implementation. With my expertise in Node.js, TypeScript, and telecommunications protocols, I am well-equipped to tackle the complexities of GSM and WCDMA protocol development. ✅ Implementing GSM & WCDMA Protocols I will meticulously implement the GSM and WCDMA protocols by focusing on encoding/decoding, message types, parameter handling, and event management. By creating binary packet manipulation utilities and robust validation mechanisms, I will ensure a flawless protocol implementation. ✅ Establishing UDP Transport Layer Developing a multi-port UDP server, routing packets based on protocol type, and implementing a device discovery system are key priorities. Additionally, I will integrate message acknowledgment handling, connection timeout logic, and reliable retry mechanisms for seamless device communication. ✅ Crafting REST APIs I will design comprehensive REST APIs for controlling devices, managing parameters, and monitoring the system's status. The APIs will include device management functionalities, real-time event processing, and robust error handling mechanisms to ensure smooth communication. ✅ Implementing Event & Monitoring System Creating an efficient event processing system, real-time event broadcasting, and event history storage will be crucial aspects of the project. I will also track device statuses, manage device connections, and im
$500 USD in 5 days
6.2
6.2

Hi, I am very excited about the opportunity to build a Node.js REST API system that integrates GSM and WCDMA functionalities. With extensive experience in Node.js and telecommunications protocols, I am confident in my ability to implement the required features from your detailed specifications. My approach will include prioritizing protocol implementation of GSM and WCDMA by focusing on encoding, decoding, and validation processes. I am proficient in handling binary protocols and UDP programming, which will be crucial for creating a multi-port UDP server, ensuring smooth message routing, and maintaining device communication. Additionally, I will develop comprehensive REST API endpoints for device control and status management, ensuring real-time processing and robust error handling. My commitment is to deliver a production-ready system within your specified timeline. What is your preferred method of communication for updates? Thanks,
$400 USD in 3 days
5.3
5.3

Hello, I’m excited about the opportunity to contribute to your project. With advanced Node.js + TypeScript experience implementing binary network protocols over UDP (byte/hex parsing, packet framing, checksums, validation) and exposing them cleanly through Express REST APIs, I can build a production-ready core that decodes/encodes your GSM and WCDMA message types, routes traffic across the two UDP ports, and publishes a reliable event + device-status layer for the frontend. I’ll tailor the implementation to your provided specs and sample packets, keeping the codebase clean, well-structured, and testable, with robust error handling and clear logging so you can debug protocol edge cases quickly as devices scale. You can expect clear communication, fast turnaround, and a stable, maintainable API system that fits your existing device-JSON handoff workflow. Best regards, Juan
$500 USD in 1 day
4.6
4.6

Hi there, I am an experienced Node.js and TypeScript developer with strong expertise in binary protocol implementation, UDP/socket programming, and REST API development. I can build a complete GSM and WCDMA system from scratch, following your provided specifications. I have experience with byte-level packet manipulation, checksums, message encoding/decoding, and protocol validation, ensuring robust error handling and real-time event processing. I will implement multi-port UDP servers, handle device discovery/registration, manage message acknowledgment, and build comprehensive GSM/WCDMA API endpoints for device control, parameter management, and monitoring. The system will include real-time event broadcasting, device status tracking, and event history storage for seamless frontend integration. With strong analytical skills, I can accurately implement protocols from documentation and sample packets. I am confident in delivering a production-ready, event-driven, and fully validated system within your timeline. Looking forward to collaborating and bringing your telecommunications platform to life efficiently.
$300 USD in 5 days
1.4
1.4

Hi, I’d be happy to contribute. I have experience in Visual Basic, C# Programming, C Programming, Telecommunications Engineering and Telecoms Engineering. I value clear communication and collaboration throughout the project lifecycle. Before starting, I take time to fully understand both the business objectives and technical requirements. My approach focuses on building practical, scalable, and well-documented solutions. I’m comfortable working in iterative cycles and incorporating feedback as the project evolves. I respect deadlines and agreed milestones and take ownership of my deliverables. I can adapt easily to your preferred tools, tech stack, and workflow. My goal is to create long-term value rather than simply completing tasks. I’d welcome the opportunity to discuss your project and next steps. Best regards, Marko O.
$250 USD in 3 days
0.0
0.0

Hello there , Good afternoon! I’ve carefully checked your requirements and really interested in this job. I’m full stack 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 React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Telecoms Engineering, Telecommunications Engineering, Visual Basic, C Programming and C# Programming. 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.. If you have any questions, please let me know
$250 USD in 3 days
0.0
0.0

Hi Dear. I will take this project very seriously. With extensive experience in Telecommunications Engineering, Visual Basic, C# Programming, Telecoms Engineering and C Programming, I understand exactly what you want and am confident that I can handle this project perfectly. I guarantee my clients the highest quality, accurate schedules, and strong problem-solving skills. I look forward to holding hands and creating a wonderful journey. Let's connect! Cheers!
$555 USD in 5 days
0.0
0.0

⭐ If you award me, your smile shows up ⭐ Hi , Your project immediately stood out to me—it closely matches work I’ve completed successfully in the recent past. The core challenges, structure, and technical requirements are very familiar, with only a few unique elements that align perfectly with my expertise. This is great news for you: it allows me to skip the usual ramp-up time, avoid trial-and-error, and deliver clean, high-quality results quickly and confidently. I bring hands-on experience with Visual Basic, Telecommunications Engineering, Telecoms Engineering, C# Programming and C Programming, along with proven workflows and best practices refined through multiple similar projects. You can view a directly relevant example in my portfolio here: https://www.freelancer.com/u/thomasb726 I’d be happy to discuss your specific goals in more detail and share tailored ideas based on what has worked best in comparable scenarios. Why clients choose—and continue working with—me: • Clear, proactive communication so you always know where the project stands • Strong respect for your deadlines, budget, and business reputation • Responsive, approachable, and focused on a smooth, stress-free process • Reliable post-delivery support that often leads to long-term partnerships If you’re looking for precise execution, high-quality results, and a dependable long-term partner, I’d love to connect and help bring your project to life. Best regards, Tom
$500 USD in 2 days
0.0
0.0

Hello, As an experienced full-stack engineer with a deep understanding of AI and machine learning, I am confident that I possess the skills necessary to take your project from concept to completion. While my core skills may not directly include Node.js, I have successfully delivered high-performance and scalable applications using a multitude of platforms which will translate exceptionally well to your project needs. My expertise in backend development includes Python, which has significant similarities with Node.js, especially in terms of data handling as well as UDP and socket programming. Additionally, my ability to understand complex protocols and convert them into functional code is exemplified by my work in AI and machine learning, where I implement complex algorithms from specific research papers effectively. This strength will be essential in building a Node.js REST API system that adheres strictly to GSM/WCDMA telecommunications protocol specifications. Aside from technically aligning with your project, choosing me guarantees timely delivery, excellent communication, a strong problem-solving work ethic, and most importantly, the flexibility to integrate seamlessly into your team to yield fruitful results. With a disciplined approach towards clean and scalable coding practices, rest assured the fruits of our collaboration will flourish in both the short and long term. Thanks!
$250 USD in 4 days
0.0
0.0

Hello ! I have reviewed Low Level GSM / WCMDA Engineer to convert binary code to Node.js details and believe my skills in C Programming, C# Programming, Telecoms Engineering, Visual Basic and Telecommunications Engineering are a great match. I am an expert in what your project requires. I am in the process of bidding to help you with your project. With 8 years of practical experience, I can confidently say that I can successfully complete your project. I am always happy to answer any specific requests. Best regards, Moh
$500 USD in 3 days
0.0
0.0

Sure, no prob. I can dive into building a complete Node.js REST API system from scratch with GSM and WCDMA protocols. I'll handle protocol implementation, UDP transport layer, REST API development, and event monitoring. Want to discuss the protocol implementation details further? Once we align, I'll start mapping out the system architecture. Let's make it happen!
$620 USD in 3 days
0.0
0.0

Hello, I am excited about the opportunity to build a robust Node.js REST API system implementing GSM and WCDMA protocols from scratch. With advanced experience in Node.js, TypeScript, and telecommunications protocols, I can ensure a seamless encoding/decoding process, along with efficient error handling and validation mechanisms for multi-message types. My expertise in UDP/sockets programming and real-time event processing will guarantee a production-ready system tailored to your specifications. I will leverage the provided documentation to implement the required functionalities efficiently and within a few days. Let’s discuss how I can best tailor this project to meet your needs. What specific device communication requirements do you have in mind for the project? Best regards, Muskan
$250 USD in 2 days
0.0
0.0

Hello, I would like to grab this opportunity and will work until you are 100% satisfied with my work. I am an experienced professional with many years of hands-on experience in C Programming, Visual Basic, C# Programming, Telecommunications Engineering, Telecoms Engineering Let’s connect in chat so that we can discuss further. Regards, Rajesh Rolen
$500 USD in 7 days
0.0
0.0

Hi Eu, ⭐️⭐️⭐️I'll do my best.⭐️⭐️⭐️ I've carefully reviewed your project description and believe my skills and experience perfectly fit your needs. I have over 10 years of experience in the C Programming, Visual Basic, C# Programming, Telecommunications Engineering, Telecoms Engineering field and am highly skilled at delivering high-quality results. Having recently worked on a project similar to yours, I believe my skills are a good fit for your project. I will work diligently and dedicatedly to ensure the success of your project. Please contact us via chat for a more detailed consultation. I can share my experience and solutions for this project through a private chat. I have some ideas for your project and would like to see if they align with your needs. Thank You Roman
$300 USD in 7 days
0.0
0.0

⭐⭐⭐ Absolutely. 300% Confident. No problem Hi, Eu. ☕ Let's talk over a cup of coffee. ☕ I have 6+ years of experience in Node.js and TypeScript, with a strong background in telecommunications protocol implementation. I have worked on similar projects involving binary protocol manipulation, UDP/Socket programming, and REST API development. My expertise includes analyzing protocol documentation and translating it into functional systems. ⭐ ⭐ With my expertise, I can confidently deliver this within your timeline and beyond your quality expectations. All the Best, ~Isaiah
$500 USD in 7 days
0.0
0.0

THIS IS A HANDWRITTEN AND PERSONALIZED BID MESSAGE, NOT AI-GENERATED. I've carefully read your requirements for building a Node.js REST API system handling GSM and WCDMA protocols, including all layers from binary packet manipulation through to the RESTful endpoints and device/event management. My hands-on experience with TypeScript, binary protocols, and telecommunications systems—especially GSM and WCDMA makes me an excellent fit for your project. I'll implement the protocol encoding/decoding and handle UDP transport, followed by structured REST APIs and an event system for complete device monitoring, ensuring reliability and accuracy as outlined in your specs. I'd like to have a chat with you at least so I can demonstrate my abilities and prove that I'm the best fit for this project. Warm regards, Natan.
$500 USD in 2 days
0.0
0.0

Hello Eu, I'm Dax Manning, a seasoned developer with over 8 years of experience in C Programming. I have a strong background in low-level programming and protocol implementation, making me well-equipped for your Node.js GSM/WCDMA project. I have carefully reviewed your project requirements and am confident in my ability to deliver a robust Node.js REST API system that adheres to GSM and WCDMA telecommunications protocols. I will focus on implementing the protocols, building a UDP transport layer, developing REST API endpoints, and creating an event and monitoring system. Let's discuss your project further in the chat to ensure that I fully understand your needs and provide a tailored solution. Thanks, Dax Manning
$500 USD in 7 days
0.0
0.0

Hello, I’ve read your requirements and can build a production-ready REST API to implement GSM and WCDMA protocol behavior from your specs. I bring deep experience designing secure, structured APIs in ASP.NET Core/C#, and I apply the same clean-architecture, strong typing and testing habits to Node.js/TypeScript projects. I will implement binary packet parsing and utilities (hex/byte conversion, checksums), protocol validation and error handling, UDP multi-port transport (5557/9000) with routing, device discovery/registration, acknowledgements, timeouts and retry logic. I’ll deliver robust REST endpoints for device control and parameter management, a real-time event system, and event history/monitoring tailored to your packet samples and API specs. Next step: I’ll review your protocol docs and sample packets and provide an integration plan within 48 hours. Do you have sample packet captures or prioritized message flows (e.g., registration, heartbeat, data report) for initial testing? Best regards, Cindy Viorina
$250 USD in 16 days
0.0
0.0

Hi there, Thank you for the opportunity to submit this bid for your project. I’m genuinely interested and excited about what you’re building, and I can see real potential for it to create value for your users as well as for your business. From what I understand so far, the goals are clear, realistic, and aligned with the kind of work I enjoy doing—solving concrete problems, making things easier for people, and delivering something that looks professional and feels effortless to use. I bring a mix of technical skill, structured planning, and practical communication. That means you can expect clear milestones, transparent pricing, and straightforward updates rather than jargon. My goal is to make the process feel organized and predictable for you, while still leaving room to improve details as we learn more during the project. If we move forward, I’ll focus on making the experience smooth for you: clear expectations, no surprises, and a result that matches what we agreed at the outset. Regards, George M.
$250 USD in 10 days
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