Telecom Engineer (SMPP / SMS Gateway / Asterisk) – Remote Contract

@iosifpeterfi

I'm Iosif Peterfi, 15+ years delivering secure, reliable telecom operations across live SMS and SIP platforms with a practical, outcomes-driven mindset. This is my speciality Telecommunication gateway operations and security-enabled SMS/SIP platform management, including migration, SLA-driven incident readiness, and resilient connectivity. You're seeking a hands-on Telecom Engineer to run a live SMS and SIP platform, migrate the SMS gateway from Ozeki to Kannel, set up and troubleshoot SMPP connections, create SMPP users and integrations, manage Asterisk users and routing, and resolve delivery and connectivity issues on a remote monthly retainer with incident availability. I'll deliver a clear, outcome-focused plan: execute the Ozeki to Kannel migration with minimal downtime, establish reliable SMPP links and monitoring, configure user access and integrations, optimize Asterisk routing for steady voice and SMS delivery, and implement runbooks and on-call playbooks to shrink incident times. You'll see defined milestones, risk visibility, and concise weekly updates to keep stakeholders informed. Last quarter I helped a regional telecom operator migrate their SMS gateway and stabilize SMPP routes during a live rollout. Delivery delays dropped by 40% and platform uptime reached 99.98%. 3-5 business days. Happy to discuss scope alignment. Let's chat - I can walk you through my approach in 15 minutes.

@tejoel

With over 20 years of experience in the field, I offer an incredible amount of expertise in anything VoIP-related, and particularly with Asterisk systems. I have set up, configured, and managed a wide range of Asterisk systems for various clients throughout my career. To illustrate, two notable projects involved developing call routing configurations that optimized the use of SIP resources and streamlining user management processes for improved efficiency. In addition to being comfortable with Asterisk, I'm very hands-on with SMPP and have managed a variety of SMS gateways like Kannel and Ozeki. Recently, I led the successful migration project from Ozeki to Kannel for a major telecom operator, seamlessly transferring thousands of SMPP connections. My proficiency also extends to managing connectivity issues and troubleshooting delivery challenges promptly.

@kzaouli05

VoiP/Security expert, thanks to contact me for more details about your telephony project. Regards, Kamal Z.

@nolk

Hi there, I'm working as a Solution Architect in telecom platforms vendor delivering SMSC and related solutions, which are deployed to most of the tier1 mobile carriers and will be happy to help you with your tasks. Have 10+ years experience working with SMS (SMPP, MAP, SMSoIP, SMSoD etc.).

@noursherif030

I'm Nour, a versatile and seasoned professional with extensive experience in the realms of software development, cybersecurity, network security, and embedded systems. My skills align closely with each aspect of your Telecom Engineer role from managing SMS gateways to troubleshooting delivery and connectivity errors. Specifically, my work with Python, Java, C#, and JavaScript would greatly benefit your setup by ensuring efficient management of your SMPP connections and Asterisk SIP system. I've *>pitch*> researched the technologies you listed and can certainly deliver on their setup and troubleshooting needs. Moreover, my expertise with Linux and networking is expansive; a valuable asset for you as it means I can set up comfortable-shared trouble network issues quickly. I've worked with similar gateways like Kannel in previous projects which enhances my ability to migrate from Ozeki to Kannel smoothly. In terms of remote work competency signal responsiveness, there's nothing I can't handle. I'm well-versed in remotely resolving challenging incidents and mitigating connectivity errors promptly. To match the 'mandatory details' for the application, I will disclose specific previous projects showing my axe WLAN (SMPP) & gave my exper..

@ayesha86664

Hi there! You need a hands-on Telecom Engineer to manage SMS and SIP platforms, and the real challenge is ensuring smooth SMPP migration and Asterisk operations without disrupting live traffic. I recently migrated an Ozeki SMS gateway to Kannel while maintaining active SMPP connections for multiple clients, and also configured Asterisk users, routing, and SIP trunks to improve call reliability. My work reduced delivery failures and minimized downtime for production systems. I will manage your SMS gateway migration, configure SMPP users and integrations, and handle all Asterisk setup and troubleshooting so your platform stays fully operational and scalable. Check our work: https://www.freelancer.com/u/ayesha86664 Can you confirm the number of active SMPP connections and Asterisk users that need ongoing management? I am ready to start — just say the word. Best Regards, Ayesha

@alluankit01

Hi, I can support a live SMS/SIP platform and I’m comfortable with the kind of work this role needs: production troubleshooting, careful migrations, stable routing, and fast incident response without creating more downtime. The scope is clear—Ozeki to Kannel migration, SMPP connection setup and debugging, SMPP user/integration handling, and Asterisk user/routing/config management—with strong Linux and networking discipline behind it. Relevant experience: • SMPP: [add one real SMPP example] • SMS gateways: [add the gateway(s) you worked with and what you handled] • Asterisk: [add what you configured: trunks, extensions, dialplan, routing, failover, etc.] Preferred monthly retainer: $650 USD I’d be glad to support this long-term and keep communication clear, practical, and responsive during incidents. Best regards. Ankit.

@SnTechnologies59

Hello Sir, I am interested in your project. I have 7+ years of experience in telecom systems, VoIP, and messaging platforms, working with SMPP, SMS gateways, and Asterisk-based SIP systems in live environments. I have hands-on experience with SMPP connections including setup, binding, delivery reports, and troubleshooting real-time issues. I have worked with SMS gateways like Kannel and similar systems, handling configurations, routing, and migrations. On the Asterisk side, I have configured SIP users, dial plans, call routing, and resolved connectivity and call quality issues. I can not only manage and troubleshoot your existing system but also help you set everything up from scratch to a fully working production-ready environment, ensuring stability and smooth operations. I am available for ongoing support with flexible hours, and we can discuss a suitable monthly retainer based on your needs. Please message me so we can proceed. Best regards, SoftNexus Technologies

@abdf2010

Hi there, I've taken a close look at your Telecom Engineer project and I'm confident I can help manage your live SMS and SIP platform. With my strong background in Linux, Asterisk, and VoIP, I'm well-equipped to handle the Ozeki to Kannel migration, set up and troubleshoot SMPP connections, and manage your Asterisk SIP system. I've worked on similar projects in the past, and I'm familiar with the complexities of SMPP connections and Asterisk configurations. To get started, I'd like to discuss your current setup and identify the key areas that need attention, particularly the Ozeki to Kannel migration and any existing SMPP connections. Let's chat about your project and see how I can assist you in ensuring a smooth and reliable SMS and SIP platform - I'd appreciate the opportunity to explore this further with you.

@rogelitoc

Hello, In my opinion, the problem of this project is that efficient management and migration of SMS and SIP systems require seamless integration and robust troubleshooting capabilities. I will design a migration plan from Ozeki to Kannel, ensuring minimal downtime by implementing a phased approach. I will configure and optimize SMPP connections, create users, and establish integrations while leveraging existing Asterisk setups for SIP routing. I will prioritize consistent monitoring and error handling to address connectivity issues effectively. The deliverable will be a fully operational SMS gateway with integrated SMPP connections and a well-configured Asterisk SIP system, along with documentation for ongoing management. I have successfully managed similar projects, ensuring high availability and performance. I can start immediately. Regards.

@novalitztech

Hi, I see that you're looking for a Telecom Engineer to manage your SMS and SIP platform, specifically with experience in SMPP, SMS gateways, and Asterisk. My approach would be to first focus on the migration from Ozeki to Kannel, ensuring a smooth transition while troubleshooting any potential issues that arise. I would also set up and manage SMPP connections and users, while maintaining your Asterisk SIP system to ensure optimal call routing and configuration. I have substantial experience working with SMPP, having set up multiple connections in previous roles that improved delivery rates by over 20%. My background includes managing SMS gateways like Kannel, and I’ve worked extensively with Asterisk, configuring user settings and routing to enhance system performance. Reliability and clear communication are key for remote work, and I’m committed to being responsive for incident responses. Best regards, Novalitz Tech

@khrystynad4

Hello, I am an experienced Telecom Engineer with hands-on expertise in SMPP, SMS gateways, and Asterisk. I have managed live SMS platforms and SIP systems, ensuring reliable delivery and uptime. Experience Highlights: -SMPP: Configured and maintained multiple SMPP connections for high-volume SMS platforms, including user creation, routing, and troubleshooting delivery issues. -SMS Gateways: Extensive experience with Kannel and Ozeki, including migrations, gateway setup, and integration with external systems. -Asterisk: Configured SIP users, call routing, dial plans, and security settings for both small and large-scale deployments. -Linux & Networking: Strong background in server administration, firewalls, VPNs, and troubleshooting connectivity issues in live environments. Monthly Retainer: $1200 USD (flexible based on scope and incident coverage) I am available for incident response, proactive monitoring, and ongoing management of your SMS and SIP platform. I handle all work personally and ensure high reliability for production systems. Best regards, Khrystyna

@mohamedaminea1

As a highly experienced and multidisciplinary engineer, I believe my skill set strongly aligns with your project's requirements. In addition to my 5+ years of structural, electronics, and mechanical engineering experience, I have strong expertise in Linux – a crucial skill for effectively managing the live SMS and SIP platform you require. Moreover, while building on my Linux knowledge, I've developed an excellent understanding of networking over my career. This allows me to not only manage SMS gateways such as Ozeki or Kannel for a smooth migration but also adeptly troubleshoot any issues that may arise with SMPP connections or delivery and connectivity problems. In the past, I've also had ample opportunities to work with Asterisk – a 521th-egrated SIP system manager. With this rich experience, I can comfortably handle tasks like user management, routing configurations, and incident response for you. Coupled with my strong experience with SMPP and understanding of strategic tools such as Kannel or Ozeki, it's safe to say that your project will be in capable hands. My preferred monthly retainer fee is $X000. I'm looking forward to discussing how I can put my skills to work for your project.

@venplura

Hi there! Do you need someone to also handle automated monitoring for SMPP link health or just reactive troubleshooting? Regardless, this is definitely something that I feel confident delivering on, given my past experience. I would love to discuss your project further! Looking forward hearing from you. Kind Regards, Corné

@RobeelHassan

I’ve worked on telecom-style messaging and VoIP systems with strong Linux and networking fundamentals, and I’m comfortable taking ownership of a live SMS/SIP stack. SMPP experience: Handled SMPP integrations for bulk messaging systems—configuring binds (TX/RX/TRX), managing throughput, handling delivery receipts (DLRs), throttling, and debugging connection/session drops and latency issues. SMS gateways: Worked with Kannel-based setups (bearerbox/smsbox configs, routing, failover) and similar gateway architectures—can handle migration from Ozeki → Kannel, tuning performance and stability. Asterisk experience: Configured SIP users, dial plans, routing rules, trunk integrations, and call handling flows. Also handled troubleshooting (registration issues, codec mismatches, NAT/firewall problems). What I’ll bring: • Reliable incident response and root-cause troubleshooting • Clean configs, monitoring, and stability improvements • Proactive optimization of delivery rates and system performance Availability: Flexible with on-call support Monthly retainer: $800 – $1200 (depending on load and SLA) Ready to step in and stabilize/improve your platform.

@sasli

Hi, I have very good experience in telecom domain specially in messaging system and depth knowledge of SMPP/SMSC, SS7 and other protocol which is being used in SMS domain. Have expertise in design and developing SMS gateway and integration of SMS services on kannel, routeSMS, ozeki. I can customize channel or can provide support to develop SMS gateway from scratch including UI which canoe used to user creation, SMS route mapping, Queue management, DLR management, HTTP/SMPP account creation, routing to SMSC/SMS gateway based on SMPP or http connections. Also have good experience in handling Long message format, DLR receiving, ASYNC mode of SMPP binding (High TPUT), and different types of SMS Most of the SMS gateway or SMSC have developed and deployed on Ubuntu Or CentOS. You can assign any sample task on SMPP and test the expertise. Thanks, Sas