VoIP and GSM Systems Engineer

Come build something true with us.
We’re True Sea Moss, a fast-growing wellness brand built on the healing powers of one of nature’s oldest superfoods: sea moss.
No powdered promises. No pretty lies. Just clean, potent nourishment pulled from the wild and delivered to the people who need it most.
Learn more about our products: https://trueseamoss.com/
 

As we grow, we’re expanding our technical infrastructure and are looking for a VoIP & GSM Systems Engineer — a specialist who can help us build a reliable communication system for secure SMS and voice verification in the U.S.
This role is ideal for someone who loves working at the intersection of telecom, hardware, and software — someone who understands how to make systems talk, connect, and run seamlessly.

What You’ll Be Doing

• Design and deploy a virtual PBX system using physical SIM cards.
• Build and configure IP-PBX environments (Asterisk, FreePBX, 3CX, or FreeSWITCH).
• Integrate GSM gateways via SIP/IAX2 protocols.
• Connect and manage SIM cards from U.S. operators (Verizon, AT&T, T-Mobile, US Cellular).
• Configure call and SMS routing for OTP, bank verification, and two-factor authentication.
• Test and ensure stable reception of bank SMS and calls.
• Optimize signal quality (antennas, frequency bands, gateway positioning).
• Document configurations and integration steps clearly and concisely.

What You Bring

• Proven hands-on experience with GSM gateways (e.g., GoIP, Dinstar, Hybertone, DBLtek, etc.).
• Solid understanding of IP telephony, PBX configuration, and SIP trunking.
• Experience integrating PBX with web applications or internal systems.
• Familiarity with telecom standards and U.S. frequency bands (GSM 850/900/1800/1900 MHz, LTE Bands B2, B4, B12).
• Knowledge of relevant codecs (G.711, G.722, G.729A, GSM).
• Strong troubleshooting, documentation, and communication skills.

Nice-to-Haves

• Experience optimizing hardware setups (antennas, amplifiers, modems).
• Familiarity with telecom security and anti-fraud measures.
• Understanding of carrier-specific routing and SMS delivery in the U.S.
• Basic scripting or automation skills for system monitoring.

Why Work With Us
We’re building something with depth and direction. No shortcuts. No hype cycles. You’ll be part of a team that actually listens, tests, learns, and evolves — and you’ll have a major say in how our systems scale securely and reliably.

Here’s How We Back Our Words with Care

• Welcome pack and custom True Sea Moss merch to start strong
• Sports reimbursement to support your mental and physical well-being
• Additional vacation days beyond standard holidays
• Coaching & career development sessions to fuel your growth
• Corporate English lessons to sharpen communication
• WHOOP membership to support your health and recovery
• Coworking membership for flexibility and focus
• Sabbatical options after long-term contributions
• Travel and project grants to support personal growth and creativity

So — if you’re ready to engineer reliable connections and help True Sea Moss grow its secure communication ecosystem, we’d love to meet you.