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Staff Software Engineer

Mad Devs -
Remote

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Job details

Benefits

Paid training
Flexible schedule

Qualifications

Go
Kubernetes
Mentoring junior staff
Disaster recovery
English
VoIP
Terraform
Mentoring
Telecommunication
AI
Terraform provisioning
Lua

Full job description

We are looking for a Staff Software Engineer to set the technical direction for our telecommunications platform. You will own the architecture behind how calls enter, move through, and leave our system: SIP signaling at the edge (Kamailio / OpenSIPS), media and call control (FreeSWITCH, Asterisk, RTPengine), the Python services that connect voice infrastructure to our AI inference pipeline, and the underlying carrier-facing integrations.

#LI-DNI

VoIPLead PythonBackend developmentSenior

What you will do:

Own end-to-end telecom architecture: SIP edge (Kamailio/OpenSIPS), media & call control (FreeSWITCH), Python services bridging voice to AI, carrier integrations.
Scale platform to 10,000+ concurrent calls with tight latency SLOs.
Design HA/disaster recovery: anycast SIP, active/active media, geographic failover.
Set engineering standards for the telecom team (testing, load testing, code review, on-call).
Mentor senior/mid engineers, raise the technical bar.
Define voice-quality observability & SLOs (MOS, jitter, packet loss, latency).
Lead carrier strategy: SIP trunk vendors, redundancy, LCR, STIR/SHAKEN.
Partner with AI/product to keep latency budgets honest.

Requirements:

8+ years of engineering, 4+ years in telecom/VoIP in production.
Technical leadership: design docs, mentoring, cross-team decisions.
Deep production experience with FreeSWITCH + Kamailio OR OpenSIPS (custom modules, routing scripts, at scale).
Strong SIP/RTP/SRTP/SDP/ICE; debug via pcap and SIP trace.
Operated a voice platform at 1,000+ concurrent calls (knows the difference to 10k).
Strong Python; can work in Lua/Go/C as needed.
Production integration with PSTN/SIP trunk providers (Twilio, Telnyx, etc.), DID management, LCR.
Hands-on HA/failover for real-time systems.
Production Kubernetes (GKE/EKS) and Terraform.
Language proficiency: English at B2–C1, Russian at B2.
Location: any, except Russia and Belarus.

Additional experience we value:

Working with large-scale WebRTC systems (ICE, TURN, media servers).
Working with RTPengine, Jitsi, or mediasoup.
Building low-latency AI voice pipelines (streaming ASR/TTS, barge-in).
Implementing STIR/SHAKEN and robocall mitigation.
Handling voice compliance requirements, including SOC 2, HIPAA, GDPR, and PCI.
Designing multi-region active/active voice architectures.
Hiring and growing telecom teams.

Why join us

At Mad Devs, you will join a company that values creativity, strategic thinking, and continuous improvement. You will work on projects that reach millions of users worldwide, alongside a strong and supportive team. Here, you will grow professionally, take on meaningful challenges, and contribute to products that solve real problems at scale.

Employees benefits

Flexible working hours

Remote-first culture

Long-term projects

Salary in dollars

Professional communities

Onsite business trips

Training budget

Paid conferences

Hi, I'm Ekaterina.

Applying for jobs should be easy. I am here to simplify the hiring process and set you up for success. Feel free to send me a message via e-mail .

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