Sip Developer Jobs

1 job found

1mo ago

Senior Software Engineer

IQ Ventures Dublin, OH

Dublin, OH

1mo ago Closed

Full time Backend Developer Senior Artificial Intelligence

This position is no longer accepting applications (closed Jul 17, 2026).

Job Description

IQ Ventures seeks a Senior Software Engineer to design, build, and operate real-time VoIP and communication services, prioritizing AI-assisted development and strong engineering fundamentals. This onsite role in Dublin, Ohio requires hands-on production software experience, VoIP expertise, and collaboration on architecture and tooling.

Responsibilities

Design, implement, and sustain VoIP and real-time communications infrastructure, including call routing, signaling, media handling, and the surrounding systems.
Collaborate with carriers, SIP trunks, and telephony providers; diagnose and fix issues across signaling and media paths.
Identify and resolve real-time quality problems such as latency, jitter, packet loss, one-way audio, and failed call setups using packet captures and log analysis.
Deliver clean, well-tested code and own features from design through production and on-call support.
Leverage AI coding tools in day-to-day work for code generation, refactoring, reviews, and testing, applying sound engineering judgment to every release.
Participate in architecture decisions, review code from teammates and AI-assisted sources, and guide responsible adoption of new tooling.
Enhance observability, reliability, and security across the communication stack.

Requirements

Minimum five years of professional software development experience delivering production systems, with a solid foundation in data structures, systems design, debugging, and testing.
Practical, up-to-date experience using AI coding tools as part of production work, including multi-file changes, refactors, test generation, and code reviews, with the ability to verify and own AI-generated outputs.
Experience with signaling protocols such as SIP, with familiarity with additional protocols like H.323 preferred.
Media transport expertise including RTP, SRTP, RTCP, and common audio codecs (G711, G722, Opus).
WebRTC proficiency for real-time communications in browser and app contexts.
Experience with PBX or softswitch platforms such as Asterisk, FreeSWITCH, or Kamailio.
Knowledge of Session Border Controllers, NAT traversal methods (STUN, TURN, ICE), and quality of service concepts.
Experience with carrier and SIP trunk integrations, number provisioning, and call routing.
Proficiency across the backend and frontend stack, including Go (Golang) and Python on the server, and Vue on the client; strong experience with at least two and familiarity with the third.
Fundamentals of networking — TCP/UDP, DNS, TLS, firewalls and NAT, plus ability to read packet captures (Wireshark, sngrep).
Comfort operating code in production, including monitoring, on-call duties, and incident response.
Strong written and verbal communication skills.

Technologies

Claude Code, Cursor, GitHub Copilot, Codex, Windsurf
Go, Golang, Python
Vue
SIP, H.323
WebRTC, RTP, SRTP, RTCP
Codecs: G.711, G.722, Opus
PBX/softswitch: Asterisk, FreeSWITCH, Kamailio
Session Border Controllers, NAT traversal: STUN, TURN, ICE
SIP trunking, number provisioning
Networking: TCP, UDP, DNS, TLS, firewalls, NAT
Packet capture tools: Wireshark, sngrep
Cloud providers: AWS, GCP, Azure
Orchestration and IaC: Kubernetes, Terraform

Benefits

401(k) and employer matching
Dental, health, and vision insurance
Life insurance and employee assistance program
Flexible schedule and flexible spending account
Health savings account
Paid time off and parental leave
Referral program and retirement plan

Experience

Software development experience: 4 years (Preferred).

Ability to commute

Location: Dublin, OH 43017. Onsite requirement.

Nice to Have

Experience with additional languages in the broader stack such as C/C++, Rust, TypeScript, SQL
Knowledge of Model Context Protocol (MCP) and integrating AI tools into internal workflows
Experience scaling real-time media, including media servers, transcoding, and conferencing/SFUs
Awareness of telecom regulatory requirements (E911, STIR/SHAKEN, number portability)
Cloud and infrastructure as code experience (AWS/GCP/Azure, Kubernetes, Terraform)
Contributions to open source telephony or real-time projects
Security experience related to telephony, including toll fraud prevention, encryption, and hardening

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