Senior Software Engineer

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