Preview with sample data01Enterprise delivery
Voice AI at a Fortune 100 Bank
Voice agents call bank customers about overdue payments and can transfer them to bank staff. The system runs inside the bank’s network.
PythonTypeScriptSIPContainers
Joe Carothers · Founding Engineer at Salient
I build voice agents and the tools teams use to run them.
I led engineering for a Fortune 100 bank deployment and build tools for testing, reviewing, and investigating AI calls.
- Enterprise voice systems and the tools to operate them
- Led a Fortune 100 bank rollout, live since Sept 2025
- Python services, TypeScript, and React interfaces
Selected work / 01—04
Selected work
Voice AI at a bank, real-time voice infrastructure, tools for reviewing calls, and my own coding-agent workspace.
Preview with sample data
Preview with sample data02Voice infrastructure
Keeping a Voice Agent Fast and Never Silent
Debugging the real-time path of our phone agents: where a slow reply's seconds went, and why an agent went silent mid-call.
PythonLiveKit AgentsStreaming STT/TTSSIP
Preview with sample data03Product engineering
Tools for Operating Voice Agents
Four connected tools for testing voice agents, reviewing calls, investigating patterns and exploring call data in plain English.
TypeScriptReactPythonAI agents
Preview with sample data04Personal project
Agent Orchestration Workspace
A personal local control room for planning coding-agent work, isolating workers in Git worktrees, reviewing results and approving an exact saved patch.
Node.jsTypeScriptGit WorktreesSQLite
Experience
Salient
Founding Engineer
San Francisco, CA
01/2025 - Present
- Lead engineering for a Fortune 100 bank deployment: contact-center integration, infrastructure, release coordination and model-review work. Live since September 2025, with a second line of business added in July 2026.
- Build the platform's call-review, evaluation and investigation tools, spanning React interfaces, Python services and AI-agent workflows.
- Debug the real-time voice path: response latency, streaming speech failures and multi-call audio bugs, with call test harnesses to catch them.
- Develop self-serve agent design and reporting tools; this is ongoing product work.
Action Network
Software Engineer
Remote
07/2022 - 10/2024
- Built a shared UI component library adopted across multiple products
CMDI
Client Representative & Front End Developer
Tysons Corner, VA
04/2020 - 07/2022
- Built a Next.js marketing site with a headless CMS and internal tools for tracking client reporting work.
Cherry Communications
Supervisor
Tallahassee, FL
05/2019 - 04/2020
- Promoted to supervisor within eight months; trained new hires and monitored call quality for a team of more than 30.
Earlier work and libraries
A React library that shows who owns a page and lets users request or release ownership through the app’s storage or API.
I built a shared app for a support team that had been tracking client reporting deadlines and contacts in spreadsheets.