Powering conversation for business with nexa voice AI
About the Project
Nexa is a voice-powered AI platform built to automate tasks across sales, support, operations, and more with a clear, intuitive interface that makes AI feel effortless.
Problem Statement
The founder identified a massive gap in the voice AI market: most businesses lose 70-90% of inbound leads due to missed calls and slow response times. Existing solutions were either too complex for non-technical teams or lacked the customization enterprises needed.
He saw an opportunity to build a better platform one that combined enterprise-grade AI capabilities with an interface simple enough for any team to deploy.
The Target Problem
- Businesses missing revenue from unanswered calls
- Sales teams overwhelmed by lead volume
- Existing voice AI tools too rigid or too complex
- No good solution for rapid agent customization
Team
Co-Founder
Product Manager
Developers - 5
UI Designer - Me
My Responsibilities
Visual interface design across all user flows
Complete light and dark mode systems (56 screens)
Billing flow iterations from wireframes to final UI
Component design and specifications for developer handoff
Flow optimizations based on internal team feedback
Design Process
We organized our project timeline strategically to deliver high-quality results efficiently and on schedule
Competitor Research
Value Proposition Canvas
The Value Proposition Canvas (VPC) focuses on deeply understanding users’ problems and designing products or services that solve them.
It’s not just about the business’s value - it’s about the user’s pains, gains and motivations
Sitemap Architecture
Once the sitemap was finalized, we used 
Lovable to create low-fidelity wireframes. This helped us visualize Nexa’s core flows and validate the layout before moving into high-fidelity design
Key Design Decisions
The UI integrates AI features, so it was important to build an interface that simplifies complex AI, builds confidence and trust through design.
Agent Dashboard
The Problem: Users need to know "are my agents working?" within seconds of logging in.
Solution: Metrics-first layout with key performance indicators above the fold. Recent activity feed provides quick troubleshooting access and real-time status visibility across all configured numbers.
Agent Creation Flow
The Agent Creation Screen in Nexa is a workspace where businesses can design and configure their AI agents. Users can set behaviors, define workflows, and test responses instantly, making it simple to build agents that are accurate, efficient, and aligned with business needs. This helps teams save time, reduce errors, and deploy AI agents with confidence.
Voice Selection & Dynamic Testing
Voice selection modal supporting multiple AI voice providers (ElevenLabs, Smallest AI) with filterable categories by gender, accent, tone, and latency. Coupled with real-time dynamic variables, operators can simulate custom parameters before live production publishing.
UI Kit & Light/Dark Mode (56 Screens)
Based on the wireframes, we designed the final product screens with Nexa’s branding, ensuring clarity, consistency, and usability. The idea was to create a supportive interface for operators who spend long hours monitoring campaigns and tweaking agent parameters.
Initial vs Final Designs
After PM feedback, I redesigned the billing interface focusing on immediate cost visibility and transparent breakdowns.
The Problem
- Cost data hidden in charts requiring mental math and interpretation
- No immediate "What do I owe?" or current balance feedback
- Users concerned about hidden fees and missing breakdown by pricing model
The Redesign
- Wallet card with live remaining balance and instant 1-click recharge
- Granular tabs: Summary, Agent Usage, Campaign Usage, Invoice History
- Itemized invoice table with downloadable invoices and transparent rates
Impact: Clear cost visibility establishes trust before purchase decisions. Users can verify charges by agent, campaign, or time period without requiring support intervention.
Internal Usability Testing
An internal usability test of the MVP was done with our team during the pilot. It showed better efficiency, smoother workflows, and positive team feedback.
Results
HeyCoach helps engineers crack MAANG and top product company interviews with mentorship and structured courses. The team was losing leads due to delayed follow-ups, and many prospects dropped off before engaging.
That’s where Nexa Voice AI stepped in.
What’s Next?
