Senior Full-Stack Engineer (Technical Lead) $$$$ Offline

About Velocity Voice

We're a conversational AI-powered dialing platform processing 500,000+ calls per day for insurance lead generation, scaling to 5M+ daily calls within 6 months. We're bootstrapped, profitable, and moving fast.

We've built something nobody else has: a real-time outbound dialing system that combines Outbound Dialing carriers with Conversational AI with a 4-agent AI optimization pipeline that continuously improves performance for clients. Our clients are committed enterprise customers who depend on our infrastructure running flawlessly at scale.

Tech stack: Next.js/React, PostgreSQL (Supabase), TypeScript, Vercel

The Challenge

You'll be our first technical hire and will own the entire codebase. Right now, our database is the bottleneck—write throughput, index locks, and concurrent updates are slowing us down at 500K calls/day. We need someone who can architect for 10x scale while shipping features at startup velocity.

This isn't a "maintain the legacy system" role. This is "take ownership of a complex, production system processing millions of dollars in daily call volume and make it bulletproof."

What You'll Do (First 90 Days)

1. Solve the database bottleneck – Optimize our Postgres setup for 5M+ daily calls. Eliminate write contention, redesign indexes, implement proper connection pooling strategies, and future-proof our schema.
2. Establish engineering foundations – Build out CI/CD pipelines, testing frameworks, code review processes, and deployment best practices across local/staging/prod environments.

3. Own the architecture – Make technical decisions independently. Refactor what's slow. Rebuild what's broken. You have full authority to improve the codebase.

    

What You'll Own (Ongoing)

• Frontend: Next.js/React application (campaign setup, real-time call monitoring, analytics dashboards)
• Backend: API integrations with telephony providers, webhook processing at massive scale, async job orchestration
• Database: Supabase/Postgres schema design, query optimization, connection management
• Infrastructure: Vercel deployment, observability with Grafana, performance monitoring

• AI systems: Maintaining our 4-agent optimization pipeline that analyzes call transcripts and improves conversions

   

You're a Great Fit If...

✅ You've scaled production systems – You've debugged Postgres at high write volumes. You know the difference between connection pooling strategies. You've optimized queries that process millions of rows.

✅ You ship fast with AI tools – You're using Claude, Cursor, Copilot, and/or other AI tools to 10x your output. You embrace the vibe coding era.

✅ You thrive on autonomy – You don't need hand-holding. Give you a problem, you research solutions, propose an approach, and execute.

✅ You think in systems – You understand distributed systems, async processing, webhook reliability, and real-time data flows.

✅ You care about craft – You write clean, maintainable code. You document decisions. You think about the next engineer who touches your work.

Required Experience

• 5+ years building production web applications
• Deep expertise with React/Next.js (SSR, ISR, API routes, performance optimization)
• Strong PostgreSQL skills (indexes, query plans, connection pooling, schema design)
• Experience with high-volume API integrations and webhook systems
• Comfortable working in EST timezone (at least 80% overlap)
• Excellent written English (B2+) for async communication

Nice to Have

• Supabase experience (RLS policies, Edge Functions, Realtime subscriptions)
• Telephony/real-time communication systems
• Experience at high-growth startups or bootstrapped SaaS

• Previous technical leadership or mentorship

   

What We Offer

💰 $3,000-4,000/month based on experience
🎯 Performance bonuses tied to KPIs (system uptime, feature velocity, scale milestones)
🚀 Ownership from day one – You're not a cog. You're the technical leader.
⚡ Bleeding-edge stack – AI-powered development, modern tools, no legacy baggage
📈 Hypergrowth – 50x scale in 6 months. Your work directly impacts revenue.
🌍 Fully remote – Work from anywhere

Our Culture

We move fast. We ship features in days, not quarters. We trust you to make decisions and own outcomes. We embrace AI tools and modern development workflows. We're building something novel that our clients genuinely love.

If you're excited about working on a high-scale, high-impact SaaS product at the intersection of AI and telecommunications, where your technical decisions directly affect millions of calls and millions in revenue, we want to talk.

How to Apply

Send us:

1. Your CV/resume
2. GitHub profile or portfolio (we want to see Next.js + Postgres work)

3. Brief note (3-5 sentences) about the gnarliest database performance issue you've debugged and how you solved it

    

We'll respond within 48 hours. First step is a paid technical assessment ($150, 4-6 hours) that mimics real work you'd do here.