24 years of engineering
meets 3 years of production AI
No marketing fluff — just a production system that actually works. So B2B sales teams can stop doing repetitive work and focus on real selling.
Our mission
Free B2B sales teams from repetitive labor to focus on relationships.
AI handles lead discovery, personalization, sending, and tracking. People focus on conversation and trust.
Built by an engineer, not a marketer
Most sales-automation products are built by marketers. We're different — every line of code, every prompt is designed by a senior engineer.
"After 24 years of building products, I've learned that real value comes when tools give people their time back. Let AI do what AI can do, and let people focus on what only people can do."
- 24 years full-stack development
- 3+ years AI / LLM in production
- B2B SaaS architecture & automation
- High-traffic service operation
- LLM agents & RAG implementation
- Multi-LLM gateway operator
Expertise
Three deep specializations meet to make one product.
Full-Stack Engineering
End-to-end ownership across frontend, backend, infrastructure, and DevOps. From high-traffic services to startup MVPs, every stage of the product lifecycle.
- TypeScript / React / Node.js
- Python / Go
- AWS / Docker / CI·CD
- PostgreSQL / Redis
AI / LLM Engineering
Production AI systems: LLM agents, RAG, prompt engineering, token-cost optimization. Designed and operated AI features at scale.
- LLM Agent Architecture
- Gemini / Claude / GPT-4 / Bedrock
- RAG & Vector Search
- Prompt & Cost Optimization
B2B SaaS Architecture
Sales / marketing automation pipelines, multi-tenancy, third-party API integration. Production systems engineered for external API failures and rate limits.
- Workflow Automation
- 3rd-party API Integration
- Idempotency & DLQ
- Observability
Tech stack
Real components running in production today.
Our principles
Standards, not scale, determine product quality.
Enterprise-grade quality
Solo-operated, but engineered to the same standards as large SaaS: reliability, security, observability. No shortcuts.
Founder-led support
Customer inquiries, technical issues, demos — handled directly by the founder. No tiers, no handoffs, fast decisions.
Proven by numbers
Lead count, response rate, conversion — all transparently shown on the dashboard. We prove value with data, not slogans.
Cost-optimized by design
AI inference tokens and external API credits are managed to the cent. Unnecessary calls bypass via DLQ to keep customer cost low.
Journey & roadmap
Where we came from, where we're going.
Company information
- Business name
- 예주아 (Yejua)
- Representative
- 최형준 (Choi Hyungjun)
- Business Registration No.
- 616-47-01212
- Country
- Republic of Korea
- Address
- 115 Dong 101 Ho, 43, Gyeongchungdaero 1461beon-gil, Gwangju-si, Gyeonggi-do 12791, Republic of Korea
- Phone
- +82-507-2097-3331
Let's build the future of sales together
A 30-minute consultation. We'll analyze your sales workflow and show you what AI can take over.
Book a free consultation