15+
Years of experience
$4M
VC funding raised
150+
Homes sold
Hello
— I'm Kobi Mantzur, CTO & Agentic Engineering Architect
Israeli CTO (YC W22) helping teams move from vibe coding to agentic engineering: spec-driven, AI-native software delivery.
- Y Combinator
About
About Me
I've spent 15 years turning ideas into products that scale. As co-founder and CTO of Zorba, I built an AI-powered real-estate marketplace from the first line of code — automating over 70% of a realtor's work and selling 150+ homes to institutional buyers like Blackstone. I pair deep technical ownership with product instinct and a bias for shipping.
I'm Kobi Mantzur, an Israeli CTO and the Co-Founder & CTO of Zorba (YC W22). Before Zorba I started the web infrastructure team at MyHeritage and led the engineering teams behind the American Express Israel and Isracard web platforms. Today my focus is the agentic SDLC: helping engineering teams move from vibe coding to agentic engineering with spec-driven development and AI-DLC, on tools like GitHub Copilot, VS Code agent mode and Claude Code.
I also help companies design and ship AI-first products through architecture consulting, revenue operations and hands-on technical leadership.
15+
Years of experience
$4M
VC funding raised
YC
Alum · W22 batch
- 15+ years building scalable products, from first commit to production
- Co-founded Zorba, went through Y Combinator (W22) and raised $4M in VC funding
- Automated 70%+ of a realtor's work with AI and sold 150+ homes to institutional buyers like Blackstone
- Launched a real-estate market intelligence tool and licensed it to First American
- Started MyHeritage's web infrastructure team and built SaaS products driving $2.5M+ ARR
- Built MyHeritage's developer tooling and CI/CD so engineers could ship code securely to millions of users without breaking anything, years before AI coding agents
- Led all engineering teams at American Express Israel + Isracard, whose platforms serve ~50% of Israeli credit card holders
Services
How I Can Help
Agentic Engineering Enablement
Move your team from vibe coding to spec-driven, agentic delivery. I set up the workflow on the tools you already use, like GitHub Copilot or Claude Code: specs, agent guidance files, human gates and a review flow. Then I train the team to run it.
How agentic engineering worksAI Architecture Consulting
Design and review of AI systems, LLM pipelines, and agentic architectures — from proof-of-concept to production-ready, reliable and cost-aware.
Technical RevOps
I work inside your own cloud, tapping into your CRM, billing and product data to find what's leaking revenue and burning cash, then build the fixes.
How Technical RevOps worksFractional CTO
Technical leadership for early-stage teams — architecture, hiring, roadmap, and the execution rhythm that gets a product from zero to scale.
Technical RevOps
Find the revenue hiding in your data
I work directly in your cloud (AWS, GCP or Azure), tapping into the systems you already run: CRM, billing, product analytics, ad accounts and your warehouse. Your data never leaves your environment. I connect the dots no single dashboard shows, so you see what's leaking revenue, what's burning cash, and what to fix first.
- 01
Connect
Read-only access inside your own cloud account. I join your CRM, billing, product and marketing data into one model of how money actually flows through the business, without copying it out.
- 02
Diagnose
Find the leaks: funnel drop-offs, stalled deals, churn drivers, under-priced plans, wasted ad spend and overlapping tools.
- 03
Fix
A ranked action plan with the dollar impact of each item. Then I build the dashboards, alerts and automations that keep it fixed.
Drive revenue
- Plug funnel leaks
- Recover at-risk accounts
- Spot pricing and upsell gaps
Cut costs
- Kill wasted ad spend
- Trim cloud and SaaS spend
- Automate manual ops work
Works with your stack
- AWS
- GCP
- Azure
- HubSpot
- Salesforce
- Stripe
- GA4
- Amplitude
- Meta Ads
- Google Ads
- Postgres
- BigQuery
- Snowflake
Experiences
Explore My Journey
Over the past 15 years I've gone from full-stack developer to engineering leader to founder — building web infrastructure at global scale, then an AI product from zero through Y Combinator. Each role sharpened how I architect systems that ship.
Zorba
2021 – Present
Co-Founder & CTO
Built an AI-powered marketplace that automated over 70% of a realtor's work — brokering discounted properties to institutional buyers like Blackstone. Sold 150+ homes through the platform, then launched a real-estate market intelligence tool licensed to First American. Went through Y Combinator (W22) and raised $4M in VC funding.
- AI
- Marketplace
- Real Estate
- Data Licensing
- YC W22
- Founder
MyHeritage
Web Infrastructure Lead
At the world's second-largest genealogy company, started the web infrastructure team from scratch and self-built SaaS products that drove over $2.5M in combined ARR. Built the developer tooling and CI/CD pipelines that let engineers ship code securely to millions of users, and made sure nothing broke along the way.
- Web Infra
- CI/CD
- Developer Tooling
- SaaS
- DevOps
- Team Building
American Express
Engineering Lead
Led all engineering teams behind the American Express Israel and Isracard web platforms — accountable for the dashboard used by almost 50% of credit card holders in Israel.
- Engineering Leadership
- FinTech
- Full-Stack
- Scale
Ready to Build the Future with AI?
Turn your vision into intelligent, scalable systems that drive real results. Let's architect something great together.
Contact
Got a Vision? Let's Bring It to Life!
Whether you're moving your team to agentic engineering, building an AI-first product, hunting for revenue in your data, or need hands-on technical leadership, grab 15 minutes and let's talk.
Prefer email? [email protected]