Sagi Chizik
I've spent 25+ years building things with technology, because I love it.
Engineer, product thinker, and technical leader - moving between code, products, architecture, and teams, for startups and established companies alike.
You may need this when
Something important is unclear, and the next decision is expensive.
Development is moving too slowly and the explanations do not add up.
A software project is late, stuck, or becoming much more expensive than expected.
You are unsure whether an internal team or external agency is performing well.
Technical direction is unclear, or architecture is making every change harder.
You need senior technical ownership, but perhaps not a full-time CTO.
You are about to make a large technical investment and want an independent view.
You know AI may help the business but do not know where it creates real value.
You inherited a product, team, or codebase that nobody fully understands.
Ways I can help
Technical Reality Check
A focused independent assessment of what is working, what is worrying, and what should happen next.
Understand the assessment →Ongoing technical leadership
Senior ownership of technical and product decisions when the company needs continuity but not necessarily another full-time executive.
Describe what you need →Build, rescue, or implementation
Hands-on intervention, and when needed, additional experienced people I trust.
Describe what you need →Experience, selectively
Engineering depth, then wider responsibility - not distance from the work.
2000s
Engineer → lead developer → architect
Built web, advertising, and game systems; moved from individual implementation into architecture and team leadership.
2012-2020
Senior engineer, team lead, and VP R&D
Worked in product organizations including Wix and Sparkware/888, while taking responsibility for teams, architecture, and delivery.
2020-2024
VP Innovation, lead developer, and staff engineer
Combined hands-on technical depth with product, architecture, and leadership work across fintech, interactive media, and creator software.
Current
Founder, CTO, and AI-driven builder
Works across product decisions, system architecture, technical leadership, and hands-on development - including AI-assisted engineering, coding agents, and building AI-enabled products.
I have spent 25+ years moving between hands-on engineering, architecture, product decisions, and technical leadership across startups, scale-ups, and enterprise companies.
I am most useful when important decisions are being made with incomplete or conflicting information: when a team seems slow, a project keeps getting more expensive, technical direction is unclear, or a company needs experienced ownership without immediately hiring another full-time executive.
I stay close enough to the technology to test what I am being told, but the goal was never more code for its own sake. I like simple solutions to complicated problems, and these days that includes working hands-on with coding agents, AI-assisted development, and automation - not just guiding it from the outside. I am at my best when there is a real problem to untangle.
Blog
Your AI System Has Technical Debt. It’s Just Not Where You’re Looking.
If changing three sentences can change how your product makes decisions, those sentences are part of your production system - and they can accumulate technical debt too.
We Used One AI to Paint the Room and Another to Inspect It
One AI paints the room. Another inspects the painting. All so you can tap an imaginary sofa and buy a real one.
Tell me what's going on.
Don't prepare a formal brief. A few sentences are enough. I'll read them and tell you whether I think I can help.
Describe the situation