Field / Site CTO

TechTree; Warszawa; On-site; PLN 240,000 - 420,000; Full time

Job summary

TechTree in Warsaw seeks a Field CTO to be a senior technical leader embedded in client environments. You will turn ambitious AI initiatives into working systems, own end-to-end delivery, and lead delivery teams while representing the company’s technical capability externally.

You’ll join a growing guild of Field CTOs, shaping standards, documentation, and engagements with high agency and ownership. English fluency is essential for client interactions and leadership discussions.

Qualifications

• Founder experience in a startup or exit, or significant team growth.
• Strong engineering roots with proximity to code (7–10+ years).
• Proven leadership in building and scaling engineering teams (5–50 people).
• Experience operating in 0→1 or 1→10 environments with ambiguity.
• AI fluency with modern LLM or production AI features.
• Excellent English and professional presence for client demos and leadership discussions.

Responsibilities

• Own the technical delivery of AI transformation engagements for enterprise customers.
• Lead architecture, implementation, and deployment of AI systems and agentic workflows.
• Act as the senior technical point of contact for clients, presenting in demos and leadership meetings.
• Hire, grow, and lead small delivery teams (5–50 people) as engagements scale.
• Set and maintain engineering standards, documentation, and delivery quality.
• Translate complex technical concepts into clear narratives for technical and non-technical audiences.
• Contribute to reusable IP and methodology after each engagement.
• Move at a pace that accelerates timelines.

Skills

Engineering leadership

AI fluency

Hands-on coding

Delivery leadership

Startup experience

Executive presence

English proficiency

Tools

Cloud platforms

LLM systems

Job description

An AI transformation firm. They help companies turn AI ambition into working business systems - combining strategic advisory with hands-on and agentic execution, from board-level governance to AI systems deployed in real workflows.

A small team of practitioners augmented by AI agents. Two to three people delivering what a 14-person consulting team used to deliver. Every engagement produces working software and leaves behind reusable IP that makes the next engagement faster.

About the Role

As Field CTO, you'll be the senior technical leader embedded in client environments - the person who turns ambitious AI initiatives into working systems, and who builds the credibility and trust to do it again and again.

This is not a pure advisory role. You'll be hands-on: building, shipping, and demonstrating. You'll own the technical side of customer engagements end-to-end, lead delivery, and be the face of the company's technical capability externally.

You'll also be part of a growing guild of Field CTOs - contributing to shared standards, documentation, and each other's engagements when needed.

What You'll Do

Own the technical delivery of AI transformation engagements for enterprise customers

Lead architecture, implementation, and deployment of AI systems and agentic workflows

Act as the senior technical point of contact for clients - present in demos, stakeholder meetings, and leadership discussions

Hire, grow, and lead small delivery teams around you (5-50 people) as engagements scale

Set and maintain engineering standards, documentation, and delivery quality across engagements

Translate complex technical concepts into clear, compelling narratives for both technical and non-technical audiences

Contribute to the company's reusable IP and methodology after each engagement

Collapse timelines - move at a pace most organisations can't match

What We're Looking For

Founder experience - an exit, meaningful funding raised, or significant team growth. You've built something from the ground up.

Strong engineering roots (7-10+ years) - still close to code. Backend, full-stack, or infrastructure background.

Proven leadership - you've built and scaled engineering teams from scratch (5-50 people).

Startup DNA - you've operated in 0→1 or 1→10 environments and thrived in ambiguity.

AI fluency - you understand modern LLM and AI systems, or have shipped AI-driven features in production.

Excellent English and professional presence - comfortable in demos, client meetings, and executive discussions.

High agency, urgency, and ownership - you operate with full autonomy, move fast, and take responsibility for outcomes.

Nice to Have

Experience in AI, voice, SaaS, or agentic systems

Technical pre-sales or customer-facing background

Multi-disciplinary understanding across product, data, infrastructure, and delivery

Strong Signals

Former CTO or Head of Engineering at a startup

Director transitioning from a high-growth mid-size tech company

Hands-on AI/ML background with active practitioner experience

Track record of shipping products and scaling technical teams

This Role Is Probably Not For You If

Your background is primarily pre-sales or solutions engineering with limited engineering depth

You've been an enterprise VP with minimal hands-on coding in recent years

Your experience is predominantly in research, academia, or heavily regulated sectors without a clear product shipping track record

You've moved companies every 1-2 years without a clear narrative

What This Environment Looks Like

High agency. No hand-holding. AI agents handle a large portion of delivery. You'll have access to the founder on every engagement. You'll see how deals are structured, how client relationships evolve, and how strategy becomes execution - fast.

Compensation: above Polish market rates; benchmarked in top quintile of Index Ventures portfolio.