Founding Engineer

TechTree; Warszawa; On-site; PLN 372,000 - 447,000; Full time

Benefits offered by this job

Competitive cash compensation

Equity 1%-2%

Paid lunches / gym passes

Job summary

TechTree in Warsaw is seeking a Founding Engineer to shape the core products and infrastructure for agentic AI. You’ll own critical systems and work on hard problems with full ownership and minimal approvals.

You will scale AI agents, build a state‑of‑the‑art agentic UX, and create benchmarks and evals at token scale while partnering with founding teams. The role combines cutting‑edge tech with rapid iteration and equity‑backed growth opportunities.

Qualifications

• Fluency in Polish and English.
• Shipped agents to production at scale.
• Speed over process with decisive execution and minimal guidance.
• True ownership culture and bias for action.

Responsibilities

• Scale infrastructure for AI agents to run reliably at scale.
• Build state-of-the-art agentic UX.
• Create observability, benchmarks, and evals at token scale.
• Ensure every token delivers maximum value at minimum cost.
• Build and maintain integrations with third‑party platforms and tools.

Skills

Polish

English

Shipped agents to production

Ownership mindset

Tools

TypeScript

Cloud infrastructure

AI tooling

Job description

About the Companies

We work with several Warsaw-based startups in the AI space, building AI agents across different areas - task automation, enterprise support, personal tasks. The common thread: agents designed to genuinely act on a user's behalf, not just assist.

These companies typically raised pre-seed or series A in recent months and have strong founding teams - people who worked early at successful startups or are ex-founders themselves. They tend to have ambitious plans to scale rapidly this year.

These companies are typically still building out their founding teams. Everyone usually gets a meaningful stock options grant and is expected to grow into leading a larger team over time.

About the Roles

As a Founding Engineer, you'd be one of the first technical hires shaping the core products and infrastructures. You'd work on hard, unsolved problems at the intersection of agentic AI and real-world software - with full ownership and no permission required.

What You'll Typically Work On

• Scaling infrastructure that lets AI agents operate reliably at scale
• Building state-of-the‑art agentic UX
• Creating observability, benchmarks, and evals at massive token scale
• Ensuring every token delivers maximum value at minimum cost
• Building and maintaining integrations with third‑party platforms and tools

Tech Stack

Varies by company - typically modern TypeScript‑based stacks, cloud infrastructure, and AI tooling.

What We Look For

• Exceptional engineers or founders - previous wins or big losses, both count.
• Shipped agents to production at scale - not prototypes, real systems, real users.
• Speed over process - you value iteration over perfection and don't wait for sign‑off before pushing to prod.
• No permission culture - comfortable making decisions and shipping with minimal guidance.
• True believer - you see agentic AI as one of the most important things you can work on right now.
• Fluency in Polish & English.

The Teams

Founding teams typically include people with notable exits, early roles at well‑funded startups, and operations backgrounds from large, established companies.

Offices in central Warsaw (onsite). Silicon Valley culture (6-7 day work week)

Compensation (varies by company)

• Competitive cash compensation: $100000- $120000 USD/year
• Meaningful equity: 1%-2%
• Additional perks (varies by company - e.g. paid lunches, gym passes)