Founding Engineer - AI Agents

Hiring via TechTree This is a role that TechTree is recruiting for on behalf of one of its clients. TechTree is an AI-driven recruitment platform working with high-growth companies. When you apply, TechTree's AI Agent matches you not just to this role, but to other relevant opportunities across its network, so one application can unlock multiple roles. Founding Engineer | Agentic AI | Warsaw TechTree's client is hiring a Founding Engineer to join one of the earliest technical teams building next-generation AI agents and personal AI products from the ground up. This is a high-ownership opportunity for an exceptional engineer or former founder who has already shipped AI agents into production and wants to help shape both the product and technical foundation of an ambitious early-stage company. Location: Warsaw, PolandWork model: On-siteEmployment: Full-timeCompensation: $100,000–$120,000/year + 1–2% equityLevel: Mid-Senior / Senior What You'll Work On Build and scale production-grade agentic AI systemsDesign infrastructure for reliable AI-agent execution at scaleDevelop agent observability, evaluation, and benchmarking systemsImprove reliability, latency, and cost efficiency across large-scale LLM workflowsBuild state-of-the-art agentic product experiencesCreate and maintain integrations with third-party platforms and toolsMake architectural and product decisions with significant autonomyShape engineering standards and technical direction as an early team member What We're Looking For Proven experience shipping AI agents to production, not just prototypesExperience building B2C products used by real customersStrong understanding of agent observability, evaluation, reliability, and cost managementPrevious experience as a founder, founding engineer, or early engineer at a fast-moving startupStrong system-design and software-engineering fundamentalsComfortable working with modern TypeScript, cloud infrastructure, and AI toolingFluent Polish and EnglishBased in Warsaw or genuinely willing to relocateComfortable with a highly ambitious, fast-paced, ownership-driven startup environment Strong advantages Previous experience founding a technology companyInternational study or work experienceCombination of top-tier technology-company and early-stage startup experienceExperience scaling AI products to significant user volumesStrong product instincts alongside technical depth Why consider this opportunity? Join at the founding-engineer stageBuild core AI technology from the ground upSignificant influence over product and architecture1–2% meaningful equity ownershipWork directly with an experienced founding teamOpportunity to grow into technical leadership as the company scales If this sounds like a fit, we'd love to hear from you. Apply today!