Senior AI Fullstack Engineer — Remote & Production AI

Tappz GmbH; Województwo mazowieckie; Remote; PLN 150,000 - 210,000; Full time

Job summary

Tappz is building AI-native applications and seeks an engineer focused on AI systems and agent development in Warsaw. You will design and build backend systems powered by LLMs, develop agent workflows, and implement RAG pipelines for production AI features.

You will own prompt orchestration, context management, and performance optimization, joining a fast-growing startup to ship impactful AI features with flexible remote options.

Qualifications

• Experience building backend and frontend systems with Node.js/Next.js and TypeScript.
• Deep experience with LLMs and AI APIs.
• Experience building AI agents or multi-step workflows.
• Experience with vector databases (Pinecone/Weaviate) and RAG.
• Prompt engineering and system design for production AI features.

Responsibilities

• Design and build backend systems powered by LLMs.
• Develop agent workflows and tool integrations.
• Build RAG pipelines with vector search.
• Handle prompt orchestration and context management.
• Optimize performance, latency, and cost.
• Ship AI features into production products.

Skills

AI systems & agent development

LLMs & AI APIs

Ownership & fast-paced mindset

Tools

Node.js

Next.js

Typescript

Python

Nest.js

GCP

Pinecone

Weaviate

Job description

Tappz is building AI-native applications and seeks an engineer focused on AI systems and agent development in Warsaw. You will design and build backend systems powered by LLMs, develop agent workflows, and implement RAG pipelines for production AI features.

You will own prompt orchestration, context management, and performance optimization, joining a fast-growing startup to ship impactful AI features with flexible remote options.