Senior AI-Native Full-Stack Engineer (Remote)

Leadtech; Poland; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Flexible schedule

Remote or Barcelona office option

Private health insurance

25 days vacation + birthday off

Office perks in Barcelona

Job summary

Leadtech Group is seeking a skilled Full-Stack Developer to join our development team. You will build and scale AI-driven platforms across the stack, delivering fast and robust features using a modern tech stack.

You’ll work on API design, AI agents, and UI with React and TypeScript, collaborating with AI product managers to translate complex requirements into scalable solutions. The role emphasizes hands-on development, autonomy, and a remote-first, international team culture, with

Qualifications

• Extensive experience with the Python framework
• Deep API integration with 3rd party vendors
• Self-learner adapting quickly to new tools and platforms
• TypeScript proficiency in frontend and backend
• Frontend expertise with React and modern state management
• Backend experience building REST APIs with Node.js and NextJS/Express
• Database experience with PostgreSQL and ORM/Query builders
• Knowledge of LangGraph, LangChain, LangFuse
• Problem-solving mindset and autonomous work style
• Passion for AI and building AI-powered products
• High agency with Product Owner collaboration
• Creativity and proactivity in feature development

Responsibilities

• Build and scale AI-powered platforms across the stack
• Develop RESTful APIs with NextJS/Express
• Create AI agents with LangGraph, LangFuse and LangChain
• Develop frontend UI with React and TypeScript
• Integrate external services and handle webhooks
• Collaborate with AI product managers and maintain PostgreSQL/BigQuery migrations

Skills

JavaScript/TypeScript

React

Node.js

REST APIs

AI integration

Frontend React

PostgreSQL

GCP

LangGraph/LangChain/LangFuse

API integrations

Tools

NextJS/Express

LangGraph

LangFuse

LangChain

Vite

ORM/Query Builder

GCP

Job description

Leadtech Group is seeking a skilled Full-Stack Developer to join our development team. You will build and scale AI-driven platforms across the stack, delivering fast and robust features using a modern tech stack.

You’ll work on API design, AI agents, and UI with React and TypeScript, collaborating with AI product managers to translate complex requirements into scalable solutions. The role emphasizes hands-on development, autonomy, and a remote-first, international team culture, with