Barcelona-Based Full-Stack AI Engineer for Internal Tools

THEKER Robotics; Barcelona; On-site; EUR 70,000 - 110,000; Full time

Benefits offered by this job

On-site in Barcelona

Career growth opportunities

Job summary

THEKER Robotics seeks a Full-stack AI Engineer to build internal software and AI tools. You will ship end-to-end applications, from the data model to the interface, and bring LLMs into them to reduce friction.

You'll collaborate with engineering and operations teams, own deadlines, and deliver practical solutions in a fast-growing robotics company based in Barcelona, with on-site work and real impact.

Qualifications

• Bachelor's or Master's in CS/SE or related field.
• Strong TS and Python with production React experience.
• Hands-on LLMs: prompt engineering, function calling, RAG, or fine-tuning.
• Willingness to relocate to Barcelona.
• Proactive mindset: question requirements and own deadlines.

Responsibilities

• Build and maintain internal applications end to end in TypeScript and React.
• Design LLM-powered pipelines for code generation, documentation, data extraction and automation.
• Develop retrieval-augmented generation systems over internal knowledge base.
• Build evaluation frameworks to measure and improve AI tool outputs.
• Translate business processes into software: stock, purchasing, or operations.
• Challenge requirements and propose better approaches when needed.
• Own project timelines and deliver what you commit to.
• Identify high-leverage opportunities to apply software and AI.

Skills

TypeScript

Python

React

LLMs

Proactive mindset

Education

Bachelor's or Master's in CS/SE or related field

Tools

LangChain

LlamaIndex

Vector databases

Job description

THEKER Robotics seeks a Full-stack AI Engineer to build internal software and AI tools. You will ship end-to-end applications, from the data model to the interface, and bring LLMs into them to reduce friction.

You'll collaborate with engineering and operations teams, own deadlines, and deliver practical solutions in a fast-growing robotics company based in Barcelona, with on-site work and real impact.