About THEKER
At THEKER, we're taking on one of the greatest challenges of the 21st century: redefining how physical work gets done in the world. We are a robotics and AI company building intelligent, adaptable systems that solve problems traditional automation never could. We recently closed the largest robotics Series A in Europe's history, and we're looking for the top 0.01% of talent to take on that mission with us, and build the biggest company in the world.
Responsibilities
•Build and maintain internal applications end to end in TypeScript and React, from the data model to the interface.
•Design LLM-powered pipelines for code generation assistance, documentation, data extraction and process automation.
•Develop retrieval-augmented generation systems over THEKER's internal knowledge base.
•Build evaluation frameworks to measure and improve the reliability of AI tool outputs.
•Translate business processes into software. Understand how stock, purchasing or operations work before designing the tool that supports them.
•Challenge requirements and propose better approaches when the brief doesn't solve the real problem.
•Own your project timelines. Flag risks early and deliver what you commit to.
•Identify high-leverage opportunities to apply software and AI across the company and scope them into concrete projects.
Requirements
•Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
•Solid TypeScript and Python skills, with experience shipping production web applications in React. We mean real software used by real people, beyond scripts or notebooks.
•Hands-on experience with LLMs: prompt engineering, function calling, RAG, or fine-tuning.
•Business sense. You understand how a company operates (stock, purchasing, orders, costs) and you design software around the real process behind it.
•A critical, proactive mindset. You question requirements and propose better alternatives instead of agreeing to everything. You plan your own work and deliver on the deadlines you commit to.
Nice to have
•Experience building agents or multi-step LLM pipelines with LangChain, LlamaIndex, or custom frameworks.
•Experience with vector databases, embedding-based retrieval or evaluation frameworks for LLM output quality.
•Experience building internal tools, ERPs or business software for inventory, purchasing or operations.
•Background in developer tooling, internal platforms, or MLOps.
Conditions
•Being part of a fast-growing robotics and AI company with genuine ambition, where your career can accelerate alongside us.
•The chance to own THEKER's internal AI tooling from the ground up, with direct visibility into the impact your work has on the entire engineering team.
•A focused, talent-dense team where your work is visible and your decisions count.
•An environment where new ideas are encouraged and your contributions shape both the product and the company.
•100% on-site work in Barcelona.
