> Markdown version of [/jobs/ext/3669024-ai-developer-software-engineer](https://www.wearedevelopers.com/jobs/ext/3669024-ai-developer-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# AI Developer / Software Engineer

- **Company:** Número De
- **Location:** Spain
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Business Logic, Computational Linguistics, Spring Framework, Natural Language Processing, Simple Object Access Protocol (SOAP), SQL Databases, Web Services, Core Voice Platform, Retrieval-Augmented Generation, Large Language Models, Gitlab, Information Technology, Natural Language Understanding
- **Published:** October 10, 2026
- **Apply:** https://www.adzuna.es/details/5921095093

## About the Role

Required:

 * Academic degree in Computer Science, Computational Linguistics, Natural Language Processing, a related field, or equivalent experience.
 * At least 1 year of experience as a Software Developer or AI Engineer.
 * Excellent command of spoken and written English.
 * Excellent communication skills; customer-facing.
 * Ambition, enthusiasm and eagerness to learn, with aptitude for analytical and creative thinking and sharp attention to detail.
 * Accountable within demanding deadlines.

Nice to have:

 * Experience with conversational automated dialog systems, either voice- or chat-based. Experience in any other production-level NLU/NLP solutions will also be considered a plus.
 * Experience fine-tuning or training NLP/LLM models.
 * Knowledge of embeddings, vector databases and RAG.
 * Knowledge of Java 17 is a strong asset.
 * Experience consuming external systems such as web services (REST and SOAP).
 * Experience in SQL databases.
 * Experience with GitLab and CI/CD processes.
 * Experience in Spring Framework.
 * Knowledge of Spanish.

## Description

The AI Developer / Software Engineer helps evolve Omilia's Drive-Thru Voice AI solution for Quick Serve Restaurants. The role works across the whole product - engineering and AI/LLM development, conversation analysis, and customer work - on a live system used at scale in thousands of restaurants. The balance across these areas shifts with project needs.

Accountabilities

 * Engineering - Build features, fix bugs, test and deploy releases, and integrate with client systems.
 * AI/LLM - Prototype AI features, fine-tune LLMs for voice ordering, and turn them into production solutions.
 * Conversation analysis - Review real dialogs, assess performance, and identify improvement opportunities.
 * Customer work - Gather business requirements and build the application logic to meet them.

Key Responsibilities

 * Build product features and fix bugs for the Drive-Thru Voice AI solution, including testing and deploying releases.
 * Integrate with client systems as required for assigned work.
 * Prototype AI features and fine-tune LLMs for voice ordering, turning promising prototypes into production solutions.
 * Review real drive-thru dialogs, assess performance, and identify opportunities to improve accuracy and user experience.
 * Work with customers and internal stakeholders to gather business requirements and implement the application logic that meets them.
 * Shift effort across engineering, AI/LLM, conversation analysis, and customer work as project needs change.
 * Communicate clearly in English in both technical and customer-facing contexts, and deliver within demanding deadlines.