Location: Lisbon,Lisbon,Portugal
We are seeking an AI Engineer (Speech & NLP Systems) to advance the intelligence, robustness, and real-world performance of our voice and language capabilities.
In this role, you will develop and integrate end-to-end speech and NLP pipelines, including ASR, NLU, and intent/slot models, enabling natural and reliable interactions within our platforms. You will focus on improving system resilience across noise conditions, accents, and diverse real-world usage while supporting language understanding and dialog behavior.
Working closely with QA and platform teams, you will optimize models for latency and resource constraints, define evaluation strategies for speech and NLP quality, and ensure solutions are production-ready in constrained or embedded environments. Your work will directly enhance how users interact with our systems through voice and conversational experiences.
If you are passionate about building intelligent voice-driven systems and turning complex speech and language challenges into seamless user experiences, this may be your next mission.
What will you do?
What are we looking for?
What can you expect from us?
A permanent job contract for a long-term project;
Tech equipment + SIM Card + personal smartphone;
Health and Life Insurance;
Social events and team buildings;
The commitment of letting you grow with us, and be rewarded accordingly;
A dynamic and young team that will always be there to support you;
Training in the latest technologies;
Coffee, fruits, snacks, and a warm welcome whenever you visit the office.

Caixa Mágica Software is a Portuguese SME and a recognized leader in the open source ecosystem. Founded in 2000 as a spin-off from a university research project, we’ve grown into a trusted technology partner for both public institutions and private companies across Europe.
Our journey began with the development of the Linux Caixa Mágica distribution, and over the years, we’ve expanded into embedded systems, cloud platforms, mobile and web applications and digital identity solutions. We're also the official LPI certification provider in Portugal and a consistent contributor to EU-funded research and innovation projects.
With a strong foundation in open source values, we believe in building sustainable, secure and future-ready technology. Always through collaboration, transparency and innovation.