Senior Machine Learning Engineer (NLP)

Were helping an early-stage startup build an AI-powered platform and were looking for a Senior Machine Learning Engineer (NLP) to help shape the core AI/ML architecture behind it. This is a hands-on high-impact role: youll design build and deploy ML systems end-to-end working directly with the founding team to deliver 10x value to our clients. If you love solving open-ended problems with AI and want to shape both the product and the engineering culture from day one this is for you.

Porto (hybrid 2x/week in office) Up to 90k/year

Youll own ML/AI systems at the heart of the platform from model development and training through to deployment and monitoring. Day to day that means building intelligent systems for document processing web data parsing classification search and entity matching applying modern LLM techniques to messy real-world problems.

Youll run experiments with new models data strategies and agentic AI approaches while balancing innovation against production realities like reliability performance and safety. Beyond the code youll help set the standards defining best practices and tooling for AI development across the company and collaborating closely with engineers and founders to keep AI capabilities aligned with what the product actually needs.

• At least 4 years as a Machine Learning / AI Engineer in product-focused environments

• Strong production-level Python

• Hands-on experience building AI/ML systems: LLMs prompt engineering fine-tuning multi-agent systems conversational AI

• A solid grasp of modern ML/AI architectures and tooling

• A track record of taking models from experimentation all the way to production

• Comfort working across data ML and backend systems when the job calls for it

• Strong analytical thinking and ease with ambiguous open-ended problems

• Excellent communication and collaboration in a fast-paced environment

This is a rare chance to own AI at the foundation of a product not inherit it. Youll work shoulder-to-shoulder with the founders make architectural decisions that stick and see your work reach clients quickly. With a competitive salary up to 90k a hybrid setup in Porto and real influence over both product and engineering culture its built for someone who wants their work to matter from day one.