Senior Machine Learning Engineer
Hiire is supporting the search for a Senior Machine Learning Engineer.
This is an opportunity to join an early-stage, product-driven company where AI sits at the core of the platform. You’ll work closely with the founding team and play a key role in shaping the architecture, direction, and evolution of the company’s machine learning capabilities from the ground up.
The team is looking for someone who enjoys solving complex technical challenges, experimenting with modern AI approaches, and building scalable, production-ready systems that deliver real value to users.
As part of a fast-moving startup environment, you’ll have significant ownership, contribute to technical decision-making, and help define engineering and AI best practices as the platform continues to scale.
What You’ll Be Working On
Designing and developing AI/ML capabilities that power core platform functionality
Building and deploying machine learning systems end-to-end, from experimentation to production
Working on problems related to:
Natural Language Processing (NLP)
Intelligent document processing
Semantic search and matching
Information extraction and classification
Web data parsing and enrichment
Experimenting with modern AI techniques, LLMs, and agent-based workflows to improve product capabilities
Training, evaluating, and optimizing models with a focus on scalability, performance, and reliability
Collaborating closely with engineers, product stakeholders, and founders to iterate quickly and deliver impactful solutions
Contributing to AI development standards, tooling, testing practices, and internal processes
Helping balance innovation with pragmatic engineering decisions in a fast-paced environment
What They’re Looking For
3+ years of experience working as a Machine Learning Engineer or AI Engineer in product-focused environments
Strong Python development experience in production systems
Hands-on experience building AI-driven solutions using:
LLMs
Prompt engineering
Fine-tuning techniques
Conversational AI
Multi-agent systems/frameworks
Solid understanding of modern machine learning and NLP concepts
Experience deploying and maintaining ML systems in production environments
Strong problem-solving mindset with the ability to work independently and take ownership
Comfortable operating in ambiguous, fast-changing startup environments
Bachelor’s or Master’s degree in Computer Science, Machine Learning, AI, or a related field
Strong communication and collaboration skills
Why This Opportunity?
High ownership and direct impact on product and technical direction
Opportunity to shape the AI architecture and engineering culture early on
Work alongside experienced founders and high-performing engineers
Fast iteration cycles and exposure to cutting-edge AI technologies
Product-centric environment where engineering work directly influences user value
Strong focus on innovation, experimentation, and continuous improvement
- Locations
- Porto
- Remote status
- Hybrid
Porto
About Hiire
We are based in Estonia and Cyprus, and we operate globally. We love to work remotely and travel the world. Having freedom, ownership and passion for recruitment are key for us.
We hire amazing tech talent for great companies
We coach highly motivated Professionals to get better careers
We empower recruiters to hire more and better Talent.
Do you want to help us to grow?