Senior Machine Learning Engineer (AI tools)

SmartRecruiters; Kraków; On-site; PLN 120,000 - 150,000; Full time

Job summary

SmartRecruiters is seeking a Senior Machine Learning Engineer for its team in Kraków, Poland. The role focuses on designing and developing intelligent conversational systems for the recruiting industry, blending cutting-edge technologies such as machine learning and natural language processing.

Join a global team to pioneer AI-driven solutions that enhance the recruiting experience. Qualifications include a degree in a technical field and 5+ years of relevant experience.

Qualifications

• 5+ years of experience developing and deploying machine learning systems in production.
• Proven expertise in NLP techniques and LLM fine-tuning.
• Strong proficiency with deep learning frameworks.

Responsibilities

• Architect and build agentic workflows for adaptive conversational systems.
• Lead design and development of ML/NLP products from ideation to production.
• Collaborate with teams to integrate intelligent agents into workflows.

Skills

NLP techniques

Python programming

Deep learning frameworks

Machine Learning Systems

Agentic workflows

Data Quality Management

Education

BSc or MSc in Computer Science, Machine Learning, AI, NLP, or related field

Tools

PyTorch

TensorFlow

scikit-learn

Hugging Face

Job description

Company Description

SmartRecruiters is the Recruiting AI Company that transforms hiring for the world’s leading enterprises. Built for global scale, SmartRecruiters, an SAP company, delivers an AI-powered hiring platform that automates and optimizes the entire talent acquisition process, ensuring faster and smarter hiring decisions. More than 4,000 companies, including Amazon, Visa, and McDonald’s, rely on SmartRecruiters to build winning teams. In 2025, SmartRecruiters joined SAP, the global leader in enterprise applications. Together, SmartRecruiters and SAP are accelerating the reinvention of hiring by combining cutting‑edge AI innovation with the scale, reach, and resources of SAP’s ecosystem.

Job Description

We are looking for a Senior Machine Learning Engineer to join our Chat Group, where we’re building the next generation of intelligent conversational systems for the recruiting industry. Our mission is bold yet simple: boost the efficiency of recruiting and hiring teams and deliver the most personalized experience ever – powered by cutting‑edge ML, NLP, and agentic AI.

You’ll play a central role in designing and developing agentic workflows, where autonomous AI agents collaborate, reason, and act to deliver intelligent and context‑aware recruiting experiences at scale.

At SmartRecruiters, you’ll be part of a global, high‑impact team shaping how people connect with jobs. You’ll work with passionate peers across Germany, Poland, the UK, and the US – in a culture that values autonomy, innovation, and measurable outcomes.

We’re not just building chat systems – we’re building the AI recruiting assistants of the future.

Important: the position is available only under a standard contract of employment with 80% of tax deductible cost.

What You’ll Do

• Architect and build agentic workflows that combine large language models, reasoning components, and data pipelines to create adaptive, goal‑driven conversational systems
• Lead the design and development of advanced ML/NLP products, from ideation to production – including model training, evaluation, optimization, and deployment
• Drive experimentation with new approaches for agentic reasoning, coordination, and autonomous system design
• Collaborate closely with product and engineering teams to integrate intelligent agents into real‑world recruiting workflows
• Guide technical decisions, mentor other engineers, and help define best practices for scalable, maintainable ML systems
• Contribute to the evolution of our NLP and conversational intelligence stack, focusing on reliability, personalization, and user impact
• Proactively identify opportunities to automate, improve, and innovate within our chat‑based ecosystem

Qualifications

• BSc or MSc in Computer Science, Machine Learning, AI, NLP, or a related technical field – or equivalent practical experience
• 5+ years of experience developing and deploying machine learning systems in production
• Proven expertise in NLP techniques, LLM fine‑tuning, and model evaluation
• Strong proficiency with deep learning frameworks (e.g., PyTorch, TensorFlow) and ML tools (e.g., scikit‑learn, Hugging Face)
• Advanced Python programming skills and solid software engineering fundamentals
• Experience designing and maintaining end‑to‑end ML pipelines, from data ingestion to deployment
• Hands‑on experience with agentic workflows or building autonomous AI systems is a major plus
• Familiarity with chatbots, conversational AI, or multi‑agent systems is strongly preferred
• Experience with data quality management, evaluation metrics, or observability in ML systems is a plus
• Strong analytical thinking, creativity, and an ownership mindset
• Excellent communication and collaboration skills in a cross‑functional, international environment
• Fluency in English, both written and spoken

Additional Information

SmartRecruiters is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.