Machine Learning Engineer I (AI)

Location: Sofia, Bulgaria — hybrid

Company

hirify.global provides AI-powered offer management and revenue optimization software for the airline industry.

What you will do

• Implement machine learning models and data pipelines with guidance from senior engineers and data scientists.
• Convert research prototypes into reliable, scalable production workflows.
• Develop feature engineering and data pipeline workflows.
• Contribute to model training, evaluation, and performance tuning.
• Deploy, monitor, and maintain ML models in batch and near-real-time environments.
• Debug data pipeline and model performance issues and integrate ML components with production systems.

Requirements

• Degree in Computer Science, Statistics, Engineering, or a related field; a master's degree is preferred.
• Experience in machine learning, data science, or a related area, including internships.
• Proficiency in Python and familiarity with NumPy, Pandas, and scikit-learn.
• Experience with TensorFlow, PyTorch, and/or machine learning workflows.
• Knowledge of core machine learning and AI models, along with strong problem-solving skills and willingness to learn.

Nice to have

• Exposure to advanced ML techniques and large-scale optimization problems.
• Experience deploying, monitoring, and maintaining models for batch and real-time inference.
• Experience with pricing, revenue management, or offer optimization.
• Experience crafting prompts, using AI tools, or applying agentic AI systems.

Culture & Benefits

• Flexible ways of working and a culture focused on care, innovation, ownership, and accountability.
• Opportunities for continuous learning and professional growth.
• Work on AI-driven airline retailing and intelligent offer and revenue optimization.