Senior Machine Learning Engineer

Position:
Senior Machine Learning Engineer

Company:
Toloka

Location:
Europe, Remote

Employment type:
Full Time

Short Summary:
As a Senior ML Engineer, you will design, train, and deploy AI agents that drive core products, focusing on end-to-end ML tasks including fine-tuning and Reinforcement Learning (RL).

Responsibilities:
- Train, fine-tune, and distill ML models (including RL approaches) to power autonomous AI agents.
- Build and operate agentic workflows in Python, handling complex reasoning and hybrid human-expert interactions.
- Own evaluation and benchmarking, selecting foundational models and establishing cost models.
- Manage the full ML lifecycle: design solutions, ship to production, and monitor real-time signals.
- Implement observability metrics tailored for agent logic, model performance, and system reliability.

Requirement:
- 3+ years of experience in ML: Strong background in model training, fine-tuning, and Reinforcement Learning (RL).
- 1+ year in Agent Development: Practical experience building, evaluating, and launching autonomous AI agents.
- Proven experience working with frameworks such as LangChain, LlamaIndex, or AutoGen.
- Practical knowledge of model distillation and adapting open-source models (e.g., Llama, Mistral).
- Advanced proficiency in Python with a drive to apply disciplined software engineering standards to ML.
- Ability to work across the entire chain, from research to production operations.
- Fluency in English (B2 or above).

Benefits:
- Competitive compensation package including base salary, bonus, and ESOP.
- Paid PTO and benefits will vary depending on location.
- IT setup and home office allowances.
- Equal Opportunity Employer: Toloka is committed to providing equal opportunity and fostering an inclusive environment.