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Mercor

Senior machine learning engineer

Mercor, Indiana, Pennsylvania, us, 15705

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Responsibilities

Frame unique ML problems for enhancing ML capabilities of LLMs.

Design, build, and optimise machine learning models for classification, prediction, NLP, recommendation, or generative tasks.

Run rapid experimentation cycles, evaluate model performance, and iterate continuously.

Conduct advanced feature engineering and data preprocessing.

Implement adversarial testing, model robustness checks, and bias evaluations.

Fine-tune, evaluate, and deploy transformer-based models where necessary.

Maintain clear documentation of datasets, experiments, and model decisions.

Stay updated on the latest ML research, tools, and techniques to push modelling capabilities forward.

Required Qualifications

At least 3–5 years

of full-time experience in machine learning model development

Technical degree in Computer Science, Electrical Engineering, Statistics, Mathematics, or a related field

Demonstrated competitive machine learning experience (Kaggle, DrivenData, or equivalent)

Evidence of top-tier performance in ML competitions (Kaggle medals, finalist placements, leaderboard rankings)

Strong proficiency in Python , PyTorch/TensorFlow , and modern ML/NLP frameworks

Solid understanding of ML fundamentals: statistics, optimisation, model evaluation, architectures

Experience with distributed training, ML pipelines, and experiment tracking

Strong problem-solving skills and algorithmic thinking

Experience working with cloud environments (AWS/GCP/Azure)

Exceptional analytical, communication, and interpersonal skills

Ability to clearly explain modelling decisions, tradeoffs, and evaluation results

Fluency in English

Preferred / Nice to Have

Kaggle Grandmaster , Master , or multiple Gold Medals

Experience creating benchmarks, evaluations, or ML challenge problems

Background in generative models, LLMs, or multimodal learning

Experience with large-scale distributed training

Prior experience in AI research, ML platforms, or infrastructure teams

Contributions to technical blogs, open-source projects, or research publications

Prior mentorship or technical leadership experience

Published research papers (conference or journal)

Experience with LLM fine-tuning, vector databases, or generative AI workflows

Familiarity with MLOps tools: Weights & Biases, MLflow, Airflow, Docker, etc.

Experience optimising inference performance and deploying models at scale

Apply here: https://work.mercor.com/jobs/list_AAABmwGdnqiMMld4ODBIgpFh?referralCode=ac03e252-9fa9-4c88-894b-92fdd2994e34&utm_source=share&utm_medium=referral&utm_campaign=job_referral

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