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LoiZéro

Senior Data Processing Developer

Data EngineeringUpdated on Nov 12
Full-timeNo salary listedIn-person

About the Job

Requirements

  • A degree in computer science, software engineering, or a related field is required.
  • Demonstrated experience processing massive unstructured text datasets at trillion-token scale, with more than five years of experience in data processing, machine learning engineering, or natural language processing.
  • Hands-on experience with distributed processing frameworks such as Spark, Ray, or Flink, and designing and optimizing high-throughput pipelines.
  • Experience implementing data privacy measures, including personally identifiable information masking; content safety filtering for toxicity and bias; and evaluation contamination prevention.
  • Ability to work with Research, Engineering, and/or Legal and Governance teams and translate varied requirements into concrete pipeline work.
  • Strong proficiency in Python, including writing production-quality data-processing code.
  • Experience with pipeline orchestration frameworks such as Airflow, Prefect, or Dagster.

Responsibilities

  • Partner with the Research team to define, build, automate, scale, and manage data pipelines that transform web-scale raw data into training datasets for AI Researcher.
  • Build and maintain data-processing pipelines, including deduplication, model-based quality scoring, heuristic filtering, toxicity removal, personally identifiable information masking, metadata extraction, and proprietary data transformations; maintain dataset versioning and provenance tracking while optimizing throughput and cost at scale.
  • Ensure all ingested data meets compliance requirements, internal data-governance policies, and legal obligations.
  • Develop and refine scoring and filtering tools, including heuristics, large language model evaluators, machine-learning classifiers, metadata extraction modules, and human-in-the-loop review workflows for data processing and quality assurance.
  • Instrument data-processing pipelines with data-quality monitoring, guardrails, and alerts to detect regressions before they propagate downstream.
  • Collaborate with Research and other teams to understand evolving data requirements and identify and acquire large text corpora that meet those requirements; conduct systematic coverage analyses to identify corpus gaps, develop targeted acquisition strategies, and work with Legal and Governance to license new data sources.
  • Design and maintain strict leakage-detection mechanisms to prevent evaluation contamination at every stage of the data-processing pipeline.
  • Build internal tools and interfaces that let researchers explore, query, and understand available datasets with minimal friction.

Desired Qualifications

  • Experience training, fine-tuning, or deploying machine-learning models for data-quality tasks, including classifiers and large language model evaluators, and familiarity with large language model inference optimization tools such as vLLM or SGLang.
  • Familiarity with containerized deployment using Docker or Kubernetes and infrastructure-as-code practices.
  • Familiarity with machine-learning experiment-tracking tools such as Weights and Biases.
  • Experience with data-licensing workflows or web-scale data acquisition.
  • Contributions to open-source data-processing or natural language processing tools.

About the Company

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