Data Engineer/Scientist for ML

Location: 24A, Kifissias Avenue,, Athens, Greece

Job Description

Position Summary

We are seeking a specialized Data Engineer or Data Scientist to manage the complete lifecycle of the training data that powers our AI models. This role is pivotal in curating, sanitizing, and structuring high-quality speech and text datasets, serving as the foundation for training state-of-the-art Automatic Speech Recognition (ASR), Text-to-Speech (TTS), and Machine Translation (MT) systems

Role and Responsibilities

Data Pipeline Architecture
Design, build, and maintain robust pipelines for the ingestion, processing, and management of heterogeneous data sources, ensuring efficient flow from raw collection to model-ready inputs.

Unstructured Data Extraction
Extract and process high-fidelity speech data from complex, unstructured sources, including video feeds, multi-channel audio recordings, and raw text archives.

Corpus Curation & Management
Organize, structure, and analyze complex linguistic datasets, including speech-to-text alignments and parallel translation corpora, ensuring metadata accuracy and consistency.

Data Cleaning & Noise Reduction
Implement rigorous quality control protocols to identify and correct errors, remove artifacts, and apply noise reduction techniques to enhance audio clarity.

Dataset Enhancement Strategies
Develop and execute strategies to improve data quantity and diversity, including the application of data augmentation techniques and synthetic data generation.

Cross-Functional Collaboration
Partner closely with Machine Learning Engineers to align data preprocessing workflows and formatting with the specific requirements of various model architectures.

Skills and Qualifications

Programming Proficiency
Advanced proficiency in Python and core data manipulation libraries (e.g., Pandas, NumPy) with the ability to write clean, efficient, and scalable code.

Audio & Data Tooling
Hands-on experience with audio processing and analysis tools (e.g., librosa, torchaudio, Praat) and database management systems (SQL/NoSQL).

ML & NLP Fundamentals
Solid understanding of Machine Learning principles and the specific preprocessing and tokenization requirements for Natural Language Processing (NLP) and speech tasks.

Data Quality Expertise
Proven track record in handling large-scale, messy, or unstructured datasets, with a strong focus on data validation, cleaning, and sanitization techniques.

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