David T.
Data Expert
Experience
Jan 2025 - Jun 2025
6 monthsFreelance AI Trainer (NLP & LLM Evaluation)
Freelance AI Trainer
- Designed and evaluated high-quality prompts and completions for Large Language Models (LLMs), focusing on improving response accuracy, instruction-following behavior, and factual consistency.
- Annotated and rated LLM-generated outputs for grammar, coherence, relevance, and truthfulness.
- Developed RLHF-style preference data by ranking model completions to inform reinforcement learning fine-tuning cycles.
- Participated in prompt engineering experiments to assess the effect of instruction format, verbosity, and phrasing on model behavior.
- Conducted error analysis and quality assurance on large-scale NLP datasets, identifying edge cases and linguistic ambiguity affecting LLM performance.
May 2024 - Sep 2024
5 monthsLagos, Nigeria
Senior Data Scientist
Babban Gona
- Led the Data Analytics team of 12 analysts to deliver actionable insights for decision-making by the management team.
- Designed and implemented scalable data systems to handle increasing data size and velocity, ensuring optimal system performance and efficiency.
- Developed and automated ETL processes using BigQuery and introduced Power BI Dataflows to reduce data retrieval time and cut down average BI dashboard refresh time from 3 hours to under 20 minutes.
- Supported the administration and maintenance of business intelligence applications, including user onboarding, software updates, and adherence to best practices in data governance.
May 2023 - Sep 2023
5 monthsHamilton, Canada
Machine Learning Researcher
Hamoye AI Labs
- Tuned and optimised the performance of Tensorflow models with Katib AutoML.
- Collaborated with the Data Science team to design, develop, and implement ML algorithms, contributing to the enhancement of predictive models.
- Designed and evaluated prompts for machine learning models, defining comprehensive accuracy metrics which significantly enhanced predictive performance.
Feb 2023 - May 2024
1 year 4 monthsLagos, Nigeria
Data Analyst
Future Oilfield Services Limited
- Developed and implemented automated data migration pipelines from existing company sheets to the ERP system for efficient handover from planning to operation phases.
- Developed a data collection system to enable seamless data loading into the CRM platform and incorporated best practices into data entry procedures for all business units.
- Trained the company’s business heads on auditing data for their respective business units, thereby ensuring good data quality.
- Monitored progress of various Well Services projects, identifying potential risks and implementing mitigation strategies.
Summary
I am a seasoned data expert with extensive experience in machine learning, NLP, data analytics, and prompt engineering for large language models. My work has allowed me to improve model performance, refine data pipelines, and transform raw data into actionable insights.
I have successfully led teams, optimized ETL processes, and consistently delivered high-quality analytical solutions. I continuously pursue new challenges and leverage my strong technical background and certifications to deliver value in data-driven environments.
Languages
English
NativeFrench
IntermediateGerman
ElementaryEducation
Sep 2024 - Oct 2026
Politecnico di Torino
Master of Science, Chemical and Sustainable Processes Engineering · Italy
Sep 2024 - Oct 2026
Technical University of Munich
Master of Science, Materials Science and Engineering · Munich, Germany
Sep 2024 - Oct 2026
École des Mines de Saint Étienne
Master of Science, Chemical and Bio-Chemical Engineering · Saint-Étienne, France
...and 1 more
Certifications & licenses
ALX Data Science
DataCamp Data Analyst Professional
DataCamp Data Engineer Associate
DataCamp Data Scientist Professional
Microsoft Certified: Fabric Analytics Associate
Microsoft Certified: Power BI Data Analyst Associate
Oracle Cloud Infrastructure Foundations Associate
Need a freelancer? Find your match in seconds.
Try FRATCH GPT More actions
Similar Freelancers
Discover other experts with similar qualifications and experience
- English
- Deutsch
2025 © FRATCH.IO GmbH. All rights reserved.