David Thompson-Ajayi-AI Trainer (NLP & LLM Evaluation)
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Experience
AI Trainer (NLP & LLM Evaluation)
Freelance
- 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.
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.
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.
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.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Energy, Information Technology, and Agriculture.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Business Intelligence, Project Management, Research and Development, and Quality Assurance.
Summary
Data Scientist and a current master’s student in Multiphase Systems, specializing in energy systems, advanced simulations, and multiphase reactor design. Experienced in process control, computational fluid dynamics and applied machine learning, with prior industry experience as a Chemical Engineer and Data Expert.
Skills
- Simulation & Modeling: Ansys Fluent, Openfoam, Polysun
- Programming & Data: Python, Sql, Fortran, Matlab, C++
- Tools & Platforms: Ms Office Suite, Power Bi, Bigquery, Linux
Languages
Education
Technical University of Munich / Politecnico di Torino / École des Mines de Saint Étienne
Erasmus Mundus Joint Masters · Multiphase Systems · Munich, Germany
Obafemi Awolowo University
Bachelor of Science · Chemical Engineering · Nigeria · 4.27/5.00
Certifications & licenses
ALX Data Science
DataCamp Data Analyst Professional
DataCamp Data Engineer Associate
DataCamp Data Scientist Professional
Oracle Cloud Infrastructure Foundations Associate
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
David is based in Munich, Germany and can operate in on-site, hybrid, and remote work models.
David speaks the following languages: English (Native), French (Intermediate), German (Elementary).
David has at least 2 years of experience. During this time, David has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 1 year and 6 months. Note that David may not have shared all experience and actually has more experience.
Based on recent experience, David would be well-suited for roles such as: AI Trainer (NLP & LLM Evaluation), Senior Data Scientist, Machine Learning Researcher.
David's most recent position is AI Trainer (NLP & LLM Evaluation) at Freelance.
In recent years, David has worked for Freelance, Babban Gona, Hamoye AI Labs, and Future Oilfield Services Limited.
David is most experienced in industries like Energy, Information Technology, and Agriculture.
David is most experienced in business areas like Information Technology, Business Intelligence, and Project Management. David also has some experience in Research and Development and Quality Assurance.
David holds a Master in Multiphase Systems from Technical University of Munich / Politecnico di Torino / École des Mines de Saint Étienne and a Bachelor in Chemical Engineering from Obafemi Awolowo University.
David has 7 certificates. Among them, these include: ALX Data Science, DataCamp Data Analyst Professional, and DataCamp Data Engineer Associate.
The availability of David needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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