I am Oluwatosin Sanni, a dynamic and results-driven Machine Learning Operations professional with over 3 years of hands-on experience in ML workflows and Large Language Models (LLMs). I started as a Data Annotator and quickly grew into a Team Lead, bringing a strong foundation in customer success, operations, and a genuine commitment to excellence in AI environments. I excel at building and mentoring cross-functional teams of 20-25 members, optimizing annotation pipelines, and implementing rigorous quality control processes that deliver measurable outcomes. I thrive in collaborative settings with product managers and ML researchers to translate evolving model objectives into effective data annotation strategies, resulting in tangible improvements in model performance and reliability. I value curiosity, proactive communication, and a user-centered approach, and I am dedicated to advancing AI capabilities responsibly and effectively.

Oluwatosin Sanni

I am Oluwatosin Sanni, a dynamic and results-driven Machine Learning Operations professional with over 3 years of hands-on experience in ML workflows and Large Language Models (LLMs). I started as a Data Annotator and quickly grew into a Team Lead, bringing a strong foundation in customer success, operations, and a genuine commitment to excellence in AI environments. I excel at building and mentoring cross-functional teams of 20-25 members, optimizing annotation pipelines, and implementing rigorous quality control processes that deliver measurable outcomes. I thrive in collaborative settings with product managers and ML researchers to translate evolving model objectives into effective data annotation strategies, resulting in tangible improvements in model performance and reliability. I value curiosity, proactive communication, and a user-centered approach, and I am dedicated to advancing AI capabilities responsibly and effectively.

Available to hire

I am Oluwatosin Sanni, a dynamic and results-driven Machine Learning Operations professional with over 3 years of hands-on experience in ML workflows and Large Language Models (LLMs). I started as a Data Annotator and quickly grew into a Team Lead, bringing a strong foundation in customer success, operations, and a genuine commitment to excellence in AI environments.

I excel at building and mentoring cross-functional teams of 20-25 members, optimizing annotation pipelines, and implementing rigorous quality control processes that deliver measurable outcomes. I thrive in collaborative settings with product managers and ML researchers to translate evolving model objectives into effective data annotation strategies, resulting in tangible improvements in model performance and reliability. I value curiosity, proactive communication, and a user-centered approach, and I am dedicated to advancing AI capabilities responsibly and effectively.

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Language

English
Fluent

Work Experience

Team Lead – AI & Machine Learning (ML) at Hugo Technologies
May 1, 2024 - November 6, 2025
Led and managed a high-performing team of 20–25 AI professionals across ML development projects; Drove team productivity, morale, and accountability; Delivered high-quality labeled data sets for ML models; Collaborated with product managers and ML researchers to translate model objectives into data annotation strategies, contributing to a 15% improvement in model performance as measured by internal metrics.
Quality Assurance Auditor at Hugo AI & Machine Learning (LLM)
May 20, 2024 - May 20, 2024
Reviewed and validated annotated datasets across NLP tasks; Developed QA rubrics and standardized review workflows; Reduced review cycle time by 30% and improved consistency across large annotation tasks; Identified critical edge cases and contributed to an 18% boost in model precision during internal evaluations; Led coaching sessions with annotators to address inconsistencies.
Data Annotator at Hugo AI & Machine Learning (LLM)
May 20, 2024 - May 20, 2024
Executed high-volume, high-quality annotation tasks across text, image, and classification data to support training of Large Language Models in areas such as question answering, summarization, translation, sentiment classification, and dialogue generation. Maintained 97%+ annotation accuracy across over 15,000 benchmarks; Designed operational workflows to meet KPIs (>98% data accuracy, throughput gains, adherence to delivery timelines); Ensured compliance with evolving annotation guidelines and contributed to QA process improvements.
Customer Service Representative at Hugo Lagos CX Department
March 1, 2023 - March 1, 2023
Delivered front-line user support via chat, email and voice channels; resolved over 1,000+ support tickets while maintaining a 95% customer satisfaction rating; Acted as a key liaison between users and internal teams by identifying and escalating recurring customer pain points, contributing to early improvements in the design and usability of AI-driven customer-facing tools.
Customer Success Manager at Wexpo Events
August 1, 2022 - August 1, 2022
Drove customer success initiatives, aligning engagements with business goals and ensuring successful onboarding for AI-driven tools; built strong stakeholder relationships and contributed to product improvements through customer feedback.
Administrative Assistant at Newspaper
January 1, 2020 - January 1, 2020
Provided administrative support to ensure smooth office operations and assist with day-to-day tasks.

Education

BSc at Ahmadu Bello University
January 1, 2015 - January 1, 2019

Qualifications

ALX Virtual Assistant
January 11, 2030 - November 6, 2025
Augmented Reality / Virtual Reality Data Annotation Course
January 11, 2030 - November 6, 2025
Operational Subject Matter Expert (OSME)
January 11, 2030 - November 6, 2025
Task Stack
January 11, 2030 - November 6, 2025

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Education, Other