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Nobuhle Nxumalo

@nobuhlenxumalo

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AI Tutor at xAI working on quality analysis, quality assurance, RLHF and SFT.

South Africa

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What I'm looking for

I’m eager to learn new skills and combine my knowledge across fields to support my professional trajectory. I’m open to various work and leadership approaches.

At xAI, I work as an AI Tutor, focusing on quality analysis and quality assurance, as well as RLHF and SFT.

Before that, I was an Advanced AI Data Trainer at Invisible Technologies, working on reinforcement learning from human feedback and supervised fine-tuning for LLMs and machine learning.

At AmpiFire, I worked as a Content Marketing Manager on growth hacking, product management, and SEO, B2B, and SaaS content for marketing and sales. I also worked as a freelance content writer and researcher for Arcon Research Group & Livingston Research, writing and editing academic, SEO, and B2B content.

At Oasis Water Botswana, I assisted with administration, payroll, and bookkeeping. I’m currently self-studying with ACCA and have completed its Certified Accounting Technician qualification, along with diplomas in accounting and business, sales management, marketing management, customer service, operations management, and international business.

Experience

Work history, roles, and key accomplishments

Current

AI Tutor

Current

xAI

Jan 2025 - Present (1 year 9 months)

Responsible for quality analysis and quality assurance, and involved in reinforcement learning from human feedback and supervised fine-tuning.

Quality Analysis Quality Assurance RLHF SFT

Advanced AI Data Trainer

Invisible Technologies

Jan 2024 - Jan 2025 (1 year)

Performed reinforcement learning from human feedback and supervised fine-tuning for LLM and ML models, along with quality analysis and assurance.

Reinforcement Learning Supervised FineTuning LLM Quality Analysis Quality Assurance

Content Marketing Manager

AmpiFire

Jan 2022 - Jan 2024 (2 years)

Managed content marketing, focusing on growth hacking and product management, and produced SEO, B2B, and SaaS content for marketing and sales.

Growth Hacking Product Management SEO B2B Content SaaS Content Marketing Sales

Freelance Content Writer/Researcher

Arcon Research Group & Livingston Research

Jan 2020 - Jan 2024 (4 years)

Wrote and edited academic, SEO, and B2B content across various subjects including sociology, finance, business, and management.

Writing Editing Academic Content SEO B2B Content Research

Administrative Assistant, Payroll Bookkeeper & Bookkeeper

Oasis Water Botswana

Jan 2016 - Jan 2019 (3 years)

Assisted with administrative tasks, payroll, and bookkeeping in the factory and main office.

Administration Payroll Bookkeeping

Education

Degrees, certifications, and relevant coursework

ACCA

Certified Accounting Technician (CAT) Qualification, Accounting

Activities and societies: Awards: Honors: 120 Hours of course work

Completed the Certified Accounting Technician (CAT) qualification and a Diploma in Accounting and Business, with a certificate in Audit and Financial Management.