Marvellous K.

Key Skills

Software

Other

CrowdFlower

Top Subject Matter

Cybersecurity lab assessments

log analysis

and incident response documentation

Top Data Types

Image

Video

Audio

Text

Document

Top Task Types

Classification

Freelancer Overview

Cyber security Intern at Dexa (data labeling-like security assessment documentation). Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other and CrowdFlower. Education includes Diploma, Altschool Africa (2025) and Bachelor of Science, Mountain Top University (2021). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

Labeling Experience

Data Annotator | Atlas Capture (Freelance)

CrowdFlowerTextClassification

Executed regression testing and retesting of defects to validate fixes and confirm expected behavior across web and mobile application user flows. Conducted exploratory testing to uncover edge-case issues related to UI consistency, redirects, product categorization, and unexpected system behavior. Created detailed bug reports following Test IO standards using clear reproduction steps, expected vs actual results, and supporting evidence. • Collaborated in functional/usability/regression test cycles with global testers and adapted to varying project scopes. • Applied boundary value analysis and negative testing techniques to improve defect detection and coverage. • Identified and reported high-impact issues such as incorrect product filtering logic, inconsistent pricing behavior, and navigation issues. • Documented bugs with screenshots/videos and environment details to support downstream evaluation.

2026 - Present

Data Annotator | Uber AI

OtherTextClassification

Performed hands-on security assessments and structured lab reporting that required documenting findings from observations. Analyzed system/application logs to identify suspicious patterns and potential indicators of compromise. Supported simulated incident response activities by documenting detection, analysis, containment, and reporting outcomes. • Identified common vulnerabilities such as misconfigurations, weak authentication mechanisms, and exposed services. • Used Kali Linux reconnaissance tools (e.g., Nmap) to map attack surfaces and inform findings. • Conducted introductory web application security testing to validate observed issues (e.g., input validation problems, XSS/SQLi concepts). • Produced basic security reports with recommended mitigations based on lab results.

2025 - 2025

Education

Work History