Profile

Háron de Oliveira de Souza

AI and Trust & Safety Operations Specialist | Process and Model Optimization

LOCATION: Dublin, Ireland

STATUS: Eligible for full-time work in Ireland

Education

BSc in Social Communication (Advertising & Marketing)
Salvador University (UNIFACS), Brazil | 2014 - 2018

Certificates

Graphic & Web Design | Prepara Course, Brazil | 2018
Film Directing & Video Editing | Cinearts Film Institution, Brazil | 2017 - 2018

Languages
Brazilian Portuguese: Native English: Fluent
Professional Summary

Bilingual (English and Portuguese) Data, Trust & Safety, and AI Operations specialist with over 5 years of experience in data labeling, model optimization, content moderation, quality assurance, and policy compliance within global technology environments.

Proven track record supporting machine learning performance and platform integrity through high-precision annotation, root cause analysis, workflow optimization, and SOP development. Experienced collaborating cross-functionally with Product, Engineering, and Operations teams to improve review quality, operational efficiency, and decision accuracy in SLA-driven environments.

Detail-oriented and adaptable professional with strong analytical judgment, technical problem-solving skills, and the ability to perform effectively in high-pressure, ambiguity-driven settings.

Core Competencies
AI, Data & Model Operations
Data Analysis & Operational Reporting RCA & Quality Monitoring Multi-Modal Annotation LLM Training Model Performance Analysis Misclassification Review
Trust & Safety & Policy Governance
Compliance & Risk Mitigation Sensitive Content Review SOP Development Process Standardization Policy Enforcement Escalation Management Digital Rights Ops
Operational Excellence
Quality Improvement Initiatives Workflow Management Queue Optimization Stakeholder Coordination Vendor Coordination KPI Tracking
Technical & Creative Enablement
Technical Troubleshooting Graphic & Web Design JavaScript Workflow Scripting Video Editing Process Automation
Tools & Technologies
Ops & QA
Jira Trello TestRail Custom Moderation Platforms
Data
SQL (Basic to Intermediate) Google Sheets Microsoft Excel Microsoft Project
Web
HTML WordPress
Creative
Adobe Photoshop Illustrator Premiere Pro After Effects CapCut Filmora AI Image Generation & Custom Model Training Platforms
Professional Experience
Data Labeling Analyst | Meta (via Morgan McKinley)

Dublin, Ireland | Jan 2025 - Present

  • Label and analyze large-scale datasets to support AI model development and platform integrity initiatives.
  • Train and calibrate Large Language Models (LLMs), correcting misclassifications and refining annotation guidelines to improve model behavior.
  • Identify edge cases and systemic labeling inconsistencies, escalating structural issues impacting model performance and review quality.
  • Collaborate with Product, Engineering, and Trust & Safety teams to translate operational findings into workflow and model improvements.
  • Deliver high-precision outputs under strict quality and turnaround targets in performance-driven environments.
  • Designed and implemented a lightweight JavaScript bookmarklet tool to enhance URL and domain verification, improving review accuracy and reducing average handling time through workflow automation.
Data Understanding Specialist | TikTok

Dublin, Ireland | Jan 2024 - Jan 2025

  • Managed high-priority seasonal and Tier 3 operational queues in ambiguity-driven environments.
  • Conducted Root Cause Analysis (RCA) to diagnose model performance drops and operational inconsistencies.
  • Partnered with Product Management and R&D to refine labeling frameworks and improve AI model outputs.
  • Developed and maintained SOPs for complex and seasonal workflows, improving clarity, governance, and labeling consistency.
  • Led weekly escalation and policy alignment sessions with cross-functional stakeholders.
  • Consolidated 12 concurrent operational queues into 8 optimized workflows, reducing structural overlap and improving seasonal project governance and performance tracking.
Model Optimization Specialist | TikTok

Dublin, Ireland | Apr 2022 - Jan 2024

  • Ensured advertising content compliance through detailed application of ads review policies and integrity standards.
  • Labeled and classified multimedia ad content aligned with machine learning training requirements.
  • Analyzed dashboards and operational reports to identify trends and inform model optimization strategies.
  • Coordinated cross-functional investigations and managed escalated operational issues impacting monetization integrity.
Digital Rights Operations Agent | Meta (via Accenture)

Dublin, Ireland | Jul 2021 - Apr 2022

  • Investigated flagged online content to ensure compliance with platform policies and regulatory standards.
  • Managed urgent and sensitive escalations involving high-risk content categories.
  • Identified behavioral patterns and suspicious activity trends to support enforcement decisions.
  • Collaborated with global stakeholders on complex integrity cases.
Game Quality Assurance (LQA & FQA) | Keywords Studios

Dublin, Ireland | Jun 2019 - Jul 2021

  • Performed linguistic and functional QA on AAA game titles, ensuring localization accuracy and platform compliance.
  • Logged and tracked defects using JIRA and TestRail while collaborating with development teams to resolve issues.
Credited AAA Game Titles
Assassin’s Creed Discovery Tour: Ancient Greece Dreams (PS4) by Sony Interactive Entertainment A Total War Saga: Troy Resident Evil Village Ratchet & Clank: Rift Apart Lemnis Gate Ghost of Tsushima: Director’s Cut
Earlier Experience

Social Media Manager (Self-Employed)

Brazil | 2018

Graphic Designer & Social Media Manager | UP Media

Brazil | 2018

Sales Development Representative | WebFoco Telecom

Brazil | 2016 - 2018

Outbound Call Center Agent | Contax Contact Center

Brazil | 2014 - 2016