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Ricardo SousaRS
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Ricardo Sousa

@ricardosousa1

Senior AI Data Workflows Specialist at Defined.ai who built a Python/SQL quality validation layer that reduced post-delivery defects by 35%.

Portugal
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At Defined.ai, I design data quality controls for enterprise pipelines, translating client and business requirements into testable standards, thresholds, and escalation paths. A reusable Python/SQL validation layer and SQLite-backed sampling system I designed reduced post-delivery defects by 35%.

I also design and maintain data clean-up and standardisation processes across 30+ locales, using Python, Unicode normalisation, regex, and Azure OpenAI. I partner with product and engineering teams to build governance into the platform and provide quality reporting through Power BI dashboards and SQL Server-backed reports.

Before Defined.ai, I managed longitudinal research datasets at Phonetics and Phonology and Lisbon Baby Lab, from collection and curation through analysis and archiving. My research in Linguistics grounded my work in experimental design, sampling, inter-rater reliability, and statistical inference.

Experience

Work history, roles, and key accomplishments

Defined.ai logoDE
Current

Senior AI Data Workflows Specialist

Mar 2026 - Present (7 months)

• Design and implement the data quality control framework applied across enterprise data pipelines: defining acceptance criteria, thresholds and escalation paths per delivery, leading root-cause analysis on quality incidents, and implementing preventive controls upstream with the relevant owners.

• Define data quality KPIs and quality expectations jointly with client-facing teams, converting comm

Defined.ai logoDE

Senior Data Quality Specialist

Mar 2025 - Mar 2026 (1 year)

• Designed and implemented the data quality control framework applied across enterprise data pipelines: defining acceptance criteria, thresholds and escalation paths per delivery, leading root-cause analysis on quality incidents, and implementing preventive controls upstream with the relevant owners.

• Defined data quality KPIs and quality expectations jointly with client-facing teams, converting

Defined.ai logoDE

Data Quality Specialist

Mar 2024 - Mar 2025 (1 year)

• Automated recurring data preparation and validation with Python and SQL, cutting turnaround time on routine checks by over 80% and removing a manual bottleneck for internal teams and partners.

• Built and iterated Power BI reporting (data model, DAX, refresh strategy) giving visibility on delivery status and quality trends across several active projects.

Defined.ai logoDE

Associate Data Quality Specialist

Aug 2023 - Mar 2024 (7 months)

• Executed QA and validation across multilingual and structured datasets, consistently meeting and exceeding client-mandated accuracy thresholds on audited deliveries.

• Authored validation rules, edge-case and decision-log documentation, improving reproducibility and shortening onboarding.

• Worked with project leads to refine quality criteria and escalate high-impact issues, contributing to th

Defined.ai logoDE

Data Quality Intern

Apr 2023 - Aug 2023 (4 months)

Worked as Data Quality Intern at Defined.ai.

Phonetics and Phonology and Lisbon Baby Lab logoPL

Researcher

Jan 2018 - Mar 2023 (5 years 2 months)

• Managed longitudinal research datasets end to end across concurrent child development studies (collection, curation, coding and archiving), enforcing consistency, versioning and traceability from raw capture to published analysis.

• Defined and documented data collection and annotation protocols adopted lab-wide, and measured inter-rater reliability between coders to validate that data from dif

Education

Degrees, certifications, and relevant coursework

IB

IBM

Introduction to Data Analytics

Aug 2026

AN

Anthropic

Claude Code in Action

Oct 2026

UD

Udemy

Data Governance Fundamentals

Mar 2025

UD

Udemy

Microsoft Power BI: PL-300 Certification Prep (Data Analyst)

Mar 2025

UD

Udemy

Data Warehouse ETL Testing & Data Quality Management

Jul 2024

UD

Udemy

A practical guide to building Dashboards with Power BI

Dec 2023

UD

Udemy

Understanding the potential of Microsoft Fabric

Dec 2023

FL

Faculdade de Letras da Universidade de Lisboa

Mestrado, Linguística

2019 - 2022

Final Grade: 18/20

PN

Plataforma NAU

RGPD para Cidadãos Atentos

2021

PN

Plataforma NAU

O Essencial da Gestão de Dados de Investigação

2021

SB

Science Beam

Online course on "Deep Dive into ERPs Technique", Neuroscience

2021 - 2021

ES

EF Standard English Test (EF SET)

EF SET English Certificate 88/100 (C2 Proficient)

Apr 2021

IM

Instituto de Medicina Molecular

Workshop de Introdução à Plataforma Estatística R, Estatística

2020 - 2020

NU

Northern Arizona University

Workshop on Quantitative Linguistics Methods (WQLM), Estatística

2020 - 2020

HU

Heriot-Watt University

EEG and Language Crash Course, EEG, Linguistics, Neuroscience

2019 - 2019

FL

Faculdade de Ciências da Universidade de Lisboa

Short course on functional magnetic resonance imaging (fMRI), Mind-Brain College

2019 - 2019

FL

Faculdade de Letras da Universidade de Lisboa

Licenciatura, Linguística

2015 - 2019

FL

Faculdade de Letras da Universidade de Lisboa

Workshop on Linguistics, Language Development and Impairment IX, Linguística

2019 - 2019

FL

Faculdade de Letras da Universidade de Lisboa

Workshop on Linguistics, Language Development and Impairment VIII, Linguística

2018 - 2018

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