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Marek Dobes

@marekdobes

Oracle APEX / PL-SQL Developer at BBM s.r.o., building database-driven business applications and annotating datasets for language models.

Czechia

Message

At BBM s.r.o., I design and develop responsive, database-driven business applications using Oracle APEX. I write SQL and PL/SQL procedures and optimize queries and data structures for performance and reliability.

At Hexagon (Melowntech), I annotated and quality-reviewed nuanced datasets for training and evaluating language models. I followed detailed guidelines and resolved ambiguous or edge-case content to support dataset consistency.

At TELUS International, I labeled and classified training data for large language models and generative AI systems. My work included named entities, sentiment, sensitive content, and anonymizing personal data.

Earlier, at Bohemia Interactive Studio s.r.o., I performed acceptance and exploratory testing for real-time simulation systems and contributed to QA documentation. I hold a Master's degree in Informatics and Statistics from the University of Economics, Prague.

Experience

Work history, roles, and key accomplishments

Current

Oracle APEX / PL-SQL Developer

Current

BBM s.r.o.

Feb 2018 - Present (8 years 8 months)

Design and develop responsive, database-driven business applications using Oracle APEX. Write advanced SQL and PL/SQL procedures, optimizing queries and data structures for performance and reliability.

Oracle APEX Pl SQL SQL Database Optimization Jasper Reports Power BI Tableau Technical Documentation

LLM Data Annotation Specialist

Hexagon (Melowntech)

Feb 2024 - Jun 2026 (2 years 4 months)

Annotated and quality-reviewed complex, nuanced datasets used to train and evaluate language models. Applied critical thinking to resolve ambiguous or edge-case content, improving overall dataset consistency.

Data Annotation LLM Evaluation Quality Assurance Critical Thinking Generative AI

AI Data Labeling Analyst

TELUS International

Nov 2022 - Sep 2025 (2 years 10 months)

Delivered high-quality annotations and classifications for training datasets used in large language models and other generative AI systems. Labeled linguistic and contextual elements, including named entities, sentiment, and sensitive content, following strict client guidelines.

Data Annotation LLM Training Data Named Entity Recognition PII Detection Data Quality Assurance Content Moderation Classification

Junior SW Tester and QA Analyst

Bohemia Interactive Studio s.r.o.

Jul 2017 - Sep 2018 (1 year 2 months)

Performed acceptance and exploratory testing for real-time simulation systems, identifying and logging defects prior to release. Contributed to QA documentation and supported product validation activities alongside development teams.

QA Software Testing Exploratory testing Defect Tracking Documentation

Education

Degrees, certifications, and relevant coursework

University of Economics, Prague

Ing. (M.Sc. equivalent), Informatics and Statistics

2019 - 2021

Pursued a Master's degree in Informatics and Statistics, focusing on software development, data analysis, database management, and software quality assurance.