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Dumitru Filip

@dumitrufilip

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German-specialist data annotator and junior Flutter developer.

Romania

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What I'm looking for

I seek roles where I can combine German-language expertise, AI data work, and Flutter development—collaborative teams, clear processes, and opportunities to learn and contribute to production-ready products.

I am a German-specialist data annotator and junior Flutter developer with experience building and debugging mobile apps and creating high-quality training data for AI models.

I hold a bachelor’s program background in Applied Mathematics and Computer Science (German-language) and completed native-level German studies at college, including a DSD II (C1) language certificate.

In my current role as a Junior Software Engineer I improved Flutter app performance, implemented UI enhancements, and led development of a new app using Firebase and clean coding principles while leveraging AI tools to accelerate learning.

As a freelance annotator and AI training contributor, I delivered consistent, accurate annotations and structured responses for LLM training, collaborating remotely and applying strong attention to detail, problem-solving, and cross-functional communication.

Experience

Work history, roles, and key accomplishments

Current

AI Data Annotator

Current

Alignerr (via Labelbox)

Jan 2024 - Present (1 year 8 months)

Contributed high-quality data labeling for frontier AI models focusing on complex reasoning and language tasks, ensuring annotation consistency and multimodal data accuracy across remote teams.

Data Annotation Labelbox Quality Assurance Attention To Detail NLP Collaboration Remote Work

Current

Junior Flutter Developer

Current

Soltuions Crafted SRL

Jan 2024 - Present (1 year 8 months)

Debugged and resolved issues in Flutter applications improving performance and stability, implemented new features and UI enhancements, and led development of a new Flutter app using Firebase and clean coding practices.

Flutter Dart Firebase UI UX Debugging Clean Code Git CI CD

AI Training Contributor

Outlier AI

Jan 2023 - Jan 2024 (1 year)

Participated in creation of training data for large language models by producing structured responses and feedback to improve AI reasoning and linguistic accuracy across varied use cases.

Prompt Engineering LLMs)Data Curation NLP Quality Control Structured Responses Critical Thinking Git

Education

Degrees, certifications, and relevant coursework

Transilvania University of Brașov

Bachelor of Science, Applied Mathematics and Computer Science

2023 -

Pursuing a Bachelor's Degree in Applied Mathematics and Computer Science (German-language program) with coursework in Java, C++, SQL, OOP, data mining, and hardware projects using Arduino.