Sebastian J.

Key Skills

Software

Appen

OneForma

Remotasks

Telus

Internal/Proprietary Tooling

Scale AI

Other

iMerit

Top Subject Matter

Search and online ads relevance evaluation

AI prompt engineering

PII labeling for AI datasets (Swedish/English)

Top Data Types

Audio

Image

Text

Document

Top Task Types

Bounding Box

Evaluation/Rating

Prompt + Response Writing (SFT)

Segmentation

Translation/Localization

Entity (NER) Classification

Transcription

Data Collection

Text Generation

Classification

Freelancer Overview

Brings 20+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include LLM, Translation services and QA work. Education includes Higher Vocational Education, Luleå University of Technology (2019) and Higher Vocational Education, Yrkeshögskolan Kungsbacka (2014). AI-training focus includes data types such as Text, Audio, and Image and labeling workflows including Evaluation, Rating, and Prompt + Response Writing (SFT).

Labeling Experience

Swedish Gen AI Language Specialist (iMerit Tech Services)

iMeritTextData Collection

Performed high-quality text, image, and video annotations in accordance with strict project guidelines. Applied critical thinking to ambiguous cases to ensure labeling accuracy and reliable dataset outputs. Collaborated with language, project, and technical teams to maintain quality standards and improve workflow efficiency. • Annotated text, images, and video per guidelines • Resolved ambiguous labeling cases • Reported tool issues to support quality • Improved workflow through team collaboration

2025 - Present

English to Swedish Translator (Cactus Communications)

OtherText

Provided freelance English-to-Swedish translation services including reviewing and refining text, translations, and captions. Transcribed conversations and performed quality checks on labeled or annotated voice, text, and image content. Reviewed and corrected AI-generated outputs and supported localization for AI model content. • Translated and refined text/captions • Transcribed conversations for quality workflows • Annotated/labelled voice/text/image content • Corrected AI-generated translations for localization

2025 - Present

Bilingual Quality Control Specialist (OneForma)

OneFormaText

Ensured quality and consistency of bilingual text scripts and associated audio recordings for Swedish (Sweden) and English (US). Verified that content matched linguistic expectations and maintained uniformity across languages. Supported dataset and content quality for bilingual AI or transcription-related workflows. • Checked bilingual script consistency • Reviewed quality of audio recordings • Ensured Swedish/English alignment • Validated adherence to quality standards

2026 - 2026

Data Evaluator (Appen/CrowdGen)

AppenTextData Collection

Evaluated interactions between a person (user) and a voice assistant to support dataset development. Assessed interaction quality according to task instructions to ensure consistent evaluation. Contributed to improvements in voice assistant behavior by providing structured feedback. • Evaluated person-to-voice-assistant interactions • Applied project guidelines to interaction quality • Produced structured feedback for dataset use • Supported improvements to voice assistant systems

2025 - 2026

Swedish Content Creator (DataForce/Transperfect)

OtherTextText Generation

Created written content such as SMS threads, email chains, and paragraph-level prose while following a specified tone and word-count guidelines. Produced content according to structured requirements for downstream AI data usage. Maintained adherence to formatting and topic constraints provided by the project. • Wrote SMS/email thread style content • Produced paragraph-level prose per topic • Followed tone and word-count constraints • Complied with structured guideline requirements

2025 - 2025

Show more

Education

Work History