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Krstoffr N.

Krstoffr N.

Senior Full Stack Engineer (AI & Automation Focus) — Data annotation & AI evaluation for computer vision and LLM workflo

United States Minor Outlying Islands flagPagadian, United States Minor Outlying Islands

Key Skills

Software

RoboflowRoboflow

Top Subject Matter

Computer vision object detection dataset preparation and AI output evaluation

Top Data Types

ImageImage

Top Task Types

Object DetectionObject Detection

Freelancer Overview

Senior Full Stack Engineer (AI & Automation Focus) — Data annotation & AI evaluation for computer vision and LLM workflo. Brings 11+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Roboflow. Education includes Bachelor's degree, National University of Singapore (2016). AI-training focus includes data types such as Image and labeling workflows including Object Detection.

Labeling Experience

Roboflow

Senior Full Stack Engineer (AI & Automation Focus) — Data annotation & AI evaluation for computer vision and LLM workflows

RoboflowRoboflowImageImageObject DetectionObject Detection

Managed data annotation and dataset preparation for YOLOv5/YOLOv8 object detection using computer vision workflows. Evaluated model outputs through iterative testing to improve precision and recall while addressing common failure cases such as false positives and false negatives. Reviewed AI-generated outputs to ensure guideline compliance and consistency for downstream use. • Annotated image data and prepared datasets using Roboflow. • Applied augmentation and class balancing to improve detection performance. • Debugged inference pipelines and optimized accuracy by targeting false positives/negatives. • Compared multiple model responses and selected optimal outputs based on evaluation guidelines.

2020 - 2026

Education

N

National University of Singapore

Bachelor's degree, Computer Science

Bachelor's degree
2016 - 2016

Work History

A

Apps Tanog United States

Senior Full Stack Engineer (AI & Automation)

Pagadian
2020 - 2026
N

Napse Global

Full Stack Engineer (Data & Automation)

Olivos
2018 - 2020