Stephen K.

Key Skills

Software

Appen

Clickworker

AWS SageMaker

Anno-Mage

Top Subject Matter

AI Engineer - Progamm

Software Engineer -Software Engineer & Development

Machine Learning Engineer - prompt & coding

Top Data Types

Image

Geospatial Tiled Imagery

Computer Code Programming

Top Task Types

Segmentation

Entity (NER) Classification

Classification

Polygon

Cuboid

Object Detection

Text Generation

Question Answering

Text Summarization

Freelancer Overview

Skilled in software engineering fundamentals including algorithms, system design, debugging, testing, database optimization, and scalable application architecture. Experienced collaborating on AI evaluation workflows, structured annotation projects, technical research, and model validation tasks requiring analytical thinking and precise written communication. Familiar with enterprise software systems, legacy system modernization concepts, API integration, and performance optimization techniques.

Labeling Experience

Senior Full-Stack / AI Engineer — Handshake AI | 2025–Present

Computer Code ProgrammingRLHF

• Designed and deployed scalable backend systems supporting AI model evaluation workflows and distributed processing • Built RESTful APIs and full-stack applications using Python, FastAPI, Next.js, PostgreSQL, and Redis • Improved API response performance and optimized backend throughput for real-time AI systems • Evaluated AI model outputs and contributed to prompt optimization and model reliability initiatives • Collaborated on data-intensive systems requiring analytical review, debugging, and structured feedback processes

2025 - Present

Full-Stack Software Engineer — Outlier AI | 2024–Present

Computer Code ProgrammingComputer Programming/Coding

• Developed internal dashboards and evaluation tools for AI model assessment workflows • Built scalable backend services and data pipelines for grading and annotation systems • Implemented caching and optimized data processing performance using SQL databases and asynchronous workflows • Worked on software evaluation tasks involving technical reasoning, debugging, and structured analysis • Contributed to AI training and validation projects requiring high attention to detail and technical accuracy

2024 - Present

Data Annotation and Data labeling_- Atlas Capture

VideoSegmentation

annotated 50k plus images for a retail shelf recognition using bounding boxes, polygons, and attribute tagging. achieved 98% accuracy via two-pass review weekly IAA sampling.

2025 - 2026

Software Engineer — Scale AI | 2023–2024

Computer Code ProgrammingPrompt + Response Writing (SFT)

• Engineered backend services and processing pipelines for large-scale AI data systems • Optimized workflows for distributed processing and improved system efficiency • Supported AI model training infrastructure and software evaluation initiatives • Collaborated with technical teams on debugging, system optimization, and infrastructure reliability

2023 - 2024

Machine Learning Engineer — IBM | 2022–2023

Computer Code ProgrammingPrompt + Response Writing (SFT)

• Developed and deployed NLP and machine learning applications in production environments • Built APIs and scalable services for model serving and real-time processing • Improved reliability and performance of AI pipelines through testing and optimization • Worked with structured datasets, analytics workflows, and cloud-based deployment systems

2022 - 2023

Education

Work History