Open to opportunities

Dennis User

@dennisuser14

Message

I build accessible React interfaces and improve AI-generated code for production readiness.

United States

Message

What I'm looking for

I'm looking to build accessible, production-ready frontend experiences and improve AI systems through rigorous code evaluation, QA, and technical collaboration.

I've built responsive, pixel-perfect frontend interfaces for Johnson & Johnson, North American Bancard, and Quadient using React, Next.js, TypeScript, and Tailwind CSS.

At Telus Digital, I evaluate and refine AI-generated frontend code, identify accessibility and syntax issues, and partner with ML engineers to improve instruction-following performance. I also established QA pipelines for annotation tool UIs aligned with WCAG 2.1 AA.

Across CrowdGen and Outlier, I've supported LLM training through data labeling, RLHF scoring, prompt evaluation, and quality feedback. I maintained 95%+ inter-annotator agreement at CrowdGen, increased team throughput by 22%, and onboarded 50+ contractors at Outlier.

I translate complex designs and technical requirements into clean, maintainable interfaces while strengthening quality, accessibility, and technical documentation.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer, Data Labeling

Current

CrowdGen

Jan 2025 - Present (1 year 7 months)

Coordinated complex data labeling for computer vision and LLM training, ensuring high accuracy in technical datasets. Maintained 95%+ inter-annotator agreement and QA pass rate through clear rubrics and feedback loops.

Data Annotation Computer Vision LLM Training QA Process Improvement

Current

Software Engineer, AI Operations

Current

Telus Digital

Jan 2025 - Present (1 year 7 months)

Evaluated and refined AI-generated frontend code, identifying syntax errors, accessibility issues, and edge cases in LLM outputs. Collaborated with ML engineers to debug annotation edge cases and improve model instruction-following performance.

JavaScript React TypeScript LLM Evaluation WCAG 2.1 AA Prompt Engineering

Current

Frontend Software Engineer

Current

Johnson & Johnson

Jan 2024 - Present (2 years 7 months)

Built and maintained responsive, pixel-perfect frontend interfaces using React, Next.js, and TypeScript. Established QA pipelines for UI implementations, achieving 95%+ pass rate in accessibility and quality.

React Next.js TypeScript QA Accessibility WCAG 2.1 AA

Software Engineer, AI Trainer

Outlier (Scale AI)

Jan 2024 - Jan 2025 (1 year)

Contributed to RLHF workflows by setting scoring criteria and ranking model responses. Reviewed and evaluated AI-generated outputs, focusing on factual accuracy, code quality, and structural integrity.

LLM Evaluation Data Annotation Team Management Onboarding

Frontend Software Engineer

North American Bancard

Jan 2022 - Jan 2024 (2 years)

Led end-to-end delivery of frontend development projects, managing resources, timelines, and stakeholder expectations. Enforced adherence to design systems and WCAG 2.1 AA accessibility standards.

Frontend Development Project Management Design Systems WCAG 2.1 AA

Frontend Software Engineer

Quadient

Jan 2019 - Jan 2022 (3 years)

Built and maintained multi-page websites and enterprise-grade web applications using React, Next.js, and Tailwind CSS. Translated Figma designs into pixel-perfect, responsive code meeting Core Web Vitals and accessibility standards.

React Next.js Tailwind Figma Accessibility