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Lester Howard

Lester Howard

Senior Software Engineer - Web and Mobile Applications

COSTA_RICA flag
Alajuela, Costa Rica
$30.00/hrIntermediateAws Sagemaker

Key Skills

Software

AWS SageMakerAWS SageMaker

Top Subject Matter

No subject matter listed

Top Data Types

Computer Code ProgrammingComputer Code Programming

Top Label Types

Computer Programming Coding

Freelancer Overview

I have hands-on experience in AI training data and data annotation, particularly through my role as an LLM Trainer where I evaluated and validated AI-generated code, architectures, and implementation steps. My strong technical background as a senior software engineer allows me to provide detailed, context-rich feedback to AI systems, ensuring high-quality and functionally correct outputs. I am skilled in reviewing and improving logic, flows, and integrations, with a focus on catching errors and inconsistencies that impact data quality. My expertise spans full-stack development, cloud-based architectures, and advanced data flows, and I am comfortable working with a variety of tools and technologies including JavaScript, Node.js, React, SQL/NoSQL databases, and AWS. I bring a detail-oriented approach to data labeling and annotation, leveraging my experience in both software engineering and AI model training to deliver reliable, accurate results.

IntermediateEnglishSpanish

Labeling Experience

LLM Training

Don T DiscloseComputer Code ProgrammingComputer Programming Coding
* Evaluated and validated AI-generated code, architectures, and implementation steps by executing applications locally, identifying errors, inconsistencies, and edge cases, and guiding corrective iterations * Provided precise, context-rich technical instructions to an AI system, leveraging prior full-stack experience to guide models behavior and improve output quality * Ensured high-quality outcomes by reviewing AI-generated logic, flows, and integrations with strong attention to detail, validating functional correctness rather than accepting outputs at face value

* Evaluated and validated AI-generated code, architectures, and implementation steps by executing applications locally, identifying errors, inconsistencies, and edge cases, and guiding corrective iterations * Provided precise, context-rich technical instructions to an AI system, leveraging prior full-stack experience to guide models behavior and improve output quality * Ensured high-quality outcomes by reviewing AI-generated logic, flows, and integrations with strong attention to detail, validating functional correctness rather than accepting outputs at face value

2025

Education

U

Universidad Fidélitas

Bachelor of Science, Software Engineering

Bachelor of Science
2020 - 2025
U

Universidad Creative

Certificate in Web Development, Web Development

Certificate in Web Development
2021 - 2022

Work History

I

iDo Agency

Senior Software Engineer

San José
2021 - Present