Open to opportunities

Johnathan A Cobb

@johnathanacobb

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Practical AI software engineer building reliable production ML systems and applied LLM solutions.

United States

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What I'm looking for

I seek roles building production AI/ML systems where I can improve model reliability, data quality, and safety, collaborating across product and engineering teams to ship practical, well-tested features.

I am a software engineer and applied ML practitioner with a decade of experience building production-ready AI systems across computer vision, audio, and NLP. I turn research ideas into dependable pipelines and tools, focusing on data quality, model evaluation, and practical deployment using Python and C++ with PyTorch/TensorFlow, Kafka/GStreamer, and AWS.

At Outlier AI and Scale AI I designed prompt workflows, evaluation rubrics, and labeling standards to improve model safety and training data quality; earlier roles strengthened my full-stack engineering habits and product-centered delivery. I enjoy implementing guardrails, creating repeatable experiments, and shipping reliable features that make AI systems stable and useful in real-world settings.

Experience

Work history, roles, and key accomplishments

AI Software Engineer

Outlier AI

Aug 2022 - Dec 2025 (3 years 4 months)

Developed prompt workflows and evaluation systems to keep LLM responses consistent and safe, reduced labeling disagreement through clear rubrics, and implemented tests to catch instruction conflicts and jailbreaks early.

Prompt Engineering Quality Systems RAG

Machine Learning Engineer

Scale AI

May 2017 - Aug 2022 (5 years 3 months)

Led data-quality and labeling initiatives to produce reliable training datasets, designed sampling and review processes balancing speed and accuracy, and produced repeatable evaluation summaries for stakeholders.

Data Labeling Model Evaluation Machine Learning

Junior Software Developer

MJH Life Sciences

Nov 2014 - Feb 2017 (2 years 3 months)

Built and maintained web features and backend services for healthcare content publishing with a focus on performance, accessibility, and editor usability, delivering tested changes in collaboration with editorial teams.

JavaScript TypeScript React HTML CSS Backend Services Accessibility

Software Engineering Intern

Salesforce

Aug 2013 - Oct 2014 (1 year 2 months)

Contributed features and fixes to internal web apps and backend tools, adopted production practices like code reviews and testing, and participated in sprint planning and debugging.