Portfolio

Building Products That Scale

From high-throughput SaaS platforms to educational content that has reached over 300,000 learners worldwide

AI Rank Tracker

~350K LOC | 7K daily queries | Scales to 100K

Brands had no way to measure their visibility in AI-powered search engines. I built a production SaaS that tracks rankings across ChatGPT, Claude, Gemini, and Perplexity using a 3-stage pipeline. Currently processing 7K queries daily with capacity to scale to 100K.

PythonTypeScriptFastAPINext.jsPostgreSQLRedisGCP

brandvisibility.ai

More Projects

Vexpower

3+ years as CTO | $154K+ revenue generated

Traditional data education lacked hands-on practice. As CTO, I built and scaled an interactive simulation platform for learning data skills. Grew the platform from zero to $154K in revenue over 3+ years.

Next.jsFirebaseTerraformStripeAlgolia

vexpower.com

flowdiff

Semantic diff layer for code review. Transforms flat file diffs into ranked, semantically grouped review flows with flow graphs, review comments, and keyboard navigation. Built for AI agent PRs.

RustTypeScriptReactTauritree-sitter

github.com

tx

Open-source primitives for AI agent infrastructure. Gives developers headless building blocks for tasks, memory, and coordination without locking them into an opinionated framework. Ships five interfaces: CLI, MCP server, REST API, TypeScript SDK, and a monitoring dashboard.

TypeScriptEffect-TSSQLiteReactNext.jsMCP

github.com

CursorDevKit

Developers spend time configuring auth, payments, and databases for every new project. CursorDevKit is a production-ready, AI-powered boilerplate that handles this setup so you can start building features immediately.

Next.jsSupabaseTypeScriptTailwind

cursordevkit.com

Prompt Engineering Course (GitHub)

600+ stars | 300+ forks

Open source companion repository for the Udemy bestselling Prompt Engineering for AI course. Contains all code examples, notebooks, and exercises covering GPT, Claude, structured outputs, RAG, and production prompt patterns.

PythonLangChainOpenAIJupyterRAG

github.com

Python for SEO

161 stars | 37 forks

A 16-part free course demonstrating all of the different ways that you can use Python to improve your SEO processes. Covers web scraping, data manipulation, Google APIs, and automation.

PythonPandasJupyterBeautifulSoupAsyncio

github.com

Publications & Courses

Used by 300,000+ developers and marketers to build technical skills

O'Reilly BookJune 2024

Prompt Engineering for Generative AI

5,000+ copies sold | 4.4/5 Amazon rating

A practical guide to building with LLMs. Covers structured outputs, RAG architectures, and production prompt patterns.

Get the Book →

Leanpub Book2026

The Meta-Engineer: 10x Was the Floor

In-Progress

Building autonomous AI systems with Claude Code. Learn meta-engineering: orchestrating AI agents to build systems that build systems. Covers context engineering, verification patterns, and production harnesses.

Get the Book →

Udemy Bestseller2026

The Complete Prompt Engineering for AI Bootcamp

306,000+ learners | 4.5/5 stars | 125,000+ ratings

Learn practical coding skills for working professionally with AI, including GPT-5, Veo3, Midjourney, and GitHub Copilot. 24 hours of content with 237 lectures.

Start Learning →

Client Reviews

What Clients Say

More reviews on Google

Rhys Fisher

James has been a key measurement partner for a number of years. While running a boutique analytics agency, I would bring Just Understanding Data into a number of growth transformation projects at a time, across a portfolio of B2B SaaS and D2C E-commerce clients. These projects involved solving a diverse set of challenges. Together we worked on bespoke data collection solutions, applying machine learning models to marketing challenges, and surfacing often complex ideas into easy to digest actionables that clients could act on. James is well spoken and handles client communications well. His super power is being able to create a shared understanding around the insights drawn with analytics. Without James, you’ll be leaving growth on the table. 5* recommendation from me.

Shuaib Ahmed

James is literally a legend! I asked him to perform a web scraping task that was quite tedious revolving academic abstracts and he literally did it within a week after posting the gig. He also went above and beyond and gave me tips on applying NLP techniques which worked out quite well for my solution the month after. I would highly recommend working with him for any of your data collection needs or if you just need tips/help solving any Data Science issues!

Jeanne Keith Felipe

James is a very nice and professional person to do business with. He doesn't mind explaining technical information to give you a clearer picture of how online business works. He has a great work ethic and I'm sure Insight Jar will go far

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