R
Roster
Give recurring work a real owner.
Roster lets teams hire focused AI employees with a clear role, trusted company context, and permission to use real tools. Work ends in a finished deliverable, with human approval before important actions.
Software engineer · AI product builder
I build AI thatunderstandsthe work.
I'm Bobby Hall Jr, an engineer with 8 years of experience building full-stack products, agent systems, and engineering intelligence that turns complex context into useful outcomes.
Agent systems✦Engineering graphs✦Full-stack products✦AI infrastructure✦Product design✦Agent systems✦Engineering graphs✦Full-stack products✦AI infrastructure✦Product design✦
Selected work · 2026
Systems with a point of view.
Two products exploring the same question from different sides: how do we give AI enough context to do consequential work well?
Helix Engineering
Software should explain itself.
Helix connects code, decisions, incidents, ownership, and AI-generated changes into a living Engineering Graph, so teams can understand why software exists, what a change affects, and whether it is safe to ship.
Engineering approach
Build the product.Earn the trust.
I work across product, interface, data, and infrastructure. The throughline is simple: turn difficult systems into software people can understand and use.
Model the system, not just the prompt.
The best AI products understand relationships: the people, decisions, tools, and evidence around the task.
Make the work observable.
Useful autonomy needs clear milestones, durable state, and outputs a human can verify, not a mysterious spinner.
Keep judgment in the loop.
Systems should move fast on preparation while keeping consequential actions behind explicit human control.
Live from the DEV Community API
Notes from the build.
01
I Let Grok Bot Apply to Software Engineering Jobs While I Was Sleeping
At midnight, I gave Grok Bot a job. Not a prompt. A job. Find software engineering roles that...
02
Your Code Knows What Changed. But Does It Know Why?
AI can write a pull request in seconds. But when that pull request touches a piece of code written...
03
How to Build an AI Employee With a Knowledge Graph (Not Just Another Agent)
AI agents forget between runs. A graph of state, ownership, and events lets an AI employee wake, act, schedule, and continue work across days.
Have a hard system to untangle?
Let's build something that makes sense.
Start a conversationOpen to product engineering, AI systems, and ambitious collaborations.