Product, Design, and Engineering were each an umbrella for a roster of narrower specialists. Click one of those three circles in any era to see the mosaic — and drag the slider to watch it consolidate.
Specialist rosters by era
Waterfall era (2000–2015): each of the three core areas was made up of narrower specialist roles that later consolidated.
Product specialists, Waterfall era
- Product Manager
- Product Owner
- Business Analyst
- Technical Product Manager
- Scrum Master
- Product Marketing Manager
- Agile Coach
- Product Ops
- Tech Writer
Design specialists, Waterfall era
- Visual Designer
- Interaction Designer
- Information Architect
- Content Designer
- Prototype Designer
- Graphic Designer
- Typography Designer
- Motion Designer
- Illustrator
- Storyteller
- Design Thinking Specialist
- UX Researcher
- Creative Director
Engineering specialists, Waterfall era
- Backend Developer
- Frontend Developer
- Systems Architect
- Engineering Manager
- QA Engineer
- Site Reliability Engineer
- Cybersecurity Engineer
- Data Scientist
- Database Engineer
- Release Engineer
- Quality Test Writer
- Technical Writer
- Database Architect
- Network Specialist
- Release Manager
By the pre-AI era, each area had consolidated to about four roles. By today, Product and Engineering each consolidate to one role — Product Manager and Full Stack Engineer — while Design keeps two: Product Designer and Brand Designer.
2000–2015 · Waterfall
Work moves in one direction. Product finishes a spec and hands it to design. Design finishes comps and hands them to engineering. The only shared moment is the handoff meeting itself — there's no space where all three roles work on the same thing at once.
~2015–2023 · Pre-AI
Each role still owns a lane, but the lanes touch. Design and engineering share a system. Product and engineering size the work together. Everyone shows up for research and ideation. The middle exists, but it's still the smaller part of the picture.
Today · AI-accelerated
AI drafts the first version of the spec, the screen, the code. What's left for each role alone shrinks down to judgment calls — strategy, taste, architecture. What used to be solo execution work is now something all three roles do together: directing, reviewing, and setting the guardrails the AI works inside.