The result: more margin, less overhead.
A decade turning operational bottlenecks into technology. At every company (real estate, health-tech, programmatic advertising), I find what's manual, build the tools to automate it, and scale the team around it.
Two-sided AdTech platform: consumer ordering plus advertiser activation, built end-to-end. 15-person startup, $3.6M–6M ARR. Hired every team member, built the technology, ran the P&L, and grew the client base from zero to 200+ simultaneous accounts at 85% retention with zero long-term contracts.
Consumer side grew 2,000 to 200,000 monthly users in 11 months. Advertiser side ran on a CDP with 21M+ profiles and 6 DSP activation paths, including activation by a major DSP partner for pharmaceutical advertiser campaigns.
Programmatic advertising platform, ~125 employees. Managed up to $1.2M/month in ad spend across 6 DSPs (The Trade Desk, DV360, Yahoo, Xandr, YouTube, Viant), ranked top 2 in profitability out of 22 account managers, and built 4 automation tools adopted department-wide, making the team 60x faster on reporting.
Built a CTV measurement framework for Thomas J. Henry that cut time-to-signup by 5–7 days, handed off to Causal IQ at departure and still in use. Grew Floor & Decor from $10K to $250K/month (25x).
Built the interactive learning platform Stanford's BIOE 230 course runs on: 180 modules, a contextual AI tutor, and 960 practice problems. ~100K lines. Built in 24 hours.
A cross-section of accounts across regulated industries, Fortune 500 brands, national franchises, and political campaigns, managed, activated, or measured directly.
Code and dashboards are tools, not the job. The job is finding what's manual before it becomes the reason growth stalls, then building the thing that kills it.
I've run that pattern at three companies that had nothing in common except the problem: real estate, health-tech, programmatic advertising. Build the platform. Automate the operation. Fund what's next. I hire the team, write the code, and own the P&L that proves it worked.
AI runs underneath the daily work here. Three production uses, each producing something concrete.
Claude Code, Codex, Cursor, and Copilot in rotation. Used to build the entire ~950K-line Confidential AdTech Startup platform and every project in the R&D lab.
Vercel AI SDK + Gemini powering the Stanford BIOE 230 contextual tutor. Real users, real prompts, real evaluation.
MCP-driven sales prospecting workflows at the Confidential AdTech Startup: automated account enrichment, outreach generation, and pipeline triage.
Adoption, continuity, and performance facts from the work itself, stated plainly, with a source for each. Not testimonials, not invented quotes.
Built the interactive learning platform Stanford's BIOE 230 course runs on: 180 modules, a contextual AI tutor, and 960 practice problems, built in 24 hours.
The CTV measurement framework built for Thomas J. Henry was handed off to Causal IQ at departure and continued serving the broader client book.
Floor & Decor. Grew programmatic ad spend from ~$10K to $250K monthly (25x) by pitching strategic media recommendations layered with native and display.
Thomas J. Henry. Expanded CTV budget by stacking CTV under display, justified through the custom CTV measurement framework above.
Ranked top 2 in profitability across a 22-person Account Operations team, on performance discipline, optimization judgment, and client communication.
Made AI-assisted development (Claude Code, Codex, Cursor, and Copilot) the team-wide operating standard across a 15-person engineering and operations organization.
Direct recommendations from past managers, clients, and colleagues available on request. LinkedIn recommendations at linkedin.com/in/stephenumunna.
Technical proving grounds where architecture patterns get stress-tested before going into production work. Healthcare data, finance, sports analytics, education: each one pushed a different skill that made the next company better.
Rates every US ZIP code 0–100 for healthcare access. 4M+ providers, E2SFCA spatial scoring.
AI-powered personal finance for first-generation wealth builders.
Live scores, player comparisons, shot charts. Built in 3 days. $0/month.
Exploring leadership roles where building the technology and running the business aren't treated as separate jobs.
