Eli Mandel

Accountant. Developer. Founder.

I build bookkeeping software for the people who actually do the bookkeeping — and I do the bookkeeping too. 20 years of QuickBooks expertise, a Master's in Accounting, and four production applications built solo.

Founder, Zeno Services

MS Accounting Advanced QB ProAdvisor Full-Stack Developer 20 Years QuickBooks

Most accounting software is built by engineers who've never reconciled a bank statement. Most bookkeepers can't write a line of code. I've spent 20 years doing both.

I started in nonprofit accounting — running inBooks for years, directing Mesila Cleveland's financial empowerment program, and seeing firsthand how better financial tools change lives. Along the way, I helped grow Ocean Auto Glass from a single mobile operation to a multi-location business with a full team, building custom integrations that automated most of the back office.

Now I'm building the tools I wish existed: Zeno Services for real estate and construction bookkeeping, ZenoBudget for nonprofit cash flow, and Hierarchy Budget for personal finance. Every product comes from real experience solving real problems.


What I'm Building

ZenoBudget

Like Waze for your cash flow

Live

Real-time budget tracking for nonprofits. QuickBooks integration, cash flow forecasting, unlimited users. Starting at $249/month with white-glove onboarding.

Learn more

Zeno / ZenoRent

Your bookkeeper's brain, in software

Live

Bookkeeping operations platform for real estate & construction. Rental property management, contractor job costing, real estate development — with AI document processing and QuickBooks sync. Use our software, our bookkeepers, or both.

Learn more

Hierarchy Budget

See what you're really paying for

Live

Personal finance app mapping your spending to Maslow's Hierarchy of Needs. Free in your browser, $120/year for cloud storage and bank feeds.

Try it now

OAG-GB

Proof of concept at scale

Case Study

Custom integration connecting GlassBiller, QuickBooks Online, and OpenPhone for a multi-location auto glass operation. 2,000+ customers synced, nightly automated processing.


Credentials

Education

  • MS Accounting — Fairleigh Dickinson University, 2009
  • Nonprofit Accounting Certificate — Baruch College, 2009

Certifications

  • Advanced Certified QuickBooks ProAdvisor — Desktop (since 2010) & Online

Tech Stack

Python FastAPI React TypeScript PostgreSQL SQLAlchemy BigQuery ARIMA Tailwind Stripe Dokku

Experience

4 production applications 20 years QuickBooks experience Scaled a service business to 3 locations

Let's talk

[email protected]