JPMorgan Chase
2013 – 2019
Lending / risk / core platforms
Key outcome 80%
less application-processing time
Product leadership / independent practice
Product leadership for systems that have to work.
Thirteen years inside consequential product systems. Still building new ones from zero.
Explore the workWadi Rum, Jordan
Photograph / Eugene Aarons
Institutional experience. Independent practice. New York / Selected work
01 Experience
Institutional
experience
Operating at scale.
Thirteen years at leading financial institutions, working across complex, regulated environments. From core finance to digital assets, where reliability, risk, and real-world impact matter.
Mastercard
2019 – 2021
Payments / issuer platforms / B2B
Platform scale 1,200+
issuers live
NYDIG
2021 – Sep 2026
Custody / institutional finance / markets
Peak custody $10B+
assets under custody, 100% cold storage
Stone Ridge
2021 – Sep 2026
Concurrent work across the parent organization
Concurrent scope Platform scope
No public metric
Concurrent scope / NYDIG + Stone Ridge · 2021 – Sep 2026
Different mandates. A consistent through-line:
product, scale, and real-world impact.
02 / Independent practice Selected work / 2026
Independent
practice
Products I design and implement,
from problem definition through
working software.
Featured system Hospitality × software
7 Spring
A real place. A connected platform.
My contributionProduct direction, design
& software implementation
Business × technology
The club is
the experience.
Software makes
it work.
Backgammon, hospitality, and a community in SoHo. Behind the room, one connected platform brings membership, payments, events, and staff workflows together.
The business
A place to play,
connect, and return.
The technology
Member journeys.
Coordinated operations.
The connection
Software built around
the people in the room.
Design × implementation
Both sides of the room.
Member journeys and staff workflows, designed as two views of one platform.
Product capture pending
01 / 03
Vercel · Expo Web & mobile surfaces
Render Two application services
Supabase Shared data & storage
Workflow recordings are in preparation. Pending sequences describe intended evidence, not completed product captures. Technology labels describe the reference inventory; exact deployment responsibilities remain to be verified.
Architecture × product judgment
One business.
Shared infrastructure.
Different experiences, distinct services, and connected business systems. The complexity belongs in the platform—not in the member’s experience.
3 Services
7 Business systems
10 Scheduled jobs
Connections verified against the production codebase and hosting, September 2026.
Inspect an experience, service, or integration
7 Spring System architecture Technology system / Architecture
One business. Different perspectives. Shared infrastructure.
A unified platform for 7 Spring’s member and operations experiences—connected to the systems that run the business, and built on shared infrastructure.
Members / Web selected View details
Follow a story
Experiences
One platform,
different perspectives.
Web and mobile are two projections of the same experience.
Members
Play · connect · belong
Operations
Manage · run · grow
Identity
Application services
Core business logic,
APIs, and background
jobs.
Connected
business systems
Payments, point of sale,
retail, and finance.
Grouped by the backend that owns them.
Platform services
Hosting, data, identity,
and mobile delivery.
01 / 03 — Business
Two focused products
Designed & built independently
MacLatch
A desktop problem. Solved from your phone.
Screen sharing and remote control for the moments when your Mac needs you — and you are somewhere else.
Product definition · Interaction design · Implementation
Visit MacLatch
Poppet Baby
Designed for the person using it at 3 a.m.
Quick logging, daily routines, and a warm visual system for the rhythms of caring for a baby.
Product design · Visual system · Implementation
Visit Poppet BabyOther work
Backgammon.com / Shop
Commerce around the physical game.
LiveMeet Gammon
Connecting players, venues, and games.
In developmentSpatial Scan
Spatial capture and property information.
Working title 04 Notes from the work
Notes from the work.
Ideas and principles behind the work. What I’ve learned, and how it changes the next decision.
22 Jan 2026
Product / reflection Working principles
Practice / judgment
Product / reflection
Lessons from a Decade in Fintech
From compliance screening to Bitcoin custody: what shipping financial products has taught me about friction, risk, and the systems between them.
Practice / judgment
A professional constitution
The principles I use to make decisions, work with other people, and stay close to the consequences of the work.
I’m Eugene Aarons, a product leader and independent builder based in New York. My work spans institutional financial products and software I design and implement from the ground up.
Tended Systems is the home for select consulting and product work. This site is a closer look at the practice behind it.