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Design
Portfolio

A decade of designing complex systems —
from healthcare to fintech to AI

→
Earlier
FSharp, Sharecare
Advertising · Healthcare

Navigating the complexities of major hospital systems

2018
SingleStore
Data infrastructure

Cloud database platform MVP → GA, owned the design system

2022
Carta
Workflows → Agentic AI

Agentic ERP for private capital, AI-native workflows

Fund Accounting

A multi-entity, general-ledger workbook — the deep dive ahead

Visual Accounting

The second act — where the ledger goes next

01 / 02
01Fund AccountingStatements made easier to view and manipulate — every number traceableCarta
0213F.LIVEInstitutional filings, made readableSolo project
Carta

Fund Accounting

Help fund accountants maintain records and prepare financial statements.

Fund accounting illustration — statements, controls, deadlines, banking
The problem

Financial statements are static — users demand flexibility

Custom structure, richer categorization, tables they can manipulate their own way.

Customizable structure

Sub charts of accounts — statements shaped per firm.

Before
Standard setup
1000 · Bank 1100 · Investments 2100 · Accruals 3000 · Equity
applied to every fund — unchanged
Every customer
Venture Fund I
Growth Fund II
SPV III

The same chart of accounts for everyone — no firm-specific structure.

After — live

Custom reporting tags

Tag the ledger — department, location, vendor, event.

First pass
Refined — live

Connected views

One linked surface across every statement.

Before
Balance sheet
✕
Trial balance
✕
Journals

Every statement is its own page — context resets on every hop.

Rethinking the relationship between statements
Journal entries
organized by account
General ledger
Cash
Revenue
Expenses
Equity
each account’s balance
Trial balance
subsets of accounts, regrouped
Statements
Balance sheet
Statement of operations
Cash flow

Largely the same data — organized at different levels of abstraction.

After — live

Customizable views

Pivot power without the pivot.

BeforePivot tables in Excel — dense workbook, complexity included
After — live
The requirement

The more the statements could do, the more they had to be trusted

every number must explain itself.

Users ask
can I see the Excel formula?
who entered the value?
how did this result in that?
how did Carta calculate that?

Tracing precedents and dependents in Excel

Excel is the benchmark

Users trust what they can interrogate

Explaining numbers burns hours

Every team pays this tax

Transparency over simplicity

Experts triple-verify — trust lives in the trail

Tracebacks inside the workbook

Every number opens; provenance becomes navigation.

Workbook — traceback openWorkbook with traceback open
Drill-in explorationTraceback drill-in exploration

Tracebacks answer one question: “How did Carta arrive at this number?”

Trigger & container

How a Traceback opens, and where it lives.

Trigger
Any number can carry a Traceback — hover the live row
Default$1,250,000.00
Hover$1,250,000.00
Selected$1,250,000.00
Live$1,250,000.00
Distributions✕
$1,250,000.00
Calculated Value
This value is automatically calculated by the system
Container
Floating Tile or Slider — as deployed
1100Investment✕
$2,499,997.66
= Total debits$3,120,440.18 − Total credits$620,442.52
Journal entriesMost recentHighest amount
DateEvent typeDebitCredit
12/28/2025Valuation$599,999.44—
12/17/2025Contribution$1,200,000.00—
11/30/2025Mgmt fee—$320,442.52
View all journals →

Traceback content

Content varies with available data and links onward to other Traceback values, documents, and pages.

Constants
Carried Interest Percentage✕
20.00 %
Name
Carried Interest Percentage
Constant Value
This value is a constant specified during entity setup
Calculations
Gross management fee✕
$525,000.00
= Committed
capital$105,000,000.00 × Annual
fee rate2.00 % ÷ Quarters
per year4
DescriptionMetadataAccess History
Name
Gross management fee
Description
This value is automatically calculated by the system
Ledger previews
Contributions✕
DatePartnerAmount
12/17/2025Meridian Holdings LP$5,000,000.00
12/17/2025Northgate Family Trust$2,500,000.00
12/17/2025Solomon Ventures II$7,500,000.00
View ledger →

Interaction behavior

Selecting an Inspect link in a Traceback initiates a breadcrumb in the title area.

Net management fee✕
$487,500.00
= Gross mgmt fee
Q4 2025$525,000.00 − Fee
offsets$37,500.00
DescriptionMetadataAccess History
Selecting an Inspect link…
→
Back/Fee offsets✕
$37,500.00
= Mgmt fee
rebates$25,000.00 + Expense
waivers$12,500.00
DescriptionMetadataAccess History
…initiates a breadcrumb in the title area…
→
Back/Mgmt fee rebates✕
DateMemoAmount
10/31/2025Q3 placement fee rebate$12,500.00
12/31/2025Q4 placement fee rebate$12,500.00
View the complete source →
…and a deeper drill reaches the source entries

Content densities

Density without compromising clarity — the pattern scales from cards to tables to spreadsheets.

Card
Total Fund TVPI
1.1082×
Total value to paid-in capital
Table
MetricLP onlyTotal fund
Beginning balance1.11×1.1082×
Distributions0.32×0.3287×
Syndication costs3.09%3.07%
Spreadsheet
A
B
C
1
Partner
Commitment
Capital balance
2
Meridian LP
$1,200,000
$1,148,300
3
Northgate
$940,500
$328,922
4
Solomon II
$410,000
$392,610
5
Capital balance — Northgate✕
$328,922.00
Recorded Value
Updates to this value are provided by authorized users
High engagement & adoption

150+ customers adopted custom tags — far more use the new statements

Happy strategic clients

Strong reception from upmarket funds

Support tickets down 67%

Remaining requests arrive with far better context

Faster investigations

Support resolved more issues without engineers

Solo Project

13F.LIVE

A better way to track institutional holdings — designed, engineered, and shipped solo.

Isometric blueprint illustration for 13F.LIVE

13F filings are hard to read

SEC EDGAR — direct

Free and complete, but a 1990s table of CUSIPs

13F.INFO

Friendlier — still the same raw table

01 / 02
Raw SEC EDGAR 13F filing
13f.info filing table

Not all data is born equal

“Chief among them is timing. The information is weeks out of date by the time it’s made public…”
“Things get even murkier when it comes to options.”
— Bloomberg
Why Investors Should Beware 13F Filings

Two audiences, one interface.

Experienced investor persona
Persona 01

Experienced Investors

ProfileSeasoned investor who analyzes 13F data to discover hidden opportunities and validate a thesis
NeedsData depth, accuracy, and advanced data manipulation for in-depth exploration
Novice investor persona
Persona 02

Novice Investors

ProfileGrowth-minded investor who wants to learn from top investors but can get overwhelmed by complexity
NeedsSimple, visual, easy-to-understand insights that highlight what matters most
Novice investor portrait Experienced investor portrait
NoviceExperienced investors
want to know
which managers are worth my attention?
what are Warren Buffett’s biggest moves?
which moves are real trades, not price drift?
who invests like the managers I follow?

Uncover insights beyond the raw data

Concentration, momentum, what changed — computed above the filing.

13F.LIVE

Finding the sweet spot between beginners and experts

One interface, both audiences — without compromising either.

13F.LIVE

Presenting the facts, cutting through the noise

Headline characteristics first, derivations on demand.

13F.LIVE

One system behind every screen

Tokens and components tuned for dense financial data.

Design system

Future possibilities

User needs I haven’t addressed yet.

Discover by style

Filter managers by investing style — find value, growth, or activist funds without knowing their names.

Analyze in plain language

Ask questions naturally and let AI handle the heavy analysis.

Signals worth acting on

Alert on real position changes from the managers you follow.

Good data engineering leads to way better UX

SEC data gets messy

Cleaning, normalizing, and validating filings is half the product work.

Bad data is a given

I’ve run into many errors — design for graceful failure.

Factual, not editorial

It takes real care to unlock insight while staying factual — never editorial.

Thank you

Haochen Z — haochen.design@gmail.com

Haochen Z — 2026