Ledgerline
Open source
Double-entry bookkeeping library with property-based tests covering every posting rule.
Hello
Backend engineer with six years on high-traffic Laravel products. I own billing correctness and queue reliability, and I like the unglamorous work of making a flaky system boring again.
Lately that has meant payments infrastructure — retries, reconciliation and the reporting that finance actually reads.
6+
Years shipping
40
Integrations live
54%
Fewer failed settlements
What I do
Services
01
Payments & billing
Subscriptions, retries, reconciliation and the ledgers behind them — built to be audited.
02
Queue & job reliability
Idempotent workers, dead-letter handling and dashboards that say what actually failed.
03
API design
Partner-facing APIs with contract tests, versioning and documentation people can follow.
04
Performance work
Finding the one query that costs four seconds, and the report that never needed it.
Impact that matters
Results
6+
Years shipping
40
Integrations live
54%
Fewer failed settlements
3
Engineers mentored
Selected work
Project case studies
Settle
Product
A payments dashboard for finance teams: reconciliation, disputes and payouts on one screen.
Northwind Partner API
API
The partner reporting API used by 40 integrators, with contract tests on every endpoint.
Tally
Mobile
A small expense app built to learn Flutter — and to stop losing receipts.
Kind words
What clients say
“Aarti rebuilt our settlement pipeline in a quarter and it has not paged anyone since. That is the whole review.”
“The rare engineer who writes the runbook before the incident. Our integrators noticed the difference within a month.”
“Clear, calm and honest about trade-offs. I would hire her again tomorrow.”
Skills
Let us work together
Have a payments problem, a queue that misbehaves, or a team that needs a steady pair of hands? I would love to hear about it.
Available from November