Fintech Engineering Handbook
Patterns for building software that handles moneyBy Voytek PitulaRecorded TrackLength1h 30m
About this audiobook
In most software, a bug costs you some time. In fintech, it can cost real money, your customers' trust, or your licence.
This handbook covers the core engineering patterns for systems where money is the main concern, built on three principles: no invented data, no lost data, and no trust.
You will learn how to represent money with the right precision, record it in double-entry ledgers with full audit trails, move it safely with idempotency and funds reservation, deal with external providers through webhooks and reconciliation, and apply the controls that auditors expect.
It is for engineers joining fintech, practitioners who want a shared reference, and anyone curious why money systems are built differently.
Written by Voytek Pitula, who has worked on payments, accounting, and treasury systems for fiat and crypto.
Audiobook details
GenreTechnology
Length1 hr 30 mins
Narrated byRecorded Track
FormatAudiobook
Publish dateJul 27, 2026
LanguageEnglish
Table of contents
1Fintech Engineering Handbook
24Controls and access
2For whom?
25Segregation of duties and four-eyes
3Principles
26Access control
4Representing money
27The change trail (SDLC)
5Precision handling
28Testing
Mostrar todos os capítulosVer menos
6Rounding strategies
29Appendix A: Know your domain
7Currency handling
30Accounting & ledgers
8FX Rates
31Money & FX
9Recording money: the ledger
32Transactions, timing & settlement
10Double-entry bookkeeping
33Payments, rails & cards
11Value time vs booking time vs settlement time
34Trading & markets
12Audits and audit trails
35Custody & crypto
13Executing money flows
36Compliance & regulation
14Invariants
37Resources
15Funds reservation
38Appendix B: End to end examples
16Handling overdrafts
39Flow 1: A crypto withdrawal
17Idempotency
40Flow 2: A card deposit
18Full resumability
41Flow 3: An in-app conversion with cashback
19The external world
42Appendix C: About this handbook
20Consuming APIs
43Who wrote it
21Handling webhooks
44How it was written
22Notifying reliably (Outbox and CDC)
45What to expect
23Reconciliation
46Need more help?
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