Business
1,528 items in 12 lists
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Jim Barksdale hbr.org
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Startup growth calculator growth.tlb.org
Simple yet effective interactive profitability calculator for startups.
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GnuCash Tutorial and Concepts Guide gnucash.org
A complete tutorial on personal finance tracking with GnuCash.
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Tazama github.com
🆓 Open-source real-time transaction monitoring software for fraud and money laundering detection, governed by the Tazama Linux Foundation project. This is just an engine to define rules, weight them, and apply them to transactions. There is nothing specific to payments or…
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RTB4Free github.com
🆓 Apache-2.0 OpenRTB 2.0-compliant bidder and Demand Side Platform (DSP). Largely dormant since late 2022, but the only OSS DSP reference in this niche.
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Papers we love: Auctions and Bidding github.com
A collection of papers on bidding and auctions.
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moov github.com
🆓 Suite of Apache-2.0 libraries for financial technology, including moov-io/ach, iso8583, and watchman. No paid product on top.
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Mojaloop Fraud Risk Management github.com
🆓 Concrete AML rule implementations from the Mojaloop Foundation: transaction mirroring (90-100% amount-match window), multi-tier payee-graph traversal for layering detection, account-dormancy reactivation, large-transaction-payer, new-payee-transfer. Repo is archived but the…
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Fintech Open Source Foundation github.com
🆓 Linux Foundation project hosting open-source projects for financial services.
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Samsung's online ads platform/exchange war story github.com
How to scale to 5M bid request/s, 2ms Max Response Time.
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GCP billing news gcpweekly.com
From the unofficial Google Cloud Platform newsletter.
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How I Stopped a Credit Card Thief From Ripping Off 3,537 People – and Saved Our Nonprofit in the Process freecodecamp.org
Describe a fraud technique known as "card testing", in which massive batch of stolen cards are checked for their validity against your API.
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Reproducible Machine Learning for Credit Card Fraud detection fraud-detection-handbook.github.io
A practical handbook on how to identify patterns in transactions.
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What is FinOps finops.org
A framework for tech finance and business leadership teams to share the same language and processes of cloud operations and management.
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Hacking Scooters: How I Created $100k Worth Of Free Rides fant.io
A cautionary tale on how promo codes can be exploited to get unlimited free rides.
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How to project customer retention faculty.wharton.upenn.edu
A seminal paper, with a stronger approach compared to the one above: the exponential distributions is replaced by a geometric model, which is better suited to discrete time intervals like monthly contracts, the former being more appropriate to continuous time process.
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European Spreadsheet Risks Interest Group - Horror Stories eusprig.org
A collection of cases in which uncontrolled and untested spreadsheet models led to lost revenue, mispricing, poor decision making, fraud and systemic financial failure.
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Council Directive 2006/112/EC eur-lex.europa.eu
European Union reference on the common system of VAT.
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Council Directive 2016/1065 as regards the treatment of vouchers eur-lex.europa.eu
European directive on the application of VAT when vouchers are involved.
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Vickrey auction en.wikipedia.org
Hinted by an HN comment, in which yes, “‘Asking people what they'd pay for and how much rarely works.’ (…) Using a Vickrey auction, similar to Google's ad auction mechanism, can elicit a person's maximum willingness-to-pay.”
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Van Westendorp's Price Sensitivity Meter en.wikipedia.org
PSM is a market technique for determining consumer price preferences. Allows for drawing a revenue curve to estimate the price point delivering the maximum revenue.
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Universal Business Language en.wikipedia.org
Most invoicing software can read and write UBL documents (XML) for data transfer.
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Superman III en.wikipedia.org
The 1983 film in which Gus Gorman, a laid-off clerk who retrains as a programmer, embezzles from his employer's payroll by skimming the fractions of a cent it rounds down.
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Riemann sum en.wikipedia.org
The starting point about quantization of usage.
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RFM (customer value) en.wikipedia.org
A refined model of CLV, used to segment users based on Recency, Frequency and Monetary value.
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Orbitera en.wikipedia.org
GCP's billing subsidiary.
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Huber loss en.wikipedia.org
“A loss function used in robust regression, that is less sensitive to outliers in data than the squared error loss.”
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Gabor–Granger method en.wikipedia.org
Used in surveys to determine the price for a new product or service. The results can be used to produce a demand chart and a revenue curve.
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EPC QR code en.wikipedia.org
EU standard for QR codes used to transfer money between bank accounts via SEPA.
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Credit note en.wikipedia.org
Because an invoice is immutable, the only way to fully or partially cancel it is to produce a credit note.
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Benford's law en.wikipedia.org
Digit distribution can be a signal of accounting fraud.
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Allen's interval algebra en.wikipedia.org
Implementing usage-based pricing is tricky, and this algebra will help you organize temporal reasoning. Also see this Stack Overflow question with clean schema.
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Address Verification System en.wikipedia.org
A system checking the matching of customer's billing addresses with the one associated with the credit card.
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£sd computing en.wikipedia.org
The IBM 1401 mainframe (1959) optionally supported pounds/shillings/pence (£sd) currency arithmetics in hardware.
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Electropedia: Tariffs for electricity electropedia.org
Before the cloud, there was another metered resource priced by its usage: electricity. Here is a detailed (and multi-lingual) taxonomy of its vocabulary from the International Electrotechnical Commission.
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Personalised pricing and EU law econstor.eu
Some cases of price personalisation are prohibited in EU due to consumer protection and data protection rules.
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EC2Instances.info ec2instances.info
💸 Easy Amazon EC2 Instance Comparison. Operated by Vantage as a free lead-gen surface for its commercial FinOps platform.
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EU eInvoicing ec.europa.eu
European standard on electronic invoice.
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So, you want to learn Bookkeeping! dwmbeancounter.com
Focus on the daily operations of recording and maintaining the transactions of a business.
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Optimizing payments with machine learning dropbox.tech
Describes a classic payment workflow, then how machine learning can replace hard-coded business rules and fine-tune the payment failures/retries loop to increase the success rates of charges.
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Accounting for Developers 101 docs.google.com
A general introduction to history and vocabulary of accounting.
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DigitalOcean Billing changelog docs.digitalocean.com
All the latest billing updates on DO.
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Idempotency in the context of payments developers.google.com
“Idempotency prevents race conditions. Idempotency dictates that multiple identical requests from the same client do not result in a different final state.”
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Books, an immutable double-entry accounting database service developer.squareup.com
Explain the basic data model of a double-entry accounting system relying on Google Spanner for internal use at Square.
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Apple In-app purchase Human Interface Guidelines developer.apple.com
Guide and recommendation on how to make auto-renewable subscriptions user-friendly.
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Detax detax.framer.website
A site mockup of an tax avoidance product for small businesses.
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Deconstructing Amazon EC2 Spot Instance Pricing dants.github.io
“Cloud providers possessing large quantities of spare capacity must either incentivize clients to purchase it or suffer losses. Amazon is the first cloud provider to address this challenge, by allowing clients to bid on spare capacity and by granting resources to bidders while…
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A Survey of Profit Optimization Techniques for Cloud Providers cs.newpaltz.edu
“The strategy of improving user service quality is discussed first, followed by the pricing strategy for cloud resources to maximize revenue.”
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Product Development as Iterated Taste commoncog.com
AWS sacrificed the simplicity of subscription pricing for S3 and went instead with a safe cost-following strategy because they had no clue how the users will use their service.
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The Games People Play With Cash Flow commoncog.com
“Malone created a new accounting metric, something he called ‘earnings before interest, depreciation, and taxes’, or EBITDA.” This is how a cable company CEO made sense of cash flow, like real-estate business did. The article starts with this example and describes other cash…
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