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Huddler's Write

We Huddlers at Payhuddle post new content across a variety of categories.
Browse our latest posts below and select specific categories based on your interests.

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Our Blogs

Karthik Gowrishankar

October 26, 2026

Fewer iterations, less manual work: what Tecto Intelligence changes in an EMV Level 3 test cycle

Level 3 test cycle loses time to avoidable iterations: fixes on the wrong side, one root cause behind many failures, setup mismatches. This blog walks through how Tecto Intelligence cuts those laps and what it can’t do.

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Karthik Gowrishankar

September 30, 2026

Deterministic Intelligence in Payments Testing: When Every Result Needs an Explanation

When an EMV Level 3 test fails, the hard part is finding out where the issue is. This blog explains what deterministic intelligence is, why payment specifications make it such a direct fit, and how it identifies the source of a failure and the other test cases affected by the same root cause.

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August 26, 2026

The certification lab is moving to the cloud. Most teams are still budgeting for the old one

Terminal, host, and CPV certification used to mean owning labs, kernels, and specialists in-house for all the payment entities. TaaS makes it a service that specialist payment service providers offer: accredited, cloud-hosted testing across the full certification lifecycle. Understanding an edge test case or a mandate letter is expertise to keep in-house.

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Rajamalliga Sundar

EV Open Payments: Making EV charging in India as simple as tapping a card

EMVCo's new EVOP standard brings the same card interoperability that runs the world's ATMs and POS terminals to EV charging, and it is about to fix India's fragmented, one-app-per-network charging problem.

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Karthik Gowrishankar

Tokenization 2.0: Moving beyond simple payment tokens to "Merchant Tokens" and "Device Tokens."

Tokenization has evolved from simply replacing card numbers to purpose-built token types, merchant tokens bound to a specific merchant, and device tokens tied to a specific device.

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Karthik Gowrishankar

Write the recipe, not the code.

One engine, any workflow, defined in configuration rather than code.

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Karthik Gowrishankar

How Payhuddle builds reliability into every test tool and project

A look inside our DevOps practice, and how it helps our clients and us.

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Karthik Gowrishankar

Terminal Certification at a larger scale doesn't start with tools. It starts with streamlining the operational layer

The networks have standardized what to certify. The missing piece is how teams operationalize the execution at scale.

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Karthik Gowrishankar

The multi-kernel transition is here. Most teams are already behind.

The C-8 kernel is here, and how payment teams manage the multi-kernel transition period will determine who reaches the other side ready sooner.

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Sabapathy Narayanan

The bug was in the terminal, not the test

How Payhuddle's support team traced a failing JCB ATM certification to non-standard terminal behavior, and what it reveals about what quality engineering actually requires in payments.

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