📰 Dev.to · arun rajkumar

Articles from Dev.to · arun rajkumar · 5 articles · Updated every 3 hours · View all reads

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We Built an Open-Source Coding Exam Platform Because Every Vendor Let Us Down

Dev.to · arun rajkumar 19h ago

We Built an Open-Source Coding Exam Platform Because Every Vendor Let Us Down

Every year, our team visits engineering colleges across India to hire freshers. The first round is...

Open Banking Was Built for the Wrong Future — and That's Why It's Perfect for AI Agents

Dev.to · arun rajkumar 4d ago

Open Banking Was Built for the Wrong Future — and That's Why It's Perfect for AI Agents

Visa announced infrastructure for AI agents to make payments without asking you first. GoCardless...

How Open Banking APIs Actually Work — A Developer's Guide

Dev.to · arun rajkumar 1w ago

How Open Banking APIs Actually Work — A Developer's Guide

You've integrated Stripe. You've wired up PayPal. You've copy-pasted card tokenisation code from...

Why Open Banking Is Eating Card Payments in the UK (And the Numbers Prove It)

Dev.to · arun rajkumar 1w ago

Why Open Banking Is Eating Card Payments in the UK (And the Numbers Prove It)

I've been building payment infrastructure for the last few years. Cards were the default. Visa,...

How We Built Atoa's Payment Infrastructure with 15 NestJS Microservices (And What Took the Most Figuring Out)

Dev.to · arun rajkumar 2w ago

How We Built Atoa's Payment Infrastructure with 15 NestJS Microservices (And What Took the Most Figuring Out)

Open banking in the UK just crossed 24 billion successful API calls in 2025. Payment initiation grew...