When a failed payment means license risk, you need systems that handle peak traffic without breaking.
Billions of messages/day IoT system
Stabilized core payment system
Acquired in 18 months
Typed Erlang language features
"Tobias is one of the more talented Engineers I have had the pleasure to work with... I can highly recommend Tobias and there will always be an open position in my organization for him."
"His background having lead and scaled technical teams at Klarna was a distinguishing factor... I would highly recommend Happi to any early stage founders and executives building in tech."
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"Eventually, and also thanks to Erik's contribution, our company was acquired by a strategic buyer after only 18 months mainly due to our innovative technology."
"If you are searching for a motivated team that will go the last mile with you, deliver qualitative stuff and understand bad jokes…Happihacking is the right choice!"
Your System, Built to Last
Your fintech backend needs to handle millions of transactions without failing. When payment systems break, you face regulatory fines and lost customer trust.
You can't afford downtime. Your architecture determines whether you scale smoothly or face costly failures at peak traffic.
How You Get Reliable Scale
Your payment system needs proven architecture that handles peak traffic without errors. Companies like Meta and Klarna trust BEAM-powered backends for billions of daily transactions.
You start with a system audit to find failure points, then architect solutions that prevent outages before they happen.
Result: Your system scales smoothly under peak load. Your compliance team stays confident. Your customers experience zero payment failures.
See how you get there →Your Questions Answered
My system is very complex, can you help?
Schedule a call to discuss your specific challenges and how you can prevent costly failures.
What if your plan seems too risky for my business?
You start with a two-week proof of concept. You can see results before committing to the full architecture sprint.
How do you ensure your solution works under load?
Every solution includes load testing and failure simulation so you know your system won't break at peak traffic.
Can you provide a fixed price?
Yes. Your Scale Audit (€15k) and Architecture Sprint (€45k) have fixed scopes and guaranteed deliverables.
Ready to Scale Your Fintech Backend?
Let's discuss how we can help your compliance team sleep at night.
Your Success Partners
Your fintech backend needs experts who've built payment systems at scale. You get battle-tested architecture patterns that prevent the failures that cost you customers and compliance.
