Full-Stack Dev · FinTech · Full Product Build
Coupl
coupl.money — India's first zero-balance digital joint account for couples, backed by Y Combinator.
The Problem
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The founders had a strong, validated idea for a shared banking product for couples but no technical team or foundation to build it on.
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No app, no backend, no infrastructure — zero technical starting point.
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They needed a partner to own the entire product: UX thinking, mobile app, backend engineering, and production-grade cloud.
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Y Combinator backing meant investor scrutiny — speed and quality both had to be non-negotiable.
What We Built
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Designed and developed the full mobile app — iOS and Android — from scratch. Every screen, every flow, every interaction.
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Built the complete backend and API layer: joint wallet logic, shared expense tracking, RuPay card integration.
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Set up cloud infrastructure with security, compliance, and scalability built in from day one.
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Integrated NPCI, RuPay, and BBPL payment rails — real banking infrastructure, not a prototype.
The Results
₹1 Cr+
Transactions processed in the first 8 months of going live
0 → Live
Full product from idea to production-ready app
YC Backed
Product held up to investor and regulatory scrutiny
Stack & Services