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LEAPREX

Application & Product Development

Application & Product Development

From architecture decision to production deploy.

We build backend systems and full applications end to end — APIs, services, payment flows, and the infrastructure they run on — using the language and stack that fits the problem, not a house default. If that means Go for a high-throughput service, Python for the data layer, or Haskell where correctness guarantees actually matter, that's the call we'll make with you.

What's included

  • End-to-end product architecture, from idea to production system
  • Backend & API development in Go, Python, Node.js, and Haskell
  • Mobile app development in Kotlin (native Android) and Flutter (cross-platform)
  • Payment gateway integration and transaction-safe backend design
  • Event-driven and serverless architecture where it fits better than a monolith
  • Live streaming & real-time systems
  • Data engineering & analytics pipelines
  • Technical due diligence and architecture review for existing codebases

What you get

  • A system your team can extend, not just launch
  • Backend architecture chosen for the problem, not the trend
  • Payment and data flows built to fail safely
  • A clear technical roadmap beyond v1