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FinTech 8 weeks 4 engineers + 1 PM + 1 QA

FinTech MVP — Payment Platform

8-week MVP delivery
ReactNode.jsPostgreSQLAWS

A Gulf-based fintech startup needed to launch a payment processing platform to secure their next round of funding. With a hard deadline of 8 weeks and requirements spanning merchant onboarding, transaction processing, compliance reporting, and a consumer-facing mobile wallet, we assembled a dedicated team to take the product from concept to live transactions.

The Challenge

The founding team had a clear product vision and deep fintech domain expertise but no in-house engineering capacity. They needed a payment platform that could process peer-to-peer transfers and merchant payments while meeting regional regulatory requirements. The 8-week deadline was non-negotiable because their investor term sheet was contingent on a live product demonstration.

  • No existing codebase or technical infrastructure to build upon
  • Payment processing required PCI-DSS compliant architecture from day one
  • Multi-currency support needed for operations across three Gulf countries
  • KYC/AML verification workflow required integration with third-party identity providers
  • Real-time transaction monitoring and fraud detection capabilities were investor requirements
  • The platform had to handle at least 1,000 concurrent transactions during the demo

Our Solution

We structured the 8-week engagement into four two-week sprints, each delivering a functional increment that the founders could review and test. The architecture was designed for PCI-DSS compliance from the ground up, using tokenized payment data, encrypted storage, and isolated processing environments.

Sprint 1 focused on the core infrastructure: user authentication, database schema, API framework, and CI/CD pipeline. We set up a PostgreSQL database with row-level security policies and built a RESTful API layer using Node.js with Express, following a clean architecture pattern that separated business logic from framework concerns.

Sprint 2 delivered the merchant onboarding flow and KYC verification pipeline. We integrated with a regional identity verification provider that supported national ID validation across multiple Gulf countries. The onboarding process was designed to collect required compliance documentation while keeping the user experience streamlined.

Sprint 3 built the transaction processing engine, including peer-to-peer transfers, merchant payments, and real-time balance management. We implemented an event-driven architecture using AWS SQS for transaction queuing and SNS for real-time notifications, ensuring no transaction was lost even under peak load.

Sprint 4 focused on the admin dashboard, reporting tools, and load testing. The dashboard gave the founding team real-time visibility into transaction volumes, user growth, and compliance status. We conducted load testing simulating 5,000 concurrent users to ensure the platform exceeded the investor demonstration requirements.

Results & Impact

  • 8 weeks — Concept to Launch
  • < 200ms — Transaction Processing Time
  • $2.4M — Funding Secured Post-Demo
  • 99.97% — Uptime Since Launch

The platform launched on schedule and processed its first live transactions during the investor demonstration. The founders successfully closed their seed round at $2.4 million, with investors citing the technical execution and speed to market as key differentiators.

Within three months of launch, the platform onboarded 120 merchants and processed over 15,000 transactions. The architecture proved scalable, handling a 10x increase in transaction volume without performance degradation. Our team continued as the dedicated engineering team post-launch, iterating on the product based on user feedback and expanding features for the next funding milestone.

Tech Stack

ReactNode.jsPostgreSQLAWS

Sonics Yard took us from a pitch deck to a live payment platform in 8 weeks. Their team operated like co-founders, not contractors. The technical decisions they made in week one are still serving us well as we scale.

A
Ahmed K.CEO & Co-Founder, Gulf Payment Solutions

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