Spark — Subscription-Based Fintech Platform

Spark — Subscription-Based Fintech Platform

Completed Completed: Jun 2025

A subscription-based fintech product enabling credit access for underserved users through trust-based lending.

My Contribution:

Played a key role in developing and scaling core modules within a clean architecture system (Domain → Application → Adapters → Infrastructure), ensuring maintainability and testability.

Designed and implemented business logic for payment workflows and eligibility progression, enabling users to unlock increasing credit limits based on repayment behavior.

Integrated and optimized third-party services including Plaid (bank linking & verification) and VoPay (ACH payments & recurring billing) to ensure reliable financial transactions.

Worked on Supabase (PostgreSQL) for backend operations, including secure data handling with row-level security and real-time features.

Contributed to credit tracking and user insights by integrating external APIs like Bloom (Equifax) and underwriting systems.

Improved system reliability by implementing error tracking (Sentry) and contributing to monitoring workflows (Datadog, Mixpanel).

Wrote and maintained unit, integration, and end-to-end tests using Vitest, React Testing Library, and Playwright, helping enforce strong quality gates.

Collaborated in an agile team to deliver features across Next.js (App Router), React Server Components, and TypeScript, maintaining performance and scalability.

Supported deployment and release cycles using Vercel, Terraform, and CI/CD pipelines, ensuring smooth staging-to-production transitions.

Technologies Used

PostgreSQL
Supabase
React
Next.js
TypeScript
Vercel
REST APIs
OAuth2 & JWT
Clean Architecture
Playwright
Datadog & Sentry
Project Details
Status: Completed
Created: Mar 16, 2026
Completed: Jun 01, 2025

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