FinTech · Web Platform
A real-time wealth platform built for scale
Re-architecting a legacy investment portal into a modular, real-time platform that holds up under heavy concurrent load.
In short
FinTech build, in short
- Modular service boundaries that let teams ship independently
- An append-only ledger with idempotent, auditable money movement
- Real-time positions and balances surfaced through fast read models
- Observability and progressive rollout baked into every deploy
What made this hard.
Legacy wealth portals tend to be one large application where every release risks the whole system. Adding a feature means touching code the original team left years ago, and load spikes during market hours expose every weak join.
The brief was to keep balances and positions accurate to the second, stay auditable for regulators, and let a product team ship without fear.
Stack
- Next.js
- TypeScript
- Go
- PostgreSQL
- Kafka
- Redis
- AWS
The build, step by step.
Domain boundaries first
We split the monolith into clear domains — accounts, positions, pricing, reporting — each owning its data and exposing a stable contract.
Event-driven core
Money movement and price updates flow through an append-only event log, so every change is ordered, replayable and reconcilable.
Read models for speed
Dashboards read from purpose-built projections rather than the write path, so the UI stays fast while the ledger stays correct.
Safe, boring releases
Feature flags and progressive rollout mean a change reaches a slice of traffic first and rolls back in seconds if anything looks off.
What you walk away with.
- Modular service boundaries that let teams ship independently
- An append-only ledger with idempotent, auditable money movement
- Real-time positions and balances surfaced through fast read models
- Observability and progressive rollout baked into every deploy
Services involved
A real-time wealth platform built for scale questions, answered.
Still unsure if A real-time wealth platform built for scale is right for your project? A senior engineer will tell you straight on a free call.
Money movement flows through an append-only event log, so every change is ordered and replayable. Balances are derived projections, which means they can always be rebuilt and reconciled against the source of truth.
Yes. We carve domains out of the monolith one at a time behind stable contracts, so the system keeps running throughout. There is no big-bang cutover.
The event log is the audit trail by design. Every state change is recorded with its cause, so reconstructing how an account reached a given balance is a query, not an investigation.
Building something similar?
Book a free 30-minute consultation. We'll pressure-test your challenge and map a path forward, whether or not we end up working together.