Projects · Architecture case studies

Systems built around real constraints.

Detailed backend case studies covering architecture, scale, failure handling, technology choices, and the engineering decisions behind each delivery.

Browse case studies Open backend lab

system.catalog

Selected engineering work

Metrics shown here come from the portfolio’s existing project material.

service.01 iGaming · Real-time

Real-time Tournament System

A multi-operator tournament engine with live leaderboards, dynamic rewards, and reliable asynchronous orchestration.

10K+ concurrent players · 50ms average response

Bet API

Event Bus

Scoring Worker

Redis

WebSocket

constraint

Keep rankings fresh and consistent while thousands of players generate events concurrently.

ownership

Designed the event boundaries, read-optimized leaderboard path, and horizontally scalable consumers.

10K+ concurrent users
50ms average API response

service.02 Fintech · Web3

Multi-chain Payment Engine

A payment orchestration layer for fiat and crypto deposits, withdrawals, reconciliation, and treasury operations.

Multi-provider · Multi-network · Auditable lifecycle

Provider

Webhook API

Queue

Ledger

Settlement

constraint

Coordinate external providers and on-chain confirmations without double-crediting or losing auditability.

ownership

Built idempotent transaction flows, confirmation-depth checks, webhook verification, and ledger workflows.

Multi-provider abstraction
Multi-network deposit detection

service.03 Platform · Multi-tenant

White-label Casino Platform

One backend ecosystem serving multiple operators, brands, markets, games, and regional policy sets.

10K+ active players · Multi-region delivery

Tenant Edge

Policy

Game Engine

Event Hub

Data

constraint

Scale shared platform capability without leaking tenant configuration, data, or policy decisions.

ownership

Architected tenant-aware service boundaries, regional feature controls, and resilient event pipelines.

10K+ active players
Multi-operator and multi-brand delivery

service.04 Data · Infrastructure

High-volume Data Platform

A write-heavy operational data layer for gaming, financial, and analytical workloads with predictable query paths.

10M+ new records daily · Sub-second operational queries

Events

Ingestion

Partition

Index

Read Model

constraint

Sustain rapid daily growth without allowing hot shards, index sprawl, or analytical reads to degrade operations.

ownership

Designed sharding keys, compound indexes, retention paths, and cache-aware query models.

10M+ new records daily
Sub-second operational queries

service.05 Security · Multi-tenant

Authentication & Authorization Service

Centralized identity and access management supporting multiple authentication flows and tenant-aware authorization.

1M+ authentications daily · Sub-10ms token validation

Client

Identity

Policy

Session

Audit

constraint

Keep validation fast on every request while supporting secure session, role, attribute, and tenant policy decisions.

ownership

Designed token validation, distributed session management, tenant rate limiting, and auditable RBAC/ABAC policy checks.

1M+ authentications per day
Sub-10ms token validation

service.06 Infrastructure · Messaging

Multi-channel Notification Service

A high-throughput delivery service for email, SMS, push notifications, and webhooks with retries and provider failover.

5M+ notifications daily · 99.9% delivery success

Producer

Priority Queue

Worker

Provider

Receipt

constraint

Deliver millions of messages across unreliable external providers while maintaining priority, traceability, and retry safety.

ownership

Built priority queues, exponential backoff, dead-letter handling, provider adapters, and delivery-state tracking.

5M+ notifications daily
99.9% delivery success