Fintech systems · Distributed pipelines · resilient backends

KARAA
KAMARAN

I design and build fintech infrastructure and distributed systems where correctness, consistency, and failure handling matter more than raw speed.

Django
NestJS
PostgreSQL
Redis
Celery
RabbitMQ
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0 Live platforms
0 Integration flows
0 Production services
0 Manual handoffs
About
Systems that are
fast, consistent,
and don't break
when things go wrong.

I combine practical backend engineering with systems thinking to create platforms that are easy to maintain and safe to scale. My work focuses on reducing operational friction while keeping payment flows accurate and resilient.

On my current team, I help shape middleware for authorization, clearing, and settlement so that critical fintech flows remain stable even when external dependencies are unpredictable.

My approach values clear contracts, fast feedback loops, and architecture that earns trust in production.

Python Django NestJS TypeScript PostgreSQL Redis Celery RabbitMQ Docker Microservices
Approach
Systems thinking Domain-first backend design
How I build resilient platforms
Process, observability, and operational clarity
  • Map data flow and failure modes early, then design contracts that survive retries, duplicates, and upstream latency.
  • Create async pipelines that keep work moving while preserving consistency across services.
  • Bring observability into the stack so incidents are detected before they become outages.
  • Prioritize operator-friendly design with clear fallbacks, recovery paths, and documented behavior.
  • Build cloud-ready, containerized platforms with PostgreSQL, Redis, RabbitMQ, and durable background workers.
Fail-safe design Event-driven API resilience Observability Ops-friendly
Projects
02
Pay by Link System

A merchant-facing flow engine for secure payment link creation, delivery, and confirmation. Built to reduce integration friction while maintaining payment state through async webhooks.

NestJSPostgreSQLWebhooks
03
Eventy

A role-based event management backend with secure ticketing APIs and advanced search. Designed for predictable response times and fast catalog queries under load.

DjangoDRFPostgreSQLRedis
04
Arbela E-Commerce

A product search and catalog engine built for fast filtering and scalable storefront APIs, with Elasticsearch powering relevance and discovery across large inventories.

DjangoElasticsearchPostgreSQL
05
Site Power System

A real-time operations backend for industrial sites, handling telemetry, generator state, and overlap detection for reliable equipment coordination.

NestJSTypeScriptPostgreSQL
06
SIM Distribution System

An operational backend for SIM inventory, agent workflows, and activation tracking across distributed distribution channels.

DjangoPostgreSQL
07
Meman Company Website

A clean content management experience backed by a tailored API, designed for fast publishing and performance-first page delivery.

DjangoHTMLCSSJS
Technical Skills
Languages & Frameworks
PythonDjangoDRF NestJSTypeScriptJavaScript JavaPHPLaravelReact
Architecture & Design
MicroservicesCQRS Clean ArchitectureAPI-First Distributed SystemsTDD
Databases & Caching
PostgreSQLMySQLMongoDB RedisData ModelingQuery Optimization
Async & Messaging
CeleryRabbitMQ Event-DrivenAsync Workflows Message Queues
APIs & Security
REST APIsJWTRBAC OAuth2WebhooksAPI Security
DevOps & Observability
DockerGitHub ActionsCI/CD AWS EC2S3ELK Stack GitElasticsearch
Open to collaboration

Talk about
systems, not just code.

Whether it’s payments infrastructure, event-driven workflows, or improving operational visibility, I’m interested in practical backend work that thrives in production.