// INITIALIZING PROFILE...

NURULLAHGUNDOGDU

▋

PostgreSQL

Redis

MongoDB

Kubernetes

Docker

VIEW WORK View Resume CONTACT

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// ABOUT_ME.md

BUILDING THE INVISIBLE
INFRASTRUCTURE

Backend Developer with 3+ years of experience designing scalable microservices, distributed systems, and robust RESTful/gRPC APIs. Specialized in the Golang ecosystem with strong practices in FinTech, modular monoliths, and data isolation architectures.

Currently architecting backend services at Kaf Technology for a UK-based FinTech and digital asset exchange. Previously full-stack at Kartelam.com and intern at PROFEN.

I obsess over observability, test-driven development, and reliable event-driven patterns — from transactional outbox to PCI DSS–compliant payment flows.

nurullah@kaf ~ zsh

❯ whoami

nurullah_gundogdu

❯ uname -r

Backend Developer v3.2

❯ uptime

3 years, 4 months

❯ cat /etc/specialties

Go, microservices, FinTech, DDD, TDD, observability

❯ echo $LOCATION

Istanbul, TR

❯ git status

On branch: main Open to: technical chats & OSS

❯ ▋

// TECH_STACK.json

SKILL MATRIX

BACKEND

GoFibergRPCREST APIC#TDD

DATA

PostgreSQLMongoDBRedisMulti-tenant Schemas

INFRA

DockerKubernetesGitCI/CD

OBSERVABILITY

PrometheusGrafanaOpenTelemetryDistributed Tracing

PATTERNS

DDDOutbox PatternModular MonolithEvent-Driven

FULL STACK

ReactReduxReact NativeJavaScript

// ls ~/projects

OPEN SOURCE ARSENAL

BARRAGE

Go CLI

● STABLE

Concurrent HTTP load testing CLI with worker pools, rate limiting, latency percentiles (p50/p95/p99), and a live terminal dashboard — built from scratch to explore Go concurrency in depth.

GoWorker PoolHTTP/2Bubbletea

PAYMENT LEDGER ENGINE

● ACTIVE

Multi-tenant payment ledger engine with reliable transaction processing and ledger isolation for financial workloads.

Scalable notification microservice built with Go and gRPC for high-throughput, low-latency message delivery.

GogRPCProtobuf

NUTRICORE BACKEND API

.NET 8

● STABLE

A production-ready backend API for a Diet Management System built with .NET 8, following Clean Architecture and CQRS principles. Dietitians can manage their clients and diet plans; administrators oversee the entire platform.

.NET 8CQRSClean Architecture

BREWLE

Mobile

● BETA

Anonymous chat coffee and tea break timer — a mobile app for spontaneous team breaks and casual conversations.

React NativeMobile

// git log --career

CAREER LOG

BACKEND DEVELOPER

Kaf Technology

MAR 2026 — PRESENT

Architecting backend services for a UK-based FinTech and digital asset exchange. Modular monolith with DDD, transactional outbox pattern, PCI DSS compliance, and full observability stack (Prometheus, Grafana, OTel).

GoPostgreSQLDDDTDDOTel

FULL STACK DEVELOPER

Kartelam.com

JUN 2023 — FEB 2026

Led full-stack development with React/Redux and Go backends. Built Planning & Warehouse panels (40% ops speedup), cut API latency 60%, and integrated AI APIs for automated data handling.

GoReactMongoDBDockerK8s

SOFTWARE DEVELOPER INTERN

PROFEN

MAR 2023 — APR 2023

Contributed to microservice projects with .NET Core and PostgreSQL in an Agile team. REST API development and legacy codebase refactoring.

.NET CorePostgreSQLRESTGit

// cat ~/.contact