Nuri CanÖztürk.

Backend engineer working with Java and Spring Boot. I build microservices and developer tools, and contribute to open source.

Explore projects → Read writing

years in backend

live products

open-source projects

articles written

JavaSpring BootSpring Data JPASpring SecurityGoRESTMicroservicesKafkaRabbitMQEvent-drivenAsync processingPostgreSQLMySQLMongoDBRedisData modelingACIDKubernetesDockerHelmTerraformCI/CDMulti-tenancyScalable designClean architectureSOLIDTDDTypeScriptAngularTailwindSvelteJavaSpring BootSpring Data JPASpring SecurityGoRESTMicroservicesKafkaRabbitMQEvent-drivenAsync processingPostgreSQLMySQLMongoDBRedisData modelingACIDKubernetesDockerHelmTerraformCI/CDMulti-tenancyScalable designClean architectureSOLIDTDDTypeScriptAngularTailwindSvelte

developer.ts Ln 9 · Col 3

const developer = {
  name: "Nuri Can Öztürk",
  role: "Software Engineer",
  languages: ["Java", "Go", "TypeScript"],
  builds: "package registries, message brokers, dev tools",
  approach: "rebuild what I depend on",
  openSource: true,
};

04About

I'm a backend engineer. I started with Java and Spring in 2022 and since then I've worked on package registries, message brokers and self-hosted developer tools — the kind of infrastructure other engineers build on.

I'd rather understand a system than treat it as a black box, which is why so many of my side projects are small re-implementations of tools I use every day.

Builds: Package registries, message brokers, developer tools
Writes in: Turkish & English

05Approach

I trust a tool once I know how it works. So I rebuild the ones I depend on — and then write about what I found.

~~Spring~~→nucleus-framework

A minimal dependency-injection framework: annotations, reflection and byte-buddy.

~~JUnit~~→unit-test-framework

A test framework in plain Java 21 — annotations and reflection only.

~~RabbitMQ~~→BearMQ

A lightweight distributed message queue for the JVM, speaking AMQP 0-9-1.

~~kubectl~~→k8-shell

A read-only, shell-like way to explore a cluster, compiled to a GraalVM native image.

Outside my own repos I contribute to open source — including a Turkish open-source Kubernetes book — and publish notes on backend engineering in the blog below.

06Experience · 2022 – 2026

Jun 2026 – Oct 2026

Huawei · Software Engineer

Backend services and microservices with Java and Spring Boot. Scalable, maintainable systems.

Jun 2024 – Jun 2026

Repsy · Junior Software Engineer

Cloud package-as-a-service for Maven, Gradle, NPM, Cargo and Docker. Java 21+, Spring Boot microservices, event-driven architecture, RabbitMQ, Kubernetes + Helm, CI/CD.

Jul 2023 – Oct 2023

FileOrbis · Software Engineer Intern

Personal file management on ASP.NET Core + React: CRUD, secure upload/download, auth, cloud storage, REST APIs.

Aug 2022 – May 2023

Freelance · Java Developer

Desktop financial app: JavaFX, Hibernate, MySQL. Income/expense, employees, Excel reports.

Jun 2022 – Aug 2022

Kafein Technology · Software Engineering Intern

Spring Boot, DI, REST, enterprise Java patterns, code reviews, agile practices.

07Projects

Live running in production

GitNode

Self-hosted Git registry inspired by GitHub — your infra, your repos.

Java 25Spring BootAngularPostgreSQLDockerOAuth2

Website ↗GitHub Repo ↗

BearMQ

Lightweight, distributed message queue for JVM environments, compatible with AMQP 0-9-1.

Java 21Spring FrameworkSpring BootTCP/UDPchronicle-queue

Website ↗GitHub Repo ↗

CronBeat

Never miss a beat: monitor cron jobs and scheduled tasks, with alerts for missed, failed, or slow runs.

SaaSCron JobsKubernetesMonitoring

Website ↗

Open source read the code

unit-test-framework↗

Test framework similar to JUnit using core Java, reflection, and annotations.

Java 21AnnotationsReflection

nucleus-framework↗

Minimal dependency injection framework inspired by Spring.

Java 21AnnotationsReflectionbyte-buddy

setupshowroom.com↗

Platform for PC setup showcases, social features, and animated cards for forums and READMEs.

Java 21Spring BootPostgreSQLAWS S3KubernetesHelmTerraformAngular 19TypeScript

k8-shell↗

Read-only shell-like interface for interacting with a Kubernetes cluster.

JavaSpring BootSpring ShellGraalVM native image

call-of-project-backend↗

Find partners, run coding interviews, assign tasks — Spring Boot, Kafka, WebSockets, microservices.

JavaSpring BootJUnitMySQLMongoDBApache KafkaWebsocketsS3

call-of-project-interview-frontend↗

Interview module with Angular, PrimeNG, Monaco, HackerEarth API.

AngularPrimeNGMonaco EditorHackerEarth API

call-of-project-android↗

Kotlin Android client: notifications, projects, profiles, clean architecture.

AndroidKotlinJetpack ComposeHiltRetrofitRxJavaWebsocket

repsy↗

Contributor. Universal package repository: Docker, Maven, Gradle, NPM, PyPI in one place.

Java 25Spring Boot 4Angular 21PostgreSQLNode.js

kubernetes-kitap↗

Contributor. Turkish open-source Kubernetes book: control plane, scheduling, security, architecture.

KubernetesDocumentationDocsifyMarkdown

08open-source contributions

Code and docs I have sent upstream, beyond my own repositories.

h2database/h2database ↗

Distinct query ignores DESC when there is an index

Contributor

Contribution: Fixed SELECT DISTINCT … ORDER BY … DESC returning the smallest value when an index exists. Root cause: Index.findNext() always walked the index in ascending order. It now takes a reverse flag, so DESC queries walk the index backwards. Added a regression test.

repsyio/repsy ↗

Universal package registry

Contributor