Current focus
Software engineering & independent products
Building production web applications, developer tools, reusable UI systems, and independent products under the Kaizoku Oni identity.
Software engineer · Product builder
I build useful software, developer tools and digital products.
I'm Fehmi Citiloglu, a software engineer focused on modern web applications, frontend architecture, backend systems, open-source tooling, and product development. Kaizoku Oni is the home of my projects and experiments.
- 4+Years building software
- Full stackWeb, systems, and tools
- Open sourceProjects and experiments
01 / About
Engineering with a product mindset.
I enjoy turning complex technical problems into products that are fast, maintainable, and pleasant to use.
My background spans frontend engineering, Node.js backends, databases, cloud infrastructure, developer tooling, design systems, and systems programming.
I work primarily with TypeScript, React, Vue, Node.js, PostgreSQL, MongoDB, Docker, and Rust. I also explore game development, native applications, and local AI systems.
TypeScriptJavaScriptReactNext.js
Vue.jsNode.jsRustPostgreSQL
MongoDBDockerAWSGitHub Actions
02 / Selected projects
A growing ecosystem under one domain.
01
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Developer platform
Kaizoku Oni Tools
A collection of browser-based developer utilities, technical articles, and privacy-conscious tools.
02
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Open-source UI
Firik UI
A design system and component library focused on modern product interfaces and fintech use cases.
03
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Career
Interactive Resume
A dedicated overview of my professional background, engineering experience, and technical skills.
04
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Code & experiments
GitHub Projects
Open-source repositories, prototypes, engineering experiments, and ongoing software projects.
03 / Experience
From interfaces to infrastructure.
Professional work
Frontend and full-stack development
Experience across ERP software, CRM systems, e-learning products, fintech MVPs, and modern web platforms using React, Next.js, Vue.js, Node.js, and cloud services.
04 / Contact
Let's build something useful.
I'm interested in software engineering opportunities, product collaborations, open-source work, and technically ambitious projects.