Octavian Ratiu, Developer in Cluj-Napoca, Cluj County, Romania
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Octavian Ratiu

Verified Expert  in Engineering

Software Engineer and Developer

Cluj-Napoca, Cluj County, Romania

Toptal member since May 8, 2025

Expertise
Front-endHTML5React.jsJavaScriptTypeScriptCSSReduxExpress.jsTailwind CSSNext.jsGraphQLAngularMacOSElectron.jsContentful
Bio

Octavian is a software engineer with 10 years of experience. He specializes in front-end development with React and back-end development with Express.js. Having worked across multiple industries, both in closed and open source, Octavian has encountered different team sizes and modes of organization, which has allowed him to grow and improve.

Portfolio

Nenos Software
React, Vite, Material UI, GraphQL, Apollo, MobX, Express.js, TypeScript...
YLD
Auth0 API, Contentful, React, Atomic Design, Styled-components, Recoil, Node.js...
Micro Focus International
React, Redux, SCSS, TypeScript, Node.js, ECMAScript (ES6), JavaScript...

Experience

  • React - 7 years
  • TypeScript - 5 years
  • Jest - 5 years
  • Tailwind CSS - 4 years
  • Express.js - 4 years
  • Next.js - 3 years
  • Zustand - 3 years

Availability

Full-time

Preferred Environment

MacOS

The most amazing...

...thing I've built is Arkanis, an electron app that uses large language models (LLMs) to provide real time assistance in virtual meetings.

Work Experience

Senior Full-stack Engineer

2024 - 2025
Nenos Software
  • Developed an app that enables companies to track CO2 emissions for all their operations.
  • Worked across the stack in tight collaboration with the solution architect.
  • Provided guidance to junior team members via pair programming sessions.
  • Set up the monorepo and created the needed configuration.
Technologies: React, Vite, Material UI, GraphQL, Apollo, MobX, Express.js, TypeScript, ECMAScript (ES6), JavaScript, Front-end, APIs

Senior Full-stack Engineer

2022 - 2023
YLD
  • Refactored the most critical module of the application.
  • Worked across the stack, from front-end development to CI/CD Git flows.
  • Fixed multiple bugs we caught using Sentry, ensuring a good user experience.
Technologies: Auth0 API, Contentful, React, Atomic Design, Styled-components, Recoil, Node.js, Sentry, ECMAScript (ES6), JavaScript, Front-end, APIs, REST

Senior Full-stack Engineer

2017 - 2022
Micro Focus International
  • Refactored the debugger feature of our application, providing over a 300% performance increase.
  • Achieved podium finishes in multiple internal "innovation" events. Features devised during these events made it to production and stood out as highlights in specific releases.
  • Volunteered to mentor interns, nurturing them into junior developers who were eventually employed.
  • Fixed critical bugs and helped with the client retention rate.
Technologies: React, Redux, SCSS, TypeScript, Node.js, ECMAScript (ES6), JavaScript, Front-end, APIs, REST

Front-end Engineer

2017 - 2017
Starcoders
  • Implemented pixel-perfect designs by leveraging good CSS practices.
  • Developed multiple features involving customer satisfaction.
  • Created a key marketing feature to increase the client retention rate.
Technologies: React, HTML5, CSS, JavaScript, Front-end, APIs

Full-stack Engineer

2015 - 2016
Makronetz
  • Worked on an entire suite of web apps developed by the company.
  • Completed an internship and was subsequently got hired as a full-stack developer.
  • Leveraged multiple technologies across the suite of applications.
Technologies: Angular, Symfony, Laravel, React, JavaScript, Front-end, APIs, REST

Experience

Arkanis

http://arkanis.io
Arkanis is a tool leveraging state-of-the-art LLMs, and it enables users to have instant knowledge in online meetings. It excels in fact-checking scenarios in interviews, technical support calls, and other interactive sessions.

Education

2016 - 2018

Master's Degree in Computer Engineering

Babeș-Bolyai University - Cluj-Napoca, Romania

2013 - 2016

Bachelor's Degree in Computer Science

Babeș-Bolyai University - Cluj-Napoca, Romania

Skills

Libraries/APIs

React, React Testing Library, OpenAI API, MobX, Auth0 API, Node.js

Tools

Sentry

Languages

TypeScript, HTML5, ECMAScript (ES6), JavaScript, CSS, GraphQL, SCSS

Frameworks

Redux, Express.js, Jest, Tailwind CSS, Next.js, Electron, Material UI, Recoil, Angular, Symfony, Laravel

Paradigms

REST

Platforms

MacOS, Contentful

Other

Front-end, APIs, Zustand, Software Engineering, Distributed Systems, Supabase, Gemini API, WebSockets, Vite, Apollo, Atomic Design, Styled-components

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