Resume
Emirhan Kemal KOSEM
I'm a Frontend Software Engineer with over 8 years of experience building high-performance web applications across various industries. Based in Berlin, I specialise in React, Next.js, JavaScript, TypeScript, and GraphQL, with a strong focus on accessibility and web standards.
Throughout my career in fintech, media, telecommunications, and e-commerce, I've collaborated closely with cross-functional teams to develop scalable solutions. I enjoy modernising outdated systems, designing efficient component libraries that accelerate development, and optimising web applications for seamless user experiences. By combining technical expertise with a strategic mindset, I make architectural decisions that enhance performance and drive business success.
Passionate about creating accessible, user-friendly digital experiences, I'm always eager to stay ahead of the latest frontend technologies and continuously expand my skill set.
Experience
FRONTEND ENGINEER | ADAC PINCAMP GMBH | BERLIN | 2022 - PRESENT
- Optimise and maintain the PiNCAMP web platform, a leading camper marketplace in Germany, Switzerland, and the Netherlands.
- Collaborate closely with Product and Design teams to enhance UX, UI consistency and help them for design tokens and design system.
- Implement technical design decisions, monitor and improve core web vitals(LCP, INP, CLS)
- Lead accessibility compliance initiatives across multiple projects
- Assist backend team as a cross-functional team collaboration.
- Improve SEO and taking care of Google Analytics' events
- Tech Stack: JavaScript, TypeScript, NextJS, Web Components, Context API, Jest, React Testing Library, EmotionJS, GraphQL, Python, Hygraph Headless CMS, CI/CD Pipelines, Github Actions, AWS, Datadog.
FRONTEND ENGINEER | IYZICO | ISTANBUL | 2021 - 2022
- Developed and optimised the merchant web app, improving usability and performance.
- Led frontend development for onboarding funnels and financial dashboards for B2B users.
- Provided technical support for the checkout widget used by business clients.
- Led technical architecture decisions and mentored junior developers.
- Contributed to the Frontend Manifesto and led initiatives in the Frontend Training Community.
- Tech Stack: JavaScript, TypeScript, Redux, React, Preact, GraphQL, Jest, React Testing Library, Cypress, Styled-Components, Sentry, Datadog, Java, Spring MVC, AWS, Github Actions.
FRONTEND ENGINEER | DIGITURK | ISTANBUL | 2019 - 2021
- Modernised beIN Connect, an OTT(Over-the-Top)/VOD(Video-On-Demand) platform handling 500K+ concurrent users during peak events.
- Migrated the legacy ASP.NET/jQuery project to React, significantly improving maintainability and performance.
- Created reusable design system components, reducing development time.
- Enhanced cross-browser compatibility with optimised CSS utilities.
- Tech Stack: JavaScript, jQuery, React, Styled-Components, REST API, ASP.NET.
ASSISTANT SOFTWARE ENGINEER | HUAWEI | ISTANBUL | 2018 - 2019
- Developed business web applications for Vodafone Turkey and Saudi Telecom Company.
- Handled end-to-end development, from data preparation to frontend implementation.
- Optimised big data processing for scalable web systems.
- Tech Stack: Java, JavaScript, TypeScript, React, Redux, Ant Design, Styled-Components, Scala, Hadoop, PostgreSQL.
JR. SOFTWARE ENGINEER | D-CAT TECHNOLOGIES | ISTANBUL | 2015 - 2018
- Developed Java EE web applications and REST APIs with Spring MVC.
- Built cross-platform mobile apps using Ionic Framework.
Education
Istanbul Aydin University - Software Engineering(2018)
Skills
Frontend: React, NextJS, TypeScript, JavaScript, Redux, Webpack
Backend: NodeJS, Java, Spring, REST API, GraphQL
Testing: Jest, Cypress, React Testing Library, Vitest, Playwright
Styling: CSS, SASS, Styled-Components, EmotionJS, CSS modules, TailwindCSS
Tools & Methodologies: Git, Docker, Github Actions, CI/CD, Agile (Scrum), a11y(Accessibility), UX/UI Design, Design Systems
~ Thanks for your time! ~