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Hi, I’m Elif Sinem Ağar, a mid-level frontend developer specializing in React, React Native, and Next.js. I design scalable, high-performance web and mobile apps and enjoy turning complex problems into clean, user-friendly interfaces. I thrive in agile teams, collaborate across disciplines, and love building fintech, gaming, and enterprise solutions. Outside work, I enjoy learning new technologies, contributing to open source, and mentoring others.…Hi, I’m Elif Sinem Ağar, a mid-level frontend developer specializing in React, React Native, and Next.js. I design scalable, high-performance web and mobile apps and enjoy turning complex problems into clean, user-friendly interfaces. I thrive in agile teams, collaborate across disciplines, and love building fintech, gaming, and enterprise solutions. Outside work, I enjoy learning new technologies, contributing to open source, and mentoring others.

Elif Sinem Ağar

Web Developer, Front-End Developer, Full Stack Developer, +3

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Hi, I’m Elif Sinem Ağar, a mid-level frontend developer specializing in React, React Native, and Next.js. I design scalable, high-performance web and mobile apps and enjoy turning complex problems into clean, user-friendly interfaces. I thrive in agile teams, collaborate across disciplines, and love building fintech, gaming, and enterprise solutions. Outside work, I enjoy learning new technologies, contributing to open source, and mentoring others.…Hi, I’m Elif Sinem Ağar, a mid-level frontend developer specializing in React, React Native, and Next.js. I design scalable, high-performance web and mobile apps and enjoy turning complex problems into clean, user-friendly interfaces. I thrive in agile teams, collaborate across disciplines, and love building fintech, gaming, and enterprise solutions. Outside work, I enjoy learning new technologies, contributing to open source, and mentoring others.

Available to hire

Hi, I’m Elif Sinem Ağar, a mid-level frontend developer specializing in React, React Native, and Next.js. I design scalable, high-performance web and mobile apps and enjoy turning complex problems into clean, user-friendly interfaces.

I thrive in agile teams, collaborate across disciplines, and love building fintech, gaming, and enterprise solutions. Outside work, I enjoy learning new technologies, contributing to open source, and mentoring others.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Turkish

Fluent

English

Advanced

Work Experience

Frontend Developer at Azer Lottery (Misli)

July 1, 2024 - Present

Developed a high-traffic gaming platform using React, Next.js, RESTful APIs; implemented dynamic live draw features using server-side rendering and conditional UI logic to optimize performance.

Frontend Developer at Ulker SAP Web

February 1, 2025 - April 1, 2025

Took part in the development of warehousing interfaces and related onboarding/completion screens, with quality-control screens, using React and RESTful APIs.

Frontend Developer at Ersey Makine Web Site

December 1, 2023 - February 1, 2024

Developed Ersey Makine's website using React, Next.js, Redux, Ant Design, Styled Components, and React DOM.

Frontend Developer (Trainee) at Tein Technology (Duzce Techno Park)

January 1, 2022 - January 1, 2023

Web Front-End trainee; developed web applications in React, completed weekly tasks, and earned a certificate using libraries such as React, Redux Toolkit, Router DOM, Chakra.

Software Developer Intern at Azer B&R D Tech Inc. / IT Valley / Bilisim Vadisi

May 1, 2021 - September 1, 2021

Internship focusing on transitioning desktop applications to web; developed AI tools using Python.

Software Developer at Affilee Startup

November 1, 2020 - May 1, 2021

Software Developer and Social Media Contributor to the early-stage AFFILEE STARTUP project by building the website interface using HTML, CSS, and JavaScript, and implementing core functionality.

Frontend Developer at Pendigit (Super App)

October 1, 2025 - Present

Contributed to a multi-domain super app by developing modular and scalable frontend architecture using React, Next.js, Tailwind, and Redux; collaborated with cross-functional teams to deliver maintainable, high-performance user experiences.

Frontend Developer at Azer Lottery (Milli)

July 1, 2024 - Present

Developed and maintained a high-traffic gaming platform using React, Next.js, Redux Toolkit, Tailwind, and SCSS. Implemented dynamic lottery modules and virtual game flows with reusable components. Integrated secure real-time payment and balance top-up systems via REST APIs and third-party SDKs. Built live draw features using server-side rendering and conditional UI logic for performance optimization. Worked in Agile teams using Jira, Azure DevOps, ClickUp, and Postman.

Frontend Developer at CCC (Ülk er SAP Web)

February 1, 2025 - April 1, 2025

Developed warehousing creation, initiation, completion, and quality control interfaces using React and REST APIs.

Frontend Developer at Corporate Communication Portal (KIP / Dongee)

February 1, 2024 - July 1, 2024

Built employee tracking and internal communication features using React, Redux, Ant Design, SCSS, and Survey-React. Implemented shift management, form generation, request workflows, and payroll tracking modules.

Frontend Developer at Fibabanka via Tein

February 1, 2023 - December 1, 2023

Developed cross-platform components for iOS, Android, and web using React Native. Led migration of the Mercan application to React, including UI implementation and API integration. Managed global state with Redux Toolkit and supported DevOps and deployment pipelines. Delivered features such as bank limit definitions, role-based transaction management, and text configuration.