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Kosalram RamakrishnanKR

Kosalram Ramakrishnan

Senior Frontend Developer

€450/day
Berlin, DE
8-15 years

Average response time: 1 hour

About Kosalram

I help startups and established brands build high-performance web and mobile applications that scale. With over 8+ years of experience including leading teams at Lightspeed Commerce and Flink, I specialize in creating seamless user experiences using React, React Native, and Next.js.

I’m not just a coder, I’m a product-focused engineer. I’ve built apps from the ground up that reached 100k+ downloads and contributed to platforms with over 10M active users (AHA Video). Whether you need a sophisticated Micro Frontend architecture or a robust cross-platform mobile app, I deliver clean, maintainable code that drives business value.

Core Expertise:

Web: React, Next.js, TypeScript, Single SPA (Micro Frontends)

Mobile: React Native (iOS/Android), Ionic

Testing & DevOps: Playwright, Jest, CI/CD, Deployment Automation

Let’s build something scalable. Drop me a message to discuss your project.
  • English

    Native or bilingual

  • German

    Conversational

Can work on-site
Berlin (up to 50km)

Experience

  • Lightspeed Commerce
    Senior Software Developer (Frontend)
    HOSPITALITY
    September 2023 - June 2024 (9 months)
    Berlin, Germany
    Leading the frontend team in building intuitive user interfaces and experiences. Collaborating closely with designers and backend developers to ensure seamless integration of frontend components. Driving best practices for code quality, performance, and maintainability. Mentoringjunior developers, providing guidance on frontend development best practices and technologies. Spearheading release and deployment processes for the team. Playing an active role in code reviews to maintain high standards of product quality. Contributing to the overall product roadmap and strategy discussions with insights from a frontend perspective. Tech Stack - Native, ReactJs, NextJs, Typescript, Playwright
    React.js React Native Next.js Amazon Web Services
  • Flink,
    Software Engineer
    E-COMMERCE
    February 2022 - August 2023 (1 year and 6 months)
    Berlin, Germany
    Hands-on experience in building micro frontend applications using Single SPA and React JS. Involved in proposing solutions for newrequirements and driving the development.
    Actively involved in deployments, setting up CI/CDpipeline, and monitoring. Building a centralized app that could help hub operations quicker. Involved in peer-to-peer code reviews and ensure code quality. Unit testing using playwright framework. Tech Stack - React Native, ReactJs, HTML/CSS, JavaScript, NextJs, Typescript, Playwright, Single SPA, GraphQL, Agile
  • Cookd Ventures Pvt Ltd,
    Senior Software Engineer(Freelance)
    E-COMMERCE
    July 2021 - January 2022 (6 months)
    Chennai, Tamil Nadu, India
    Built the application(Cookd) fromscratch, available in Play Store andAppstore with 70k+ downloads and counting. Designed architecture for the application. Handling production deployment for IOS and Android. Managing a team of 4 members. Done 3rd parties integrations like Facebook, Mixpanel for analytics, and FreshChat SDK. Unit testing using Jest. Tech Stack: React-native, Redux toolkit, React JS, Typescript

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Education

  • Bachelor: Electronics and Communication Engineering
    Kongu Engineering College
    2017
    Bachelor: Electronics and Communication Engineering

Skill set

Categories