Frontend Developer - Freelancer

Posted Yesterday
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Hiring Remotely in Poland
Remote
Senior level
Information Technology • Software • Business Intelligence
The Role
Develop and maintain React and Next.js web applications for mobile and desktop. Responsibilities include improving performance, quality, responsiveness, security, and code reliability; troubleshooting bugs and bottlenecks; developing distributed microservices and REST APIs; participating in agile scrums; collaborating with cross-functional and offshore teams; testing applications; and sharing technical knowledge through workshops.
Summary Generated by Built In

Growth through diversity, equity, and inclusion. As an ethical business, we do what is right — including ensuring equal opportunities and fostering a safe, respectful workplace for each of us. We believe diversity fuels both personal and business growth. We're committed to building an inclusive community where all our people thrive regardless of their backgrounds, identities, or other personal characteristics.

Tasks

    • Design, build and maintain efficient, reusable and reliable code.

    • Build React/Next.js based applications.

    • Ensure the best possible performance, quality, and responsiveness of applications.

    • Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues.

    • Help maintain code quality.

    • Participate in the agile team scrums and effectively communicate to the team the status, roadblocks, and timelines for the task at hand.

    • Must be able to collaborate with BA, QA, developers and offshore developers to plan, design, develop, test, and maintain mobile web and desktop-based applications requested by the stakeholders.

    • Share knowledge with the team during workshops.

Requirements

    What We're Looking For:

    • 5+ years of professional experience.

    • Excellent communication skills.

    • Great ownership of assigned tasks. Self-driven and proactive approach.

    • Strong experience in JavaScript and TypeScript.

    • Thorough understanding of React/Next.js core principles along with React router, hooks, Redux (or the like) workflows, Web performance and security.

    • Developing and maintaining modern distributed micro services.

    • Development in Cloud environments (Google Cloud Platform preferred).

    • Building, testing, and troubleshooting high volume web services using API Protocols and Data Formats (REST & JSON).

    • Solid foundation in data structures, algorithms and its implementation in JS.

    • Expertise with semantic HTML.

    • Proficiency in CSS, including Tailwind, Styled Components, CSS Modules, and SASS.

    • Expertise browser-based debugging tools.

    • Experience with responsive and adaptive design.

    • experience with Testing (Unit Testing, react-testing-library, E2E).

    • Keen understanding of web application development process and standard methodologies.

    • Experience using AI-assisted development tools to improve productivity and code quality, such as Claude, GitHub Copilot, and similar tools.

    • Ability to apply AI tools effectively for coding, debugging, testing, refactoring, and documentation while maintaining high standards of code quality, security, and best practices.

    • English (B2+).

    What Will Set You Apart:

    • Previous experience in Front-end development with Docker.

    • Experience with Headless CMS (preferably Contentful).

    • Experience with NodeJS.

    • Knowledge of GraphQL.


    Missing one or two of these qualifications? We still want to hear from you! If you bring a positive mindset, we'll provide an environment where you feel valued and empowered to learn and grow.

Skills Required

  • 5+ years of professional experience
  • Excellent communication skills
  • Strong experience with JavaScript and TypeScript
  • Thorough understanding of React and Next.js core principles, React Router, hooks, Redux or comparable workflows, web performance, and security
  • Experience developing and maintaining modern distributed microservices
  • Experience developing in cloud environments, preferably Google Cloud Platform
  • Experience building, testing, and troubleshooting high-volume web services using REST and JSON
  • Strong foundation in data structures and algorithms implemented in JavaScript
  • Expertise with semantic HTML
  • Proficiency in CSS, Tailwind, Styled Components, CSS Modules, and SASS
  • Expertise with browser-based debugging tools
  • Experience with responsive and adaptive design
  • Experience with unit testing, React Testing Library, and end-to-end testing
  • Understanding of web application development processes and standard methodologies
  • Experience using AI-assisted development tools such as Claude and GitHub Copilot
  • Ability to apply AI tools for coding, debugging, testing, refactoring, and documentation while maintaining quality and security standards
  • English proficiency at B2 or higher
  • Previous frontend development experience with Docker
  • Experience with a headless CMS, preferably Contentful
  • Experience with Node.js
  • Knowledge of GraphQL
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The Company
HQ: Warsaw
1,340 Employees
Year Founded: 2008

What We Do

You’ve got the data — now what’s next? Many businesses are overwhelmed by data and struggle to turn it into real business impact. At Lingaro, we empower global brands and companies to achieve more with data. From strategy development to scalable solutions, we guide you every step of the way. We transform raw data into actionable insights with deep tech expertise, sharp business sense, and a user-centric mindset. Rooted in Europe and operating worldwide, we deliver with agility, a fresh perspective, and a proven track record. Join 75+ leading CPG companies across 30+ countries that have already transformed their business with Lingaro. Be data ready. Be business ready. Be future ready. Contact us at https://lingarogroup.com/contact_us to get started. Want to know more? Check our recognitions & awards below. 🏆 Positioned as a Leader in ISG Provider Lens™ 2025 – Generative AI Services in Strategy & Consulting and Development & Deployment 🏆 Identified as a Leader in ISG Provider Lens™ 2025 – Specialty Analytics Services in Supply Chain and Retail & CPG 🏆 Strong Performer in the Gartner® Peer Insights™ 2022 and 2024 "Voice of the Customer" reports 🏆 Major Contender in the Everest Group® 2024 Analytics and AI Services Specialists PEAK Matrix® Assessment 🏆 Listee in the Gartner® 2024 Guide to Service Providers for GenAI Initiatives 🏆 Great Place to Work® in Poland, the Philippines, and India in 2024

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