Lingaro

Frontend Developer - Freelancer

Lingaro  •  Republic of Poland (Onsite)  •  1 day ago
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Job Description

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.

Lingaro

About Lingaro

You’ve got the data — now what’s next?

Many businesses are overwhelmed by data and struggle to turn it into real business impact. Lingaro empowers global enterprises to achieve measurable outcomes with data and AI.

We deliver end-to-end solutions from strategy and advisory to scalable data and AI platforms, with proven adoption across teams and processes. Our specialists turn complex data into actionable insights, advanced analytics, and AI-driven automation. You gain faster decisions, higher efficiency, and sustained business value.

Rooted in Europe and operating worldwide, Lingaro brings agility, strong engineering expertise, and deep industry knowledge. We support 75+ leading brands across 30+ countries, including highly regulated industries. As a long-term transformation partner, we help organizations become data-ready, AI-ready, and future-ready.

Learn more at lingarogroup.com

Want to know more? Check our recognitions & awards below.

🏆 Recognized as a Leader in ISG Provider Lens® 2025 – Advanced Analytics and AI Services across Europe and the US

🏆 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 2025

Industry
IT & Software
Company Size
1,001-5,000 employees
Headquarters
Warsaw, PL
Year Founded
2008
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