Frontend Engineer

Mid • Hybrid

12,000 - 17,500 PLN

Poznan, Poland

About the role

We are looking for a Front-end Engineer to join our Subscriber Experience Squad (SXP) - a high-impact, cross-functional team responsible for the full subscriber lifecycle, from checkout to account management. In this role, you will focus on building high-quality user interfaces that directly impact conversion, retention, and overall user experience. You will work closely with product leaders and engineering teams to deliver reliable and scalable front-end solutions.

AI is our foundation. We are an AI-first company. You’ll go beyond traditional coding by weaving AI into your daily workflow to handle repetitive tasks and speed up development. This role is for someone who uses AI tools to boost shipping velocity while maintaining high standards for code quality and system reliability.

Your mission

Build intuitive, responsive, high-performing user interfaces in an AI-first development culture that enhance subscriber experiences across key journeys.

Your Responsibilities

Master and evolve our AI-first development workflows
Build and maintain front-end applications using React and TypeScript
Implement user-facing features based on product and design requirements
Write clean, maintainable, and well-tested code
Contribute to component libraries and reusable UI patterns
Collaborate closely with designers, product managers, and engineers
Ensure high quality through automated testing (unit and integration)
Debug and fix issues across different browsers and devices
Continuously look for ways to improve user experience and development practices

The ideal candidate will have the following Competencies

Practical use of AI tools in day-to-day development
2-4 years of experience building front-end applications with React
Solid knowledge of TypeScript and JavaScript fundamentals
Good understanding of HTML, CSS, and browser behavior
Experience writing automated tests (unit, integration) and testing frameworks (e.g. Playwright)
Experience building responsive, user-friendly interfaces
Understanding of backend concepts (APIs, server-side logic)
Strong attention to detail and code quality
Good communication skills in English (B2+ minimum)
Proactive attitude and willingness to learn

Nice to have

Experience with Next.js and server-side development
Familiarity with AWS or other cloud environments

We offer

Flexible working hours and form of employment
100 % paid sick leave within the agreed limits
Events and celebrations
Work with an international team of well-rounded experts
Work on unique, market-leading SaaS products with clients all over the world
Work closely with people who value diversity, hard work, and friendly relationships

Cleeng sp. z o.o.

Cleeng sp. z o.o., founded in 2011, is a SaaS technology company specializing in Subscriber Retention Management® solutions for direct-to-consumer (D2C) businesses. The company provides an integrated platform that unifies the subscriber experience across web and mobile applications, offering tools such as web payments, in-app subscriptions, recurring billing, and AI-powered customer support. Cleeng’s mission centers on helping businesses maximize customer lifetime value, reduce churn, and drive sustainable revenue growth. Positioned as an AI-first organization, it embeds artificial intelligence into its products and internal workflows. Headquartered in Amsterdam with offices in Poznań, Manila, and New York City, Cleeng operates with an international team representing over 16 nationalities. Its client base includes prominent global brands such as the NHL, Big Ten Network, The Weather Channel, TOD/BeIN, and NHK, reflecting its strong presence in the digital media and subscription-based industries.

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