About the job

Overview of the Role

As a React.js Engineer in our Martech Tribe, you will play a key role in developing and maintaining internal applications that power our marketing technology stack. You will work closely with the Frontend Team Lead, Principal Engineer, and fellow engineers to deliver responsive, high-quality, and well-tested user interfaces using React and TypeScript. The role requires independent task execution, strong ownership of code quality and testing, and close collaboration with backend engineers, QA, designers, and product stakeholders to ensure seamless integration and a great user experience for internal teams across multiple markets.

What You'll Do:

Development & Technical Delivery

• Build Production-Grade Internal Applications: Develop, maintain, and enhance React and TypeScript applications used by internal stakeholders, ensuring code quality, reusability, and scalability across the tribe's product surface.
• Deliver High-Quality Single-Page Applications: Build and optimize SPAs with a strong focus on performance, responsiveness, and a smooth user experience across browsers and devices.
• Contribute Across the Stack: Extend your work into NestJS (TypeScript) backend services when required to support frontend features, API integrations, or shared functionality, contributing to end-to-end delivery.
• Integrate Frontend with Backend APIs: Consume and integrate REST APIs effectively, handling asynchronous flows, error states, and data shaping to deliver reliable user-facing functionality.
• Translate Designs into Reality: Collaborate with UX/UI Designers and Product Owners to turn product requirements and designs into clean, accessible, and responsive interfaces that serve the needs of internal users across different markets.
• Participate in Technical Design: Contribute to technical design discussions, propose solutions to complex problems, and help shape the architecture of features within the team's scope. Take part in estimation and sprint planning activities.

Code Quality & Engineering Practices

• Write Robust, Tested Code: Take ownership of testing your own work — write unit, integration, and component tests as part of your standard development workflow. Treat tests as a first-class part of the deliverable, not an afterthought.
• Maintain Clean, Reusable Code: Produce code that is readable, maintainable, and aligned with the team's coding standards. Favour reusable components and scalable patterns wherever possible.
• Engage in Peer Code Review: Actively review your peers' pull requests with constructive, thoughtful feedback, and welcome the same in return. Use code review as a tool for shared learning and quality improvement.
• Optimize for Performance & UX: Pay close attention to frontend performance, rendering efficiency, bundle size, and overall user experience, recognizing that internal users rely on these tools to do their jobs effectively.
• CI/CD Awareness: Work effectively with CI/CD pipelines, ensuring your changes are deployable, well-tested, and aligned with the team's delivery workflow.
• Debug and Resolve Issues: Investigate, debug, and resolve frontend-related issues across environments, supporting both new development and ongoing maintenance of existing applications.

Collaboration & Communication

• Work Within the Tribe: Collaborate closely with the Team Lead, Principal Engineer, QA Engineers, DevOps, Product Owners, and Designers to deliver features end-to-end.
• Coordinate Across Stakeholders: Engage with internal stakeholders from different markets and functions to understand requirements, surface edge cases, and ensure solutions fit real-world workflows.
• Knowledge Sharing: Share knowledge openly with the team — through documentation, pairing, demos, or informal discussion — and contribute to a culture of continuous learning.
• Raise Issues Early: Communicate blockers, risks, or concerns proactively to the Team Lead and Scrum Master so the team can adapt quickly.
• Contribute to UI/UX Improvements: Provide thoughtful input on usability, accessibility, and user experience, helping continuously improve the products the tribe delivers.

What We're Looking For:

• 3+ years of professional experience in frontend application development.
• Strong, hands-on expertise in React and TypeScript, including solid understanding of state management, component architecture, hooks, and modern frontend tooling (e.g., Vite, Webpack).
• Solid understanding of single-page application (SPA) architecture and component-based design.
• Working experience with NestJS (TypeScript), or a clear willingness and demonstrated ability to contribute to NestJS-based backend services.
• Hands-on experience writing automated tests (e.g., Jest, React Testing Library, Vitest, Playwright) as part of everyday development workflow — this is a must-have.
• Experience consuming REST APIs and integrating frontend applications with backend services.
• Knowledge of responsive design principles, cross-browser compatibility, and accessibility.
• Understanding of frontend performance optimization techniques.
• Proficiency with Git and collaborative development workflows (feature branching, pull requests, code review).
• Experience working with CI/CD pipelines.
• Strong problem-solving skills, attention to detail, and a passion for delivering high-quality software.
• Ability to work independently with minimal supervision, while also collaborating effectively within a cross-functional Agile team.
• Strong communication and interpersonal skills, with good time management and task prioritization.
• Willingness to receive feedback and continuously improve.
• English level: B2 or higher (written and spoken).

Bonus Points For:

• Experience in Martech (marketing automation, CDPs, personalization platforms, analytics tooling, A/B testing, tag management, or similar).
• Experience building internal tools, admin panels, or data-heavy interfaces (tables, dashboards, configuration UIs).
• Basic understanding of Docker, containerization, and deployment processes.
• Experience with cloud platforms (AWS, Azure, GCP).
• Experience contributing to or maintaining design systems / shared component libraries.
• Experience working in a Tribe-based organizational structure.

About Flutter CEE

We are Flutter Central & Eastern Europe (CEE).

As a proud member of the Flutter family - a global leader in sports betting and iGaming - we are building one of the Group’s most dynamic tech and product hubs in Central and Eastern Europe. We aren’t just here to participate. We’re here to change the game.

By uniting local powerhouses like MaxBet, Adjarabet.com, and Adjarabet.am, we combine deep regional expertise with the scale and strength of Flutter’s global platforms. We’re setting a new standard for entertainment, responsibility, and innovation - powered by real customer signals that shape everything we build.

Settling for the status quo isn’t in our DNA. We build systems designed to scale.

We’re moving faster, thinking bigger, and putting our customers exactly where they belong: at the heart of every decision. We start by listening to our customers and the communities we serve. What we see, hear, and learn become clear signals, and those signals quickly shape product decisions, better experiences, and responsible innovation.

Technology powers our ambition. The Signature System - our operating model - makes our signal-led approach repeatable and scalable across markets. It’s how we move fast and grow with confidence.

As part of Flutter, we benefit from the Group’s collective advantage - the Flutter Edge. It allows us to identify success in one market, replicate it across brands, and implement proven ideas quickly - with customers always at the forefront.

We’re a team of thousands, driven by a challenger mindset and a shared commitment to lead. We are shaping the future of iGaming in Central and Eastern Europe right here, right now, and our technology and product teams are defining what responsible innovation looks like in practice - not just in theory.

We are Flutter Central & Eastern Europe (CEE).

Built on experience. Built to lead.

Local champions. Global infrastructure.

Why choose us

At Flutter CEE, people have access to vast opportunities for career growth and self-development. Our employee benefits package goes far beyond offering the minimum: We support our people in becoming their best version at work and beyond - and our benefits reflect that commitment.

These are some of the benefits included in our employee package:

• Generous annual leave
• Hybrid work
• Individual health insurance
• Paid sick leave
• Paid maternity & paternity leave
• Family reward
• Performance & referral bonuses