Senior Frontend Developer (React)

N-iX is a global company with Ukrainian roots that helps businesses across the world develop successful software products. Founded in 2002, N-iX has come a long way and increased its presence in eight countries spanning Europe, the US, and Latin America. Today, we are a strong community of 2,400+ professionals and a reliable partner for global industry leaders and Fortune 500 companies.

We are looking for a Senior React Engineer to join our client, a leader in the B2B digital marketplace for the wholesale alcohol industry. You will be part of the Marketplace Team, contributing to the development of innovative software solutions.

You will contribute to the development and enhancement of the core platform that powers our customer and partner experiences. This role focuses on designing, building, and optimizing high-performing, scalable, and maintainable micro-frontends while supporting the migration from legacy systems to modern architectures. You will also work on developing internal tools that improve operational efficiency and empower teams across the organization. Leveraging your expertise in micro-frontend frameworks, modern web technologies, and cloud-native platforms, you will enable the client to deliver seamless, reliable, and innovative solutions to marketplace users and internal stakeholders.

What you'll be doing:

• Design and implement scalable, performant micro-frontends and modular architectures using frameworks like React.
• Integrate with robust backend services, APIs, and integration frameworks to ensure seamless communication between systems.
• Build and maintain internal tools that streamline workflows and enhance operational efficiency across teams.
• Collaborate on the migration from monolithic systems to modern, modular micro-frontends.
• Apply best practices to decommission legacy systems while ensuring service continuity and performance.
• Monitor and optimize platform performance, addressing bottlenecks and improving reliability.
• Ensure the marketplace platform and tools are highly available, scalable, and cost-efficient.
• Work closely with product, design, and other engineering teams to deliver features that enhance customer and internal user experiences.
• Partner with operations and support teams to ensure platform scalability and reliability.
• Participate in Agile workflows to deliver high-quality solutions on time.

Experience

• 5+ years of experience in software engineering, preferably with customer-facing platforms or internal tools.
• Proven success contributing to front-end platforms
• Experience with system migrations or architecture transformations

Technical Skills

• Strong knowledge of micro-frontend frameworks (e.g., Module Federation, Webpack, Single-SPA).
• Hands-on experience with modern web development frameworks including React, Angular, or Vue.js.
• Backend expertise with Node.js, GraphQL, and REST APIs.
• Familiarity with cloud-native platforms, particularly AWS.
• Understanding of internal tooling frameworks or custom solutions for operational teams.
• Experience with Typescript.
• At least Upper-intermediate (B2) level of English is required.

Collaboration & Agile Practices

• Effective communication skills with a proven ability to work cross-functionally with product, design, and engineering teams.
• Experience with Agile methodologies, DevOps practices, CI/CD pipelines, and modern testing strategies.