ICT vacatures Leiden

Only applicants already living in The Netherlands.

Alphacomm makes large European companies more successful and financially healthier by securing their revenue. From increasing the average revenue per user, eliminating fraud in online transactions, and slashing the risk of non- and late payments, we are operating on top of our customers’ priorities.
With locations in Romania, Rotterdam, UK and Germany we operate on an international scale as the trusted partner for many large organizations in Europe. With our experience-based knowledge and our ability to connect the dots, we help our customers to secure their revenue and have fun while working with us.

We are seeking a Front-End Developer who is proficient in working with component-based React apps and Redux state management.

You’ll work closely with design, product and backend teams to build fast, accessible and reliable user experiences for our customers.

• Build, extend and maintain reusable components in React + TypeScript

• Implement and manage complex state management using Redux (RTK, slices, async thunks, selectors)

• Integrate with RESTful APIs and handle async flows (loading, error states, retries, optimistic updates)

• Translate Figma designs into performant, responsive and accessible UIs

• Ensure cross-browser/device compatibility and maintain UI consistency across products

• Collaborate with product, design and backend teams to refine requirements and improve UX

• Write clean, maintainable code and contribute to code reviews and technical decisions

• Follow accessibility standards (WCAG) for all user-facing features

• Implement unit and integration tests for critical flows (checkout, login, forms, API flows)

• 4+ years of professional experience in front-end development

• Strong proficiency in React (hooks, context, component composition)

• Mandatory: TypeScript experience (strict typing, interfaces, types for API responses)

• Solid experience with Redux (Redux Toolkit, slices, async trunks, selectors)

• Excellent understanding of HTML5, CSS3, and modern JavaScript (ES6+)

• Experience integrating RESTful APIs and managing async logic robustly

• Familiarity with Git and standard branching workflows

• Experience working with component libraries/design systems (Material UI or similar)

• Strong debugging, problem-solving skills and attention to detail

• Comfortable collaborating in an agile environment with cross-functional teams

• Experience with Next.js (SSR/SSG, routing, API routes)

• Knowledge of payment/fintech flows (3DS, error recovery, edge cases)

• Familiarity with CI/CD pipelines and deployment processes

• Understanding of web accessibility (WCAG) and applying best practices in production

• Experience with testing tools (Jest, React Testing Library, Cypress)

• Performance optimization skills (bundle splitting, memoization, Core Web Vitals)

• Experience with analytics/tagging setups (GA4, GTM, events tracking)

• Experience with Webflow pages (CMS collections, components, interactions, animations)

• A good salary

• 25 days of vacation leave

• Travel allowance

• Pension scheme, 50% paid by us

• The opportunity to contribute and be part of a fast-growing company

• Direct lines of communication

• A great place to work with a bunch of great international colleagues

Are you ready to work at a fast growing company that is at the forefront of the industry? Make the best career decision ever and send us your resume and motivation today!