Frontend Developer building intuitive and seamless cross - platform sports betting applications at iGaming startup. Focusing on coding, debugging, and enhancing user experience in Lisbon.
About the role
- Senior Frontend Engineer developing user experiences at E WIE EINFACH in Köln. Responsible for frontend development and enhancing digital platforms using React and Next.js.
Responsibilities
- Build and maintain core customer journeys such as login, account management, billing & payments, and self-service features
- Develop with Next.js / React and TypeScript using a component-driven approach
- Design web experiences that work seamlessly on both desktop and mobile devices
- Collaborate on mobile app experiences in React Native and ensure a consistent UX across all channels
- Integrate frontend applications with API-driven backends (GraphQL / REST)
- Apply schema-based typing and validation (e.g., Zod) for reliable data handling and consistent interfaces between frontend and backend
- Work closely with UX/UI design, backend, QA, and platform teams in Agile/Scrum setups
- Ensure performance, accessibility, and quality across browsers and devices
- Contribute to frontend standards, testing strategies, and CI/CD quality processes
- Use AI agents for autonomous code generation and focus on strategic reviewing, architecture, and efficient human-in-the-loop processes
Requirements
- Several years of experience building production-ready frontend applications with React / Next.js and TypeScript
- Strong frontend fundamentals: component architecture, performance optimization, accessibility, and modern CSS
- AI-native developer mindset: proficient with agent-driven workflows using tools like Claude Code, Cursor (Composer), or Windsurf (Cascade)
- Experience with API-first platforms and authentication flows
- Pragmatic approach to testing and secure working practices in CI/CD-driven teams
- Strong communication skills in German and English and a pronounced ownership mindset
- Nice to have: experience with GraphQL, experience developing configurable or white-label products, familiarity with Mobile-First strategies (PWA) and/or cross-platform approaches (Flutter, React Native), or willingness to learn
Benefits
- A highly motivated team with flat hierarchies and short communication paths
- An office in the heart of Cologne and the option for hybrid work
- Lots of fun at work and within the team
- Competitive compensation and 30 days of vacation per year
- Subsidy for the job ticket (public transport pass) and free parking spaces
Job title
Job type
Experience level
Salary
Not specified
Degree requirement
Tech skills
Location requirements
Front - end Developer creating and maintaining web applications using React and Next.js at IntellectEU. Collaborating with QA engineers and architecture teams in a hybrid work environment.
Frontend Software Engineer leading the transition to modern Angular architecture for cloud - based solutions. Collaborating with teams to deliver secure, user - focused applications in a rapidly evolving environment.
Front End Developer implementing dashboards and data visualizations for government supply chain decision - making. Working under architectural governance to create actionable user interfaces.
Collaborating with technology team to assess user needs and resolve issues. Direct communication with candidates for humanized service and KPI management.
Software Developer focusing on user needs and technology team collaboration at a startup. Creating and managing quality KPIs for service efficiency.
Front - End Developer designing web applications to enhance flexible working at OfficeRnD. Collaborating with stakeholders to innovate and implement user - centric features.
Senior Frontend Developer creating high - performance user interfaces for Vivo. Responsible for defining application architecture and mentoring junior developers in an agile setting.
Staff Frontend Engineer for AI Copilot focusing on developing and delivering AI - enhanced customer service solutions. Collaborating across teams to build accessible and performant user interfaces with a focus on TypeScript and React.
Front - End Software Engineer developing KinaTrax data visualization tools for sports teams. Collaborating with product development team to enhance athlete performance data solutions.