Senior Full Stack Next.js Developer

ZEAL Network SE

(Senior) Full Stack Next.js Developer building scalable workflows for ZEAL Network's innovative lottery platform. Collaborating with cross-functional teams to drive product improvements and performance.

Posted 7/8/2026full-timeHamburg • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

JavaScriptNext.jsReactTypeScript

About the role

Key responsibilities & impact

Shape and build a modern Next.js application from scratch, creating the technical foundation for a scalable internal platform
Take ownership of frontend topics and drive technical decisions
Work closely with product, design and backend teams in a lean, agile environment
Integrate and evolve RESTful APIs in collaboration with backend engineers
Ensure high-quality implementation of UI/UX designs with a strong focus on performance and scalability
Write and maintain tests to ensure reliability, security and performance
Contribute to deployment, monitoring and overall application stability together with DevOps
Identify and drive improvements in performance, user experience and conversion
Measure, analyze and iterate on product features based on data

Requirements

What you’ll need

Strong experience as a Senior Full Stack or Frontend Engineer with a focus on modern web technologies
Deep expertise in JavaScript, React and Next.js (App Router, Server Components, Server Functions)
Proficiency in TypeScript, HTML5 and CSS3
Hands-on experience with tools such as Tailwind CSS, React Hook Form, TanStack Query, Zod, Shadcn/UI or similar (Tailwind CSS is a must have, everything else nice to have)
Ability to write clean, maintainable and performant code and design scalable architectures
Solid experience integrating and working with REST APIs
Experience with testing strategies for frontend applications (nice to have)
Interest in using modern development tools, including AI-assisted workflows, to improve productivity and quality (nice to have)

Benefits

Comp & perks

State-of-the-art technologies and an agile environment
A modern, dynamic culture grounded in the success of a leading-edge e-commerce company.
A talented team of ambitious, like-minded colleagues where your knowledge and ideas truly make an impact.
Ongoing personal growth, supported by an annual development budget of €1,500 to invest in your professional development.
Trust and autonomy, no micromanagement, just confidence in your ability to deliver and excel.
Flexible work options with a hybrid setup focused on results.
Unlimited vacation days in addition to your yearly 30-day vacation allowance.
Opportunity for workations abroad using our WorkFlex tool.
Monthly mobility allowance of €30 to use on the mobility option of your choice (e.g., the Deutschlandticket), plus access to a company bike leasing program.
Company pension scheme, provided in partnership with Degura, to support your future financial security.
Subsidized EGYM WELLPASS membership, with a contribution of only €25 per month, giving you access to a wide range of gyms and sports options across Germany.
Monthly company events, team activities, and informal gatherings, including our popular company-wide lunches provided four days a week.

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Hard Skills & Tools

JavaScriptReactNext.jsTypeScriptHTML5CSS3REST API IntegrationTesting StrategiesPerformance OptimizationScalable Architecture Design

Soft Skills

CollaborationOwnershipProblem-SolvingAgile Methodology