(Senior) Full-stack Developer - Backend Focus (Python)

ZEAL Network

ZEAL Network SE is a dynamic, international group of companies that has been creating exciting and innovative lottery experiences for over 20 years. As Germany’s largest provider of online lotteries through our brands LOTTO24 and Tipp24, and a trusted partner of Spain’s ONCE, the second-largest national lottery, we’re shaping the future of the lottery industry. We are passionate about driving innovation, as demonstrated by our newest brands, Freiheit+ and Traumhausverlosung, which bring fresh and exciting dreams to life. Additionally, through ZEAL Ventures, we invest in inspiring e-commerce start-ups like Omaze and DAYMADE, fueling fresh ideas and opportunities. We are looking for a (Senior) Full Stack Next.js Developer (f/m/d) to join our team and contribute to building scalable workflows, integrating backend services and defining reusable frontend patterns for a platform used by internal colleagues across multiple markets and business domains. With direct access to users, you will help shape practical solutions together with Product and UX. YOUR TASKS: * 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 WHAT YOU OFFER US: * 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) WHAT WE OFFER * State-of-the-art technologies and an agile environment (Check our Tech Radar: https://lotto24.github.io/tech-radar/) * 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. Not ticking every box or think you’ve got that unique set of skills we haven’t realized we need? Get in touch anyway, we’re always looking to add great people!

Implico

DEINE AUFGABEN Deine Mission   Als AI-driven Full Stack Developer – Public & Private Cloud entwickelst du End-to-End-Softwarelösungen über beide Cloud-Tracks hinweg: von SAP-basierten Private-Cloud-Produkten bis hin zu cloud-nativen Public-Cloud-Applikationen auf SAP BTP.  Du nutzt AI systematisch als Entwicklungswerkzeug – von AI Pair-Programming über automatisierte Codegenerierung bis hin zur Integration agentischer Workflows. Du arbeitest nicht neben AI, sondern mit AI als integraler Bestandteil deines Entwicklungsprozesses.  Du verbindest Frontend- und Backend-Kompetenz mit einem tiefen Verständnis für moderne Cloud-Architekturen, UX-Design-Prinzipien und Quality Engineering – und spielst eine zentrale Rolle bei der technologischen Differenzierung unserer Produkte.    Deine Verantwortung  Full Stack Development  * Entwicklung von Frontend- und Backend-Komponenten für SaaS-Produkte * Implementierungresponsiver,performanterUI-Systeme undskalierbarerAPI-Services * Umsetzung von Clean-Core-Prinzipien und API-first-Ansätzen * Sicherstellung von Code-Qualität durch AI-gestützte Reviews, automatisierte Tests und ATC-Standards   AI-Native Entwicklung  * Einsatz von AI Pair-Programming und Code-Generierung im täglichen Entwicklungsprozess * Integration von AI-Agenten in den SDLC (z. B. automatisierte Test-Generierung, Release-Validierung) * Nutzungvon AI-Tools für Requirements-Analyse, Dokumentationund Code-Optimierung * Enge Zusammenarbeit mit dem AI Engineer zur kontinuierlichen Verbesserung der AI-Toolchain   Dual-Track Cloud-Entwicklung  * Private Cloud: Weiterentwicklung bestehender SAP-Produkte (ABAP OO, Clean Core) * Public Cloud: Aufbau cloud-nativer Applikationen auf SAP BTP (CAP, Fiori) * Sicherstellung konsistenter Architektur muster und Design-GovernanceüberbeideTracks * Berücksichtigung von Multi-Tenancy, Skalierbarkeit und Cloud-Kosteneffizienz   UX & Interaction Design  * Verantwortung für User-Experience-Strategie und Design-System-Konsistenz innerhalb des PODs * Gestaltung AI-gestützter Interaktionsmuster und agentischer UX-Workflows * Erstellung und Verfeinerung von Fiori-Wireframes und UI-Komponenten mit AI-Agent-Unterstützung * Sicherstellung von Usability, Accessibility und UX-Kohärenz über Produktlinien hinweg   Quality Engineering & DevOps  * End-to-End-Verantwortung für Qualität innerhalb des Development PODs * Definition derTeststrategie,Orchestrierung AI-generierter Testsuiten und Validierung von Randfällen * Aktive Mitgestaltung von CI/CD-Pipelines und automatisierten Deployment-Prozessen * Implementierungvon Shift-Left-Quality-Gates und automatisierten Regressionstests * Erstellung technischer Dokumentation (SDD/TDD) mit AI-Unterstützung   Organisatorische Einordnung  * Embedded in einem Public Cloud Development POD (AI-nativ,schlankeStruktur) * Enge Zusammenarbeitmit: * Technical Architect * Senior AI Engineer * Solution Architect * Product Owner / Product Management * Platform & Release Management * Keine disziplinarische Führungsverantwortung DEIN PROFIL * Mehrjährige Erfahrung in der Full-Stack-Entwicklung moderner Web-Applikationen * Erfahrung mit SAP-Technologien (ABAP OO, SAP BTP, CAP, Fiori/UI5) oder starke Bereitschaft zur Einarbeitung * Praktische Erfahrung mit AI-gestützten Entwicklungstools (z. B. GitHub Copilot, Claude, Cursor) * Fundierte Kenntnisse in modernen Frontend-Frameworks und Backend-Technologien * Verständnis von Cloud-nativen Architekturen, CI/CD und DevOps-Prinzipien * Ausgeprägtes UX-Bewusstsein und Erfahrung mit nutzerzentrierten Designprozessen * Vertrautheit mit Test-Automation-Frameworks und Quality-Engineering-Praktiken * Erfahrung mit Clean-Core-Entwicklung und API-first-Ansätzen von Vorteil * Hohe Eigeninitiative,Lernbereitschaft und Teamfähigkeit in einem agilen Umfeld Warum diese Rolle wichtig ist   Du bist die Brücke zwischen unserer bestehenden Private-Cloud-Welt und dem Aufbau einer cloud-nativen Zukunft auf SAP BTP.  Als eines der ersten Mitglieder unseres Public Cloud PODs vereinst du Entwicklung, Design und Qualität in einer einzigen, AI-gestützten Rolle – und beweist damit, dass ein schlankes, hochkompetentes Team die Leistung eines traditionellen Teams um ein Vielfaches übertreffen kann.  Durch den konsequenten Einsatz von AI im Entwicklungsprozess steigerst du Produktivität, Code-Qualität und Innovationsgeschwindigkeit – und trägst entscheidend dazu bei, Implico als AI-native Engineering-Organisation zu positionieren. WARUM WIR? * Wir unterstützen mobiles und flexibles Arbeiten – auch aus dem Ausland. * Unser Arbeitszeitkonto hilft dir, Beruf und Privatleben in Einklang zu bringen. * Ein Betriebsrat, der dir mit Rat und Tat zur Seite steht. * 30 Tage Urlaub im Jahr sind für uns selbstverständlich. * Wir fördern deine Entwicklung durch unser integriertes Karrieresystem. * Fort- und Weiterbildung ist uns sehr wichtig und wird bei uns offen praktiziert. * Konfiguriere jede Art von JobRad – oder mehrere auf einmal. * Veranstaltungen fördern unsere offene und teamorientierte Kultur. * Du wirst mit internationalen Kollegen und Kunden zu tun haben.   Wir entwickeln nicht nur Systeme, sondern Zukunft. Werde Teil unseres Weges.

OH-SO

WHAT TO EXPECT We are a startup digital agency, and no two projects, clients, or even days look the same. In ecommerce we build on Shopify and Liquid and Next.js, with custom AWS microservices and apps that take Shopify well past the defaults.  On the marketing side we build highly customised sites in Next.js and React, with careful design and animation and a real focus on how the page performs and feels.  In automotive we build full platforms, from stock-car locators to configurators and more. Across all of it, we bring AI into the work through our own products. Here nothing will be fixed. You will work across changing projects and settings, on long builds that run for months and shorter spikes to figure out how a business can actually use AI, and you will help us rethink how agency work is done. Sound like your kind of place? Here is what we need from you. YOUR COMPETENCIES Mindset Is your goal to deliver great software, whether the problem is easy or hard? Do you push deeper than most to find the right solution, not just the first one that works? Then you are the person we need.  Responsibility You own what you build, all the way through, not just until it ships and becomes someone else's problem. The parts that go smoothly and the parts that get messy are both yours to see through. You bring your ideas and your curiosity, you use AI to build better and faster, and you stand behind what you put your name on. Drive You will not know everything yet, and that is fine. What we cannot teach is drive. We bring the tools and the guidance. You bring the push to grow fast, understand what you build, and keep reaching past what you know. What you bring to the table: * You work across crafts, not in a corner. You are close with developers, designers, and strategists, and you would rather build in the open than behind a wall. * You make the team better. You speak up when something can be sharper, and you share what you learn instead of sitting on it. * You care whether the client wins. You focus on the quality of the product and the experience, not just the ticket in front of you. WHAT YOU CAN LOOK FORWARD TO What you will actually do: We build complex, end-to-end products for both big-names and niche clients. You will own the frontend side of that work, plus the bits right next to it. Day to day, that means: * Turning designs into real interfaces in React and Next.js. * Building small pieces of UI and the logic behind them on your own, and taking on medium ones with a more senior engineer alongside you. * Working in an responsive team with clean tickets, clear updates, and knowing when to push on alone and when to ask for help. * You’re enjoying being part of a team, not a remote desk which prefers to work in isolation most of the time. The tech stack you will work with: * Languages and frameworks: React, Next.js, TypeScript, HTML, CSS * APIs: REST and GraphQL * Delivery: Existing CI/CD practices * AI tooling: Claude, Cursor, Pi, Antigravity, plus your and our own Skills and MCP setup Who you will work with We are a bunch of colleagues originally from similar backgrounds who got tired of how things were usually done and set out to find better ways. That is the whole reason this company exists, and it is still what we are doing. We are not a place of rockstars and egos. People here ask questions out loud, show rough work without flinching, and would rather help each other get something right than look clever alone. We push each other, in the good way, and we do not take ourselves too seriously while we are at it. You would be joining that. You’ll work closely with the crafts, designers and strategists, and just as easily with the people steering the projects and the business. There is no wall between you and any of it. Take on the parts you are ready for, and when you want more, a pitch, a client conversation, a bigger call, speak up at the right moment and the door is open. Smaller team. More ownership. Bigger work.