Logo Kayzen

Fullstack Engineer

Neu

Kayzen

Job

  • Level
    Senior
  • Job Feld
    Web, Software, Full Stack
  • Anstellung
    Vollzeit
  • Vertragsart
    Unbefristetes Dienstverhältnis
  • Ort
    Berlin
  • Arbeitsmodell
    Full Remote, Hybrid, Onsite

    • Job Zusammenfassung

    In dieser Rolle entwickelst du hochperformante UIs und integrierst APIs, während du mit AI-unterstützten Tools arbeitest und in enger Zusammenarbeit mit verschiedenen Teams innovative Features umsetzt.

    Job Technologien

    Deine Rolle im Team

    • We are looking for a coding-first Fullstack Engineer who thrives on turning complex product requirements into high-performance UIs.
    • You should be comfortable working across the stack, contributing to architecture discussions, and be an early adopter of AI-assisted engineering (e.g., Claude Code, Cursor, Copilot) in your daily coding workflow.
    • Design, build, and maintain high-quality features across the Fullstack stack, from UI to API integration.
    • Write clean, well-tested, production-ready code and actively participate in code reviews.
    • Collaborate closely with Product, Design, QA, and Backend teams to deliver cohesive, user-centric features.
    • Contribute to technical decisions around architecture, tooling, and best practices within the team.
    • Take ownership of features end to end, from planning through deployment and monitoring.
    • Integrate AI-powered coding agents and automated LLM-based testing into your daily development cycle.
    • Contribute to building 'AI-First' UI patterns, working alongside the LLM Platform team on generative, prompt-driven interfaces.
    • Stay current with emerging AI-assisted development tools and bring relevant ones back to the team.
    • Break down assigned product requirements into clear, actionable engineering tasks.
    • Deliver work reliably within sprint commitments, flagging blockers or scope changes early.
    • Balance new feature delivery with addressing technical debt in the codebase you work on.

    Unsere Erwartungen an dich

    Qualifikationen

    • Solid expertise in at least one major framework (React, Angular, or Vue) and its ecosystem.
    • Strong understanding of HTML5, CSS3, responsive design, and cross-browser compatibility.
    • Good grasp of Fullstack performance optimization, including bundle size, rendering, lazy loading, and caching strategies.
    • Working knowledge of Fullstack testing methodologies, unit, integration, and end-to-end (Jest, Cypress, Playwright, or similar).
    • Comfortable working with design systems and shared component libraries.
    • Solid understanding of APIs, RESTful services, GraphQL, and system design fundamentals.
    • Ability to give and receive constructive feedback through code reviews.
    • Good communication skills, able to explain technical decisions clearly to teammates and stakeholders.
    • Bias for shipping and iteration, you deliver incrementally and learn from real users.
    • Comfortable with ambiguity and rapid change in a fast-paced environment.
    • Thinking in terms of leverage and reuse, not one-off solutions.
    • Pragmatic about trade-offs between perfectionism and speed of delivery.

    Erfahrung

    • 5+ years of professional Fullstack development experience with modern JavaScript/TypeScript.
    • Experience building data-heavy UIs, ideally including real-time data visualization.
    • Experience with state management patterns (Redux, MobX, Zustand, or similar).
    • Experience using AI-assisted development tools (e.g., Claude Code) to boost engineering productivity.
    • Experience contributing to Fullstack architecture decisions on production applications.

    Unser Angebot

    • Exceptional career growth and learning opportunity.
    • A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market.
    • A fun, driven, and multinational team located across Germany, India, UK, Argentina, Ukraine, Turkey, Spain and many more countries.
    • A flexible work-from-home arrangement.
    • A 500-dollar home-office setup budget.
    • A 1000-dollar annual learning and development budget.

    Themen mit denen du dich im Job beschäftigst

    Job Standorte

    • Standort Berlin

      Deutschland

    Das ist dein Arbeitgeber

    Kayzen

    Kayzen

    Kayzen / Realtime Technologies GmbH ist ein modernes Unternehmen mit Sitz in Berlin, das eine mobile Demand-Side-Plattform für programmatische Werbung bereitstellt. Diese Plattform hilft Werbekunden, erfolgreiche Kampagnen für Akquise, Retargeting und Performance-Marketing zu realisieren. Kayzen legt besonderen Wert auf Performance, Transparenz und Kontrolle im Kampagnenmanagement und unterstützt Teams aus Apps, Agenturen und Marken bei ihrem datengetriebenen Wachstum.

    Description

  • Unternehmenstyp
    Startup
  • Arbeitsmodell
    Full Remote, Hybrid, Onsite
  • Branche
    Werbung, Marketing, PR
    • Logo Kayzen

    Fullstack Engineer

    Kayzen
    Ort
    Berlin
    Arbeitsmodell
    Full Remote, Hybrid, Onsite
    Diversität
    Für alle Personen geeignet (m/w/d)
    Nur Englisch
    Nur Englisch erforderlich

    Weitere Jobs