Senior Fullstack Engineer (f/m/x)

This is a company built for growth.

When you join exmox, you're stepping onto a global, highly competitive playing field, solving real problems in environments that push you beyond your comfort zone. You'll work on real systems at a big scale, building high-performing consumer products used by millions. We move fast, cut the noise, and focus on what actually matters, because in our industry, speed wins. 

We're rapidly scaling one of the most exciting innovations in mobile gaming: a rewarded user engagement and acquisition platform that helps publishers acquire and retain players through rewarding experiences. Our products are data-driven by design, powered by event-driven architectures, complex business logic, and quick feedback loops, with decisions informed by data and experimentation, not gut feeling.

As Senior Fullstack Engineer (f/m/x) you won't just be "coding tickets" or maintaining legacy systems. We look for people with an engineering mindset and entrepreneurial ownership, you build it, you own it, working close to product and data and seeing the impact of your work in production. At exmox, we're embracing AI as part of how we work, not just what we build. We use AI tools to work smarter, cut down on repetitive tasks and spend our time where it actually moves the needle. If that mindset speaks to you, you'll fit right in.

If you're excited by complex systems, high traffic, data-driven decisions, and the chance to grow by solving challenging problems, we want to hear from you.

What You’ll Own

Backend Development:

• API Development: Implement API development best practices, with a preference for familiarity with GraphQL.

• Integration: Integrate and consume REST APIs for back-end communication.

• Collaboration: Work with UX and UI design specialists to ensure back-end solutions support innovative and user-oriented ideas.

• Containerization: Utilize Docker and Kubernetes for containerization and orchestration (nice-to-have).

• Systems Efficiency: Ensure efficient back-end processes and distributed systems.
  
  

Frontend Development:

• User Solutions: Implement innovative ideas and user-oriented solutions with UX and UI design specialists.

• Frontend Skills: Utilize and enhance skills in CSS, JavaScript, and TypeScript.

• Application Development: Develop and maintain applications using Vue or Nuxt and at least one responsive framework (e.g., Tailwind).

• API Integration: Ensure seamless integration with REST and GraphQL APIs for front-end communication.

• Full Stack Experience
  5+ years of hands-on experience as a software engineer, building scalable, reliable, and high-performance full-stack applications.

• API & Backend
  Strong proficiency in API development and integration (REST and GraphQL), with Python as the primary language (Go is a plus).

• Frontend & UI
  Proficient in JavaScript/TypeScript, CSS/SCSS, and frameworks such as Vue or Nuxt. Experienced with responsive frameworks like Tailwind and familiar with UI animations and transitions.

• Systems & Architecture
  Practical understanding of distributed systems, high-volume workloads, and efficient backend/frontend processes. Experience with Docker, Kubernetes, and cloud-based deployment and orchestration is desirable. Skilled at designing maintainable and performant systems.

• Problem-Solving & Ownership
  Strong analytical skills with attention to detail. Able to tackle complex full-stack challenges holistically, prioritize effectively, and deliver high-quality solutions. Takes ownership of the full development lifecycle and ensures work balances short-term delivery with long-term system health.

• Collaboration & Communication
  Good communication skills in English. Comfortable working closely with UX/UI designers, product teams, QA, and backend engineers to deliver high-quality, user-focused products.

• Speed is the feature. Speed beats rocket science. We move fast, test fast, and multiply our pace with AI, because action creates information and small wins compound. A fast failure is a lesson we learn from, a slow one is a problem we can't afford.

• Focus on the essential. Done is better than perfect. We stay focused on what actually moves us forward and protect people's time from anything that doesn't. We're direct in how we communicate too, no rambling, no unnecessary detail.

• See it. Own it. Solve it. The first to see it is best placed to fix it. We're not a place for comfort, we're a place for doers. "Not my job" isn't in our vocabulary, if you spot something, you help make sure it gets solved.

• Respect others. Trust multiplies. Respect is non-negotiable. We disagree with ideas, never with people. Trust here is built the same way it is anywhere, through consistency, a thank you, a moment of listening, and owning your mistakes.

• Perks that help you focus on what matters. Transport subsidy, learning budget, wellness and gym, workation, bi-weekly team lunches, and more. The perks are great, but the real reason people join and stay is the challenge, the ownership, and the drive to win together.

Please note: this is not a remote only position, we offer you a flexible hybrid model here in Hamburg, Germany - working from home on Mondays & Fridays, coming to the office on Tuesday, Wednesday & Thursday!