Senior Fullstack Engineer (f/m/x)

Permanent employee, Full-time · Hamburg

Your mission

This is a company built for growth.

At exmox, you’ll work on real systems on a big scale. We build high-performing consumer products used by millions of users, operating in a highly competitive, global mobile gaming ecosystem.

Our products are data-driven by design - powered by event-driven architectures, complex business logic, and fast feedback loops. Decisions are informed by data, experimentation, and measurable impact, not gut feeling.

We’re scaling fast and building one of the most exciting innovations in mobile gaming: rewarded user acquisition. That means distributed systems, evolving architectures, and problems that don’t have textbook answers.

As Senior Full Stack Engineer (m/f/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. You’ll work close to product and data, take responsibility for what you ship, and see the impact of your work in production.

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.

Your profile

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.

Why us?

Ambitious people, real ownership. You’ll work with driven, entrepreneurial people who care deeply about what they deliver, challenge each other openly, and own outcomes together.
We’re playing at the top, but we’re not done. Our apps rank in the top 5 of their categories. We’re determined to push further, compete harder, and earn the number one spot.
You own your own growth. Growth doesn’t happen by accident. At exmox, learning is built into the work - through responsibility, feedback, and real challenges.
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 people, and the drive to win together.

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!

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About us

We are exmox, a Hamburg-based user acquisition partner helping mobile gaming companies, and brands across other industries, scale and engage their audiences sustainably. Our innovative business model focuses on rewarded advertising, allowing users to earn rewards for engaging with client apps, driving higher engagement and revenue.

Our products are available across DACH, the US, UK, Canada, Australia & New Zealand, Scandinavia, Benelux, and France, in partnership with a wide range of industry leaders in the mobile gaming space.

With 120+ employees from 25+ nationalities, we are a diverse, collaborative, and experienced team, always looking to welcome new colleagues who want to grow with us. We look forward to meeting you!

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Your application!

We appreciate your interest in exmox GmbH. Please fill in the following short form. Should you have any difficulties in uploading your files, please contact us by mail at hr@exmox.com.