Senior Full Stack Engineer (m/f/x)

🌟 Shape the Future of Applied AI with Us!

Join Our Mission

At Quantagonia, our founders have built and scaled successful companies, including achieving Unicorn status. But throughout their journey, they saw a recurring problem: while optimization has the potential to solve huge planning challenges, it has always been too complex and out of reach for most businesses.That’s why we created DecisionAI—to make real-time, AI-powered optimization accessible for everyone. We’re tackling the biggest challenges of our time, from cutting kilometers and costs in logistics to solving complex distribution puzzles, mastering scheduling challenges, and enabling fascinating production optimizations.

This is your chance to bring your theoretical knowledge into real-world action and see the results of your work on the greatest playground of all: the real world.

‍Please note: You must be an EU citizen or have work authorization for the EU to be eligible for this position.

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Tasks

• Lead the development of robust applications with a focus on performance, scalability, and maintainability.
• Work across the tech stack, implementing features in both frontend and backend, with a focus on C++ and Python.
• Architect, design, and maintain cloud-based distributed systems, using modern message-broker architectures like Celery and RabbitMQ.
• Engage in HPC, including GPU programming with CUDA, to deliver efficient, high-speed solutions.
• Collaborate closely with cross-functional teams and contribute to the product roadmap with a high degree of ownership.

Requirements

• 5+ years of professional experience in full stack development or equivalent roles (Senior level is preferred).
• Public GitHub projects or equivalent work samples demonstrating your coding skills and project contributions.
• Core Skills
  • C++ (mandatory):
    • Advanced knowledge of modern C++ (C++14, ideally C++17).
    • Deep understanding of clean code principles, strong cmake expertise, and proficiency in software design.
  • Python (mandatory):
    • Strong experience setting up Python projects from scratch using modern tools and package builders.
    • Knowledge of multiprocessing and asyncio.
    • Familiarity with modern Python tools, such as hatch, uv, and ruff.
    • Expertise in building and maintaining testing infrastructure.
• Additional Skills
  • Cloud-Based Distributed Computing experience using Celery, RabbitMQ, or other message-broker architectures.
  • High-Performance Computing (HPC), including experience with CUDA for GPU programming.
  • Backend and Cloud experience, with Docker proficiency.
  • Git and CI/CD experience.
• Nice-to-Have
  • Familiarity with Rust or other programming languages.
  • Domain knowledge in Operations Research, Machine Learning, or Large Language Models (LLMs).
• Strong communication skills, team-oriented with a sense of ownership, and a strong emphasis on code quality.

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Benefits

• Real Impact: Work directly with founders and see your contributions drive tangible results.
• Learn and Grow: Gain first-hand insights into building and scaling a business.
• Career Boost: Develop skills and experiences that open doors to future opportunities.
• On-Site Perks: All-inclusive office setup in Frankfurt or Munich with some flexibility for remote work.
• Stay Healthy: Access to health and sports memberships.‍
• Team Spirit: Enjoy regular team events and offsites.

Ready to Build Something Amazing?

If you’re excited about taking on big challenges, learning at the speed of a startup, and shaping the future of Applied AI, we want to hear from you. Apply now and let’s create the future of decision-making together! 🚀

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