Senior Software Engineer - Photonic Applications (f/m/d)
Your mission
The future of AI computing builds on light. Q.ANT is building photonic processing systems that compute with light \- delivering a scalable, energy\-efficient alternative to transistor\-based architectures for next\-generation AI and HPC applications.
As Senior Software Engineer \- Photonic Applications (f/m/d), you'll bridge cutting\-edge photonic hardware and real\-world applications. Your work creates the evidence that photonic computing works: compelling demos, developer enablement, and direct partner collaboration that turn hardware capabilities into tangible success stories.
You'll work across the full stack – from performance\-optimized algorithms to developer\-facing documentation – helping partners, clients, and investors understand why computing with light is the future.
What You Will Do* Figure out how algorithms make a difference with photonics
- Optimize algorithms and develop performance\-critical code (Python, C/C\+\+, Rust) to demonstrate the full potential of photonic hardware through compelling performance benchmarks
- Collaborate with algorithms and software ecosystem teams to refine architectural designs and provide structured feedback from real\-world applications
- Work with external partners and clients on use cases and proof\-of\-concepts that demonstrate the value of photonic computing for AI and scientific workloads
- Build developer\-facing assets: tutorials, reference implementations, demos, benchmarks, Jupyter notebooks, and documentation that enable developers to write optimized code for photonic hardware
- Deliver public presentations, workshops, and technical briefings on photonic computing applications
- Manage stakeholder expectations and project timelines across client engagements and partner collaborations
- Contribute to Q.ANT's Open Source initiatives and developer ecosystem
Your profile
- 5\+ years in software engineering across the stack with strong proficiency in Python plus C/C\+\+ respectively Rust for performance\-critical components
- 5\+ years working in the context of external partners, clients, or developer communities
- Deep expertise in AI algorithms and scientific computing (PyTorch, JAX, TensorFlow) with understanding of hardware acceleration architectures and performance optimization
- Experience developing demos/PoCs for novel hardware platforms and creating technical enablement content for developers is a plus
- Familiarity with Open Source development workflows and tooling (GitHub, CI/CD pipelines, test frameworks, Jupyter notebooks, package distribution)
- Bachelor's or Master's degree in Computer Science, Computer Engineering, Physics, Mathematics, or related technical field
- Fluent in English; German is a plus
Why us?
- Make impact at scale: Help solve one of computing's biggest challenges – making growing demand in compute and sustainability go hand in hand
- Work on the leading edge: Photonic AI acceleration technologies that will define the next decade of computing – already validated in production HPC environments
- Own your work from day one: Shape design and code of software, client solutions, and public collaterals on your own, with direct impact on product success and the future of AI infrastructure
- Fast\-track your growth: Work on challenges with few industry precedents – every problem you solve becomes new institutional knowledge and potentially industry\-defining IP
- Be the multiplier: Your work enables entire developer communities and directly helps clients succeed with photonic computing
- World\-class team: Collaborate alongside a passionate, international, cross\-functional team of experts in photonics, processor design, and AI software
- Direct access to leadership: Work closely with the company's founders, including CEO Dr. Michael Förtsch, and the Q.ANT senior leadership team
- Collaborative culture: Innovative work environment that values technical excellence, open communication, and pragmatic problem\-solving
- Be part of history: Join at the inflection point where photonic computing transitions from research to mainstream – your contributions will shape this transformation
Ready to show the world that photonic computing works? We are looking forward to receiving your application!
*Q.ANT is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.*
About us
Who we are and what we do
Q.ANT is a deep\-tech scale\-up developing photonic processing solutions that compute natively with light and deliver a scalable alternative to transistor\-based systems. The analog co\-processors are optimised for complex computations and enable energy\-efficient performance for next\-generation AI and HPC applications. In collaboration with the Institute for Microelectronics Stuttgart IMS CHIPS, Q.ANT operates its own pilot line for photonic chips, based on the material system Thin\-Film Lithium Niobate TFLN. Q.ANT was founded by Michael Förtsch in 2018 and is headquartered in Stuttgart, Germany.
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