---
title: 'Senior Agent Platform Engineer at Proxima Fusion'
canonical: 'https://feeny.ai/job/senior-agent-platform-engineer-proxima-fusion-munich-y4nwge7v55z7'
type: 'job'
last_seen: '2026-09-05'
---

# Senior Agent Platform Engineer at Proxima Fusion

- **Company:** Proxima Fusion
- **Location:** Munich, Germany
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-24
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.ashbyhq.com/proxima-fusion/23572dfc-9ea6-46c2-a934-630a28e05752

## Job description

## WHO WE ARE

Proxima Fusion is Europe’s fastest-growing fusion company and the continent’s best-funded fusion player, as well as the first spin-out from the Max Planck Institute for Plasma Physics (IPP). Backed by over €650M and powered by a growing team across Munich, Zurich, and Oxford, we are developing the hardware and infrastructure needed to deliver the world’s first commercial stellarator fusion power plant.

Our concept advances the most mature fusion technology out there, the Wendelstein 7-X stellarator, through two next-generation machines: Alpha and Stellaris. Our work combines stellarator optimization, advanced computation, machine learning, and high-temperature superconducting magnets to unlock higher-performance designs that were previously out of reach.

Turning these designs into a functioning fusion power plant requires excellence and ownership across every discipline, from physics and engineering to software, manufacturing, law, and business functions.

## WHY JOIN PROXIMA FUSION

- You will get to work on some of the most complex tech challenges to bring abundant, safe, clean energy to the world.
- You'll get to join and learn from an exceptional selection of accomplished and driven individuals.
- Do your life’s best work and enjoy the journey.
- Get to show that big things are possible in Europe when you assemble the best talent.

## YOUR IMPACT

- Technical owner of Proxima’s AI agent platform, turning autonomous agents into reliable everyday colleagues for physicists and engineers.
- Own the platform architecture, technical delivery, and day-to-day operation.
- Scale the platform from an early product into reliable, governed infrastructure used across the company.
- Enable agents to work across knowledge bases, write code, run simulations, and support engineering workflows.
- Work within the Enterprise AI Team Lead’s overall vision while owning how that vision is technically implemented.
- Use strong technical judgment to influence and shape the platform roadmap.
- Identify and propose new platform features based on hands-on experience and feedback from internal users.
- Build a platform that engineers and scientists can trust for real, production-level work.

## WHAT YOU WILL DO

- Own the design, delivery, and operation of our agent platform: the runtime and its primitives: durable sessions, sandboxed execution environments, long-running task execution, memory, and tool integration
- Turn a rapidly evolving agent ecosystem into stable platform building blocks: evaluate harnesses, models, and protocols as they emerge, and decide what becomes a supported primitive versus a passing experiment
- Co-Design the integration layer that connects agents to internal and external systems, from enterprise tools to our scientific computing stack, and the standards for how tools, skills, and context are exposed to agents
- Make autonomy safe and governable: permission and approval flows with human-in-the-loop escalation, capability boundaries, audit logging, cost and token controls, and hardening against prompt injection and tool abuse
- Build the evaluation and observability layer for non-deterministic systems: session tracing, quality evals, and cost/latency visibility, so we know agents work before our users have to find out
- Operate what you build on Google Cloud with production discipline: reliability, failure handling, and observability
- Work directly with demanding technical users and feed their feedback and your technical judgment into the platform roadmap you shape together with the team lead

## WHO YOU ARE

Must have

- You have 5+ years of software engineering experience, with real depth in Python and distributed backend systems
- You have architected, built, and operated production-grade agentic or LLM systems well beyond the prototype phase
- You know the current agent ecosystem hands-on: MCP, agent SDKs and CLIs, multi-agent orchestration patterns, sandboxed code execution and have formed opinions on where the abstractions should sit
- You have run production workloads on Kubernetes and a major cloud (ideally GCP), and know what it takes to keep stateful, long-running services alive
- You treat evaluation and observability as platform features, not afterthoughts
- You take security seriously as a design constraint
- You think in platforms and internal products
- You are a low-ego, high-clarity communicator who can work directly with expert users and build consensus across teams
- You have experience with infrastructure as code (Terraform) and CI/CD

## Nice to have

- Experience with model gateways and routing
- Exposure to scientific or high-performance computing: batch schedulers, HPC clusters, or simulation-heavy environments
- Open-source contributions to AI/agent tooling
- A track record of technical mentorship

## INTERVIEW PROCESS

- Recruiter Interview (30-60 min)
- Technical Screening (30 min)
- Technical Panel (3x60 min)
- CEO call (30min)

*This role sits at "L3" of our framework, please inquire during the recruitment process for further information.

At Proxima Fusion, our mission is bold: making limitless clean energy a reality. To get there, we need a high-performing, diverse team that brings different perspectives, challenges assumptions, and builds together with purpose. We know that diversity of thought and experience leads to better ideas, stronger execution, and a more resilient team. We don’t look at how you identify, what you look like, who you choose to worship or what ethnicity you are. We care about what you can bring to the table.

## About Proxima Fusion

## Company Overview
- **One-liner**: A European fusion energy company building quasi-isodynamic stellarator power plants to deliver clean, safe, and abundant energy.
- **Entity Type**: Private (Series A – €130M raised in June 2025 plus €15M extension in September 2025)
- **Headquarters**: Munich, Germany (additional offices in Zürich, Switzerland and Oxford, United Kingdom)
- **Founded**: April 2023
- **Founders**: Francesco Sciortino, Lucio Milanese, Jorrit Lion, Jonathan Schilling, Martin Kubie

## Core Business
- **Primary industry**: Fusion energy (energy production)
- **Target customers**: Energy companies, grid operators, and technology partners (B2B / Enterprise)
- **Mission**: “Enabling human ambitions in a future with fusion energy” – providing abundant, clean, and safe energy for all.

## Products & Services
- **Alpha Demonstration Stellarator**: A prototype stellarator designed to demonstrate net energy gain in steady-state, planned for first plasma around 2031.
- **Stellaris Fusion Power Plant Concept**: A peer-reviewed, first-of-its-kind design for a commercial stellarator fusion power plant, targeting grid deployment in the late 2030s.
- **Stellarator Model Coil (SMC)**: A demonstration high-temperature superconducting (HTS) magnet completed to validate coil technology for Alpha and Stellaris.
- **Core Technology**: Quasi-isodynamic (QI) stellarator design combined with computational optimization, HTS magnets, and rapid prototyping – all leveraged from the record-breaking Wendelstein 7-X experiment.

## Market Standing
- **Valuation / Market Cap**: Not publicly available (private company)
- **Key Metric**: Total funding ~€200M (≈$230M) in public and private capital, including pre-seed (€7.5M), seed (€20M), Series A (€130M + €15M extension), and additional grants from the European Innovation Council and the German Federal Ministry of Education and Research.
- **Notable Investors / Partners**: Plural Platform, UVC Partners, redalpine, Bayern Kapital, DeepTech & Climate Fonds, Max Planck Foundation, High-Tech Gründerfonds, Visionaries Club, Wilbe. Strategic partners include the Max Planck Institute for Plasma Physics (IPP), Karlsruhe Institute of Technology (KIT), and Paul Scherrer Institute (PSI).
- **Growth Signals**: Team grown from founding to 100+ world-class scientists, engineers, and operators; completion of the Stellarator Model Coil; publication of the Stellaris power plant concept; convening an Industrial Development Board to scale European fusion supply chains; appointment of CFO Sergei Galperin (June 2026); integration of AI-driven design methods.

## Competitive Advantages
- **QI Stellarator approach**: Toroidal currents cancel to zero, enabling inherently stable, continuous operation without the plasma disruptions that challenge tokamaks.
- **Direct lineage from W7-X**: As the first spin-out from the Max Planck Institute for Plasma Physics, the team builds on decades of stellarator research and the world’s most advanced stellarator experiment.
- **Simulation-first + rapid prototyping**: Combines cutting-edge computational design with HTS magnet technology to accelerate development timelines.
- **Top-tier talent pool**: Team members from Max Planck IPP, MIT, SpaceX, Tesla, McLaren, Google X, EPFL, Stanford, Cambridge, and other leading institutions.
- **Deep European ecosystem ties**: Close collaboration with public research institutes, industrial partners, and government funders.

## Strategic Focus
- **Near-term (2026–2031)**: Complete the design and construction of the Alpha demonstration stellarator, demonstrate net energy in steady-state, and advance HTS magnet technology through continued R&D.
- **Mid-term (2030s)**: Scale from Alpha to the Stellaris fusion power plant, targeting first electricity to the grid in the late 2030s.
- **Long-term**: Establish a new clean energy infrastructure by industrializing stellarator power plants and securing supply chains across Europe.

## Why Work Here
- **Mission with impact**: Tackle one of humanity’s greatest challenges – unlimited, clean, and affordable energy.
- **High-performance culture**: Described as a “professional sports team” where success depends on placing the right person in the right role with real ownership from day one.
- **Collaborative environment**: Work alongside exceptional peers from top tech, science, and engineering organizations; take on meaningful responsibility early.
- **Locations**: Offices in Munich (HQ), Zürich (PSI campus), and Oxford (Culham Campus) – likely on-site given the hands-on nature of fusion R&D.
- **Diverse disciplines**: Opportunities for engineers, scientists, operators, and business roles in a fast-growing deep-tech startup.

## Sources
1. [proximafusion.com](https://www.proximafusion.com/)
2. [proximafusion.com/about](https://www.proximafusion.com/about)
3. [proximafusion.com/careers](https://www.proximafusion.com/careers)
4. [jobs.ashbyhq.com/proxima-fusion](https://jobs.ashbyhq.com/proxima-fusion)
5. [en.wikipedia.org/wiki/Proxima_Fusion](https://en.wikipedia.org/wiki/Proxima_Fusion)

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