Snr Backend Engineer

Proxima Fusion

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. TEAM AND ROLE * Architect a breakthrough energy technology – Play a defining role in designing and integrating the systems that will power the world’s first commercial stellarator fusion plant, influencing decisions that shape the future of clean energy. * Solve some of the most complex engineering challenges in fusion – Work across magnet design, HTS technology, manufacturing, structural integration, and controls, turning cutting-edge science into real hardware * Move fast and build what matters – Join a highly ambitious, multidisciplinary team that combines cutting-edge simulation with hands-on engineering, turning bold ideas into real hardware on the path to commercial fusion. WHY JOIN PROXIMA FUSION * Impact: Work on the literal frontier of energy science. * Environment: Be embedded within the PSI ecosystem, collaborating with some of the world’s leading experts in superconductivity. * Flexibility: As an early hire in this department, you will have a significant say in the tools we use and the culture we build. YOUR IMPACT At Proxima Fusion, we are designing the first generation of fusion power plants to provide the world with clean, carbon-free energy. The heart of our reactor lies in its superconducting coils. These magnets must operate in extreme environments - near absolute zero temperatures and under massive mechanical stress. We are looking for a versatile engineer to join our team at the Paul Scherrer Institute (PSI). You will be responsible for developing the instrumentation and testing infrastructure that allows us to validate our magnet prototypes. Whether you are selecting a sensor for a cryogenic environment or coding the real-time dashboard for a test run, your work will directly accelerate the path to commercial fusion. WHAT YOU WILL DO Your role combines conceptual design, development of modeling and analysis tools, and hands-on experimental work. You will contribute to instrumentation, testing, and software development activities across three primary domains: 1. Instrumentation Design for Superconducting Devices You will support the implementation of our testing protocols, helping instrument coils, set up measurement systems, and execute tests to ensure reliable and precise data collection. * Concept to Execution: Develop instrumentation concepts for testing tapes, conductors and coils for QA purposes as well as in nominal and off-nominal conditions. * Sensor Selection: Identify and source sensing technologies (temperature, strain, voltage taps) capable of surviving high magnetic fields and cryogenic temperatures. * Hands-on Implementation: Lead the delicate installation of sensors onto prototypes. You’ll be responsible for the schematics, wiring standards, and procedures that ensure data integrity in extreme conditions. 2. Test Stand Software & Hardware Development Building the magnet is only half the battle; building the system that listens to it is the other. * Framework Architecture: Design a scalable, modular test framework using DAQ hardware to automate experiments. * Systems Integration: Integrate and maintain the test-stand control and measurement stack, including PSUs, DAQ systems, and synchronization hardware. This includes developing communication interfaces, coordinating device operation, and ensuring reliable interaction between hardware and software. * Data Strategy: Implement standardized data formats and live visualization tools (e.g., Grafana) so our physics team can analyze results in real-time. * Commissioning: Oversee the full lifecycle of test-stand hardware, from initial wiring and calibration to final commissioning. 3. Advanced Sensor Innovation You will push the boundaries of how we "see" inside a high-field magnet. * Next-Gen Solutions: Research and develop sensor solutions necessary to qualify coil performance. * Signal Integrity: Analyze measurement error sources such as linearity, drift, and Signal-to-Noise Ratio (SNR) to understand measurement uncertainty and improve signal quality through appropriate calibration, filtering, and acquisition strategies. * High-Field Testing: Design and execute tests in high-field environments (exceeding 20 T). Support the development of fast analog signal acquisition or FPGA-based and processing systems used to capture and analyze experimental data. WHO YOU ARE We are looking for an engineer who enjoys the bridge between the digital and physical worlds. * Background: Degree in Electrical Engineering, Mechatronics, Physics, or a related field. * The "Maker" Mindset: You are comfortable with a soldering iron in one hand and a Python script in the other. * Technical Breadth: Ideally, you have experience in at least two of the following: Sensors/Electronics, Data Acquisition, Cryogenics, or FPGA/Real-time systems. * Adaptability: You thrive in a startup environment where the scope of activities can shift. If you have a unique skill (like fiber optic splicing or high-vacuum experience), we can adjust the role to leverage it. INTERVIEW PROCESS * Recruiter Interview (30-60 min) * Technical Screening (30 min) * Technical Panel (3x60 min) *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.

Harmattan AI

ABOUT US Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces. Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected. ABOUT THE ROLE As an FPGA Radar Engineer, you will help design and implement the real-time radar signal-processing pipeline that powers our drone sensing capabilities. You will work closely with hardware and embedded software engineers and be involved throughout the development cycle, from architecture and RTL implementation to integration and field validation. This role is ideal for an engineer with a strong background in DSP, practical FPGA experience, and a genuine interest in radar systems. RESPONSIBILITIES * Develop FPGA-based radar signal-processing pipelines, encompassing key stages such as pulse compression, Range/Doppler processing, CFAR detection, and target tracking handoff. * Contribute to the RTL implementation of radar waveform generation and reception, including both FMCW and pulsed waveforms. * Perform system-level radar simulations, including Range-Doppler maps, SNR modeling, clutter analysis, and assessment of detection performance under realistic conditions. * Write and maintain testbenches and validation frameworks tailored to radar processing chains, enabling rapid debugging and iteration. * Collaborate closely with RF and hardware engineers to ensure seamless integration between FPGA designs and the radar front end - including antenna, Tx/Rx modules, ADC/DAC interfaces, timing, and synchronization. * Document the interfaces between the radar processing core, system software, and hardware layers. CANDIDATE REQUIREMENTS * Master’s degree (or equivalent) in Electrical Engineering, Signal Processing, Applied Physics, or a related field. * At least 3 years of hands-on FPGA development experience, including practical work with radar or sonar signal processing (using VHDL and/or Verilog/SystemVerilog). * Strong working knowledge of radar signal processing fundamentals, including pulse compression, matched filtering, Range-Doppler processing, CFAR, and clutter rejection. * Familiarity with FMCW and pulsed radar architectures, including waveform generation and digital back-end processing on FPGA. * Solid foundation in DSP concepts: FFT, FIR/IIR filtering, windowing, fixed-point arithmetic, and precision management. * Experience with test benches development and hardware-in-the-loop validation. * Rigorous and collaborative, with the ability to work effectively across hardware, software, and systems teams. * 100% dedication to Harmattan AI’s mission, vision, and ambitious growth plans, ready to go the extra mile to ensure operational excellence. We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.

Quantum Motion

ABOUT THE ROLE AND TEAM Quantum Motion is a fast-growing quantum computing scale-up based in London founded by internationally renowned researchers from UCL and Oxford University with over 40 years’ experience in developing qubits and quantum computing architectures. Bringing together state-of-the-art cryogenic facilities and an outstanding interdisciplinary team, we are developing quantum processors based on industrial-grade silicon chips, with the potential to radically transform computing power in areas such as materials modelling, medicine, artificial intelligence and more. Our Team Since 2021 our team has been listed every year in the “Top 100 Startups worth watching” in the EE Times in 2021 and 2022, and our technology breakthroughs have been featured in The Telegraph, BBC and the New Statesman. Our founders are internationally renowned researchers from UCL and Oxford University who have pioneered the development of qubits and quantum computing architectures. Our chairman is the co-founder of Cadence and Synopsys, the two leading companies in the area of Electronic Design Automation. We’re backed by a team of top-tier investors, and we have recently closed our Series C funding of $160 million.   We bring together the brightest quantum engineers, integrated circuit (IC) engineers, quantum computing theoreticians and software engineers to create a unique, world-leading team, working together closely to maximise our combined expertise. Our collaborative and interdisciplinary culture is an ideal fit for anyone who thrives in a cutting-edge research and development environment focused on tackling big challenges and contributing to the development of scalable quantum computers based on silicon technology.   Our team of 100+ is based across London, Oxford, San Sebastián and Sydney, with our primary hub in Islington (London). OUR TEAM You will join the Cryogenic Engineering & Lab Development team, supervised by the Staff Cryogenic Engineer. This team ensures the smooth running of our UK operations, managing state-of-the-art facilities consisting of 7+ cryogenic fridges, whilst also overseeing off-site lab deployments and installations. This position is ideal for a hands-on technical specialist who thrives on making things and solving practical engineering challenges. You will play a vital role in building a robust senior technical layer, managing specific workflows in electronics assembly, and providing essential supervision and mentorship to our growing group of apprentices. This is a rare and exciting opportunity to be an early employee at a scale-up shaping the future of quantum computing. There are vast opportunities for professional growth and to make an impact within the company.  Our team of 100+ is based across London, Oxford, San Sebastián and Sydney, with our primary hub in Islington (London). FUNCTIONS OF THE ROLE * Electronics & Mechanical Assembly: Lead the assembly of PCBs, mechanical components, and complex wiring (including high-quality soldering) for both laboratory and deployment use. * Workflow Management: Take ownership of a dedicated section of the technical workflow, maintaining a clear list of maintenance, support tasks, and assembly requirements. * Laboratory Operations: Support the day-to-day operation of our cryogenic facilities and vacuum systems, ensuring all equipment is maintained to the highest standard. * Global Installations: Assist with the preparation, paperwork, and technical execution of off-site deployments and international laboratory installations. * Supervision & Mentoring: Act as a senior technical reference point for our apprentices, ensuring they have a consistent, well-managed workflow and the guidance necessary to develop their skills. EXPERIENCE - ESSENTIALS * Technical Background: At least 3+ years of experience in a production, laboratory, or university environment with a strong emphasis on "making things." * Hands-on Assembly: Proven expertise in electronics assembly (PCB manufacturing/soldering), mechanical assembly, and basic machining. * Testing Equipment: Familiarity with bench-level electronic test equipment such as multimeters, VNAs and oscilloscopes. * Mentorship: Experience in training or supervising junior staff or apprentices, with a methodical approach to checking work and providing feedback. * Problem Solving: A strong intuition for hardware debugging and a proactive approach to installation and site work. EXPERIENCE - DESIRABLE * Experience working with cryogenic systems or high-vacuum environments. * Background in site installation or field engineering. * Formal qualifications in engineering or a related technical discipline (though equivalent practical experience is highly valued). * Experience with CAD software. Application Process * Facilities tour * 5-10 minute presentation by applicant on a relevant project and 5 minute Q&A * Group interview - Including: Snr. Lab Manager, Staff QI Engineer * Practical assessment: Soldering test BENEFITS * Be part of a creative, world-leading team  * Competitive salary and share options scheme * Contributory pension scheme * Group private medical insurance scheme * Life Assurance * Cycle-to-work Scheme  * Central London location EEO STATEMENT Quantum Motion is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, disability, gender reassignment, marital or civil partner status, pregnancy and maternity, race, colour, nationality, ethnic or national origin, religion or belief, sex, sexual orientation, or any other characteristic protected by applicable local laws (including the UK Equality Act 2010 and Spanish Employment Law).