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HOPR - Systems Engineer

Customer Relations Agent

Card Fraud Operations Manager

Chief Revenue Officer (Remote in APAC)

Full Stack Developer

HOPR is seeking a Systems Engineer to contribute to HOPRd, their decentralized mixnet protocol, focusing on network-level privacy infrastructure. The role involves optimizing low-level networking performance, enhancing packet processing, and working with p2p networking in Rust. This hands-on position requires a strong focus on provability and benchmarking to ensure protocol performance and reliability.

##### What you will doAbout HOPRHOPR is building the next generation of network-level privacy infrastructure through a decentralized mixnet protocol. We're creating technology that allows data to travel across the internet without metadata leakage—protecting not just what you say, but who you're talking to. Our protocol is fully open-source and designed for decentralized deployment.As we scale our network and bring the first product using it to market, we need systems engineers who can optimize low-level networking performance while maintaining the security guarantees that make HOPR unique.The roleYou'll be a core contributor to HOPRd (our protocol implementation) and the HOPR network stack, working at the intersection of high-performance networking, decentralized systems, and privacy technology. This is a hands-on role where you'll own significant parts of our networking infrastructure and have a direct impact on protocol performance and reliability.<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Work with a helpful and experienced team to design, build and test HOPRd and the HOPR protocol and auxiliary systems, with a strong focus on all things networking</li><li class="leading-relaxed">Enhance the packet processing pipeline, runtime system, work offloading, p2p networking, etc.</li><li class="leading-relaxed">Read and write code in Rust, most of our codebase is in Rust. All the code is open-source.</li><li class="leading-relaxed">Help to improve the performance on every layer, be a single function or entire sub-systems, always with a focus on provability and benchmarking.</li></ul>##### Who you are<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Are familiar with networking concepts and protocols and comfortable in Rust</li><li class="leading-relaxed">Have dealt with networks, network integration and have previously worked with plain UDP</li><li class="leading-relaxed">Love to make networks perform at their line rate, knowing that it requires rigorous analysis, potentially novel architecture, and careful implementation. While this might not be achievable for HOPR, it's an important mindset to have.</li><li class="leading-relaxed">Appreciate the hard-won thrill of debugging a knotty problem to root cause</li><li class="leading-relaxed">Believe in fully documenting your ideas for your colleagues and future self</li><li class="leading-relaxed">Enjoy reading the documentation produced by your peers</li><li class="leading-relaxed">Make the tools you wish you had, rather than waiting for them to appear</li></ul>Before applying for this role, you should:<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Browse through our public monorepo [1] and see how we work</li><li class="leading-relaxed">Check out the HOPR basics articles on Medium [2] and read through the latest documentation on how to actually run a HOPR node [3]</li><li class="leading-relaxed">Enjoy the technical detail of our RFCs [4]</li></ul>[1] https://github.com/hoprnet/hoprnet/[2] https://medium.com/hoprnet/subpage/basics[3] https://docs.hoprnet.org/node/releases[4] https://rfc.hoprnet.org/##### What we can offer you<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Remote first: Our team is based in Europe across multiple cities and countries. While we do have a small base in Zurich, Switzerland, remote work is in our DNA.</li><li class="leading-relaxed">Flexible working hours: Families and lives outside of HOPR are important to us. Our schedules are flexible and to support each team member’s life.</li><li class="leading-relaxed">Team retreats: We try to meet in person as often as we can/want. Full team retreats happen twice a year, small group work retreats are always possible.</li><li class="leading-relaxed">Unlimited vacation policy: No limit on the number of vacation days taken per year.</li><li class="leading-relaxed">Hardware allowance: You can get whatever hardware you need to be the most productive.</li><li class="leading-relaxed">Education and conference allowance: We support the continuous education of our team members.</li></ul>

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<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Description</h3>Thinking about a future in games, entertainment, or media?Rebellion’s work experience programme at our Oxford studio is designed for KS4/KS5 students who are curious, creative, and keen to learn. This is a chance to step inside a real games company, shadow industry professionals, learn how different departments operate, and see how ideas turn into finished products.Whether you’re curious about programming, art, design, marketing, operations, or support roles, there’ll be a place for you to explore your interests. You’ll build confidence, pick up useful skills, and get advice on possible education and career paths in games and related creative industriesRebellion is committed to equal opportunities and diversity, and we welcome students from every background and identity. If you’re ready to take your first step into the world of games and entertainment, we’d love to hear from you!<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Requirements</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">A genuine passion for the gaming, film, or publishing industries.</li><li class="leading-relaxed">Enthusiasm for learning, with a proactive and hands-on approach to tasks.</li><li class="leading-relaxed">Dependable, reliable, and committed to demonstrating a strong work ethic.</li><li class="leading-relaxed">Residing in the UK and within commuting distance of Oxford.</li><li class="leading-relaxed">Currently studying at Key Stage 4 or 5 (GCSE or A-Level equivalent).</li><li class="leading-relaxed">Available to attend work experience during the weeks June 29th – July 3rd or July 13th – July 17th 2026.</li><li class="leading-relaxed">Applications must be submitted by February 15th, 2026.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Benefits</h3>Inside RebellionWhichever team you join at Rebellion we are proud of our open, friendly, and creative atmosphere. We love what we do, and we have fun doing it! As a big indie developer, we have complete creative freedom over our titles which allows us to work on a massive variety of projects across all the major platforms.Find out more about us <a href="https://careers.rebellion.com/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">here</a>Life at Our Oxford HQOur riverside headquarters in Oxford places you a short walk away from the city centre. Renowned for its rich historical backdrop and esteemed educational institutions, Oxford offers a unique blend of tradition and modernity, with its beautiful architecture and green spaces.Oxford also boasts excellent transport links, making it easy to navigate both the city and the wider country. The city’s train station, just a short walk from our studio, offers frequent services to London, as well as direct routes to major cities like Birmingham, Manchester, and Reading and we also offer free parking at the studio.Our open-plan office promotes teamwork and innovation, with regular interaction with senior management and other departments, alongside access to free hot drinks, a handy tuck shop onsite and a range of local pubs, cafes and dining options nearby helping make every workday enjoyable!#LI-Onsite

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HOPR - Systems Engineer

Customer Relations Agent

Card Fraud Operations Manager

Chief Revenue Officer (Remote in APAC)

Full Stack Developer

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