Pioneering the future of interactive entertainment with cutting-edge technology.

OpenSea

Staff Backend Engineer

Head of Security

Creative Director

OpenSea is building infrastructure that supports millions of users and sets new standards for how people discover and exchange digital value. We are looking for an ambitious, detail-oriented Staff Backend Engineer to spearhead core features of the OpenSea 2.0 backend, building and scaling feature-rich, well-tested, and polished applications with modern technologies. This role involves forming and executing a technical vision for the next generation of OpenSea’s architecture, leveraging highly scalable and event-driven patterns.

The gateway to web3’s next chapter—where NFTs, fungible tokens, and emerging digital assets converge to create open, user-owned economies. As a foundational player in the crypto space, we’re building infrastructure that supports millions of users and sets new standards for how people discover and exchange digital value.Our team is small but mighty: hands-on, fast-moving, and deeply committed to shipping meaningful work. We're remote-first by design, AI-empowered by default, and guided by values that prioritize ownership, trust, and progress. You’ll be challenged to grow fast while being supported by a talent-dense team shaping the future of crypto.We're looking for an ambitious, detail-oriented engineer with an enthusiasm for building and scaling feature-rich, well-tested, and polished applications with modern technologies. This individual will spearhead core features of the 2.0 backend.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Responsibilities</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Form, communicate, and execute on a technical vision for the next generation of architecture that leverages highly scalable and event-driven patterns</li><li class="leading-relaxed">Write reliable, low latency marketplace infrastructure software that will eventually process billions of dollars a day worth of transaction volume, including highly performant blockchain indexing systems, order management systems at scale, and REST & Websocket API endpoints</li><li class="leading-relaxed">Raise the bar for internal understanding of best practices in building highly performant & event-driven systems with “live” characteristics</li><li class="leading-relaxed">Mentor and train other team members and act as an internal thought leader and agitator for architectural rigor and cleanliness</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Requirements</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">At least 6 years of experience as a software engineer</li><li class="leading-relaxed">Strong fluency in event-driven system design patterns, leveraging technologies such as Kafka, Flink, and Debezium, as well as distributed systems more generally</li><li class="leading-relaxed">Strong fluency in JVM languages like Kotlin or Java</li><li class="leading-relaxed">Strong fluency and opinionated in database choice and schema design for highly performant and scalable applications</li><li class="leading-relaxed">Intrinsic interest in leveraging new tools (e.g. AI) to increase work efficiency and quality</li><li class="leading-relaxed">Passion for (blockchain) technology, NFTs, and the potential of digital ownership is a huge plus</li></ul>The base salary for this full-time position in the United States, spanning multiple internal levels depending on qualifications, ranges between $190,000 to $345,000 plus benefits & equity. Compensation for internationally based candidates will vary to reflect local market conditions.If you don't think you meet all of the criteria above but still are interested in the job, please apply. Nobody checks every box, and we're looking for someone who is excited to join the team.#LI-Remote<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Benefits & Perks</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">🏥 Health Benefits: We cover 100% Dental/Vision/Medical for employees and 90% for dependents</li><li class="leading-relaxed">🌴 Flexible Time Off Policy: Our flexible time off policy is aimed at letting our employees take as much time off as they'd like to refresh so long as it doesn't interfere with their ability to meet their goals and contribute effectively to company velocity</li><li class="leading-relaxed">👶 Parental Leave: 16 Weeks of Paid Parental Bonding & up to 8 additional weeks for the birthing parent</li><li class="leading-relaxed">💛 Mental Health: We offer access to Spring Health, covering 8 therapy & 8 coaching sessions per year</li><li class="leading-relaxed">📅 11 Company Holidays</li><li class="leading-relaxed">🏦 Fidelity 401K Plan</li><li class="leading-relaxed">📱 Internet/Mobile Reimbursement Plan</li><li class="leading-relaxed">🧘 Reimbursement or Monthly Snack Delivery</li><li class="leading-relaxed">✈ Company & Team retreats to get together for fun and collaboration</li><li class="leading-relaxed">☕ Team Member Co-Working and Gathering Expense</li><li class="leading-relaxed">🖥 MacBook Pro & WFH Stipend to make sure you are set up for success</li><li class="leading-relaxed">🌯 Weekly $50 Uber Eats credit</li></ul>By clicking submit an application below, you consent to our use and processing of your data as described in our <a href="https://drive.google.com/file/d/15nIEoZyf5MDRN8ViRkBib-3t81-WbqFF/preview" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Candidate Privacy Notice</a>.Please be aware that participates in E-Verify to confirm employment eligibility.<a href="https://jobs.ashbyhq.com/OpenSea/bd865eca-95dd-4efe-9304-d64532d20c69/application" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Apply for this Job</a>This site is protected by reCAPTCHA and the Google <a href="https://policies.google.com/privacy" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Privacy Policy</a> and <a href="https://policies.google.com/terms" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Terms of Service</a> apply.

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tonies studios

Head of COO Office (all genders)

Iron Mountain

Data Analyst

National Business Development Manager - Global Industries

AVR Operator

Archives Center Specialist

Senior Associate

Shift Manager

flying wild hog

Foliage 3D Artist

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tonies is a global leader in interactive audio platforms for children, known for its intuitive Toniebox system. With over 10 million Tonieboxes sold, the company focuses on child-safe, screen-free learning and play. As Head of COO Office, you will be a strategic partner to the COO, driving operational excellence across global functions like quality, supply chain, production, and procurement. This role ensures strategic alignment, cross-functional coordination, and digital transformation within operations, supporting the COO in critical priorities and maintaining a precise, agile, and compliant operational backbone.

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Creative Director (all genders)

Head of CXO Office (all genders)

Senior Financial Analyst – Cash & Balance Sheet (all genders)

##### About tonies:tonies is the globally leading interactive audio platform for children with more than 10 million Tonieboxes and 125 million Tonies sold. The intuitive and award-winning audio system has changed the way young children play and learn independently with its child-safe, wireless, and screen-free approach. Tonieboxes have been activated in over 100 countries, the content portfolio includes around 1,400 Tonies in several languages. Since its inception, tonies has achieved significant milestones, including listing on the Frankfurt Stock Exchange in November 2021 as well as a globally present team of over 550 dedicated professionals operating from various countries.Joining our tonies team means being part of an inspiring mission to create innovative and meaningful experiences for children around the world. Together, we’re shaping the future of play, learning, and imagination.##### You as part of tonies:As Head of COO Office (all genders), you will act as a strategic partner, advisor, and execution driver across our global operations function. 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Because only where you truly feel comfortable can you give your best.</li><li class="leading-relaxed">Mobility: Choose the option that suits you best - a Deutschlandticket (public transport ticket) for unlimited mobility, a monthly contribution for an office parking space, a leasing bicycle, or a remote work subsidy.</li><li class="leading-relaxed">Enhanced Security: Benefit from subsidies for company pension plans, occupational pension schemes, and occupational disability insurance.</li><li class="leading-relaxed">Rest & Time Off: Enjoy 30 days of paid annual leave as well as three additional days off such as Rosenmontag, Christmas Eve, and New Year's Eve. After one year of employment, you can also use up to 10 "toniecation days" (unpaid leave days).</li><li class="leading-relaxed">Continuous Learning: Benefit from our internal and external training opportunities as well as an individual learning budget to continuously expand your knowledge.</li><li class="leading-relaxed">Language Learning & Relaxation: Improve your communication skills with the language learning app Babbel and find relaxation through our access to the meditation app Calm.</li><li class="leading-relaxed">Discounts: Benefit from attractive discounts on our entire range of tonies products.</li></ul>##### Good to know:As part of our principles, we are committed to supporting inclusion and diversity at tonies. We actively celebrate our colleagues’ different abilities, ethnicities, faith and gender. Everyone is welcome and supported in their development at all stages in their journey with us.

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Staff Backend Engineer

Head of Security

Creative Director

Job Details