Principal Security Engineer - Blockchain Wallet Infrastructure

Location: Remote - Location: US or EU (remote-first, office optional). Must be in the US, not Canada or in the European Union. France or Paris or as close as possible, always preferred

Compensation: $220K - $300K

Join a stellar team of leaders and experts in blockchain technology, cryptography, and infrastructure to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Principal Security Engineer to lead security design and development across our entire platform. Reporting directly to the CISO, you will set the strategy to protect our high-stakes financial systems, fix vulnerabilities, and keep client wallets safe.

This is a strategic and highly technical role spanning the full security lifecycle. You will make security part of every layer of the stack, from architecture design to incident response. Beyond defense, you will champion secure development practices, mentor engineers, and represent the company's security posture to clients and the wider community.

Responsibilities:

Location: London, United Kingdom (Office)

Onsite | Full-time

Compensation: Competitive

We are hiring on behalf of our client, an elite, high-growth software development organization is seeking a highly experienced Staff Platform Engineer. The employer is a major technical contributor to one of the largest and fastest-growing crypto social networks globally, with platforms generating substantial revenue and transaction volume.

This is a critical, high-leverage 0-to-1 opportunity. The successful candidate will join a team of elite builders to take the production platform from its foundational stages to global scale. There is no legacy estate to inherit; this role is responsible for making the core architectural decisions, defining how the engineering team ships code safely, and building a highly reliable, multi-region environment designed to handle immense scale and financial-grade security.

Key Responsibilities

Marketing Team Lead - Content & PLG (Blockchain Trust Layer)

Location: New York City, Los Angeles, London, San Francisco (Hybrid)

Compensation: $150K - $200K

We are a venture-backed startup, founded by experts in blockchain and cybersecurity, building a global trust layer for the internet's media content. Our mission is to secure proof of origin for media, tackling the growing threat of synthetic media and disinformation. We are seeking a visionary Marketing Team Lead to establish us as a technology leader in the blockchain, digital provenance, and authenticity space, and to help us rapidly scale.

You will own the overall Go-To-Market (GTM) strategy and execution, responsible for refining our brand, positioning our platform, and building a high-performing team. This is a hands-on, high-impact role for an entrepreneurial leader who can translate a complex technical solution into a category-defining market narrative.

Key Responsibilities:

Infrastructure & DevOps Engineer - High-Performance Distributed Systems

Location: Remote - (Europe-friendly time zones preferred)

Compensation: $160K - $300K

We are reengineering blockchain infrastructure from first principles to make global digital markets as precise and dependable as physical systems. Built on a leading high-performance layer-1 network, our platform delivers deterministic execution, guaranteed inclusion, and low-latency performance. We are hiring an Infrastructure & DevOps Engineer to lead critical engineering efforts that drive the performance and scalability of our next-generation distributed systems.

You will join a highly proficient team of core engineers, focusing on Rust systems programming, infrastructure architecture (Kubernetes), and operational scripting. Your work will span the full stack, from bare metal to application interfaces, and will directly support our platform which connects the L1 network with advanced L2 extensions. You will drive high-quality, frequent code shipments, engage in deep architectural discussions, and apply a coherent system design philosophy to advance the industry.

Key Responsibilities:

Head of Growth - Institutional On-Chain Liquidity Layer

Location: Remote - US - Would consider South America or Canada + Preference for onsite/hybrid in LA

Compensation: $200K - $225K

We are a venture-backed on-chain financial infrastructure company building the liquidity layer for the tokenized economy, backed by leading investors. Our flagship protocol, deployed across multiple chains, connects tokenized real-world assets (RWAs) and high-quality stablecoins to enable 24/7, real-time, compliant capital movement for institutions. Live in production with partners including major global asset managers, we are seeking our first dedicated Head of Growth to own institutional and DeFi adoption and turn product-market fit into repeatable revenue.

Reporting directly to the Founder/CEO, you will be the core GTM leader, responsible for building the revenue engine across enterprise sales, strategic partnerships, and ecosystem development globally. This is a highly hands-on role where you will define the strategy, own the pipeline and forecast, design scalable playbooks, and close lighthouse deals across exchanges, stablecoin issuers, asset managers, and corporate treasuries.

Key Responsibilities:

Backend Software Engineer - Payments & Digital Money

Location: New York (Hybrid)

Compensation: $150K - $180K

We are a lean and mighty team of passionate builders, funded by top investors in fintech and crypto, focused on empowering the next generation of money and financial products globally. We are seeking a Backend Software Engineer to join us at the cutting edge intersection of real-world payments and digital money, where you will deliver massive impact within a small, quickly growing company.

You will be a critical part of defining our technical and product roadmap, contributing directly to our core backend infrastructure. This role involves rapid feature shipping, large-scale system scaling, and integrating with diverse third-party services and smart contracts across multiple chains. You will have the freedom to explore ideas, impact the company's vision, and grow into the role that best aligns with your personal goals.

What You'll Do:

Compliance Operations Coordinator - Cross-Border Payments

Location: Remote - Based in EST timezone

Compensation: $50K - $80K

We are building a platform that enables cross-border transactions that are drastically faster, cheaper, and simpler, moving toward a world of frictionless global commerce. We are seeking a Compliance Operations Coordinator to join us on the front lines, taking ownership of the day-to-day execution of critical bank and client compliance requests. This role is about responsiveness, precision, and extreme accountability in a high-growth, globally distributed environment.

You will serve as the essential link between our clients and banking partners, ensuring every compliance requirement is handled quickly and flawlessly to maintain trust and operational integrity. You will manage the compliance workflow end-to-end, acting with urgency to support global business scale.

What you'll be doing:

Commercial Counsel - Blockchain Infrastructure

Location:  Must be in the European Union (remote-first, office optional). France/ Paris or as close as possible, is always preferred.

Remote | Full-time

Compensation: $80K - $140K

Our client is an elite team of leaders and experts in blockchain technology, cryptography, infrastructure, and security. They are currently developing the foundational wallet infrastructure for the next financial era.

The organization is seeking a Commercial Counsel to own and drive all contract-related legal matters. Reporting directly to the CEO, this individual will work closely with Sales, Product, and Operations to support international growth. This is a hands-on role requiring a practitioner who can draft, review, and negotiate contracts and NDAs with clients, partners, and vendors. The successful candidate will build scalable templates and processes while ensuring compliance within the evolving fintech and blockchain regulatory landscape. The primary goal is to accelerate deal closures while protecting the company’s interests and balancing legal risk with business objectives.

Key Responsibilities

Staff Backend Engineer

Location: London or New York City

Onsite | Full-time

Compensation: competitive

Our client is a high-performance technology development firm responsible for building and operating the infrastructure behind the world’s largest and most active digital asset launchpads. Processing approximately $1B in daily volume, the platform operates at the bleeding edge of crypto scale, requiring systems designed for ultra-low latency, high throughput, and constant high-concurrency load.

The organization is seeking a Lead Backend Engineer to own the most complex technical challenges across the system. This is a high-stakes, high-impact role within an intense, in-person environment. The team is composed of high-agency builders who value speed, immediate impact, and rigorous engineering judgment. This position is ideal for an engineer who thrives under pressure and is motivated by the opportunity to solve ambiguous, cross-cutting problems that others cannot.

Key Responsibilities

UX Designer - Web3 Live Sports Gaming

Location: Remote - Preference for UK as thats where the majority of the team are based, 2nd preference is EU - fully remote.

Compensation: $75K - $120K

We are a rapidly growing, stealth-mode team building the ultimate digital playground for the world's most passionate football fans. Our mission is to make the match-day experience more engaging, social, and fun by blending speed, robust data, and vibrant design. We are looking for a highly creative and user-focused UX Designer to define the look, feel, and function of our web and mobile applications, translating complex live sports data into intuitive interfaces.

You will be instrumental in leading the UX strategy for our core Web platform, where the majority of live fan interaction occurs. Your focus will be on designing interfaces that are intuitive, glanceable, and performant even during the most chaotic moments of a live game. You will own the design system, drive optimization through testing, and collaborate closely with engineering to ensure pixel-perfect implementation.

Key Responsibilities: