You will be Keycafe's go-to storyteller. Our product solves a real, everyday problem for dealerships, hotels, property managers, fleets and facilities teams, and our customers have great results to share. Your job is to turn that into a steady stream of clear, credible communications that build our brand, support sales and keep our customers informed.

This is a hands-on role for someone who loves to write, can juggle many projects and is comfortable working closely with sales, customer success, product and leadership. We are a small organization that operates globally and you will be asked to think creatively and take on other projects as needed such as running a podcast. 

Key responsibilities

Brand voice and messaging

• Own and maintain Keycafe's messaging framework, tone of voice and style guide
• Translate technical product capabilities (SmartBox, cloud platform, API, integrations) into clear benefits for each audience and industry
• Review customer-facing copy across teams for consistency and quality

Content and storytelling

Location: Remote - US Remote (Preference for NYC based candidates)

Remote | Full-time

Compensation: $200K - $250K

Our client operates shared financial infrastructure designed to enable businesses and institutional partners to launch and manage branded stablecoins and advanced digital asset issuance stacks. The platform provides fully interoperable, liquid on-chain solutions that grant businesses programmable control over payment ecosystems while meeting the stringent operational demands of regulated financial institutions.

To support rapid growth and expanding institutional partnerships, our client is seeking a sharp, execution-focused Head of Security & Risk. This is a foundational, individual contributor (IC) role at a critical inflection point for the organization. In this position, the Head of Security & Risk will build and own the information security and enterprise risk management functions from the ground up.

Location: Remote - US or EU

Remote | Full-time

Compensation: $160K - $240K

Our client operates a core banking platform designed specifically for digital assets, enabling fintechs and systemically important financial institutions to build, operate, and scale onchain infrastructure. The platform secures over €100B in assets and powers critical operations—including key management, transaction processing, treasury, and compliance—for over 400 global institutions.

Our client is seeking a Principal Security Engineer to lead product security across the entire ecosystem. In this role, security is built directly into the system's architecture rather than applied as a secondary control. The ideal candidate will take ownership of hardening key management, signing workflows, authentication systems, policy enforcement, and multi-chain integrations.

Beyond core product security and vulnerability management, this position plays a pivotal role in shaping the long-term architectural vision of a platform trusted by tier-one financial institutions. As an organization committed to technical excellence, our client also encourages contribution to the broader security community through research, publications, and industry events.

Key Responsibilities

About Signal Ocean × AXSMarine

Signal Ocean is the technology arm of the Signal Group, providing market-leading advanced machine learning and AI-driven intelligence to shipping and commodities professionals worldwide. Our platform delivers tailored, exclusive insights through web, mobile, and API interfaces, enabling clients to make faster, better-informed commercial decisions.

Signal Ocean has recently acquired AXSMarine, a business with over 25 years of experience in the freight and commodities space - and is actively integrating the two companies. The combined business now offers the most comprehensive suite of freight market intelligence available, and we are actively building the team to realise the full potential of the integration.

About the Role

We are looking for an experienced Sales Account Manager to join our Northern Europe team, based in London. This is a relationship-first role: your primary mandate is to own, protect, and grow a defined portfolio of established Signal Ocean and AXSMarine accounts, with a focus on the Northern Europe region.

You will be joining a high-performing, London-based team at an exciting inflection point - the integration of two leading maritime data businesses creates a unique opportunity to deepen client relationships across a combined product suite that no competitor can match.

Location: Remote - Europe

Remote | Full-time

Compensation: $110K - $125K

We are hiring on behalf of our client who is a premier infrastructure provider within the decentralized web (Web3) ecosystem, serving as the critical connectivity layer for tens of thousands of applications and millions of users globally. Having established a dominant market position, the organization is now expanding its horizons by launching a sophisticated payments solution.

This new initiative enables merchants and payment providers to utilize blockchain rails for stablecoin checkouts, payouts, and deposits, already reaching millions of terminals worldwide through strategic global partnerships.

The data systems supporting this infrastructure are foundational to the company's success. As the organization transitions from MVP pipelines to a scalable production architecture, there is a need for a Senior Data Engineer to join the team. This individual will help design and operate the data foundation behind a global payments network, ensuring that systems tracking wallet connections, transaction health, and financial reconciliations are as reliable as the payment flows themselves.

Senior Backend Engineer

Location: US or Europe (Must have solid overlap with EST)

Remote | Full-time

Compensation: $150K - $200K

Our client is an industry-leading DeFi organization building the next generation of trading infrastructure. Operating as the largest builder-code product on a major decentralized exchange protocol, the company has processed over $65B in cumulative trading volume and generated eight-figure revenue over the past year. With a user base exceeding 400,000 registered traders, the platform is at the forefront of democratizing access to global financial markets across crypto, equities, and commodities.

The organization operates as a lean, highly technical team of individual contributors who prioritize autonomy, ownership, and rapid execution. This environment is designed for a Senior Backend Engineer who thrives in 0-to-1 environments and is capable of building ambitious systems from the ground up. This role is central to scaling trading interfaces that manage billions of dollars in daily volume while maintaining high-speed, intuitive user experiences.

Key Responsibilities

Senior Backend Engineer

Location: EMEA / EU Hours - Authorised to work in EMEA

Remote | Full-time

Compensation: €90K - €130K

Our client is a high-growth fintech leader specializing in simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. By offering a unified API, the platform provides seamless access to on-chain liquidity across all major blockchains for optimized same-chain and cross-chain swaps. The organization is on a mission to enable a fairer, decentralized world while prioritizing exceptional user experiences to make complex technologies accessible to a global audience.

The organization is seeking multiple Senior Backend Engineers to lead the design, development, and maintenance of robust, scalable, and secure backend systems. Reporting to the Backend Lead, the successful candidates will collaborate with cross-functional teams— including frontend developers, product managers, and designers—to deliver high-quality software solutions. The technical environment utilizes a modern stack including Node.js (TypeScript), MongoDB, Redis, and ethers.js, supported by a GitOps CD chain involving Kubernetes and AWS.

Key Responsibilities

Staff Mobile Engineer

Remote | Full-Time | Engineering

Compensation: $180K - $250K

We are hiring on behalf of our client, the largest ecosystem builder on a leading decentralized perpetual exchange, currently building the next generation of DeFi trading. Their mission is to democratize access to global financial markets—including crypto, equities, and commodities—by leveraging decentralized technology. To date, their platform has processed $65B+ in cumulative trading volume, generated eight figures in revenue, and supports over 400,000 registered traders.

They are a small, elite team of individual contributors who value autonomy, ownership, and rapid execution. They are looking for a Staff Mobile Engineer who views React Native as a craft. You will sit at the intersection of engineering, design, and product, turning raw speed into a premium mobile experience that feels intentional and indistinguishable from a native app.

Key Responsibilities:

Backend Engineer (Hyperliquid Focus)

Location: Remote (EMEA Region Only) Type: Full-Time

Compensation: €90K - €130K

We are hiring on behalf of our client who are on a mission to simplify multi-chain DeFi for financial institutions, fintechs, and service providers. Their team is building a unified infrastructure layer that provides seamless access to on-chain liquidity across all major blockchains, enabling high-performance same-chain and cross-chain swaps. They are a passionate, remote-first team dedicated to making complex decentralized technologies accessible and building a fairer, more transparent world.

They are looking for a Backend Developer with a deep interest in the Hyperliquid ecosystem to join their engineering team. This is a pure backend role—no frontend or design work is required. You will focus on building the infrastructure that allows them to distribute programmatic trading features (such as TWAP and perps) to the broader DeFi ecosystem.

Location Note: This position is strictly open to candidates currently located in the EMEA region.

What you’ll do:

Data Scientist - Consumer Product Optimization

Location: New York City, London (Office)

Compensation: $250K - $300K

We are seeking an experienced, versatile Data Scientist to join our team, which is focused on a fast-paced consumer-facing product within the fintech or equivalent industry. This is a high-autonomy role where you will have the freedom to identify opportunities, design and implement solutions, and measure their impact across our entire product suite.

We value generalists who possess breadth across the data science field and thrive on end-to-end ownership. You will collaborate with cross-functional teams while driving projects independently from conception to completion.

The Data Scientist will be responsible for leveraging data to drive product decisions, optimize user experiences, and uncover strategic opportunities for growth.