Senior Blockchain Engineer - Wallet Infrastructure & Integrations

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: $160K - $240K

Join a stellar team of leaders and experts in blockchain technology, cryptography, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Senior Blockchain Engineer to lead the design, development, and scaling of the components that connect our platform to every major blockchain network. This role is both hands-on and strategic, focusing on speed, resilience, and security under high-stakes financial workloads.

You will own the entire lifecycle of blockchain integrations, from low-level data indexing to high-level API design and smart contract development. You will improve our indexing and monitoring infrastructure, ensure secure integrations across diverse networks, and build tools that make our wallet platform faster and easier for partners to adopt.

Key Responsibilities:

Director of Sales - Enterprise Blockchain Security, Europe

Location: London (Hybrid)

Compensation: $130K - $150K

We are a fast-growing blockchain security company seeking a dynamic and results-driven Director of Sales to spearhead our expansion across Europe. This is a key leadership role responsible for driving revenue growth, building strategic relationships, and managing complex, high-value sales cycles from prospecting through close. You will act as a core member of our team, representing our solutions to leading institutional clients in the digital asset ecosystem.

As a proven "hunter," you will own the entire sales engine for the European territory. This is a field-based role that requires high autonomy to generate and qualify a robust pipeline through proactive outreach. You will be responsible for identifying and engaging institutional clients, delivering tailored product demonstrations, and collaborating cross-functionally to ensure client needs are translated into customized blockchain security solutions.

Key Responsibilities:

Mercier Consultancy is delighted to announce an opening for a Danish Speaking Content Reviewer to join our team in Sofia, Bulgaria, with a paid relocation package! This is an excellent opportunity to work in a dynamic environment while enjoying the rich culture and history of Sofia. In this role, you will be vital in ensuring a safe and engaging online community for Danish-speaking users.

Your Key Responsibilities:

• Reviewing and moderating user-generated content in Danish to ensure compliance with community standards.
• Assessing content based on predefined guidelines and providing constructive feedback.
• Identifying inappropriate content and reporting any issues to the relevant teams.
• Collaborating with other team members to enhance moderation processes.
• Analyzing trends in user interaction to help improve content quality.
• Staying informed about changes in policy and community standards.

Requirements

About the Job

Step into the world of clinical research with Excelya as a Clinical Trial Assistant. Here at Excelya, our values of Audacity, Care, and Energy not only shape our company culture but also your experience as an employee. This role offers you a unique opportunity to be involved in the critical processes of clinical trials while collaborating with a team that is dedicated to making a difference.

Main Responsibilities

Smart Contract Developer - Institutional DeFi Protocol

Location: Remote - US only (preference for onsite/hybrid in LA)

Compensation: $160K - $180K

We are an on-chain financial infrastructure company backed by leading VCs, committed to upgrading financial markets through 24/7 instant settlement. Our first product is an institutional-grade smart contract protocol that facilitates interoperability and liquidity across tokenized financial assets and stablecoins. We are seeking a Smart Contract Developer to join our core engineering team and build the foundational infrastructure that bridges traditional finance (TradFi) and decentralized finance (DeFi).

This is a high-impact, hands-on role where you will design, develop, and deploy highly secure, robust smart contracts for our core protocol. You will architect on-chain logic, optimize gas efficiency, and ensure best-in-class security practices to enable institutional-grade DeFi operations. You will work within a small, senior team, collaborating closely with security auditors, product, and business stakeholders.

Key Responsibilities:

Senior Full Stack Engineer - (Platform)

Location:Remote - Preference for NYC - Or Remote USA OR EUROPE to work a 5 hour overlap with EST hours

Remote | Full-time

Compensation: $144K - $164K

Our client is a pioneer in automated, on-chain economic security, providing a sophisticated system that enables crypto protocols to optimize risk management and capital efficiency. By analyzing protocol mechanics and scenario implications through world-class custom EVM simulations, the platform provides actionable insights trusted by leading decentralized finance (DeFi) protocols to manage and secure billions of dollars in assets.

The organization is seeking a proactive and results-driven Senior Full Stack Engineer to join the team. Reporting directly to the Platform Team Lead, the successful candidate will play a critical role in building data-driven dashboards and tools to support complex risk analysis. This role involves close collaboration with research and protocol teams to deliver high-quality frontend and backend components that power essential security insights.

Key Responsibilities

Creative Marketer - Next-Generation Layer-1 Blockchain

Location: Paris (Hybrid)

Compensation: $80K - $105K

We are a well-funded startup building a next-generation base layer blockchain designed to unlock customizability, scalability, and privacy by combining native proof verification directly into the protocol. Fueled by a $3.4M investment from top-tier venture capitalists, we are looking for a resourceful, creative marketer with a hacker mindset to amplify our brand voice and drive aggressive growth in the blockchain space.

This role is for an action-oriented, highly autonomous builder who thrives on experimentation and driving measurable outcomes. You will be responsible for end-to-end marketing execution, managing high-impact campaigns, and creating engaging content across all channels to grow our reach and mindshare.

Key Responsibilities:

🚀 Are you passionate about customer service and fluent in Dutch? Join our amazing team at Mercier Consultancy MD as a Dutch Speaking Remote Customer Service Representative! This is an incredible opportunity to work remotely from anywhere in the world.

Your journey begins with a comprehensive 3-month training and trial program in Greece, where you will gain invaluable hands-on experience while collaborating with our supportive team. Once you complete your training, you'll transition to remote work, providing top-notch service to clients across the globe.

What You’ll Do:

• Deliver exceptional customer support to Dutch-speaking clients through various channels such as phone, email, and chat.
• Effectively resolve inquiries, ensuring a positive experience with every interaction.
• Master our client systems and processes during the training program to enhance your efficiency.
• Work flexibly from anywhere while staying connected with an enthusiastic global team.
• Seize the opportunity to grow your career within a high-performing environment.

Requirements

Location: US or Europe

Remote | Full time

Compensation:  $200K - $300K

Our client is a premier non-custodial trading and data platform at the forefront of cryptocurrency technology. The organization provides a unified base of operations where users retain custody of their funds while accessing live data, instant execution, and powerful charting tools across all emerging markets. By maintaining a lean, high-performance team of exceptional talent, the client ensures rapid release cycles that place new features in the hands of tens of thousands of active users immediately upon completion.

The organization is seeking a Principal Frontend Engineer with extensive experience building highly performant, real-time, and interactive web applications tailored for trading. This individual will serve as a subject matter expert, leveraging a background as a founding or first engineer to guide the platform through its next phase of growth and product expansion.

Key Responsibilities

Senior Backend Engineer - Stablecoin Infrastructure

Location: Remote - Based in EST timezone

Compensation: $175K - $225K

We are a technology company building a full-service platform that transforms how money moves. Our mission is to make digital dollars the core of a new, global financial fabric—faster, more efficient, and universally accessible. We are creating foundational infrastructure that makes issuing, managing, and integrating stable, dollar-based value on-chain seamless for developers, fintechs, and institutions. We are backed by world-class investors and are growing a team to reimagine how value moves online.

We are seeking a Senior Backend Engineer to accelerate the delivery of both critical internal tooling and high-impact customer-facing products. You will join a small, high-performance team that applies the discipline of high-performance finance to a fast-moving, crypto-native startup environment.

In this role, you will: