Overview 

We’re looking for a Mobile Engineer passionate about creating high-quality, user-focused applications that connect people through performance, movement, and data especially within sports and wearable technology ecosystems. 

Job Overview 

You will design, build, and maintain React Native applications for both Android and iOS. You’ll develop tools and experiences that connect users through sports and activity platforms, integrating with wearables and real-time data systems to deliver seamless tracking, analytics, and engagement. 

You’ll collaborate closely with backend developers, product managers, and designers to turn complex data and operational flows into intuitive, reliable mobile experiences. 

Key Responsibilities 

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

Senior Rust Engineer - On-Chain Security Infrastructure

Location: Remote - Europe

Compensation: $165K - $200K

We are building a Credible Layer—a step-level improvement for on-chain security designed to safeguard the crypto industry and restore credibility after billions were lost to hacks. We are creating an on-chain protocol and off-chain infrastructure that enables protocols to enforce security rules for every transaction. Backed by world-class investors, we are seeking a Senior Rust Engineer to work on bleeding-edge infrastructure at the heart of our mission.

You will play a crucial role in shipping cutting-edge features that extend the EVM (Ethereum Virtual Machine) to enable security rules to be checked after every state transition. This is a high-impact, deeply technical role requiring expertise in performance optimization and low-level systems programming within a collaborative, fast-iteration environment.

Key Responsibilities:

Senior Infrastructure Engineer - Blockchain Wallet Backbone

Location: Remote - United States

Compensation: $180K - $300K

Join a stellar team of leaders and experts in blockchain technology, cryptography, and security. Our client is seeking a Senior Infrastructure Engineer to design, operate, and scale systems at the intersection of blockchain, cybersecurity, and distributed infrastructure, preparing them to meet the demands of a trillion-dollar industry.

This role goes beyond maintenance—you will be an architect, automator, and security expert. You will embed best-in-class DevOps and SRE practices into their workflows, ensuring their services are highly reliable, secure, and cost-efficient. You will collaborate across engineering, product, and security to translate complex requirements into scalable infrastructure.

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

Senior Blockchain Engineer - Encrypted Infrastructure

Location: New York (Office)

Compensation: $150K - $200K

We are a small, fast-moving software company building an encrypted blockchain that combines deep expertise in cryptography, compilers, and distributed systems. Backed by top-tier investors including a16z and Polychain, we are financially secure with several years of runway. We are seeking a Senior Engineer to join our elite team in New York City and work on cutting-edge, challenging engineering problems.

You will join a focused team of industry veterans and standout talent, taking on significant decision-making responsibilities as you design and implement core components of our encrypted platform. This role requires the commitment to bring hard, complex tasks to completion independently, contributing to infrastructure that is fundamentally redefining secure data handling on-chain.

Key Responsibilities:

Product Lead - Institutional DeFi Lending

Location: Remote - Paris or remote (GMT -5 to +2)

Compensation: $100K - $150K

We are a leading Decentralized Finance (DeFi) lending protocol experiencing explosive growth, with over $9 billion in assets supplied on the platform. Backed by major VCs like Ribbit Capital, a16z crypto, and Coinbase Ventures, our mission is to revolutionize lending with an open, efficient, and resilient platform. We are seeking a Product Lead to drive our Prime Products vertical as we establish ourselves as a cornerstone of the new internet-native financial system.

As Product Lead, you will own the strategy and execution for our prime product vertical, focused on advanced users, institutions, and Curators. This role requires developing a deep understanding of the protocol, the competitive lending landscape (both CeFi and DeFi), and the specific risk management needs of large capital allocators. You will work across the organization—with engineering, design, data, and protocol teams—to ship industry-shaping products.

Key Responsibilities:

Mercier Consultancy MD is searching for a Polish Speaking Digital Trust and Safety Specialist to join our dedicated team. In this critical role, you will be responsible for fostering a safe online environment for our users by monitoring digital content, managing safety inquiries, and enforcing community standards.

Key Responsibilities

• Monitor user-generated content and interactions to identify potential violations of our safety policies and community guidelines.
• Conduct thorough investigations into reported incidents, evaluating evidence to recommend appropriate actions.
• Collaborate with cross-functional teams to enhance and develop safety policies that support a trustworthy digital community.
• Create and present detailed reports on safety incidents, trends, and recommendations to inform management decisions.
• Stay updated on the latest developments in digital safety to continuously improve our protocols.
• Engage with users to promote safety awareness and provide guidance on navigating online risks.

Requirements

Mercier Consultancy MD is thrilled to announce a fantastic opportunity for a Dutch Speaking Agent for Luminus, with the flexibility to work remotely from the beautiful landscapes of Greece. As a vital part of the customer support team, you will engage with Dutch-speaking clients to address their inquiries and provide exceptional service while enjoying a work-life balance in a stunning location.

Responsibilities

• Handle customer inquiries and requests in Dutch via phone, email, and chat, ensuring a friendly and professional interaction.
• Assist customers with their accounts, guiding them through troubleshooting processes, and providing solutions to their concerns.
• Maintain a thorough understanding of Luminus products and services to provide accurate information and assistance.
• Document customer interactions, feedback, and any issues in the CRM tool for improved service delivery.
• Work collaboratively with team members to enhance customer journeys and resolve escalated queries efficiently.
• Stay up-to-date with industry trends and customer needs to continuously improve service offerings.

Requirements

Mercier Consultancy MD is pleased to present an exciting opportunity for a Dutch/Flemish Speaking Agent for Proximus, allowing you to work remotely from the beautiful country of Greece. In this role, you will play a key part in delivering outstanding customer service to Dutch-speaking clients, helping them navigate Proximus' product offerings and support.

Responsibilities

• Provide exceptional customer service to Dutch/Flemish-speaking clients via phone, email, and chat, addressing inquiries and providing appropriate solutions.
• Assist customers with account management, troubleshooting, and any technical issues they may face with Proximus services.
• Keep up to date with Proximus' latest products, services, and promotions to provide accurate information.
• Document customer interactions and maintain accurate records in the CRM system for quality assurance.
• Collaborate with colleagues and other departments to ensure a seamless customer experience and resolve escalated issues efficiently.
• Contribute to ongoing improvements in customer service strategies and processes.

Requirements