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:

Full Stack Engineer - Payments & FinTech Web Applications

Location: Remote - Based in EST or GMT+1

Compensation: $120K - $150K

We are a high-growth technology company building a robust FinTech and payments platform. We are seeking an experienced Full Stack Engineer with strong product sense and deep technical expertise to design and build the secure, scalable, and high-performing web applications that power our platform. This role requires translating complex backend financial systems into intuitive, reliable user experiences.

You will own the development lifecycle of web applications from design through release, working across the full stack with an emphasis on the frontend user experience. You will collaborate closely with backend teams, ensuring that all features prioritize performance, security, and scalability. You will be expected to treat UI components and APIs as products, maintaining high standards for code quality and architectural clarity.

What You'll Do:

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:

Quantitative Software Engineer - DeFi Economic Optimization

Location: Remote - US, Canada and would consider candidates based in Puerto Rico

Compensation: $150K - $200K

We are a Series B quantitative research and optimization company that leads the field in DeFi economics. We manage market risk, optimize growth, and ensure economic safety for protocols facilitating most spot trading, borrowing, and lending activity across all of DeFi, securing over $42 billion in customer TVL. We are seeking highly skilled and motivated Quantitative Software Engineers to drive the safe progression of future financial systems.

You will be at the intersection of quantitative finance and software engineering, driving the design and implementation of risk management and optimization strategies for major DeFi protocols. This role involves full ownership, from building robust data pipelines and core modeling platforms to deploying logic that enhances capital efficiency and risk-adjusted yields.

Key Responsibilities:

At Quento, the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.

At Quento, we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide. Quento Technologies seeks a highly motivated and experienced IT Murex Consultant. The role will be part of the IT & FM FinApps team, under the Murex support function and will be responsible for the design, build and maintain MX Test, Back Office, Interfaces, and Reporting Murex modules.

Responsibilities:

DeFi Application Full-Stack Engineer

Location: Remote - USA, Canada and would consider candidates based in Puerto Rico

Compensation: $150K - $200K

We lead the field in quantitative research and optimization of decentralized finance (DeFi) economics. We manage market risk, optimize growth, and ensure economic safety for protocols facilitating most spot trading, borrowing, and lending activity across all of DeFi, protecting and optimizing the largest protocols and networks in the industry, which secure and manage over $42 billion in customer assets. Join us as we drive the adoption and understanding of the financial systems of the future.

Join a newly formed product pod focused on our next-generation decentralized application (dApp), which allows users to deposit and withdraw into vaults directly. This is a critical, high-impact initiative to evolve our current dashboard into a direct revenue-generating product. You will provide technical leadership in a remote-first environment, building a robust, user-facing experience at the heart of our business.

Responsibilities:

Mercier Consultancy MD is excited to offer an excellent opportunity for French Speaking Customer Service Representatives in the Banking industry. This role is perfect for individuals who are passionate about finance and customer service. As a part of our team, you will assist customers with their banking inquiries, providing them with the information and support they need to manage their financial services effectively in French.

Key Responsibilities

• Handle customer inquiries regarding banking products, services, account management, and transactions via phone, email, and chat in French.
• Provide detailed information on account features, interest rates, and service fees.
• Assist customers with online banking, wire transfers, and troubleshooting issues with their accounts.
• Resolve customer complaints and issues promptly while ensuring a high level of satisfaction.
• Document all customer interactions accurately in the CRM system following compliance guidelines.
• Collaborate with internal teams to enhance service delivery and address customer needs effectively.
• Stay updated on banking regulations, products, and services to provide accurate information to customers.

Requirements

Mercier Consultancy MD is excited to offer an opportunity for Serbian Speaking Customer Service Representatives in the Banking industry. This role is perfect for individuals who are detail-oriented and have a passion for providing outstanding customer service in a financial setting. As a customer service representative, you will assist clients in navigating banking products and services, ensuring a smooth and positive experience in Serbian.

Key Responsibilities

• Handle customer inquiries related to banking services, account management, and financial products via phone, email, and live chat in Serbian.
• Provide information about account balances, transaction details, and services, ensuring clarity and understanding.
• Assist customers with account openings, loan applications, and troubleshooting issues.
• Resolve customer complaints and concerns promptly and professionally.
• Document customer interactions accurately in the CRM system, adhering to compliance and regulatory standards.
• Collaborate with internal departments to ensure customers receive comprehensive support.
• Stay informed about new banking products, services, and industry regulations to provide accurate guidance.

Requirements

We are seeking a highly experienced IT Professional with significant finance systems delivery experience to drive and play a pivotal role in transforming financial operations through technology. Working closely with incumbent IT team, this role is pivotal in maintaining system integrity, ensuring compliance with financial regulations, and defending against evolving cyber threats. 

Requirements

Financial Systems Leadership

·       Assist in the configuration, testing and validation for finance system technology change

·       Strong understanding of finance and accounting process (IFRS/Gaap knowledge is a plus)

·       Expertise in systems architecture, integrations between HRIS and ERPs and workflow tools (ERP, FP&A, reporting systems)

·       Familiarity with Anaplan and Business Central is advantageous

·       Lead data migration activities, ensuring accuracy and completeness of financial data

·       Identify and resolve issues during implementation and post-go live phases

·       Ensure systems meet security standards.

·       Collaborate with finance and audit teams to support secure data flows and reporting.

Microsoft Business Central / D365

·       Lead finance focused BC projects from discovery to go live

·       Work with finance to map out finance process and translate them into BC technical solutions

·       Configure, test and support data migration

We are seeking a highly experienced IT Professional to support and enhance our mission-critical systems with a focus on financial (systems) and cybersecurity infrastructure. This role is pivotal in maintaining system integrity, ensuring compliance with financial regulations, and defending against evolving cyber threats. 

Systems engineering 

• Provide tier 3 support for complex infrastructure and application issues. 

• Design, implement, and maintain high-availability systems for financial platforms. 

• Perform system performance tuning, capacity planning, and disaster recovery testing. 

• Automate operational tasks using PowerShell, Python, or other scripting tools. 

Financial systems support 

• Manage and support financial applications such as ERP systems and reporting tools. 

• Ensure systems meet security standards. 

• Collaborate with finance and audit teams to support secure data flows and reporting. 

Cybersecurity operations