Senior Core Systems Engineer - Secure 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: $180K - $260K

Join a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Senior Core Systems Engineer to design, build, and scale the low-level systems at the heart of our platform, where performance, security, and correctness are non-negotiable. This is a high-impact role focused on turning advanced cryptography into fast, resilient, and trusted production infrastructure.

As a Core Systems Engineer, you will work deep in the stack, designing and scaling reliable distributed services and integrating them with cloud, hardware, and blockchain environments. You will collaborate across product, research, and security to implement advanced cryptographic and security protocols using low-level systems languages.

Responsibilities:

Researcher - Automated On-Chain Economic Security

Location: Remote - Preference for NYC but will accept USA + Europe remote working EST hours

Compensation: $120K - $150K

We are the first automated, on-chain economic security system, trusted by leading protocols to manage and secure billions of dollars in assets across the DeFi ecosystem. Our platform helps crypto protocols optimize risk management and capital efficiency by analyzing protocol mechanics and scenario implications using custom EVM simulations. We are seeking a proactive and results-driven Researcher to join our team, reporting directly to the Head of Economic Research & Strategy.

You will play a critical role in conducting in-depth protocol research, modeling risk parameters, and shaping strategic research initiatives across high-impact DeFi projects. This role requires a strong blend of quantitative analysis, risk modeling expertise, and clear communication to both clients and the broader community.

Responsibilities:

DeFi Market Analyst - Risk & Innovation

Location: Remote - Preference for NYC - Will accept Remote Europe & USA to work EST

Compensation: $120K - $150K

We are a technology company that builds cutting-edge risk management systems, oracles, and AI models to make markets safer and more accessible. Our platform is trusted by leading protocols in decentralized finance (DeFi), securing and managing billions of dollars in assets. We are seeking a talented DeFi Market Analyst to join our team, reporting directly to the Innovation Lead, to help shape the future of decentralized finance.

As a DeFi Market Analyst, you will be crucial in expanding our trading capabilities, optimizing incentive programs, and providing actionable quantitative insights. This role requires a strong blend of market research, quantitative analysis, and operational efficiency to improve execution quality across our platform.

Responsibilities:

Data Scientist - DeFi Quantitative Research

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, protecting and optimizing the largest protocols and networks in the industry. We build institutional-grade vaults for decentralized finance and currently manage risk and incentives covering over $42 billion in customer TVL. We are seeking experienced Data Scientists to help new and established protocols better understand and optimize the systems they've built.

In this role, you will work directly with the premier and most innovative DeFi protocols, developing expert-level knowledge of the mechanisms that underpin the industry. This requires a strong ability to perform in-depth quantitative research, manage client engagements end-to-end, and translate complex data insights into clear, actionable value.

Responsibilities:

Are you interested in working with a leading education technology player, the global leader in the assessment and certification of the professional skills industry with a presence in more than 200 countries worldwide? If so, this is your chance to apply now! 📥

PeopleCert is looking for English Speaking Examiners to join our team in Nicosia, Cyprus. The English-Speaking Examiner is responsible for conducting Online exams and assessing candidates’ performance for the LanguageCert qualification suite, in accordance with stringent assessment criteria and processes.

The Online Test Center operates 24/7/365.

As an English-Speaking Examiner, your tasks will include the following:

Join the dynamic team at Mercier Consultancy MD as an Online Safety Specialist, utilizing your expertise in Czech and English to help foster a secure online environment. This position includes the exciting benefit of paid relocation to Sofia, Bulgaria! In this role, you will be pivotal in monitoring online content, enforcing safety guidelines, and ensuring a positive user experience.

Key Responsibilities

• Monitor and review user-generated content and interactions to detect any violations of community safety policies.
• Investigate reported incidents rigorously, using strong analytical skills to assess cases and determine appropriate actions.
• Work closely with various teams to develop and implement effective online safety policies and procedures.
• Analyze safety trends and prepare comprehensive reports to present findings and recommendations to management.
• Stay informed of the latest online safety challenges and suggest proactive measures to mitigate risks.
• Provide guidance and support to users regarding safety practices to cultivate a safer online community.

Requirements

Mercier Consultancy MD is excited to announce an opening for a Portuguese Speaking Search Engine Agent based in Greece. This unique role offers a fresh professional experience as it involves no calls, emails, or chats. Instead, you will engage with search engine evaluation tasks that contribute to improving the accuracy and relevance of search results for Portuguese-speaking users.

Key Responsibilities

• Evaluate and analyze search engine results to ensure they meet quality standards and user intent.
• Provide feedback on search relevance, accuracy, and user satisfaction based on established guidelines.
• Identify issues and areas for improvement in search algorithms and report findings to the relevant teams.
• Perform regular testing of search features and functionalities to enhance user experience.
• Stay updated on industry trends and changes to search engine technology to provide informed recommendations.

Requirements

About the Job

Join Excelya, where Audacity, Care, and Energy define who we are and how we work. We believe in creating bold solutions and fostering an inclusive environment where collaboration and individual growth go hand in hand.

The Clinical Innovation Project Manager will play a pivotal role in driving innovation within clinical trials, enhancing processes, and implementing best practices to improve study designs and outcomes. This is an excellent opportunity for proactive individuals who are passionate about advancing clinical research through innovative solutions.

Main Responsibilities

About the Job

Join Excelya, where Audacity, Care, and Energy define who we are and how we work.
We believe in creating bold solutions and fostering an inclusive environment where collaboration and individual growth go hand in hand.

We are looking for a Manager – Tissue and Cell Bank to join our dynamic R&D team and oversee activities related to tissues, fluids, tumors, PDX, organoids, lysates, and subcellular fractions.
In this key position, you will drive the development and evolution of the Tissue and Cell Bank in line with the target R&D organization, ensuring excellence in quality, compliance, and operational performance.

Main Responsibilities:

Applied AI Engineer

Location: NYC (100% On-site in Soho)

Compensation: $150,000 - $225,000 (Base Salary) + Competitive Equity

We are building the world's largest network of doctors, patients, and first-party data, applying AI to every step of bringing new therapies to market. Our first product ensures patients get life-changing therapeutics as quickly and cheaply as possible by abstracting complex insurance, affordability, and supply chain logistics. Backed by top-tier investors, we are seeking an Applied AI Engineer to take end-to-end responsibility for projects that drive user growth, operational efficiency, and revenue generation.

This is a demanding, high-autonomy role focused on the production use of LLMs and ML to solve core business problems in the highly complex healthcare and life sciences space. You will operate as an owner, driving impact across the product surface area and influencing business decisions.

If you join, you will: