Protocol Lead - Rule Enforcement for Regulated Blockchains

Location: remote - north and South America and the EU

Compensation: $180K - $220K

We are building a platform that sets the standard for how regulated blockchain applications enforce transaction rules directly at the smart contract layer. Our system empowers teams to create modular, programmable policies (like AML/CFT checks or off-chain collateral requirements) enforced with cryptographic guarantees before a transaction executes on-chain. We are seeking a Protocol Lead to own the entire smart contract suite, driving robust, scalable risk management for real-world use cases.

As the Protocol Lead, you will have full ownership of the architecture, development, and maintenance of our core smart contract suite. You will be the team's blockchain subject matter expert, defining security best practices, managing audits, and building tooling for seamless integration. This role requires a balance of hands-on coding, security leadership, and cross-ecosystem research (EVM and non-EVM).

Key Responsibilities:

Machine Learning Engineer - Recommendation Systems

Location: London (Office)

Compensation: $250K - $300K

We are a high-growth software development company and a team of elite builders, known for our contributions to one of the largest crypto social networks globally. Our pioneering platform allows anyone to create a coin in under one minute for free, establishing itself as the home for memecoin creation and trading on Solana. The platform has generated over $700 million in revenue and is focused on building the future of social crypto. We are seeking a Machine Learning Engineer to build and scale our core recommendation systems.

You will be responsible for designing, building, and deploying the machine learning systems that drive user discovery and engagement across our rapidly growing platform. This is a high-impact role requiring end-to-end ownership of critical features, ensuring our models scale effectively to handle significant real-time volume and user activity.

Key Responsibilities:

About Signal Ventures: Signal Ventures, the venture capital & strategic investment arm of The Signal Group, is a specialized venture capital firm focused on supporting early-stage technology startups and entrepreneurs in the shipping, logistics, mobility, and commodities sectors. With a track record of over 15 investments, 3 incubation projects, and successful exits for notable companies like OilX and nuTonomy, Signal Ventures is at the forefront of the industry.

About the role: We are currently seeking a highly motivated, analytical and Insightful analyst to join our team on a fixed-term six month contract. The successful candidate will play a pivotal role in managing deal flow and conducting due diligence for a portion of our portfolio. Reporting directly to the SVP of Tech Ventures and working closely with the Signal Ventures team, this role will contribute to the growth and success of Signal Ventures. 

This role is suited for recent graduates (0-2 years of experience) who are eager to get hands-on experience in the VC industry. We value open, rigorous debate and expect this person to bring fresh perspectives, question assumptions, and constructively challenge our thinking. 

Requirements

About the Role
The Experience Lead oversees and guides the end-to-end user experience of advanced digital products. This role combines leadership, strategy, and hands-on design direction to ensure solutions are human-centered, ethical, and impactful. You will champion the voice of the user, align cross-functional teams, and set the direction for how users discover, interact with, and build trust in digital solutions.

Key Responsibilities

• Define the holistic user experience vision and roadmap, ensuring experiences are intuitive, trustworthy, and scalable.
• Lead and mentor a multidisciplinary design team (UX, UI, Research, and Content) to deliver cohesive, high-quality experiences.
• Establish and enforce design principles and frameworks for transparency, error handling, and user control.
• Partner with Product Managers, Engineers, Data Scientists, and Business Stakeholders to align experience goals with product and business strategies.
• Oversee experience architecture across complex product ecosystems, including information structure, navigation, and interaction flows.
• Guide the creation of prototypes and usability testing to validate and refine experiences based on real user feedback.
• Define and track UX success metrics such as adoption, satisfaction, trust, and usability.

Requirements

Validator BD Lead - High-Performance Blockchain Infrastructure

Location: Remote - Europe or North America

Compensation: $140K - $150K

We are reengineering blockchain infrastructure from first principles to make global digital markets as precise and dependable as physical systems. Built on a leading high-performance blockchain, our platform delivers deterministic execution, guaranteed inclusion, and low-latency performance, solving foundational failures that plague current systems. We are building the reliability and control institutions demand, and we are seeking a Validator BD Lead to drive the adoption of this critical infrastructure across the validator ecosystem.

As the Validator BD Lead, you will own and drive the validator engagement strategy, serving as a critical, high-ownership role that will shape our go-to-market efforts and partnership model as we prepare for mainnet. You will lead efforts to build relationships with top-tier validators and ensure successful adoption of our infrastructure.

Key Responsibilities:

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:

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