Founding Full Stack Software Engineer (Backend/AI Focus)

Location: Los Angeles, CA, US (On-site)

Employment Type: Full-time

Salary Range: $160K - $225K

We are a rapidly growing, Y-Combinator-backed (YC X25) startup operating at the intersection of AI and Cybersecurity. We are building fully autonomous, in-house AI agent systems designed to solve critical, large-scale problems in modern web application security. Join a small, high-impact founding team to define and build the core technology from the ground up.

We are seeking a skilled and passionate Founding Full Stack Software Engineer with a strong focus on backend development and AI systems. You will be responsible for designing, developing, and maintaining highly scalable, high-performance web applications and our cutting-edge AI Agent platform.

We’re looking for a remote Full Stack Developer based in Jordan or Egypt passionate about modern architectures, seamless user experiences, and scalable backend systems to join our growing engineering team.  

Job Overview  

As a Full Stack Developer, you will design and build serverless and microservice-based applications leveraging AWS technologies. You’ll work across the stack from creating intuitive React interfaces to developing scalable Node.js APIs ensuring performance, reliability, and maintainability across our platforms.  

Key Responsibilities  

• Design and develop serverless and microservice architectures using AWS Lambda, API Gateway, and related services.  

• Build responsive, high-quality front-end interfaces using React.  

• Develop and maintain robust back-end APIs using Node.js.  

• Collaborate with cross-functional teams to deliver scalable, high-performance solutions.  

• Implement and maintain CI/CD pipelines for smooth deployment and updates.  

• Ensure system reliability, security, and scalability through clean and efficient code.  

Qualifications  

UX Designer - Web3 Live Sports Gaming

Location: Remote - Preference for UK as thats where the majority of the team are based, 2nd preference is EU - fully remote.

Compensation: $75K - $120K

We are a rapidly growing, stealth-mode team building the ultimate digital playground for the world's most passionate football fans. Our mission is to make the match-day experience more engaging, social, and fun by blending speed, robust data, and vibrant design. We are looking for a highly creative and user-focused UX Designer to define the look, feel, and function of our web and mobile applications, translating complex live sports data into intuitive interfaces.

You will be instrumental in leading the UX strategy for our core Web platform, where the majority of live fan interaction occurs. Your focus will be on designing interfaces that are intuitive, glanceable, and performant even during the most chaotic moments of a live game. You will own the design system, drive optimization through testing, and collaborate closely with engineering to ensure pixel-perfect implementation.

Key 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:

Senior Full Stack Engineer - On-Chain Economic Security

Location: Remote - Preference for NYC - Or Remote USA or Tel Aviv (classed as Europe) to work EST hours

Compensation: $144K - $164K

We are the first automated, on-chain economic security system, enabling crypto protocols to optimize risk management and capital efficiency while safeguarding user funds. Our platform uses world-class custom EVM simulations to analyze protocol mechanics and is trusted by leading DeFi platforms to secure billions of dollars in assets. We are seeking a proactive and results-driven Senior Full Stack Engineer to build data-driven dashboards and tools that support our critical risk analysis.

You will take full end-to-end ownership of projects, translating high-level goals into technical strategy and execution. This role involves deep collaboration with our research and protocol teams to deliver high-quality frontend and backend components. You will be instrumental in visualizing protocol risk insights via intuitive, data-rich interfaces and evolving our core Alert Portal.

Key Responsibilities:

Staff Frontend Engineer - Global Trade Comment Network

Location: New York City (Hybrid)

Compensation: $180K - $250K

We are building the global trade comment network, a protocol designed to solve the core problem of discovery in trading: what to buy and why. Our solution allows users to comment on their trades and see the trade comments of others, turning trading into a high-frequency social activity. We are backed by world-class investors and are seeking a highly experienced Staff Frontend Engineer to build and scale our mobile and web applications.

This is a high-impact role requiring deep experience in building and scaling complex mobile and web applications that power high-frequency social interactions. You will own the responsibility for ensuring a smooth UX and sub-second rendering across feeds of thousands of items, tackling meat-and-potatoes software engineering challenges to deliver a reliable and engaging product across devices.

Key Responsibilities & Projects:

Senior Backend Engineer - High-Volume Fintech & Payments Platform

Location: Remote - Based in LATAM / EST /Europe

Compensation: $130K - $180K

We are a technology company building the next generation of money and financial products. We are seeking a Senior Backend Engineer to design and build the core backend systems that power our fintech and payments platform. This role requires deep technical expertise in high-scale transaction systems and strong product awareness to deliver reliable, secure, and impactful solutions.

You will be responsible for the full lifecycle of our backend services, focusing on architecting, building, and operating systems that handle high-volume financial transactions securely and reliably. You will act as a technical leader, driving feature delivery and raising the engineering bar across the team while ensuring our systems align with business priorities.

Key Responsibilities:

Senior Fullstack Engineer - Web3 User Acquisition Platform

Location: Remote - US (EST Preferred)

Compensation: $150K - $200K

We are a leading web3 user acquisition platform that has powered user onboarding for over 500 protocols since 2021, facilitating over 500 million transactions and serving over 3 million users across 40+ chains. Our platform, which includes gamified activations and unique on-chain credentials, is infrastructure for major players across DeFi, gaming, AI, and NFT ecosystems. Backed by $21M in total funding, we are seeking a highly experienced Senior Fullstack Engineer to own end-to-end feature delivery across our core platform and new initiatives.

In this high-impact role, you will take full ownership of major product features from conception through deployment. You will be instrumental in driving architectural decisions for both frontend and backend systems, ensuring performance and scalability across our complex, multi-chain platform. You will collaborate directly with the Head of Product and Founders to shape product strategy, establish best practices, and mentor other engineers.

Key Responsibilities:

Principal Engineer (Remote Outside US) - Real-World Asset Minter Infrastructure

Location: Remote - Europe or on the East Coast for South America/Canada (No US)

Compensation: $200K - $225K

We are building a critical piece of infrastructure that is the first live Minter on a major protocol. Our system transforms real-world collateral, such as U.S. Treasuries, into on-chain monetary building blocks ($M). This programmable, composable foundation allows builders to create their own application-specific digital dollars. We are seeking a Principal Engineer to take full-stack ownership of the systems that power this creation and distribution.

This role begins as a high-impact Senior Individual Contributor position with broad autonomy to define architecture and set engineering practices, designed to grow into a technical leadership role. You will work directly with leadership to execute a clear, productized system vision. Your focus will be on building the institutional-grade infrastructure that enables automated minting, multi-chain liquidity, and key integrations.

Key Responsibilities:

About the Role
The UI Designer crafts visually compelling, intuitive, and consistent interfaces for digital products. You’ll translate complex functionality into user-friendly interfaces and design systems that promote clarity, confidence, and delight.

Key Responsibilities

• Create visually engaging and accessible designs for web and mobile applications.
• Develop and maintain scalable design systems and component libraries.
• Design clear, effective data visualizations for insights and recommendations.
• Define UI patterns for transparency, user control, and error handling.
• Collaborate with UX Designers, Product Managers, and Engineers to deliver polished, high-performing interfaces.
• Build interactive prototypes to validate designs and gather feedback.
• Incorporate feedback and usability data to continuously refine designs.

Requirements

• 3+ years of experience in UI Design or Visual Product Design.
• Strong portfolio showcasing UI design for digital products.
• Proficiency in design tools like Figma, Adobe XD, or Sketch.
• Understanding of responsive design, accessibility, and usability principles.
• Strong collaboration and communication skills.

Nice to Have