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.

🔗 Senior EVM & Web3 Engineer - Enterprise Distributed Ledger

Location: Remote - US - Open to Europe if happy to overlap with EST

Compensation: Competitive

We are a fast-growing software company dedicated to supporting and servicing an open source, proof-of-stake platform that is EVM-compatible. This network is specifically built to meet the needs of enterprise and Web3 applications, prioritizing speed, security, and stability. We are seeking a seasoned Smart Contract Engineer to join our team, focusing on developing both the core Java services and the Web3 APIs (JS/TS) that process transactions across our network.

You will be a high-impact, hands-on programmer, spending approximately 80% of your time designing, coding, and testing. Your primary focus will be enhancing EVM compatibility and improving the developer experience (DevEx) for users migrating from other EVM chains. This includes both low-level transaction processing in Java and high-level API development for public consumption.

Key Responsibilities:

Senior Blockchain Engineer - Wallet Infrastructure & Integrations

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: $160K - $240K

Join a stellar team of leaders and experts in blockchain technology, cryptography, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Senior Blockchain Engineer to lead the design, development, and scaling of the components that connect our platform to every major blockchain network. This role is both hands-on and strategic, focusing on speed, resilience, and security under high-stakes financial workloads.

You will own the entire lifecycle of blockchain integrations, from low-level data indexing to high-level API design and smart contract development. You will improve our indexing and monitoring infrastructure, ensure secure integrations across diverse networks, and build tools that make our wallet platform faster and easier for partners to adopt.

Key Responsibilities:

Staff Software Engineer - Distributed Ledger Execution

Location: Remote - US

Compensation: $ Competitive

We are a fast-growing software company committed to supporting, developing, and servicing an open source, proof-of-stake platform. This EVM-compatible Distributed Ledger Technology (DLT) is specifically built to meet the needs of enterprise and Web3 applications, prioritizing speed, security, stability, and sustainability. We are seeking a Staff Software Engineer to be a technical leader on our core Execution Team.

You will be responsible for delivering software services, business logic, and APIs within the core Consensus Node—the heart of our DLT. This is a high-impact role requiring deep passion for solving technical challenges involving distributed execution, state management, transaction lifecycles, and economic systems (fees, rewards). You will drive technical direction, optimize performance, and mentor engineers within a highly collaborative, open-source environment.

Key Responsibilities:

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:

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 Backend Engineer - Decentralized Perpetual Exchange

Location: Remote - US or EU if willing to overlap 6+ hours with ET

Compensation: $180K - $300K

We are the largest decentralized perpetual exchange on a leading Ethereum Layer 2 solution, processing over $20 billion in cumulative trading volume. Our mission is to bring global markets on-chain, enabling leveraged trading of real-world assets (commodities, forex, indices, stocks) alongside crypto, all with full self-custody. Backed by top-tier investors, we are a small team scaling critical infrastructure handling billions in volume and are seeking an exceptional Senior Backend Engineer who deeply understands crypto infrastructure.

You will build and scale the high-reliability systems that power our exchange, directly impacting billions in trading volume. This role requires navigating the entire stack, from reading blockchain state and decoding oracle message signatures to building high-performance APIs and data pipelines. You will be comfortable working close to the protocol layer while owning critical infrastructure that processes thousands of trades daily.

Key Responsibilities:

Senior Backend Engineer - Stablecoin Infrastructure

Location: Remote - Based in EST timezone

Compensation: $175K - $225K

We are a technology company building a full-service platform that transforms how money moves. Our mission is to make digital dollars the core of a new, global financial fabric—faster, more efficient, and universally accessible. We are creating foundational infrastructure that makes issuing, managing, and integrating stable, dollar-based value on-chain seamless for developers, fintechs, and institutions. We are backed by world-class investors and are growing a team to reimagine how value moves online.

We are seeking a Senior Backend Engineer to accelerate the delivery of both critical internal tooling and high-impact customer-facing products. You will join a small, high-performance team that applies the discipline of high-performance finance to a fast-moving, crypto-native startup environment.

In this role, you will:

Software Engineer (Backend/AI)

Location: San Francisco, CA (100% On-site)

Compensation: $140,000 - $300,000 (Base Salary) + Significant Equity

We are a rapidly growing AI company that helps AI teams ingest real-world enterprise data with state-of-the-art accuracy. Our platform trains vision models and integrates LLMs to read unstructured documents (like PDFs and spreadsheets), enabling customers to build products and automate processes at scale. With rapid 7x YOY revenue growth and over $100M in funding, we are seeking a highly skilled Backend/AI Engineer to work on our core document processing API.

This is a high-agency, full-development-lifecycle role where you will build and optimize the core infrastructure that makes state-of-the-art document understanding accessible at scale for hundreds of companies, from startups to large enterprises.

The core work will include:

Location: Remote (US or Canada)

Compensation: 180,000 - 270,000 (Base Salary) + ISO Options

We are a high-growth, market-leading software company operating in the B2B data space, empowering everyone to take action on their data. We're pioneering a new operational paradigm in marketing by leveraging an AI Decisioning platform that allows non-technical users to set goals and guardrails for personalized customer interactions.

We are seeking a Senior Full Stack Engineer with a strong focus on the front end (70-80% front end, 20-30% back end) to join our fast-moving team. You will be instrumental in developing the intuitive interface that integrates complex machine learning models, unlocking advanced growth and marketing capabilities for our customers.

As a Senior Full Stack Engineer, you will own the end-to-end development of features for a new generation of marketing and growth products, ensuring a seamless and powerful user experience.

Key Responsibilities: