Senior Data/AI/ML Software Engineer

Location: Remote (US Only) or Hybrid (San Francisco Bay Area)

Employment Type: Full-time

Salary Range: $150K - $300K (Varies by level and location)

We are building a cutting-edge Clinical Data Intelligence platform that automates complex, low-level cognitive tasks involving clinical data and knowledge. We are seeking a highly experienced Senior Data/AI/ML Software Engineer to design, implement, and improve the core components of our system, leveraging advanced AI/ML/NLP techniques to dramatically increase efficiency in healthcare.

This role requires expertise across software engineering, AI/ML, and data engineering, with a focus on building data-intensive systems that empower clinicians and improve healthcare operations.

What You'll Do:

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.

Applied AI Engineer

Location: NYC (On-site, 5 days/week)

Employment Type: Full-time

Salary Range: $150K - $225K

We are a rapidly growing, well-funded technology company operating at the intersection of AI, Software Development, and the Healthcare/Life Sciences industry. We are building a foundational network and applying advanced AI techniques to revolutionize how new life-changing therapies reach patients. This is a demanding, high-autonomy role with end-to-end responsibility for driving measurable business impact. Visa sponsorship is available.

As an Applied AI Engineer, you will be responsible for leveraging LLMs and various Machine Learning techniques to solve critical business problems, automate complex processes, and create groundbreaking AI applications across our product suite. This role requires a deep understanding of the business domain to ensure your technical output directly drives user growth, operational efficiency, and revenue generation.

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:

Principal Software Engineer - Blockchain Wallet Infrastructure

Location: Remote - Location: European Union (remote-first, office optional) Paris/ France is always preferred. Or as close as possible.

Compensation: $145K - $240K

We are a stellar team of leaders and experts building the backbone of blockchain wallet infrastructure for the next financial era, specializing in cryptography, security, and distributed systems. We are seeking a Principal Software Engineer to lead the design, development, and scaling of our core backend systems. This is a high-impact, leadership role focused on making key architectural decisions and ensuring our platform is fast, resilient, and secure under the high-stakes demands of financial workflows.

You will own mission-critical projects end-to-end, acting as a technical leader who drives engineering standards and the long-term vision. This role involves deep technical execution alongside strategic collaboration with product, security, and executive leadership to align technical roadmap with business goals.

Responsibilities:

Senior/Lead Backend Engineer - FinTech & Crypto Innovation

Location: Remote - Fully remote across Europe - they can do B2B or hire through EoR.

Compensation: $120K - $140K

We are seeking a Senior/Lead Backend Engineer to help us revolutionize the FinTech and crypto industry. This is a fast-paced environment where you will solve complex banking and crypto problems, translating them into elegant, efficient, and resilient architectural solutions. Your ability to deliver high-quality code makes you a pillar of our engineering team.

You will work directly with the product team, owning the design, development, and deployment of mission-critical services that power our next-generation financial platform. Your focus will be on building highly scalable and resilient backend systems that handle core banking functions, blockchain integrations, and serve data to our applications.

What You'll Be Working On:

Senior/Lead Backend Engineer - FinTech & Crypto Innovation

Location: Remote - Fully remote across Europe - they can do B2B or hire through EoR.

Compensation: $120K - $140K

We are looking for a Senior/Lead Backend Engineer obsessed with good architecture, efficiency, and resilience to help us revolutionize the FinTech and crypto industry. This role is for a pillar of our engineering team who thrives in a fast-paced environment, solving complex banking and crypto problems with speed and elegant, resilient solutions.

You will work directly with the product team, owning the design, development, and deployment of mission-critical services that power our next-generation financial platform. Your focus will be on building scalable, robust backend systems that handle core banking functions, blockchain integrations, and serve data to our mobile and web applications.

What You'll Be Working On:

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:

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: