About Ctrl Alt

Ctrl Alt is designing and operating the on-chain infrastructure powering digital capital markets globally. We bring together a unique blend of expertise in financial markets and cutting-edge in-house technology to deliver tailored, compliant solutions in the alternative assets space. S…

About Anthropic

Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working toge…

LawnStarter is the nation's leading on-demand platform for lawn care and landscaping services, and our vision is to be one-stop shop for all outdoor home services. Over the past 10 years, we've grown to 120 metro areas, raised $35 million in funding, and acquired our biggest competitor, solidifying…

Role Overview

As a Senior Backend Engineer at CardNexus, you'll play a pivotal role in designing and implementing the architecture for our all-in-one TCG platform. As an early employee, you'll have the autonomy to shape our systems and infrastructure, ensuring scalability, performance, and reliabilit…

About Raiku

Raiku is reengineering blockchain infrastructure from first principles to make global digital markets as precise and dependable as physical systems. Built on Solana, our platform delivers deterministic execution, guaranteed inclusion, and low-latency performance—solving the foundational f…

About Anthropic

Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working toge…

About Extsy

Extsy is a next-generation crypto exchange that combines world-class trading technology with lifestyle-driven financial experiences. We're on a mission to make digital assets part of everyday life, with products that are secure, scalable, and user-focused.

We're building our QA team from t…

About Allora Labs

Allora Labs is on a mission to commoditize all forms of intelligence. Operating at the intelligence layer of the AI stack, we believe that building at the intersection of crypto and AI is the optimal path to achieving our mission. Our team is dedicated to pioneering new frontiers in…

About Arize

AI is rapidly transforming the world. As generative AI reshapes industries, teams need powerful ways to monitor, troubleshoot, and optimize their AI systems. That’s where we come in. Arize AI is the leading AI & Agent Engineering observability and evaluation platform, empowering AI enginee…

About us

• At Sierra, we’re creating a platform to help businesses build better, more human customer experiences with AI. We are primarily an in-person company based in San Francisco, with growing offices in Atlanta, New York, London, Paris, Madrid, Munich, Singapore, Japan, and Sydney.
• We are guided by…