React Jobs

pika

Pika is building the next generation of AI creative tools to make video creation seamless, intuitive, and accessible to everyone. We are seeking a Principal Product Engineer to lead the technical vision, architecture, and roadmap for user-facing systems. In this high-impact role, you will guide the engineering direction for features serving millions of creative users, from intuitive UIs and collaboration tools to real-time interactions and advanced generative AI experiences. You will work closely with product, design, and engineering leadership to deliver robust, scalable, and delightful features, influencing both immediate user experience and long-term product vision from conception to launch and iteration.

LangChain is seeking a Senior Fullstack Engineer to join the LangSmith team, which builds the core platform for observability, evaluation, and production reliability of AI systems. This role offers the opportunity to shape the technical direction of the platform, working closely with enterprise customers, developer end-users, and internal stakeholders. You will lead the technical architecture and implementation of key product features, collaborating with product and design teams, and driving aggressive project timelines while maintaining high engineering standards. The position emphasizes writing clean, maintainable, and well-tested code, with a "get stuff done" attitude and strong ownership mindset.

$175k - $240k

Amplitude is seeking a Senior Software Engineer to join their Statsig team, which is redefining how companies learn, iterate, and ship better experiences. This role offers the opportunity to shape both the product and technical direction of a system used by sophisticated product teams worldwide. You will work across the full stack, utilizing NextJS and Node.js, to build intuitive, high-performance experiences that make experimentation accessible, powerful, and trustworthy. This is a hands-on role where you will own critical product surfaces end-to-end, drive product direction in partnership with design and product leaders, and build and evolve scalable systems.

$165k - $247k

Physical Intelligence is seeking a Software Engineer focused on AI productivity to build and deploy tools that enhance AI utilization across the company. This role involves close collaboration with various teams, including engineering, research, and operations, to identify opportunities for AI leverage and translate them into robust internal tools and workflows. The position is within the Runtime team, which focuses on core systems for operational and research efficiency, alongside engineers working on build systems, infrastructure, and developer productivity. The primary focus will be on AI tooling, making AI agents, assistants, integrations, and automation valuable across the organization.

ClickHouse is seeking a Senior Software Engineer to spearhead the development of AI/ML-powered features within ClickHouse Cloud. This role involves integrating high-performance database technology with AI capabilities, building end-to-end solutions that span from the Inference API layer to user interfaces. The goal is to enhance how users interact with and derive value from their data through AI-driven enhancements.

$147k - $238k

Harvey is transforming legal and professional services by integrating frontier agentic AI with an enterprise-grade platform. This role offers a unique opportunity to contribute to a rapidly scaling company that is defining a new category in real-time. The team values decisiveness, simplicity, and a commitment to continuous improvement, seeking individuals who are driven to do their best work alongside like-minded colleagues. The future of professional services is being shaped at Harvey, and the company is just beginning its journey.

$231k - $340k

Harvey is transforming legal and professional services by integrating advanced agentic AI with an enterprise-grade platform. This role offers a unique opportunity to contribute to a rapidly scaling company that is defining a new category in real-time. The team values decisiveness, simplicity, and a commitment to continuous improvement, seeking individuals who are driven to do their best work alongside like-minded professionals. The future of professional services is being shaped at Harvey, and this is just the beginning.

$231k - $340k

Artos is seeking a talented, startup-minded engineer to accelerate the development of their R&D documentation platform for biopharma companies. As a core member of the engineering team, you will play a critical role in building, scaling, and expanding the Artos platform. You will work across the full stack, developing intuitive product experiences, robust backend systems, and AI-powered workflows that help life sciences companies bring life-saving treatments to patients faster. This role offers meaningful ownership over both the product and the technology, working on challenging problems at the intersection of AI, enterprise software, and life sciences.

$190k - $260k

We are seeking a curious and thoughtful Product Engineer to join our team and help build cutting-edge AI-powered video creation and collaboration tools. This role involves developing new interfaces for AI content creation, building LLM-powered features and conversational experiences, and deploying generative models to production. You will work on a wide variety of exciting challenges in a fast-paced, high-ownership environment, collaborating with a world-class engineering team.

$240k - $290k

Taktile is seeking a Senior Full-Stack Engineer to join their Agent team, which is building a platform for creating, publishing, and executing AI-powered agents to automate complex workflows in financial services. This role will involve building and shipping production features across the entire stack, from the agent runtime and tool orchestration layer in the backend to the conversational copilot experiences users interact with daily. You will work alongside experienced engineers, contribute to product impact, and grow your skills in a fast-moving, high-ownership environment.

Replit

Replit is seeking an AI Agent Security Architect to be the primary technical authority for the security blueprint of Replit's autonomous and AI agents. This role involves designing, implementing, and maintaining runtime defense systems, guardrail frameworks, and sandboxing architectures for AI agents that execute code and invoke tools on the platform. The successful candidate will lead high-impact AI security initiatives, bridging the gap between AI behavior and cybersecurity controls for both technical and executive audiences.

$0k - $0k

Sierra is seeking a Software Engineer Intern to work directly on production AI agents for their customers. This internship offers hands-on experience in designing and developing AI agents, shipping features, and learning from real-world use cases at scale. The role is ideal for individuals eager to contribute to and learn from the rapidly evolving field of AI.

Sierra is a leading platform for customer-facing AI agents, partnering with major brands to transform customer service and business growth. We are primarily an in-person company based in San Francisco, with a culture guided by values of Trust, Customer Obsession, Craftsmanship, Intensity, and a commitment to balancing Family. Our co-founders bring extensive experience from leading tech companies like Salesforce, Facebook, and Google, with one co-founder currently serving as Board Chair of OpenAI.

$150k - $180k

Thinking Machines is building AI that extends human will and judgment, and we're looking for individuals passionate about creating a human-centric future. In this role, you will design and build an end-to-end evaluation platform crucial for developing frontier AI systems. This platform will empower researchers to easily author, run, and analyze model evaluations at scale, supporting both standardized benchmarks and internal research needs. You will collaborate closely with various teams to enhance how we evaluate models and translate results into research decisions.

$300k - $350k

Thinking Machines is building AI to extend human will and judgment, developing frontier models and crafting interfaces for human-AI communication. We are seeking a Software Engineer to join our full-stack team, which works closely with researchers to build systems that accelerate research and engineering velocity. You will own key parts of our internal platform, including evaluation and training libraries, experiment-tracking systems, and visualization tools. This role involves identifying researcher bottlenecks and transforming them into reliable, generalizable systems, requiring strong technical judgment, cross-functional collaboration, and product intuition. Success means building systems that researchers trust, rely on daily, and find delightful to use.

$300k - $350k