TypeScript Jobs

Harvey

Harvey is transforming legal and professional services by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. We are a fast-scaling company with strong product-market fit, offering a unique opportunity to build a generational company. Our team is driven, takes ownership, and is committed to our mission, valuing decisiveness, simplicity, and continuous improvement. We are looking for individuals who want to do the best work of their careers alongside like-minded, driven people.

LangChain is seeking an Engineering Manager to lead the team responsible for building LangSmith, our observability and evaluation platform for LLM applications. This role involves defining the technical direction, nurturing a talented engineering team, and collaborating with product and design to deliver features that empower developers to build and deploy trustworthy AI systems. You will play a key part in shaping the future of AI observability at scale, contributing to a company that has raised $125M and is experiencing rapid growth.

$200k - $250k

OpenAI

The Codex Web Layer team is responsible for the web-based systems and user experiences for Codex, spanning the entire stack from the application framework to the in-app browser. In this role, you will design and implement infrastructure and features end-to-end for the Codex desktop client application, helping to define the future of hybrid agentic/interactive web browsing. This position offers a unique opportunity to work on a critical and rapidly growing product within a small, experienced team, contributing to a platform that integrates from the OS level to user interaction design.

Scale AI

Scale's Global Public Sector team is focused on using AI to address critical challenges facing the public sector worldwide. We create custom AI applications impacting millions of citizens, generate high-quality training data for national LLMs, and provide upskilling and advisory services to spread AI's impact. As a DevOps Engineer, you will design and develop core platforms and software systems, supporting orchestration, data abstraction, data pipelines, identity & access management, security tools, and underlying cloud infrastructure. We are enabling the public sector to transform operations and better serve citizens through cutting-edge technology.

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are seeking a Software Engineer, Agent to design and deliver production-grade AI agents that are mission-critical and drive revenue. You will own the Agent Development Life Cycle (ADLC) from pilot to iteration, building, tuning, and evolving AI agents in production environments. This role involves partnering directly with leaders at large enterprises and cutting-edge startups to understand their business challenges and build AI agents that transform operations at scale. Your work will also influence the evolution of Sierra's core platform, surfacing unmet needs and prototyping new tools, shaping the future of AI agent development.

LangChain is seeking a Senior Fullstack Engineer to join the newly formed Growth & Monetization team. This high-impact role will focus on building foundational product features and integrations that drive user acquisition, rapid experimentation, and self-serve expansion. You will work across the full stack, from polished user interfaces to backend APIs, to create seamless growth stories for developers and enterprise customers. This is a 0→1 opportunity to build growth systems from the ground up, partnering closely with product, design, GTM, and analytics teams to streamline activation, optimize packaging, and deliver a delightful developer experience.

$175k - $240k

OpenAI

OpenAI is seeking a backend engineer to adapt its API platform for strategic cloud environments, starting with AWS. This role involves building backend services, APIs, SDK integrations, authentication flows, and cloud service infrastructure to enable developers to use OpenAI capabilities within their existing cloud environments. You will work across teams, sometimes embedded with partner product groups, to ship products quickly and across multiple platforms simultaneously. This is an excellent opportunity for engineers who have experience building developer tools, particularly AI-powered ones, can communicate effectively across technical disciplines, and can design architectures supporting diverse deployment models.

Reflection ai

Reflection is a research lab dedicated to making intelligence open and accessible for everyone to use, customize, and build on. We are seeking an exceptional technical lead to build and scale our Forward Deployed Engineering function within the AI Solutions team. This role is critical in bridging our cutting-edge AI research with real-world enterprise deployments. As a Forward Deployed Engineer Lead, you will own the end-to-end technical strategy, execution, and delivery of complex agentic applications, from early pre-sales discovery through production deployment.

Reflection ai

Reflection is a research lab dedicated to making intelligence open and accessible. We are seeking a core member for our Applied AI team to lead Forward Deployed Engineering efforts with enterprise customers. This role involves translating advanced AI research into high-impact, real-world applications, owning the technical strategy and delivery of agentic systems from discovery to production launch.

Scale AI

Scale GP (Scale Generative AI Platform) is an enterprise-grade Generative AI platform that provides APIs for knowledge retrieval, inference, evaluation, and more. We are looking for a strong engineer to join our team and help us build and scale our product in a fast-paced environment. The ideal candidate will have a strong understanding of software engineering principles and practices, as well as experience with large-scale distributed systems. You will be responsible for owning large new areas within our product, working across backend, frontend, and interacting with LLMs and ML models. You will solve hard engineering problems in scalability and reliability.

OpenAI

We are seeking an experienced software engineer to join our Cloud Agents team, which focuses on building and scaling the product infrastructure for long-running agents in the cloud. This includes developing systems for orchestration, sandboxing, isolation, secure connectivity, secrets management, observability, reliability, and cost controls. You will play a key role in designing and operating systems that orchestrate agents at scale, working closely with product engineers across ChatGPT, API, and Codex to define essential abstractions and enable rapid product development. A strong background in backend or infrastructure development, particularly with Python, Rust, distributed systems, cloud infrastructure, or product platforms, is highly valued.

Stability AI

Stability AI is seeking a Senior Product Engineer to lead the ground-up development of PLG growth and lifecycle infrastructure for their music and audio products. This greenfield role spans web, desktop, plugin, and mobile platforms, requiring you to select the technology stack, design the event model, implement integrations, and manage the system. The ultimate goal is to create a measurable and attributable funnel from anonymous users to paying customers and account expansion. This position is at the nexus of growth marketing, product lifecycle management, and community-driven PLG, focusing on systems that drive conversion within the product.

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are seeking a Software Engineer, Voice to contribute to our innovative AI products. This role involves working on cutting-edge challenges in speech-to-text, speech synthesis, real-time audio processing, and scaling our infrastructure to handle millions of calls daily. You will also be involved in building real-time integrations with telephony systems and call centers.

Sierra is a leading platform for customer-facing AI agents, partnering with major global brands to revolutionize how they serve customers and drive business growth. We are 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.

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are seeking an Agent Builder to contribute to our innovative AI platform. This role involves tackling complex challenges in simulation, content management, and the AI agent development lifecycle. You will adapt traditional software development methodologies for AI agents and explore generative tools to accelerate agent creation and build self-improving systems.

Sierra is building a platform to enable companies worldwide to create better, more human customer experiences using AI. We partner with industry leaders and are primarily an in-person company based in San Francisco, with growing international offices. Our culture is guided by core values: Trust, Customer Obsession, Craftsmanship, Intensity, and Family. The company was co-founded by Bret Taylor and Clay Bavor, who bring extensive experience from leading tech companies like Salesforce, Facebook, and Google.

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are seeking a Software Engineer to join our full-stack data team. You will be instrumental in building systems that enhance the intelligence of our AI agents with every interaction. This role involves developing real-time pipelines, analytics products, and personalization primitives to transform customer conversations into business outcomes. You will contribute to architecting and building our core data platform for low-latency, large-scale data handling, including real-time eventing, streaming and batch ETL, and our data lakehouse. Additionally, you will develop systems for long-term agent memory, reusable Customer Data Platform (CDP) primitives, and optimization loops for personalized interactions that demonstrably improve business results.

Fireworks is seeking a Full Stack Software Engineer to architect, build, and scale its developer-focused web application and shape its end-to-end technical architecture. This role combines hands-on engineering with technical leadership, offering opportunities to mentor engineers, collaborate cross-functionally, and drive innovation in a fast-paced, AI-focused environment. You will be instrumental in delivering scalable, elegant, and highly performant solutions that directly impact hundreds of thousands of developers and the company's product vision. The position involves shaping and shipping the optimal developer journey, encompassing intuitive front-end interfaces, robust APIs, and efficient backend orchestration, integrated with a wide offering of open-source generative AI models.

Decagon is seeking a founding Platform Engineer, Security to design, build, and operate the security infrastructure for its leading conversational AI platform. This is a hands-on builder role focused on creating durable, well-engineered systems, including paved paths for secure service creation, automated security tooling, and infrastructure-as-code. As the first dedicated engineer in this area, you will have a significant impact on shaping the technical direction of the infrastructure security program and investing in automation, observability, and self-service. The work is closely tied to the business, directly enabling high-value deals with security-conscious enterprises.

$200k - $400k

Perplexity is seeking a growth engineer to join their team and own product loops that drive user discovery, adoption, and habit formation around their AI experiences. This role involves working across the entire user funnel, from activation and onboarding to retention and paid upgrades, while also developing applied AI systems to enhance these experiences. Engineers will manage end-to-end projects, including training and deploying classifiers to identify high-intent users, personalizing value discovery, and integrating new AI capabilities to achieve measurable adoption and revenue outcomes. The growth team collaborates closely with product, design, data science, and applied AI teams, translating behavioral signals and model outputs into robust product surfaces. This position offers the opportunity to move fast, run numerous experiments concurrently, and take full ownership of outcomes in a fast-growing startup environment.