Fullstack Engineer - Member of Technical Staff

At Magic, we are on a mission to create safe AGI that propels humanity forward in tackling the world's most pressing challenges. We believe that the key to achieving safe AGI lies in automating research and code generation, allowing us to enhance models and ensure alignment more reliably than human capabilities alone. Our innovative approach integrates frontier-scale pre-training, domain-specific reinforcement learning, ultra-long context, and advanced inference-time computing to realize this vision.About the Role:We are seeking a passionate individual to spearhead developer experience and data tooling within our pre-training data team. This role involves creating internal tools and infrastructure that enhance team productivity, including dashboards, command-line interfaces (CLIs), data exploration UIs, and the systems that interconnect them.Focusing on developer experience and tooling, we need someone who enjoys solving problems, deploying solutions quickly, and experimenting with new ideas.Potential Projects:Lead tooling initiatives across the architecture: develop systems, implement continuous integration, create CLI utilities, and design internal web interfaces.Design internal tools for dataset exploration, data labeling, quality assessment, and data inventory management.Enhance data infrastructure ergonomics—optimizing IO patterns in Ray/dataflow jobs, improving dataset tracking, and enhancing pipeline observability.Spot opportunities by engaging with the team, understanding their challenges, and proactively refining workflows.Elevate standards for code organization, packaging, and engineering best practices.What We Are Looking For:Preferred QualificationsSolid foundation in software engineering principles.Genuine interest in developer experience and best practices for code organization.Effective communicator, adept at collaborating with teammates to understand their requirements.Proactive mindset—identifies issues and implements solutions.Local to San Francisco (this role requires in-office attendance).Ideal Background (in order of importance)Open source contributor—experience with tools similar to Ruff, uv, or other developer-centric projects.Experience in build systems and CI—has developed or overseen build systems, CI pipelines, or developer tools on a large scale.Data pipeline experience—understanding of optimizing data workflows and data handling.

At Composio, we are developing advanced infrastructure that enables agents to seamlessly interact with essential work tools such as GitHub, Gmail, Notion, Salesforce, and more. Our dedicated team of engineers is committed to tackling challenges ranging from contextual understanding to search functionalities, ensuring we provide an exceptional bridge between your agents and their tools.Having secured a $25M Series A funding from Lightspeed, alongside prominent angel investors like Guillermo Rauch (CEO of Vercel), Dharmesh Shah (CTO of HubSpot), and Gokul Rajaram, we have experienced remarkable growth, tripling our ARR at the start of this year. Our clientele includes notable names from Y Combinator cohorts to Wabi, Glean, Zoom, and beyond.Your RoleEnhance the experience of teams utilizing our platform by refining our core APIs and SDK.Create intuitive interfaces for both frontend and SDK applications.Take ownership of product development from concept through to production.Collaborate closely with customers to cultivate their loyalty while enhancing the product.Craft clear and concise documentation.

At Stuut AI, we are revolutionizing accounts receivable for B2B companies, enhancing collections to be smarter and more efficient. Our platform is increasingly being adopted by finance teams in various sectors, including industrials, chemicals, and manufacturing, with clients ranging from Fortune 10 enterprises to growing midmarket firms. Our innovative approach is supported by esteemed investors such as Andreessen Horowitz, Khosla Ventures, Activant, 1984 Ventures, and Page One.Position OverviewWe are seeking a dedicated Technical Staff Member focused on Internal AI Tooling. This pivotal role will involve constructing the foundational systems that allow Stuut to scale effectively. Your primary responsibility will be to design and implement internal infrastructures, automation, and AI-driven workflows to enhance operational efficiency across various departments, starting with marketing and extending to sales, operations, and product development.This is a significant role for a proactive individual who thrives on transforming manual or disjointed processes into scalable systems. Collaboration with leadership and cross-functional teams will be essential as you design AI agents, automation pipelines, and internal tools that streamline operations and unlock new capabilities.We are transitioning to an agent-first model, not only in our products but also in our operational approach. This role is central to that evolution.

At Catalog, we are pioneering the commerce infrastructure for AI—creating the essential framework that enables digital agents to not only explore the web but also comprehend, analyze, and engage with products. Our innovations drive the future of AI-driven shopping experiences, fundamentally transforming how consumers discover and purchase items online.Role OverviewAs a Technical Staff Member, you will be instrumental in developing core systems, shaping our engineering culture, and transitioning our vision from prototype to a robust platform. This role requires full-stack expertise and a commitment to owning and resolving challenges from start to finish.Who You AreYou have experience creating beloved and trusted products from the ground up.You combine technical proficiency with a keen product sense and data-driven intuition.You are well-versed in AI technologies.You prioritize speed, write clean code, and ensure thorough instrumentation.You seek a high level of ownership within a small, talent-rich team based in San Francisco.Challenges You Will TackleDevelop and deploy agentic-search APIs that deliver structured and real-time product data in milliseconds.Build checkout systems enabling agents to conduct transactions with any merchant.Create an embeddings and retrieval layer that optimizes recall, precision, and cost efficiency.Establish a product graph and ranking pipeline that adapts based on actual user outcomes.Preferred QualificationsProven experience shipping data-centric products in a live environment.Experience with recommendation systems or information retrieval methodologies.Familiarity with API development, search indexing, and data pipeline construction.Our Work CultureWe operate with a small, high-trust, and highly motivated team, fostering an environment of in-person collaboration in North Beach, San Francisco. Our process involves debate, decision-making, and execution.If your profile aligns with our needs, we will contact you to arrange 2-3 brief technical interviews, followed by an onsite meeting in our office where you will collaborate on a small project, exchange ideas, and meet the team.

Join our dynamic team at Sentry as a Staff Software Engineer specializing in AI Developer Tooling. In this pivotal role, you will contribute to the development and enhancement of cutting-edge AI tools that empower developers worldwide. Collaborate with cross-functional teams to identify challenges and deliver innovative solutions that optimize the software development lifecycle.

About TierZero TierZero helps engineering teams use AI to build and ship code more efficiently. The platform targets the bottleneck of human speed in production, giving teams tools for faster incident response, better operational visibility, and shared knowledge. TierZero is backed by $7M in funding from investors including Accel and SV Angel. Companies like Discord, Drata, and Framer trust TierZero to strengthen their infrastructure for AI-driven engineering. Role Overview: Founding Member of Technical Staff This is an on-site role based at TierZero’s San Francisco headquarters, with three days a week in the office. As a founding member, direct collaboration with the CEO, CTO, and early customers shapes the direction of both product and systems. The work spans hands-on development and close engagement with users and leadership. What You Will Do Design and build intelligent AI systems to analyze large volumes of unstructured data. Deliver full-stack features based on real user feedback. Improve the product experience so AI agents are both reliable and easy for engineers to use. Develop systems that automatically evaluate LLM outputs and advance agentic reasoning using self-play and feedback loops. Create machine learning pipelines, including data ingestion, feature generation, embedding stores, retrieval-augmented generation (RAG), vector search, and graph databases. Prototype with open-source and new LLMs, comparing their strengths and weaknesses. Build scalable infrastructure for long-running, multi-step agents, with attention to memory, state, and asynchronous workflows. What We Look For Over five years of relevant professional or open-source experience. Comfort working in environments with uncertainty and evolving challenges. Strong product focus and a drive for customer satisfaction. Interest in large language models (LLMs), Model Control Planes (MCPs), cloud infrastructure, and observability tools. Previous startup experience is a plus. Location This position is based in San Francisco. Expect to work on-site three days per week at TierZero’s HQ.

TierZero builds tools that help engineering teams deliver and manage code efficiently. The platform enables quicker incident response, clearer operational visibility, and shared knowledge among engineers. Backed by $7 million from investors like Accel and SV Angel, TierZero supports clients such as Discord, Drata, and Framer as they strengthen infrastructure for AI-driven work. This in-person role is based at TierZero's San Francisco headquarters, with a hybrid schedule requiring three days onsite each week. As a founding member of the technical staff, work directly with the CEO, CTO, and customers to influence the direction of TierZero’s core products and systems. The position calls for flexibility as priorities shift and close collaboration across the company. What you will do Design and develop AI systems that handle large volumes of unstructured data. Build full-stack product features, informed by direct feedback from users. Enhance the product so agents are intelligent, reliable, and easy for engineers to use. Create systems to automatically evaluate outputs from large language models and improve agentic reasoning through self-play and feedback. Construct machine learning pipelines, including data ingestion, feature creation, embedding stores, retrieval-augmented generation (RAG) pipelines, vector search, and graph databases. Experiment with open-source and emerging large language models to compare different approaches. Develop scalable infrastructure for long-running, multi-step agents, including memory, state management, and asynchronous workflows. Requirements Interest in working with large language models, managed cloud platforms, cloud infrastructure, and observability tools. At least 5 years of professional experience or significant open-source contributions. Comfort with shifting priorities and tackling new technical problems. Strong product focus and commitment to customer outcomes. Openness to learning from a team with a track record of delivering over $10 billion in value. Ability to work onsite in San Francisco three days per week. Bonus: Experience in a startup setting and familiarity with startup dynamics.

tierzero seeks a Founding Member of Technical Staff to play a key role in building the company’s technology from the earliest stages. This position is based at the San Francisco headquarters and offers the chance to collaborate directly with founders and engineers. Role overview As an early team member, you will help design and develop new products and systems. The work involves close collaboration with others in the office, shaping both the technical direction and the culture of the engineering team. What you will do Develop core technology in partnership with founders and engineers Contribute ideas and code that guide the evolution of tierzero’s products Help define engineering standards and establish best practices Location This position is based onsite at the San Francisco HQ.

Join our dynamic team at Adyen as a Technical Staff Member in San Francisco! We are seeking innovative minds passionate about technology and problem-solving. In this role, you will collaborate with cross-functional teams to craft solutions that enhance our services and improve customer experiences.

Overview: Due to the increasing market demand and a robust six-month product roadmap, Listen Labs is expanding its engineering team. We seek a technically adept individual (our team includes three IOI medalists) who is eager to contribute to a product that is revolutionizing corporate decision-making. If you are passionate about solving intricate problems from start to finish, we invite you to connect with us.About Listen LabsListen Labs is an innovative AI-driven research platform that empowers teams to swiftly extract insights from customer interviews in hours rather than months. Our technology enables clients to analyze conversations, identify recurring themes, and expedite informed product decisions.Company Highlights:Exceptional Team: Composed of seasoned entrepreneurs (with prior AI exits), co-founders, and experts from leading firms such as Jane Street, Twitter, Stripe, Affirm, Bain, Goldman Sachs, and more, our team is built on a foundation of excellence.Rapid Growth: We are a dynamic team of 40, supported by Sequoia, achieving a remarkable growth trajectory from $0 to $14 million run-rate in less than a year. We prioritize speed, craftsmanship, and collaboration with individuals who embrace ownership.Impressive Traction: We have seen rapid growth across various sectors, securing enterprise clients such as Google, Microsoft, Nestlé, and P&G.Outstanding Performance: Our industry-leading win rate is a direct result of our uniquely differentiated product.Market Validation: We consistently attract customers across every segment, often landing six-figure deals that lead to quick expansions.Viral Product: Our interviews are shared with tens of thousands of viewers, driving product-led growth, organic expansion, and daily inquiries from Fortune 500 companies.Technical Challenges:Research Agent Development: Unlike traditional software purchases, hiring McKinsey involves gaining insights and execution expertise. We are building Listen Labs with that mindset — an AI agent that understands our platform and best research practices, assisting users in project setup, interview execution, and response analysis.Human Database Creation: A core value proposition is our capability to connect users with specific demographics. We are developing a database of millions of individuals, continually enhancing our understanding of user needs as they engage with Listen Labs.

At Magic, we are on a mission to create safe Artificial General Intelligence (AGI) that propels humanity forward in addressing the world's most pressing challenges. We believe that the key to achieving safe AGI lies in automating research and code generation, enabling us to enhance models and solve alignment issues more effectively than humans can do alone. Our innovative approach integrates cutting-edge pre-training, domain-specific reinforcement learning, ultra-long context processing, and inference-time computation to realize this vision.Role OverviewAs a Software Engineer within the Product team, you will play a pivotal role in developing and scaling user-facing systems that leverage Magic’s advanced long-context models.This position encompasses a full development cycle, including frontend and backend development, API creation, and deep model integration. You will take ownership of product features from conceptualization to implementation and iteration, collaborating closely with our Reinforcement Learning Research and Environments teams to transform technical advancements into tangible user experiences.Our long-context models present unique product challenges such as translating complex behaviors into understandable actions, providing user control without overwhelming them, and ensuring reliability during extensive or high-context operations. You will craft systems that render advanced model functionalities intuitive and production-ready.This role offers opportunities for expanded responsibilities in product architecture, defining AI-native interaction patterns, or spearheading significant product initiatives based on Magic’s long-context capabilities.

Greetings! I’m Teddy, the CTO and co-founder of Magic Patterns. Our engineering team has expanded significantly over the past few months, and we are eager to continue this growth!If you are an enthusiastic web engineer, our roadmap holds a treasure trove of projects you've likely been eager to tackle:An infinite canvas featuring live collaborationInnovative intersections of design systems and AIFigma-like intuitive design editingEngaging consumer onboarding processes and funnelsCommunity templates and showcases with impressive componentsCurrently, thousands of teams leverage Magic Patterns to accelerate their software delivery. Our mission to empower product teams from concept to deployment has attracted Fortune 500 clients and cultivated a cherished community. However, we recognize that every day is a new beginning, and we need your expertise!If you thrive in startup cultures, have a passion for AI, and enjoy dynamic, fast-paced settings, we can’t wait to collaborate with you.Our Work Culture:We prioritize purposeful hiring, seeking only top-tier talent. Our compact yet formidable team operates from our San Francisco office, with additional distributed colleagues across North America.Our Core Values:Act decisively — if something can be done in hours, it can be done in minutes.Data-driven decisions — it’s okay to make mistakes; we rely on data to guide our choices.Customer obsession — our customers are the heart of our existence.Ownership — we uphold high standards and craftsmanship.Spread the magic — to many, Magic Patterns is truly 'magical.' Take pride in your contributions and enjoy the journey!Your Role:Develop and deploy high-quality, user-centric features that enhance core product valueWork collaboratively with the team to transition concepts into productionEngage in technical discussions to refine system design and architectureContinuously gather insights from user feedback and data to optimize product performance and user experience

Join Mirendil as a Member of the Technical Staff in our Product Development team! We are seeking innovative minds to help design and implement cutting-edge solutions that meet the evolving needs of our clients. As a key player in our team, you will collaborate with cross-functional teams to drive project success and contribute to the development of our product roadmap.

About Our TeamAt OpenAI, the Developer Experience team is dedicated to empowering developers around the globe. Our mission is to provide exceptional and seamless experiences for developers and startups, enabling them to integrate AI technologies into their applications and products effortlessly. We ensure that our developers have access to the tools, resources, and support necessary to fully harness the power of AI.We create engaging demos, robust developer tools, sample projects, and informative content that illustrate how to build outstanding applications using our advanced models, including OpenAI o3 and GPT-4.1, along with multimodal capabilities and tools like Codex.Our team collaborates closely with product, engineering, research, and go-to-market teams to ensure that the developer journey—from the first API call to full production deployment—is seamless, efficient, and enjoyable.About the RoleAs a Developer Experience Engineer, you will be responsible for creating compelling technical content, innovative developer tools, and sample applications that inspire and empower developers to succeed with OpenAI's APIs and products. You will interact with developers and technical founders, showcasing best practices and building cutting-edge applications powered by our leading models and tools.We are seeking individuals who possess a blend of strong technical abilities, creativity, and a passion for engaging with and empowering the developer community.Key Responsibilities:Design and develop demos and sample applications that highlight innovative integrations and best practices utilizing reasoning models, multimodal capabilities, and agent tools.Produce high-quality technical content—including tutorials, blog posts, videos, and code samples—to educate and inspire developers about our models, APIs, and Codex.Engage actively with and cultivate a vibrant local and global developer ecosystem surrounding OpenAI’s platform.Represent OpenAI at developer events and online platforms, serving as a knowledgeable and approachable advocate for developers.Collect and synthesize developer feedback to inform and enhance our product roadmap.Collaborate cross-functionally with product, engineering, and marketing teams to ensure the successful adoption of OpenAI’s developer tools and APIs.Directly contribute to the improvement and refinement of OpenAI’s developer interfaces and experiences.

tierzero is looking for a Founding Member of Technical Staff to help shape the direction of its technology from the ground up. This role is based at the company's San Francisco headquarters. Role overview As an early technical hire, you will work closely with engineers and product managers to build new products and features. The work centers on designing, coding, and delivering software solutions that address client needs and support tierzero's growth. Impact Contributions in this role will directly influence the company's future. The team values initiative and hands-on problem solving, giving each member a chance to make a visible difference in how the company evolves. Collaboration This position involves regular collaboration with a small, focused team. Input and ideas from every member help guide product direction and technical decisions.

Join Our Team as a Member of Technical StaffAt Eragon, we are on the forefront of innovation, seeking a dedicated Member of Technical Staff to spearhead the development and deployment of state-of-the-art AI systems. This exciting role invites you to collaborate across modeling, systems, and product teams to transform innovative concepts into impactful real-world applications.Your Key ResponsibilitiesSystem Development & Deployment: Design, integrate, and launch AI-driven systems into production environments.Model Development: Refine, assess, and implement machine learning models in practical scenarios.Systems Engineering: Architect scalable pipelines for training, inference, and data processing workflows.Performance Optimization: Enhance system latency, throughput, cost-effectiveness, and reliability.Data & Infrastructure: Manage large-scale datasets and ensure seamless integration with internal tools and APIs.Cross-Functional Collaboration: Collaborate with product, research, and design teams to deliver complete features.Evaluation & Monitoring: Establish evaluation frameworks, monitoring tools, and feedback mechanisms.What You Bring to the TableEducation: A Bachelor's or Master's degree in Computer Science, Engineering, or a related field.Technical Skills: Proficient in Python and familiar with modern engineering or machine learning frameworks.Production Experience: Proven experience in building and deploying systems in production settings.Systems Knowledge: Knowledge of data pipelines, APIs, and cloud infrastructures (AWS, GCP).Practical ML Experience: Hands-on experience with machine learning models or data-centric systems.Preferred QualificationsExperience with deploying or scaling machine learning systems in production environments.Familiarity with large language models, agents, or workflow automation systems.Experience in distributed systems or large-scale infrastructure.A background in fast-paced or early-stage environments.

About Liquid AIOriginating from the prestigious MIT CSAIL, Liquid AI crafts cutting-edge, general-purpose AI systems designed for optimal efficiency across a variety of platforms, from data center accelerators to edge devices. Our solutions prioritize low latency, minimal memory requirements, privacy, and reliability. We collaborate with industry leaders in consumer electronics, automotive, life sciences, and financial services, and as we expand rapidly, we are looking for exceptional talent to join our journey.The OpportunityJoin us at the exciting crossroads of advanced foundation models and the open-source community. In this pivotal role, you will oversee developer relations and community engagement, influencing how our models are adopted, documented, and integrated throughout the AI ecosystem. This unique position allows you to balance impactful community work with essential technical contributions, giving you the chance to shape how our models are represented and utilized by developers worldwide. If you are passionate about excellent documentation, enhancing developer experience, and democratizing access to powerful AI models, this is your chance to influence the future of open-source AI.What We're Looking ForWe seek a proactive individual who:Takes ownership: Manages open-source partnerships from initial outreach to ongoing collaboration.Thinks community-first: Integrates documentation, tutorials, integrations, and support into a seamless developer experience.Is pragmatic: Focuses on developer adoption and partner success rather than superficial metrics.Communicates clearly: Bridges the gap between technical teams and external partners, representing Liquid's interests while fostering genuine relationships.The WorkServe as the primary liaison for open-source partners.Assist in model releases with both marketing and technical content.Create tutorials, articles, and guides on training and utilizing our foundation models.Enhance and maintain LFM documentation for clarity and thoroughness.Collect community feedback and communicate insights to internal teams.

About SentryAt Sentry, we believe that poor software is a thing of the past. Our mission is to empower developers to create high-quality software more efficiently, allowing us to enjoy the technology we love.With over $217 million in funding and a community of more than 100,000 organizations backing our vision, we are developing advanced performance and error monitoring tools used by industry leaders such as Disney, Microsoft, and Atlassian, enabling them to focus on innovation rather than bug-fixing.We embrace a hybrid work model across our global offices, designating Mondays, Tuesdays, and Thursdays as in-office days to foster meaningful collaboration. If you are passionate about creating tools that enhance the digital experience, join us in building the future of software monitoring.About the RoleOur Developer Experience team is expanding in San Francisco! This role is hybrid and requires you to be based at our headquarters. We are searching for an innovative builder with a strong viewpoint on exceptional developer documentation.If you are an individual who enjoys experimenting with the latest features in your favorite tools, loves exploring new JavaScript frameworks, and is frustrated by inaccurate code snippets or documentation, then this role at Sentry is perfect for you. The Developer Experience team merges the excitement of shipping cutting-edge products with ensuring developers can use them effectively.If you are confident in collaborating with Product and Engineering teams to test and launch new features, and possess the ability to dive in and solve complex problems while maintaining a keen eye for quality documentation, this could be your dream job.As part of Sentry's Developer Experience team, you will be a builder constantly seeking ways to simplify the experience for developers using our tools. You will engage with the technical community to understand their challenges, support developers, gather feedback, and assist our product and engineering teams in releasing new features.In this role, you will be expected to bring solutions to the table, propose product strategies, identify necessary resources and partnerships, and execute your plans effectively.

About tierzero tierzero helps engineering teams build and deploy code with greater speed and operational clarity in an AI-driven world. The company focuses on improving incident response, operational visibility, and knowledge sharing for engineers. Backed by $7 million in funding from investors like Accel and SV Angel, tierzero supports large-scale systems for clients such as Discord, Drata, and Framer. Role Overview: Founding Member of Technical Staff This role is based at tierzero's San Francisco headquarters. In-person work is required three days a week. As a founding member of the technical team, you will help design and build core products and systems from the ground up. Collaboration is central: expect to work closely with the CEO, CTO, and customers. Projects span a wide range of technical challenges and product areas. What You Will Do Design and implement intelligent AI systems that process and reason over large volumes of unstructured data. Develop full-stack features, incorporating direct feedback from users. Improve the product experience so intelligent agents are practical and reliable for engineers. Create systems that automatically evaluate LLM outputs and refine agent reasoning using self-play and feedback loops. Build machine learning pipelines covering data ingestion, feature generation, embedding stores, RAG pipelines, vector search, and graph databases. Prototype and experiment with open-source and advanced LLMs to weigh different approaches. Set up scalable infrastructure for long-running, multi-step agents, including memory management, state handling, and asynchronous workflows. What We Look For At least 5 years of professional or open-source experience in a relevant technical field. Comfort working in a setting that changes and evolves quickly. Strong product focus and an understanding of customer needs. Interest in LLMs, MCPs, cloud infrastructure, and observability tools. Ability to learn from and collaborate with engineers who have delivered over $10 billion in value. Commitment to working onsite in San Francisco three days per week. Startup experience is a plus.