Senior Platform Engineer at Flux | San Francisco

Join Our MissionAt Unlearn, we are revolutionizing clinical development to create smarter trials. Our innovative use of data, artificial intelligence, and digital twins accelerates the process of delivering life-saving treatments to patients. This vision fuels our collaboration with biopharmaceutical companies as we transform the planning, execution, and analysis of clinical trials.We are setting the standard for the future of clinical development by leveraging unparalleled scientific credibility and AI-driven precision, making decision-making clearer and trials more robust. Our goal is not just to disrupt the pharmaceutical landscape but to foster meaningful change.We firmly believe that AI will shape the future of medicine, and we are dedicated to cultivating that future in a responsible and collaborative manner with our clinical development partners.About Our TeamOur team embodies a diverse range of expertise, from machine learning to marketing, yet all Unlearners share core attributes:Ambitious: We embrace challenging goals without hesitation.Disciplined Experimenters: We break down larger objectives into manageable tasks, meeting frequently to monitor progress and iterate swiftly.Gritty: We are resilient; setbacks only motivate us to strive harder.Receptive to New Ideas: We resist complacency and welcome innovative thinking.Storytellers: We prioritize sharing information effectively, ensuring it is engaging and informative.Team-Oriented: Our mission takes precedence over everything; we prioritize the company and team over individual pursuits.Founded in 2017 and headquartered in San Francisco, Unlearn has attracted top-tier investors such as Altimeter, Insight Partners, Radical Ventures, 8VC, DCVC, and DCVC Bio, successfully completing a $50 million Series C funding round in January 2024.If our mission and culture resonate with you, we encourage you to apply.

Our Mission and VisionAt Unlearn, we are dedicated to revolutionizing clinical development through innovative technologies. Our goal is to make every clinical trial smarter by utilizing advanced data analytics, artificial intelligence, and digital twins. This enables us to conduct faster and more reliable studies, ultimately bringing life-saving therapies to patients more efficiently.We are on a mission to redefine the future of clinical development with unparalleled scientific integrity, transforming uncertainty into AI-driven precision for clearer decision-making and stronger trials. Our objective is not merely to disrupt the pharmaceutical industry but to instigate meaningful, long-lasting change.We firmly believe that AI will shape the future of medicine, and we are committed to building that future responsibly and collaboratively with our clinical development partners.About Our TeamOur diverse team brings together expertise from various fields, including machine learning and marketing. Unlearners share essential characteristics:Ambitious: We embrace challenging goals with enthusiasm.Disciplined Experimenters: We break large objectives into manageable tasks, regularly tracking our progress and iterating swiftly.Resilient: Setbacks motivate us to strive harder.Open to New Ideas: We resist complacency and welcome innovation.Storytellers: We prioritize sharing knowledge in engaging ways.Team-Oriented: Our mission takes precedence over individual interests.Founded in 2017 and headquartered in San Francisco, Unlearn has attracted significant venture capital from esteemed investors, successfully completing a $50 million Series C funding round in January 2024. If our values resonate with you, we encourage you to apply.Core ResponsibilitiesQMS Documentation & Evidence MaintenanceOversee document control processes, including version management and review cycle tracking.

Our Mission and VisionAt Unlearn, we are on a transformative journey to revolutionize clinical development, making every clinical trial smarter and more efficient. Leveraging the power of data, artificial intelligence, and digital twins, we enable rapid and robust studies that expedite the delivery of life-saving treatments to patients. Our commitment to this mission shapes every facet of our partnerships with biopharmaceutical companies, as we redefine how clinical trials are conceptualized, executed, and analyzed.We are at the forefront of clinical development, instilling unmatched scientific credibility and replacing uncertainty with AI-driven precision. This clarity empowers stronger decision-making and enhances trial efficacy. Our goal is not just to disrupt the pharmaceutical sector; we aim to create meaningful and lasting change.We firmly believe that AI will shape the future of medicine, and we are dedicated to building this future responsibly, rigorously, and in collaboration with our clinical development partners.About Our TeamOur diverse team hails from various backgrounds, including machine learning, marketing, and more. Regardless of our origins, all Unlearners embody common traits:Ambition: We embrace big, challenging goals without hesitation.Disciplined Experimentation: We decompose our large objectives into manageable tasks, meeting frequently to monitor progress and adapt swiftly.Resilience: Setbacks motivate us to strive harder, as we never back down.Openness to Innovation: We resist complacency and thrive on new ideas.Effective Communication: Sharing knowledge is crucial, and we aim to make our interactions engaging.Team Orientation: We prioritize our mission first, the company second, the team third, and individual goals last.Founded in 2017 and headquartered in San Francisco, Unlearn has garnered investment from leading venture firms like Altimeter, Insight Partners, Radical Ventures, 8VC, DCVC, and DCVC Bio, successfully closing our $50 million Series C funding round in January 2024.If our mission and culture resonate with you, we encourage you to apply.

About HyperspellHyperspell is revolutionizing the Memory & Context Layer for AI Agents.AI agents are brilliant yet lack context.While AI agents excel in standardized testing, they struggle with real-world applications. Today's cutting-edge agents lack the contextual understanding that humans naturally acquire through diverse interactions. This context evolves with their tasks.Hyperspell empowers AI agents with contextual awareness by integrating with users' workspace data, creating a tailored memory and context layer.Our ValuesWe are committed to shaping the future through bold innovations. Our goal is to establish ourselves as the indispensable context layer for organizations, enabling all their AI agents to connect seamlessly. We embark on this journey not because it is easy, but because it is significant.We prioritize care — for our customers, their success, the future of AI, and most importantly, for one another. As we build the frontier of AI, we strive to be one of the most technologically advanced yet profoundly human companies in history — a place where we can enjoy shaping the future together.Our InvestorsOur vision is supported by esteemed investors such as Y Combinator, Afore Capital, Scribble Ventures, and Pioneer Fund. Our angel investors include leading figures from OpenAI, Anthropic, xAI, and DeepMind, alongside respected founders from Silicon Valley like Siqi Chen (Runway) and Julian Weisser (On Deck).Our FoundersFounded in 2024 by Conor Brennan-Burke and Manu Ebert, Hyperspell is driven by experienced leaders. Conor previously spearheaded growth at Checkr, overseeing a $30 million API product portfolio and earning the title of 'the most helpful founder in YC'.Manu brings over 15 years of expertise in machine learning and AI, having successfully sold two companies and led high-growth engineering teams at Airbnb. Interestingly, he acquired his first .ai domain in 2014, needing to send a fax to the domain authority in Anguilla to do so.About the RoleAs our founding platform engineer, your mission will be to construct the infrastructure that makes Hyperspell feel magical — swift, dependable, and effortlessly scalable. You will be responsible for the foundation upon which our entire product is built, ensuring that when customers entrust us with their data, we uphold their trust.

About the RoleJoin our dynamic team at allinbits as a Platform Engineer, where your expertise will be vital in designing and maintaining the robust infrastructure that supports our cutting-edge projects. Your role will combine technical acumen with strategic insight, ensuring our development and operational environments are finely tuned for optimal performance, reliability, and scalability.We prioritize experience in our team, especially if you have transitioned from a developer role into DevOps or Site Reliability Engineering (SRE). Your capacity to innovate and construct resilient systems will prove invaluable.In this position, you will utilize tools such as Ansible, Docker, and Hashicorp Nomad to enhance our operations.

About UsAt Speak, we are on a mission to transform the way individuals engage with language learning.Learning a new language has the power to transform lives, unlocking opportunities in diverse cultures, careers, and communities. With two billion people globally seeking to learn a language, the most effective method—one-on-one tutoring—remains difficult to access on a large scale and has seen little innovation for decades. Speak is pioneering an AI-driven, human-level tutoring experience that fits in your pocket: a conversation-first platform enabling learners to practice speaking, receive immediate feedback, and advance through meticulously crafted lessons. Our approach provides a comprehensive journey from novice to confident speaker in multiple languages.Launched in South Korea in 2019, Speak has quickly risen to become the leading language learning application in the region, catering to learners across various markets in over 15 languages. As one of the foremost AI companies globally, we have secured over $150 million in venture capital from prominent investors such as OpenAI, Accel, Founders Fund, and Khosla Ventures, with a distributed team operating across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.About This RoleAs a Platform Engineer at Speak, you will play a pivotal role in enhancing the reliability and resilience of our systems that support the global language learning experience. You will lead initiatives to scale our infrastructure, fortify our platform, and ensure our services are fast, accessible, and dependable for millions of users worldwide.Your work will span our entire tech stack—from Kubernetes on GCP to our Node.js APIs, Postgres, and Redis—creating robust infrastructure and operational tools. You will take charge of incident response, observability, and SLOs, fostering a culture of reliability throughout the engineering organization.With Speak's rapid growth, we are continuously pushing our systems to their limits. This is a unique opportunity to influence the future of our platform as we scale to accommodate the next tenfold increase in users.

Why Join Flux?At Flux, we are simplifying the complexities of hardware development by pioneering the world’s first AI Hardware Engineer. Our mission is to democratize access to cutting-edge hardware technology and transform the global landscape of electronics design and manufacturing.About the PositionAs a Platform Engineer at Flux, you will play a crucial role in ensuring that our platform operates seamlessly. Your work will extend beyond the editor, encompassing essential features such as billing, authentication, onboarding, and integrations.You will be responsible for delivering features that enhance user experience, maintaining operational integrity, and facilitating the scalability of Flux’s platform.Key ResponsibilitiesDevelop and sustain user-centric platform functionalities (billing, authentication, onboarding, settings).Integrate and sustain third-party APIs (e.g., Stripe, Firebase, analytics).Create backend services using TypeScript/Node and frontend components with React.Enhance the reliability and performance of core platform functionalities.Implement standards for observability, logging, and error tracking.Collaborate with cross-functional teams to design APIs that support new products and integrations.Document architecture and best practices pertinent to your domain.Required QualificationsMinimum of 5 years of professional software engineering experience.Proficiency in TypeScript, Node.js, and React is essential.Experience in integrating and maintaining third-party APIs is required.Demonstrated success in deploying full-stack web applications.Familiarity with cloud hosting environments (GCP/AWS/Firebase) and basic CI/CD practices.Strong debugging and cross-system troubleshooting capabilities.Excellent communication skills, both written and verbal; ability to thrive in asynchronous, remote team settings.Preferred QualificationsExperience with multi-tenant SaaS applications or collaborative web platforms.Familiarity with authentication frameworks (OAuth, JWT, Firebase Auth).Experience with observability tools (Sentry, Datadog, Grafana).Background in developing internal tools or administrative dashboards.

Role overview Axiom Bio is looking for a Platform Engineer to join the team at the San Francisco Global HQ. The focus is on building and supporting scalable platforms that enable bioinformatics research. What you will do Collaborate with colleagues from a range of disciplines to design, implement, and maintain platforms for scientific teams Create systems that streamline research workflows and improve efficiency Support projects aimed at advancing bioinformatics capabilities Location This role is based on site at Axiom Bio's San Francisco Global HQ.

Founding Platform & Reliability Engineer About OpenArtOpenArt is a revolutionary AI-driven storytelling and visual creation platform utilized by millions around the globe. Our mission is to build the next generation of creative tools powered by advanced AI technology, allowing users to generate videos, visuals, characters, and narratives with speed and creativity never seen before. We envision a future where creativity is inherently AI-native, and we are at the forefront of this transformation. Why Join OpenArt?Be part of a small, dynamic team where senior engineers are responsible for significant systems, not just fragments.Contribute to large-scale projects, with your work impacting millions of users swiftly.Benefit from a founder-led engineering culture where both founders are technical and actively engaged in product and architectural decisions.Work on an AI-native product, crafting how state-of-the-art AI models translate into tangible user experiences.Experience high ownership with minimal bureaucracy, emphasizing judgment, clarity, and speed.Join us during a period of significant growth, with a 7-10X revenue increase over the past two years, and play a pivotal role in scaling the company to new heights. About the RoleWe are seeking a Founding Platform & Reliability Engineer to take charge of the design, scalability, and reliability of our entire infrastructure stack, from high-level architectural choices to hands-on implementation, observability, and cost management.This role is not suited for traditional operators or narrow DevOps specialists. You should be adept at navigating cloud infrastructure, distributed systems, backend services, and developer tools, making practical decisions that optimize product velocity, system reliability, and cost efficiency, particularly in a fast-paced AI-centric landscape.You will collaborate closely with the founders and product engineers to design and refine the platform that powers OpenArt, influencing key decisions like serverless versus containerized architecture, multi-provider AI reliability, and scaling systems for millions of users, while serving as a force multiplier for the entire engineering team. What You’ll DoEstablish and operationalize SLOs/SLIs across essential user journeys (generation, editing, payments/credits, uploads, etc.), utilizing them to guide prioritization (including error budgets).Lead the design and implementation of robust infrastructure solutions that effectively support OpenArt's rapid growth and evolving needs.

Join Perplexity as a skilled Software Engineer, where you will play a pivotal role in developing the next-generation AI Foundation and Platform. Our mission is to transform how individuals search and engage online. In this exciting position, you will contribute to building Perplexity's comprehensive AI data, evaluation, and personalization infrastructure, which underpins nearly all of our agent products.Technology Stack: Spark | AWS Data Stack (S3, RDS, DynamoDB, Docker, EKS, Kinesis) | Pytorch | Databricks | Snowflake | LLM APIsAs we continue to expand our user base and diverse use cases, our data stack ensures that millions around the globe receive fast, personalized answers.

Join Our Team:At Notion, we empower individuals and teams to create stunning tools for their professional journeys. In a landscape filled with countless applications, Notion stands out by providing a cohesive platform that integrates documents, notes, projects, calendars, and emails. With built-in AI capabilities, we streamline workflows and enhance productivity. Our diverse user base, ranging from freelancers to major companies such as Toyota, Figma, and OpenAI, appreciates Notion’s versatility, which aids in saving both time and resources.We believe in the power of in-person collaboration, hence all employees are expected to work from our offices on Mondays, Tuesdays, and Thursdays—our designated Anchor Days. Depending on team requirements, additional in-office days may be necessary.Role Overview:As a Client Platform Engineer, you will spearhead the management of our endpoint infrastructure across macOS, Windows, iOS, and Android. Your mission will be to design and implement scalable, automated solutions that ensure secure deployments and optimize operational efficiency. Collaboration with IT, Security, and Engineering teams will be key as you adopt modern endpoint management practices using automation, Infrastructure-as-Code (IaC), and monitoring strategies.Your Objectives:In this role, you will:Architect, implement, and sustain a high-performance endpoint management infrastructure for macOS, Windows, iOS, and Android, emphasizing top-tier security.Enhance endpoint management through custom software development utilizing industry-standard open source tools and proprietary solutions.Utilize modern Infrastructure-as-Code (IaC) techniques and establish GitOps-driven methods for collaborative fleet management on a large scale.Create and manage CI/CD pipelines for fleet management infrastructure, ensuring deployments across rigorously tested environments in Azure, AWS, and GCP.Promote the adoption of cutting-edge CPE technologies and industry best practices to enhance process scalability and operational efficacy.Collaborate with cross-functional teams to provide seamless endpoint experiences while adhering to stringent security protocols and elevating quality standards.Essential Skills:Strong command of modern programming languages such as Python, Golang, or TypeScript.Proven hands-on experience with Kandji and Microsoft Intune, or equivalent cloud identity management solutions.Demonstrated proficiency in endpoint management and security practices.

Join Us at AirwallexAirwallex is redefining the financial landscape with our cutting-edge unified payments and financial platform tailored for global enterprises. Our innovative mix of proprietary infrastructure and software empowers over 200,000 businesses around the globe – including prominent names like Brex, Rippling, Navan, Qantas, and SHEIN – to seamlessly manage their business accounts, payments, spend management, treasury, and more, all on a single integrated platform.Founded in Melbourne, we pride ourselves on a diverse team of over 2,000 forward-thinking professionals across 26 offices worldwide. With a valuation of $8 billion and backing from top-tier investors such as T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, Airwallex is at the forefront of crafting the global payments and financial ecosystem of the future. If you're ready to embark on a transformative career journey, we invite you to join our mission.What We Look ForWe seek builders who embody an entrepreneurial spirit and are eager to make a tangible impact. You possess deep expertise in your field and a keen intellect, driven by our mission and operating principles. You are quick to act, possess sound judgment, and approach challenges with curiosity, balancing the swift execution of ideas with thorough analysis.Collaboration is key; you excel at transforming innovative concepts into viable products while ensuring that tasks are executed seamlessly from inception to completion. Leveraging AI, you work efficiently and creatively tackle complex challenges alongside exceptional colleagues, paving the way for your professional advancement as we shape the future of global finance. If this resonates with you, let’s create what’s next together.Your RoleAs the Engineering Director for the GTPN (Global Treasury and Payment Network) Team, you will be pivotal in enhancing Airwallex's payment infrastructure. Your focus will be on expanding the capabilities and user experience of our global treasury and payment network while developing innovative payment solutions grounded in a robust financial architecture. We are looking for a highly skilled and proactive leader to guide this dynamic team as we continue to broaden our global footprint.In this role, you will supervise multiple feature teams across Transfers, Client Treasury, and GTPN Infrastructure. Your technical prowess as an engineer, combined with your leadership skills, strategic product insights, and business acumen, will distinguish you as a leader in our organization.

At Browserbase, our Platform Services team is integral to delivering seamless and robust backend services and APIs that empower our products. We focus on providing both internal and external developers with a fast, reliable, and user-friendly foundation. From crafting elegant interfaces to managing vital services in production, our team is at the core of Browserbase’s operations.ResponsibilitiesDesign, develop, and maintain backend services and APIs essential for Browserbase’s diverse product offerings.Create service architectures that prioritize reliability, clarity, maintainability, and extensibility.Collaborate with product and engineering teams to understand requirements and deliver intuitive APIs and service abstractions.Oversee projects from initiation to completion, including design, implementation, rollout, monitoring, and ongoing maintenance.Enhance developer experience with comprehensive documentation, tools, and thoughtful interface design.Diagnose and resolve operational challenges in production systems.Contribute to establishing standards for service architecture, API design, testing, and operational excellence.

Join Trunkio, where our mission is to enable teams to develop high-quality software swiftly. We have collaborated with engineering teams at top-tier companies like Google X, Zillow, and Brex to identify build failures, manage flaky tests, and enhance code deployment speed without compromising reliability. Although AI has accelerated code writing, the delivery process remains a challenge due to merge conflicts, inconsistent code quality, and other productivity-draining issues. Our goal is to help engineering teams focus on the design, implementation, and delivery of exceptional software, resulting in more fulfilling work experiences. We are currently developing a CI Reliability Platform that empowers teams to deliver code efficiently.Founded in 2021 by industry veterans from Uber, Google, YouTube, and Microsoft, Trunkio has successfully raised a $25M Series A led by Initialized Capital and a16z, with backing from notable investors including Haystack Ventures and the creators of GitHub, Apollo GraphQL, and Algolia.We are seeking a passionate and skilled Senior Software Engineer to join our Platform/Data Engineering team. In this pivotal role, you will design and optimize data ingestion pipelines to manage large volumes of real-time and batch data from diverse sources. Your expertise will be vital in creating systems that are scalable, reliable, and performant, while also ensuring seamless data integration across our ecosystem.

Join our innovative team at Harvey as a Software Engineer focusing on our AI Platform. In this role, you will leverage cutting-edge technologies to develop and enhance AI-driven solutions that empower our users and transform industries. You will collaborate with cross-functional teams to design robust software architectures and implement scalable solutions that meet the needs of our diverse clientele.

Join middesk as a Software Engineer specializing in our Data Platform, where you will play a pivotal role in building robust systems that empower our data-driven initiatives. You will collaborate with cross-functional teams to design, implement, and optimize data solutions that enhance our products and services.

Join the Fluidstack TeamAt Fluidstack, we’re pioneering the infrastructure for advanced intelligence. We collaborate with leading AI laboratories, governmental entities, and major corporations—including Mistral, Poolside, and Meta—to deliver computing solutions at unprecedented speeds.Our mission is to transform the vision of Artificial General Intelligence (AGI) into a reality. Driven by our purpose, our dedicated team is committed to building state-of-the-art infrastructure that prioritizes our customers' success. If you share our passion for excellence and are eager to contribute to the future of intelligence, we invite you to be part of our journey.Role OverviewThe Inference Platform team at Fluidstack is at the forefront of addressing the cost and latency challenges associated with frontier AI. You will play a crucial role in managing the serving layer that connects our global accelerator supply with the production workloads of our clients, which include LLM serving frameworks, KV cache infrastructure, and Kubernetes orchestration across multiple data centers.This hands-on individual contributor role combines elements of distributed systems, model optimization, and serving infrastructure. You will oversee the entire lifecycle of inference deployments for leading AI labs, striving for enhancements in throughput, cost-efficiency, and response times, while also influencing the architectural decisions that guide Fluidstack’s deployment strategies.

Who Are We?Postman is recognized as the leading API platform globally, empowering over 45 million developers and 500,000 organizations, including 98% of the Fortune 500. We are dedicated to transforming the API landscape by simplifying every phase of the API lifecycle, fostering collaboration, and enabling users to create superior APIs with increased efficiency.Headquartered in San Francisco, we also have offices in Boston, New York, Austin, Tokyo, London, and Bangalore—our founding city. As a privately held company, we have received support from notable investors such as Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. To learn more about our vision, visit postman.com or connect with us on X at @getpostman.P.S: We highly recommend reading The 'API-First World' graphic novel to gain insights into our vision at Postman.The OpportunityAs a Staff Engineer for the Desktop Platform, you will lead the technical direction of our Electron-based desktop application, which is utilized by over 40 million developers worldwide. Your expertise will influence its architecture, performance, and security for the foreseeable future.This role is primarily focused on individual contributions. You will engage in both design and implementation while serving as the technical cornerstone for our Desktop Platform. Your responsibilities will include defining architecture, developing essential features, and mentoring fellow engineers, ultimately guiding Postman’s evolution across various desktop operating systems.About the TeamThe Client Platform organization is tasked with providing a streamlined pathway for developing, testing, and releasing Postman’s web and desktop applications. We manage the frameworks, SDKs, build tools, shared libraries, and infrastructure that our product engineers depend on daily. Our platform serves as the foundation for hundreds of Postman engineers to deliver new features and enhancements to over 40 million users.Within this group, the Desktop Platform team focuses on Postman’s integration with Electron and OS-level infrastructure. Our team ensures that Postman is easily installable, consistently updatable, and performs optimally across Windows, macOS, and Linux. We collaborate closely with the Client SDK and Build/Release teams to guarantee a seamless user experience.What You’ll DoLead the architecture of Postman’s Electron-based desktop application.Design and implement core desktop functionalities, including installers, auto-updates, and OS integrations.Enhance performance across desktop platforms, optimizing startup times, memory, and CPU utilization.

tvScientific seeks a Machine Learning Platform Engineer to help shape the company’s advertising technology. This position can be based in San Francisco, CA, or performed remotely from anywhere in the United States. Role overview This role focuses on building and refining machine learning models that drive the core of tvScientific’s advertising platform. The work combines technical skill with creative problem-solving to support the platform’s effectiveness. What you will do Develop and optimize machine learning models to enhance advertising performance Collaborate with team members to deliver solutions that balance innovation, scalability, and reliability Apply technical expertise to address challenges at the intersection of technology and creative thinking Location Candidates may work from San Francisco, CA, or remotely within the US.