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Join Sonsoft Inc. as a Java Architecture and DevOps Engineer, where you will play a critical role in designing, implementing, and optimizing our software architecture. You will collaborate with cross-functional teams to ensure seamless integration and deployment processes, improving efficiency and reliability in our production environments.
Sonsoft Inc. is a leading technology solutions provider based in San Francisco, dedicated to delivering innovative software solutions that empower businesses to thrive in the digital landscape. Our team is passionate about technology and committed to excellence.
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Join our innovative team at bjakcareer as a Backend Engineer specializing in AI Technologies. In this role, you will be responsible for designing, implementing, and maintaining robust backend systems that power our AI-driven applications. You will collaborate with cross-functional teams to develop scalable solutions that enhance user experience and drive eff…
demo.levels.fyi
Join demo.levels.fyi, a trailblazing software company that empowers real-time collaboration on vital workflows. Established in 2012, we proudly serve over 10,000 clients globally and are backed by esteemed investors, including Example Capital. Having successfully raised our Series C, demo.levels.fyi is currently valued at $750 million.As a Backend Engineer, you will be an integral part of our dynamic team, directly reporting to the team manager. This pivotal role will enable you to influence various workflows and contribute to our innovative projects.
Terawatt Infrastructure
Join Terawatt Infrastructure as a Senior DevOps Engineer and play a crucial role in shaping the infrastructure of tomorrow. In this position, you will be responsible for designing, implementing, and maintaining scalable and reliable infrastructure solutions that support our development teams and production environments. Your expertise will directly contribute to the efficiency and performance of our systems.Key Responsibilities:Develop and maintain CI/CD pipelines to automate deployment processes.Collaborate with software engineers to enhance system reliability and performance.Implement monitoring solutions to ensure high availability of applications.Manage cloud infrastructure and optimize cost efficiency.Conduct regular system audits and performance tuning.
About UsOur mission is to revolutionize language learning.Learning a new language can transform lives by providing access to diverse cultures, career opportunities, and communities. With two billion people globally striving to learn languages, the most effective method—one-on-one tutoring—remains difficult to access at scale and has not evolved significantly over the years. Speak is developing an AI-powered, human-like tutor that fits in your pocket, offering a conversation-first approach that allows learners to practice speaking, receive immediate feedback, and progress through thoughtfully designed lessons. This results in a comprehensive journey from novice to confident speaker across multiple languages.Since our launch in South Korea in 2019, Speak has emerged as the leading language learning app, now available to learners in various markets and over 15 languages. As one of the foremost AI companies globally, we have secured over $150 million in venture capital from notable investors such as OpenAI, Accel, Founders Fund, and Khosla Ventures, with a diverse team spread across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.About This RoleWe are seeking a Senior Backend Engineer, with full-stack capabilities, to help create innovative AI-driven product experiences. The ideal candidate should have experience collaborating closely with product, design, and machine learning teams, alongside a proven track record in developing polished consumer applications. This role is pivotal in shaping our latest products focused on programmatic, conversational language learning and will significantly impact the future direction of our company.Your ResponsibilitiesCrafting innovative AI-driven product experiences and user interfaces for the web.Full-stack engineering with a primary focus on designing scalable backend systems.Troubleshooting complex streaming challenges.Taking ownership of the complete development cycle of features from ideation to production.Writing code efficiently, shipping frequently, and making a substantial impact on our business by facilitating the scaling of our content.Your Profile5+ years of industry experience as a Backend Engineer, ideally within a fast-paced startup environment.Bonus: Experience on an app that has reached over 1 million users.Exceptional problem-solving and communication skills, along with the ability to work effectively in a collaborative environment.
Join DoorDash as an Engineering Manager to lead our Backend Frameworks team, where you will shape the technical vision and drive the development of robust backend application frameworks for all engineering teams. Collaborate with senior engineers and stakeholders to enhance platform reliability, velocity, and efficiency. Your role will entail defining and building standards that empower engineers, addressing immediate challenges while anticipating future needs. This position influences our Python, Go, and Kotlin frameworks, combining greenfield projects with established successes. Ideal candidates will be located in San Francisco, Sunnyvale, Seattle, Los Angeles, or New York.
About KiddomKiddom is an innovative educational platform dedicated to fostering student equity and growth by integrating top-tier instructional materials with engaging digital learning experiences. With unparalleled curriculum management tools, Kiddom enables schools and districts to take charge of their curriculum, creating customized learning experiences that cater to the unique needs and aspirations of their communities. Our high-quality curriculum comes equipped with powerful insights for teachers and leaders, driving the ongoing enhancement of instructional strategies, school and district programming, and professional development.The Tooling team at Kiddom is responsible for developing and maintaining the essential systems that empower all engineering teams to produce reliable, scalable, and efficient software solutions. As a Senior Backend Engineer on this team, you will concentrate on crafting backend services, automation frameworks, and internal developer tools that enhance the speed and reliability of our entire platform.Your contributions will significantly influence how Kiddom engineers design, deploy, and monitor systems at scale, with a strong focus on clean, maintainable, and testable code, primarily in Python, with additional opportunities to work with GoLang.
About WeaveWeave is dedicated to transforming the way therapeutic insights are captured, modified, and communicated across the drug development spectrum. Our aim is to empower human experts with advanced AI tools, facilitating the swift, safe, and cost-effective delivery of medications to patients.The Weave Platform enhances regulatory workflows from inception to conclusion, seamlessly integrating AI at every phase. Collaborating with our clients, Weave is crafting the ultimate AI workbench for the entire therapeutic lifecycle.Your Role & MissionWe are on the lookout for a Senior Backend Engineer to work directly under the Backend Engineering Manager. This role requires proficiency in data handling, AI integration, and backend development. Your primary focus will be on ensuring the stability, performance, and reliability of our AI systems. You will be tasked with devising innovative solutions to client challenges, analyzing outcomes, and deploying these solutions into production. Success in this role entails navigating the journey from concept to experimentation, testing, and ultimately production without encountering roadblocks. We prioritize problem-solving over trendy technologies, favoring straightforward, well-tested, and reliable solutions that impress.Your ResponsibilitiesAnalyze customer challenges and convert them into effective solutions.Collaborate with Product and Design teams to swiftly identify solutions.Develop efficient, straightforward code utilizing Django + Python + Postgres + Redis.Manage ongoing conceptual and technical complexities while delivering value in Product initiatives.Integrate and optimize LLM APIs (OpenAI, Anthropic) for document processing and AI functionalities.
About AnonAnon is at the forefront of revolutionizing enterprise automation through our innovative platform designed to deploy authenticated AI agents for critical data workflows.We are addressing one of the most significant challenges in enterprise automation: unlocking and transforming data that is currently inaccessible due to authentication barriers. Our cutting-edge platform empowers AI agents to securely interface with web-based systems, extracting unstructured data and seamlessly delivering it via modern APIs.Since our inception in 2023, we have enabled industry leaders to convert weeks of manual processes into automated workflows that complete in mere minutes. Our efforts have garnered $14M in funding from renowned investors including Union Square Ventures, Forerunner Ventures, Okta Ventures, and Abstract Ventures.Our vision is clear: every business system should be fully accessible to AI agents. If you are passionate about constructing the infrastructure that will drive the next generation of AI applications, we invite you to join our dynamic team of 12 in San Francisco.www.anon.com/careers
About HiveHive is at the forefront of cloud-based AI innovations, offering cutting-edge solutions that enable organizations to understand, search, and generate content with unparalleled efficiency. Trusted by industry giants, we empower developers through a diverse suite of pre-trained AI models, handling billions of API requests monthly. Our proprietary AI models and datasets power transformative applications across various sectors, enhancing content moderation, brand protection, sponsorship analytics, and context-driven advertising strategies.With over $120M raised from top-tier investors such as General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, Hive boasts a global workforce of over 250 talented professionals across our offices in San Francisco, Seattle, and Delhi. If you're passionate about shaping the future of AI, we want to hear from you!About the RoleTo realize our ambitious vision, we aim to expand our elite engineering team. We seek innovative developers who thrive in launching new products and features, are comfortable with autonomy, and possess a fearless attitude towards experimenting with novel technologies. The ideal candidate will have a proven track record in building core services and web-based APIs from scratch, demonstrating a keen interest in both the product and the underlying technology. You should be proficient in creating well-structured, maintainable code that meets high standards of quality and performance.
Join the Mercor Team as a Backend Software EngineerAt Mercor, we stand at the crossroads of labor markets and AI innovation. Collaborating with premier AI research institutions and enterprises, we supply the essential human intelligence necessary for advancing AI technologies.With a vast network of over 30,000 experts, Mercor facilitates the training of cutting-edge AI models, akin to how educators impart knowledge to their students—sharing insights, experiences, and contextual understanding that transcend mere coding. Collectively, our network generates more than $2 million daily.Mercor is pioneering a new work paradigm where specialized expertise drives AI progress. This endeavor requires a bold, dynamic, and highly dedicated team. You’ll collaborate with researchers, operators, and AI innovators who are actively redefining the landscape of society.As a profitable Series C company valued at $10 billion, we operate out of our new headquarters in San Francisco, where our team works in-person five days a week.About the RoleAs a Backend Software Engineer at Mercor, you will be an integral part of a compact, product-centric engineering team responsible for constructing modern backend systems that drive essential workflows for some of the world's leading AI firms. You will oversee projects from inception to completion, designing, developing, and deploying production systems that have a direct influence on our customers. From day one, you will write production-ready code, approach systems with a holistic mindset, and make decisions that correlate directly with business success. Collaborating closely with product and design teams, you will prioritize speed while maintaining high standards for code quality, scalability, and simplicity.Your ImpactYou will be team-matched to one of the following areas where you can make the most significant contribution:Talent Platform Development – Creating next-generation tools that automate the recruiting process end-to-end, intelligently linking candidates with roles, and facilitating global hiring through seamless contracts and payments.Applied AI and Human Data Collaboration – Working alongside top AI researchers from esteemed labs such as OpenAI, Anthropic, and Google to develop post-training datasets aimed at enhancing foundational model performance.Key ResponsibilitiesDesign and implement scalable backend APIs, services, and infrastructure.Collaborate across the tech stack with product and design teams to rapidly deliver features.Write clean, maintainable code and contribute to comprehensive documentation.Participate in code reviews, technical design discussions, and retrospectives.Address real-world challenges with effective engineering solutions.
XOXO AI
About UsXOXO AI is an innovative research laboratory focused on creating intelligent interfaces for everyday life. Our team is composed of passionate engineers, designers, and researchers dedicated to solving unique challenges that affect our lives beyond the workplace.Having achieved significant advancements in our infrastructure, architecture, and model layers, we are now seeking talented builders to help us develop the interface and application layer that will bring our visionary concepts to fruition.About the RoleWe are in search of a skilled Backend Engineer to design, construct, and maintain high-quality production backend systems. This position is ideal for individuals who possess a strong command of cloud infrastructure, distributed systems, monitoring, and data persistence, with a keen emphasis on testing and stability.You will be responsible for overseeing backend projects from initial concept through to production launch, ensuring performance, reliability, infrastructure efficiency, and security are prioritized throughout the development process.What You’ll DoDevelop and manage backend services and distributed systems in a production environment using AWS or GCP.Design data storage and retrieval solutions utilizing a combination of vector, OLAP, SQL, NoSQL, caching, and search systems.Establish and maintain observability practices including monitoring, logging, tracing, and alerting to ensure system health and performance.Create and implement comprehensive testing frameworks that account for deployment and runtime failure scenarios.Take full ownership of backend projects, focusing on complex feature development, CI/CD, Terraform, stability, and security.
Mixpanel
Mixpanel’s Reporting & Analysis team creates tools that help customers understand how people use their products. This work covers metrics such as daily engagement, completion rates for key flows, common user paths, and retention after signup. The dashboards aim for both clarity and depth, giving teams the information they need to make informed decisions and test ideas. What you will do Work with a small group of engineers (typically 2 to 5) to design and build backend systems for analytics dashboards Collaborate closely with product managers and designers to identify the insights users value most Help deliver tools that make complex data accessible and useful for customers How the team works Each engineering group operates with a high degree of autonomy. Teams decide how to approach problems and which solutions best serve Mixpanel’s users. This structure encourages ownership and creativity in building analytics products. Location This role is based in San Francisco with a hybrid work arrangement.
Ivo, Inc.
About Ivo, Inc. Ivo, Inc. builds technology for the legal sector, focusing on tools that help legal professionals work more efficiently. Based in San Francisco, the team has launched several products in recent years, including: An AI-powered agent for MS Word that assists with document editing (2023) Agentic RAG using embeddings models (2023) LLM-based large-scale legal fact extraction (2024) A legal assistant for accurate search across large contract databases (2024) Advanced clustering for related legal documents (2025) Automated deviation analysis to surface hidden risks in contracts (2025) Tools for merging contracts and amendments into a single timeline, giving clients a clear view of their agreements (2025) Role Overview: Backend Software Engineer The Backend Software Engineer will help build and scale systems that address complex legal challenges. This role centers on creating reliable infrastructure and tools to process millions of contracts and support legal teams. What You Will Do Develop systems that process and analyze large volumes of contracts with high reliability Design and implement data pipelines to coordinate LLMs, extraction, and clustering algorithms Build precise search and retrieval systems for legal data Work closely with legal experts and product teams to adapt to new developments in LLMs Our Mission Legal teams in major organizations often face long hours and demanding workloads, especially in contract review. Until recently, technology provided little relief. With advances in LLMs, Ivo aims to restore balance by automating tedious legal tasks. Ivo’s AI-native platform is designed to reduce manual work for lawyers. The software is well-received by users and currently holds an 85% trial win rate, the highest in the market. The team continues to expand what the platform can do. Who We’re Looking For Engineers who enjoy coding, value collaboration, and want to solve challenging problems with creative solutions
Sigma Computing
Role Overview Sigma Computing builds a high-performance data platform aimed at making data accessible and useful. The engineering team focuses on modern data architecture and delivers features that help organizations explore and analyze data efficiently. As the team grows in San Francisco, Sigma is looking for a Senior Backend Software Engineer who enjoys solving complex problems and contributing to a product used by a wide range of users. What You Will Do Tackle challenging problems related to providing interactive experiences on data warehouses for exploration and analysis. Work with technologies including Rust, Go, GraphQL, Node, and Kubernetes. Build backend distributed services, design algorithms, and create APIs for a cloud-based application. Debug, track, and resolve product or system issues as they arise. Design and implement new backend features to support a growing user base. Participate in design and code reviews with teammates and stakeholders to maintain high standards and share knowledge. Location This position is based in San Francisco, CA.
Join code-metal as a Senior Platform DevOps Engineer and play a pivotal role in shaping our CI/CD processes and enhancing the developer experience. In this position, you will collaborate with cross-functional teams to build and maintain robust infrastructure, ensuring seamless integration and deployment of applications. Your expertise will help drive innovation and optimize workflows, enabling our developers to focus on creating exceptional products.
Join Revi as a Senior Backend Engineer and Shape the Future of Retail! At Revi, we're revolutionizing the retail landscape by merging the physical and digital worlds. As pioneers in the emergence of Web 3.0, we are transforming brick-and-mortar experiences into seamless digital interactions. With over three decades of evolution in web technology, we are on the brink of a new era where physical stores can harness the power of the internet to create unparalleled customer experiences.Our mission is to empower businesses with a state-of-the-art in-store digital platform that fosters lasting customer relationships. Our beautifully designed self-ordering system enables consumers to buy, pay, and earn rewards effortlessly. With fresh Series A funding of $14.5 million from top-tier Silicon Valley investors, we are poised to seize a multi-billion dollar market opportunity.Why Join Us Now? This is a pivotal moment for Revi. With our AI-driven in-store platform already live with growing restaurant chains, we are experiencing strong product-market fit and customer demand for new features. This is your chance to make a significant impact on our technical direction while building on a foundation of proven success.
Senior Backend EngineerJoin LiteLLM, the leading AI Gateway trusted by industry giants including Adobe, Netflix, and NASA. Our platform empowers developers with secure and reliable access to Large Language Models (LLMs) and related services. We are currently seeking a dedicated Senior Backend Engineer to contribute to the development of robust guardrails and observability tools at scale.About The RoleIn this role, you'll take ownership of our guardrail and logging implementations. You will oversee backend code to ensure all guardrail interactions are logged accurately, user errors are communicated effectively, and that our observability tools function seamlessly under high traffic conditions. Your meticulous attention to detail regarding latency metrics, logging traceability, and backend guardrail registration will significantly bolster user confidence in our security and compliance capabilities.ResponsibilitiesDevelop and enhance our product to maximize performance, reliability, and ongoing improvements.Ensure guardrail and policy enforcement calls (e.g., applyguardrail) are accurately logged and traceable through our SpendLogs and relevant database tables.Design and implement CPU-level guardrails to mitigate common attacks on LLM APIs, MCP servers, and Agents.Identify and resolve silent failure points in guardrail creation, registration, and policy application—ensuring robust error handling and transparency for end users.Collaborate with observability tools such as Datadog, Splunk, Prometheus, and OpenTelemetry to maintain accurate, configurable, and effective monitoring and logging for backend systems.Enhance observability integrations to manage over 1 billion requests per month with minimal latency and no memory leaks due to Prometheus metrics cardinality.Work cross-functionally on backend engineering priorities including performance, reliability, and security enhancements.What We’re Looking ForBachelor’s or Master’s degree in Computer Science or a related field.4+ years of experience with Python and backend frameworks (e.g., FastAPI, Flask).Strong understanding of logging best practices, error handling, and secure backend development.Familiarity with monitoring, logging, or metrics tools.
Role overview Faire is seeking a Staff Backend Engineer to join the Discovery Experience team in San Francisco, CA. The focus of this position is on Search FX, where the goal is to improve search features so users can find what they need quickly and enjoy a seamless experience across the platform. What you will do Enhance and fine-tune backend search systems to provide relevant and rapid results. Collaborate with engineers, designers, and product managers to shape how users discover products. Apply technical expertise to build reliable and scalable solutions for search functionality. Collaboration This role involves frequent interaction with cross-functional teams. Sharing ideas, reviewing technical solutions, and helping guide the technical direction are all part of the work as the platform continues to grow.
airapps
airapps is hiring a Mobile DevOps Engineer in San Francisco. This role centers on improving how mobile applications are built, tested, and delivered. Role overview The Mobile DevOps Engineer will focus on refining and maintaining development and deployment workflows for mobile apps. Working alongside teams from different disciplines, this position supports continuous integration and continuous delivery (CI/CD) pipelines to keep releases running smoothly and efficiently. What you will do Streamline mobile application development and deployment processes Collaborate with cross-functional teams to improve automation Enhance and maintain CI/CD pipelines for mobile projects Requirements Experience with mobile application DevOps practices Interest in automation and workflow optimization Ability to work closely with diverse technical teams
Leverdemo-8
Join our innovative team at Lever, where we are revolutionizing the hiring software landscape. As a DevOps Engineer, you will work on cutting-edge technologies that power recruitment for leading companies like Netflix, Shopify, and Spotify. This position plays a crucial role in our mission to streamline and enhance the recruitment process.Lever was founded to address the critical challenge companies face in attracting and hiring top talent. Our platform is recognized as a leader in the industry, and we pride ourselves on our people-first culture. Being named the #1 place to work in San Francisco and a top workplace nationwide is a testament to our commitment to our employees, whom we affectionately call 'Leveroos.'
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Browse all companies, explore by city & role, or SEO search pages. View directory listings: all jobs, search results, or location & role pages.
