Software Engineer (Staff-Level) ChestnutSoftware Engineer (Staff-Level)San Francisco, CaliforniaBacked by a16z, we’re replacing legacy systems with a modern, flexible platform that helps carriers automate complex workflows, optimize every distribution dollar, and unlock new growth. That means well-structured data models, real-time event pipelines, clean APIs, and usable tools that support humans and agents working in parallel.
Software Engineer, New Grad PylonSoftware Engineer, New GradSan Francisco, California$150,000–$180,000 / yearUnlike platforms built before the AI era, Pylon enriches every interaction with deep account-level context, automates the low impact customer work, and surfaces answers before your team even has to ask. For leaders scaling AI-native support teams, Pylon lets humans and agents collaborate on customer work – investigating, resolving, and acting on every signal across every channel that matters.
Software Engineer - Enterprise Platform BaseTenSoftware Engineer - Enterprise PlatformSan Francisco, CAEnterprise engineering authors the core building blocks, APIs, and user experiences powering the Baseten platform: identity and access management, billing, regional isolation, and self-hosted and single-tenant deployment options. Experience building enterprise software, including work on one or more of: identity and access management, billing systems, multi-tenant isolation controls, private connectivity, or compliance program initiatives.
Senior Software Engineer EliseAISenior Software EngineerSan Francisco, California$240,000–$300,000 / yearYou’ll work on a small team with other top Engineers, and you'll take on significant ownership, lead projects, and see your ideas come to life - you’ll essentially operate like a small startup within a startup. As a Software Engineer at EliseAI, you won't just write code; you'll build software that improves business operations and makes a real impact on people's lives.
Software Engineer - Training Product BaseTenSoftware Engineer - Training ProductSan Francisco, CAMultinode training: Multinode training enables customers to easily run training jobs across multiple compute nodes, enabling users to train large models like GLM 4.7 and DeepSeek. Familiarity or experience with the open source training stack and frameworks (NCCL, PyTorch, Megatron, NemoRL, VeRL, Axolotl, HF Trainer) and distributed training techniques (FSDP, DeepSpeed).
Senior Software Engineer, Mobile (iOS & Android) Abby CareSenior Software Engineer, Mobile (iOS & Android)San Francisco, CaliforniaDriven to Redefine What’s Possible We are here to make healthcare better, which means asking hard questions, challenging outdated systems, and finding smarter, more compassionate ways to deliver care. You will ensure the app works reliably in low-connectivity environments through offline-first and degraded-mode patterns (e.g., caching, sync, retries, conflict handling) and careful performance tuning.
Software Engineer- Model Performance Systems BaseTenSoftware Engineer- Model Performance SystemsSan Francisco, CABy uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. You will not just be building the automated "speedometer and diagnostic" suite for our next-generation AI infrastructure; you will be defining the roadmap, driving key technical decisions, and taking full ownership of the future of this work.
Staff Software Engineer - Platform/Infrastructure Hyperbolic LabsStaff Software Engineer - Platform/InfrastructureSan Francisco, CaliforniaIn this role, you'll design the tenant management system, build resource lifecycle APIs, implement identity and access control, establish billing and quota frameworks, and create the multi-cloud abstractions that make our platform feel native regardless of the underlying provider. Deep experience building backend services in Go, including API servers, controllers/operators, resource lifecycle management systems, and distributed control plane components.
Staff+ Software Engineer, Enterprise Knowledge Work AnthropicStaff+ Software Engineer, Enterprise Knowledge WorkSan Francisco, CAThis research continues many of the directions our team worked on prior to Anthropic, including: GPT-3, Circuit-Based Interpretability, Multimodal Neurons, Scaling Laws, AI & Compute, Concrete Problems in AI Safety, and Learning from Human Preferences. We're building toward something bigger: people and agents working together on every core work objective, from first idea to finished product, and the recurring work of a team running with Claude in the loop instead of a person pushing every step.
Software Engineer - GPU Networking & Distributed Systems BaseTenSoftware Engineer - GPU Networking & Distributed SystemsSan Francisco, CADeep-Dive into Hardware: You will characterize and validate networking performance on bleeding-edge clusters (H100/H200, B200/B300, GB200/300 NVL72), writing the acceptance tests that ensure our hardware delivers peak achievable throughput and minimal latency. Optimize Distributed Inference: You will implement and tune the networking layers necessary for efficient Disaggregated KV Cache Offload and WideEP, ensuring seamless communication across NVLink and InfiniBand for our MoE models.
Senior Software Engineer - Fleet Engineering LambdaSenior Software Engineer - Fleet EngineeringSan Francisco, CaliforniaOur investors notably include TWG Global, US Innovative Technology Fund (USIT), Andra Capital, SGW, Andrej Karpathy, ARK Invest, Fincadia Advisors, G Squared, In-Q-Tel (IQT), KHK & Partners, NVIDIA, Pegatron, Supermicro, Wistron, Wiwynn, Gradient Ventures, Mercato Partners, SVB, 1517, and Crescent Cove. Depending on the team you join, your day-to-day will involve some combination of the following: Develop and Maintain Production Systems: Design, implement, and improve the software that powers fleet lifecycle management, machine configuration, and cluster state at scale.
Senior Software Engineer, Backend Harvey, Inc.Senior Software Engineer, BackendSan Francisco, CA$193,400–$290,000 / yearWe are looking for individuals who have worked across the stack on incredible products across consumer, enterprise, and various industries and who are excited about building the future of application layer and genAI products. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we're reshaping how critical knowledge work gets done for decades to come.
Senior Software Engineer, Cloud DittoSenior Software Engineer, CloudSan Francisco, CaliforniaWith more than $145 million in funding and trusted by organizations like Chick-fil-A, Delta Airlines, and the U.S. military, Ditto powers mission-critical experiences across aviation, retail, travel, hospitality, defense, and more. As a globally distributed, fast-growing startup, we’re committed to building a diverse and inclusive team that reflects the wide range of perspectives needed to solve the world’s hardest connectivity problems.
Fullstack Software Engineer, Agent Platform MercorFullstack Software Engineer, Agent PlatformSan Francisco, CaliforniaAs a Full Stack Software Engineer on the Agent Platform team, you'll own these journeys end-to-end: the React frontend people interact with and the backend services that orchestrate agents, data, and integrations. This is a role for someone who cares equally about engineering craft and product impact: shipping scalable, reliable systems and intuitive interfaces that make everyone who touches the platform faster and more effective.
Software Engineer, Applied AI MercorSoftware Engineer, Applied AISan Francisco, CaliforniaYou’ll own projects end-to-end: spanning requirements gathering, creating data creation pipelines, and improving model-adjacent infrastructure, while partnering closely with frontier AI labs and Mercor’s internal teams to ship high-impact applied AI solutions. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.
Senior Fullstack Software Engineer LiveRampSenior Fullstack Software EngineerSan Francisco, CaliforniaHundreds of global innovators, from iconic consumer brands and tech giants to banks, retailers, and healthcare leaders turn to LiveRamp to build enduring brand and business value by deepening customer engagement and loyalty, activating new partnerships, and maximizing the value of their first-party data while staying on the forefront of rapidly evolving compliance and privacy requirements. LiveRamp offers complete flexibility to collaborate wherever data lives to support the widest range of data collaboration use cases—within organizations, between brands, and across its premier global network of top-quality partners.
Senior Software Engineer, Air AI CommureSenior Software Engineer, Air AIMountain View, CaliforniaYou'll work across documentation that transcribes patient visits and structures them into clinical notes in real-time, a conversational clinical assistant grounded in live patient context and medical literature, and an extensible AI Skills Library of reusable agents and workflows that automates clinical tasks across the platform. Our platform spans the full care journey: Ambient AI and Dictation eliminating documentation burden at the point of care, intelligent Agents automating patient and revenue workflows, and autonomous RCM processing billions in claims, all on a single AI-native platform integrated with 60+ EHRs.
Software Engineer JuiceboxSoftware EngineerSan Francisco, CaliforniaAs a software engineer you’ll play a key role in engineering decisions, working closely with the founders and focus on questions like: How can we optimize the ranking of our profile results?. We are on the path to $100M in ARR with 20%+ monthly growth , powering thousands of searches every day and making Juicebox one of the fastest-growing AI SaaS companies in the world.
Software Engineer - Continuous Delivery BaseTenSoftware Engineer - Continuous DeliverySan Francisco, CABy uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. You will own the deployment platform, release pipelines, and rollout safety mechanisms that allow engineers across Baseten to deploy changes rapidly while minimizing operational risk.
Staff Software Engineer - Fullstack Sigma ComputingStaff Software Engineer - FullstackSan Francisco, CA$240,000–$270,000 / yearThe round was led by Princeville Capital, with new strategic investors Databricks Ventures, ServiceNow Ventures, and Workday Ventures participating alongside returning investors Altimeter Capital, Avenir Growth Capital, D1 Capital Partners, K5 Global, NewView Capital, Spark Capital, Sutter Hill Ventures, and XN. This milestone follows Sigma reaching $200M in annual recurring revenue in April 2026, with more than 100% year-over-year growth and 1.1 million new active users added in the latest fiscal year.