Staff Software Engineer - AI Engineer

About CartesiaAt Cartesia, our vision is to develop the next wave of artificial intelligence: a seamless, interactive intelligence that is accessible anytime and anywhere. Even the most advanced models today struggle to consistently analyze extensive streams of audio, video, and text—this includes a staggering 1 billion text tokens, 10 billion audio tokens, and 1 trillion video tokens—much less accomplishing this directly on devices.We are at the forefront of designing the model architectures that will revolutionize this capability. Our founding team, who met as PhD students at the Stanford AI Lab, pioneered State Space Models (SSMs), a groundbreaking tool for training efficient, large-scale foundational models. Our diverse team blends in-depth knowledge of model innovation with strong systems engineering and a product-driven engineering approach to create and deploy cutting-edge models and experiences.We are backed by prestigious investors including Index Ventures and Lightspeed Venture Partners, along with contributions from Factory, Conviction, A Star, General Catalyst, SV Angel, Databricks, and many others. We are privileged to have the mentorship of numerous esteemed advisors and over 90 angel investors from various fields, including leading experts in AI.About the RoleWe are seeking an AI-native Software Engineer focused on Developer Acceleration to enhance the developer experience and optimize the speed at which Cartesia engineers can ship solutions. This role involves creating innovative tooling at the cutting edge of AI programming, and developing a comprehensive playbook that empowers both engineers and non-engineers to efficiently deploy consistent and maintainable internal tools independently.Your ImpactDesign workflows that facilitate Cartesia's transition from problem identification to solution implementation with minimal human oversight.Remain informed about the latest advancements in AI-assisted development and champion its adoption within Cartesia.Develop automated end-to-end development and evaluation frameworks that empower coding agents to refine solutions and self-correct.Create a playbook for the Cartesia team to build data-connected, IAM-aware internal tools for both human-in-the-loop and automated processes.

Join Our Innovative TeamAt OpenAI, our Kernels team is at the forefront of developing cutting-edge software that drives our most ambitious AI research initiatives.We operate at the intersection of hardware and software, crafting high-performance kernels and implementing distributed system optimizations to enhance the efficiency of large-scale training and inference processes.Our mission is to empower OpenAI to push the boundaries of AI by ensuring that various models—from large language models (LLMs) to recommendation systems—operate seamlessly on state-of-the-art supercomputing infrastructures. This includes adapting our software stack for new accelerator technologies, optimizing overall system performance, and eliminating bottlenecks throughout the architecture.Your RoleAs a member of the Accelerators team, you will play a crucial role in evaluating and integrating new computing platforms designed to support extensive AI training and inference capabilities.Your projects will encompass everything from prototyping system software on emerging accelerators to implementing performance enhancements across our AI applications.You will engage with both hardware and software components, focusing on kernel development, sharding strategies, distributed systems scalability, and performance modeling.This position emphasizes the integration of machine learning algorithms with system performance optimization—particularly in large-scale environments—rather than solely compiler development.Key ResponsibilitiesPrototype and empower OpenAI's AI software stack on pioneering accelerator platforms.Enhance the performance of large-scale models (LLMs, recommender systems, distributed AI workloads) across varied hardware setups.Design kernels, sharding strategies, and system scaling solutions optimized for new accelerator technologies.Collaborate on code-level optimizations (e.g., in PyTorch) and lower-level enhancements to improve performance on unconventional hardware. Conduct system-level performance modeling, identify bottlenecks, and foster comprehensive optimization.Partner with hardware teams and vendors to assess alternatives to current platforms and adapt our software stack accordingly.Contribute to runtime advancements, compute and communication overlapping, and scaling strategies for next-generation AI workloads.Ideal Candidate ProfileA strong background in software engineering, particularly with a focus on system performance and large-scale applications.Experience with AI workloads and optimizing performance across both hardware and software layers.Familiarity with distributed systems and the ability to work collaboratively with hardware teams.A passion for advancing AI technologies and a desire to tackle challenging problems in a fast-paced environment.

Join Perplexity as a Software Engineer on our innovative Acceleration team! We are at the forefront of transforming how individuals navigate the internet and the world around them. Our goal is to enhance the operational efficiency of our teams and achieve significant advancements in both product and user experience.As we lead the way into an agentic future for the internet, you will play a crucial role in leveraging AI tools and agents to amplify the capabilities of our focused, mission-driven teams. Currently, AI is integrated into every aspect of our work, from frontend and backend engineering to applied AI research and business operations. The Acceleration team is dedicated to pioneering software and process engineering to maximize the benefits of AI technology, ensuring we deliver at unparalleled speeds.We are looking for candidates with exceptional technical judgment developed through experience in internet-scale companies, who actively engage with cutting-edge AI tools and possess a visionary mindset to redefine work processes for future-leading organizations. You will thrive in a versatile role that combines AI product development, infrastructure/platform engineering, developer experience, and more.

Join Prima Mente: A Leader in Biology AIAt Prima Mente, we are redefining the frontier of biology through artificial intelligence. Our mission is to generate unique datasets, develop versatile biological foundation models, and translate groundbreaking discoveries into impactful research and clinical outcomes. With a commitment to understanding the complexities of the brain, we aim to shield it from neurological diseases while enhancing overall health. Our diverse team of AI researchers, experimentalists, clinicians, and operational experts operates across London, San Francisco, and Dubai.Role Overview: GPU/CPU-Accelerated BioinformaticsWe are seeking a skilled Bioinformatics Software Engineer to architect and implement scalable production pipelines for processing multi-omics data. The successful candidate will enable rapid transitions from hypothesis to patent-ready solutions in a matter of months.Key Responsibilities:Design and implement bioinformatics pipelines optimized for GPU/CPU utilization utilizing tools like Flyte and Nextflow, capable of processing over 1,000 samples at scale.Optimize performance and cost efficiency by leveraging GPU/CPU acceleration where it provides the greatest benefit.Collaborate with experimental and machine learning teams to validate computational results and align processing with model requirements.Foster and manage collaborations with academic and industrial research partners.Growth Expectations1 Month: You will be deploying your workflows on GPU/CPU-accelerated cloud infrastructure to process multi-omic experiments, while building relationships with AI/ML and wet lab teams to understand their requirements.3 Months: Your optimized pipelines will be processing thousands of samples with substantial speed enhancements and reduced costs, yielding publication and patent-ready outcomes.6 Months: Your automated pipelines will support daily AI model training, and you will co-design experiments alongside AI/ML engineers, leading technical execution on external collaborations.Your ProfileYou are passionate about pushing the boundaries of AI and biology. As an engineer rather than an analyst, you thrive on enhancing performance and efficiency while architecting robust systems. You are comfortable making rapid technical decisions and iterate quickly.Desired QualificationsExperience in bioinformatics, computational biology, or a related field.Proficiency in software engineering, particularly in developing scalable data processing pipelines.Strong understanding of multi-omics data and methods.Familiarity with GPU/CPU acceleration techniques.Excellent communication and collaboration skills.

At Thinking Machines Lab, our mission is to empower humanity by advancing collaborative general intelligence. We aspire to create a future where everyone can access the knowledge and tools necessary to harness AI for their individual needs and aspirations.Our team consists of scientists, engineers, and innovators who have developed some of the most renowned AI products, including ChatGPT and Character.ai, as well as open-weight models such as Mistral. We are also contributors to popular open-source initiatives like PyTorch, OpenAI Gym, Fairseq, and Segment Anything.About the RoleWe are seeking talented engineers to develop the libraries and tools that will expedite research at Thinking Machines. You will take charge of our internal infrastructure, which includes evaluation libraries, reinforcement learning training libraries, and experiment tracking platforms, all aimed at enhancing research velocity over time.This position emphasizes collaboration; you will engage directly with researchers to pinpoint bottlenecks and challenges. Your success will be measured by the trust researchers place in your systems and their enjoyment of using them.What You'll DoDesign, develop, and manage research infrastructure, including evaluation frameworks, RL training systems, experiment tracking platforms, visualization tools, and shared utilities.Create high-throughput, scalable pipelines for distributed evaluation, reward modeling, and multimodal assessments.Establish systems for reproducibility, traceability, and stringent quality control throughout research experiments and model training processes. Implement monitoring and observability.Collaborate closely with researchers to identify obstacles and unlock new capabilities. Manage research tools like a product manager, actively seeking feedback and tracking user adoption.Work alongside infrastructure, data, and product teams to ensure seamless integration of tools across the technical stack.

About the Role OpenAI is hiring a Software Engineer for the Engineering Acceleration team, working on Consumer Devices in San Francisco. This team builds and improves products that shape how people use technology in daily life. The role involves developing new features and strengthening existing systems for consumer-facing devices.

About Our TeamJoin our innovative Applied AI team at OpenAI, where we responsibly deploy cutting-edge technology for global impact. We are the creators behind transformative products like ChatGPT, Plugins, DALL·E, and the APIs for GPT-4, GPT-3, embeddings, and fine-tuning. Our team also manages large-scale inference infrastructure, with exciting developments on the horizon.We are dedicated to learning from real-world deployments to maximize AI benefits while ensuring its responsible use. Prioritizing safety over unchecked growth, we directly engage with end-users through ChatGPT and empower developers via our APIs, enabling unprecedented product features.About the PositionAs a pivotal member of our Engineering Acceleration team, you will design, build, and maintain the essential systems that drive the development of ChatGPT and our APIs. This growing team offers you the opportunity to shape the strategy and vision that enhances developer productivity.Key Responsibilities:Lead the creation and implementation of tools and processes that boost engineering efficiency, minimize manual tasks, and enhance output quality.Leverage our advanced AI tools to redefine productivity standards within our engineering teams.Collaborate with internal teams to identify their workflows, challenges, and requirements, ensuring our systems effectively address their needs.Deliver innovative features and research capabilities in partnership with product engineers to establish the necessary technical groundwork.Advise engineering teams on best practices for building observable and scalable systems.Maintain responsibility for the reliability of the systems we develop, including participating in an on-call rotation for critical incident response.Ideal Candidate Profile:5+ years of engineering experience, with at least 3 years focused on developing infrastructure tools for developers.Empathetic understanding of the tools and processes that hinder engineering teams, contributing to inefficiencies or burnout.A relentless passion for learning and innovating in a fast-paced environment.

Employee Applicant Privacy NoticeAbout Us:Join us in shaping a brighter financial future. Together with our members, we’re revolutionizing personal finance interactions. As a next-gen financial services company and national bank leveraging innovative, mobile-first technology, we empower millions of members to achieve their goals. In a time of unprecedented industry transformation, we take pride in the impact we make every day, driven by our core values. Invest in yourself, your career, and the future of finance with us.The Opportunity:We are seeking a forward-thinking and entrepreneurial Principal Software Engineer to become a key member of our Builder Tools engineering organization. In this influential role, you will lead the technical strategy and architecture of our next-generation internal developer platform, integrating AI-first practices into the software development life cycle (SDLC). Your contributions will enhance the developer experience by enabling SoFi engineers with AI-driven development tools and methodologies. As a thought leader in the Developer Tooling domain, you'll mentor peers and drive solutions from conception to implementation, fostering organizational change and prioritizing customer success.

Responsibilities:Develop Our Product. Take ownership of software features that enhance our AI platform, empowering private market investors to analyze deals swiftly and accurately. This role requires you to actively engage in coding and delivering essential platform components from the ground up.Ensure Quality and Excellence. Establish and maintain coding standards, architectural guidelines, and review procedures; mentor fellow engineers. Co-cultivate a culture centered on practical, reliable, and test-driven development that swiftly meets business requirements.Scale for Growth. Assist in monitoring and scaling the architecture of our platform and its infrastructure.Collaborate Across Functions. Engage closely with product, security, and go-to-market teams to translate our strategic roadmap into actionable features and deliverables.

About the RoleJoin Saris-AI, an innovative applied AI startup based in San Francisco and Montreal, where we are revolutionizing the banking industry. Our mission is to address a $100 billion annual challenge, growing rapidly each quarter, as we explore the potential of advanced multi-turn AI systems.We focus on automation challenges that require extensive contextual reasoning, tool integration with existing systems, and adherence to compliance requirements—problems that lack straightforward solutions.Our successful deployment of real AI agents managing customer workflows has led to a burgeoning client base, and we are expanding quickly. We seek highly skilled technical professionals who aspire to make a significant impact from the outset.Core Engineering TeamWe are in search of a passionate Software Developer who excels in dynamic and ambiguous settings. You should have experience guiding products from the initial version to large-scale implementation, and a penchant for crafting sustainable, elegant systems.Your Key ResponsibilitiesConceive, develop, test, deploy, maintain, and enhance AI-driven software solutions tailored for the fintech sector.Manage project timelines effectively, prioritizing tasks to deliver exceptional features.Contribute to product and business strategies as a key player, influencing both technical frameworks and overarching goals.Encourage and uphold best practices, including code reviews and testing.Candidate ProfileProven experience in backend/fullstack engineering, particularly within SaaS projects with significant impact.Extensive knowledge of Python (Django, Flask, FastAPI), TypeScript (React), Docker, and cloud platforms (AWS/GCP).Solid track record in designing, constructing, and optimizing distributed systems.Strong foundation in both relational and non-relational databases (PostgreSQL, Redis).Expertise in API design (REST, GraphQL) and deployment practices.Preferred QualificationsExperience building intricate workflow orchestration systems.Familiarity with cloud infrastructure.Background in creating integrations or data pipelines.A passion for mentoring and developing team capabilities.

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 UsXOXO is an innovative research lab dedicated to crafting intelligent interfaces that enhance everyday life. Our stealth team, composed of passionate engineers, designers, and researchers, is focused on solving unique challenges that go beyond the workplace.With recent advancements in infrastructure, architecture, and model layers, we are actively seeking skilled builders to create the application layer that will actualize our visionary concepts.About the RoleWe are on the lookout for a proficient iOS engineer to lead the development of XOXO’s consumer app, featuring a pioneering interface for intelligence. This position calls for a robust engineer capable of managing the entire mobile surface area, from architecture and performance to refining a visually appealing design system that ensures intentional user interactions.A specific background is not mandatory; what truly matters is your passion for ownership: you take charge, work swiftly without compromising quality, and aspire to create a mobile product that redefines craftsmanship and performance standards.What You’ll DoDesign and launch the initial versions of our React Native app, transitioning it from concept to production.Convert a visually rich design system into reusable components, motions, and interaction patterns with seamless performance.Develop new product interfaces that seamlessly integrate modern AI/ML capabilities in a mobile-friendly manner.Enhance app performance, focusing on rendering, startup, memory consumption, battery usage, and perceived speed.Establish high standards for mobile engineering quality (including testing, monitoring, and release management) while collaborating with various teams to ensure successful delivery.

Join Saris AI as a Staff Backend Software Engineer, where you will play a pivotal role in developing innovative solutions that harness the power of artificial intelligence. In this dynamic position, you will collaborate with cross-functional teams, design scalable systems, and contribute to the overall architecture of our backend solutions.

About Retell AIAt Retell AI, we are pioneering the future of call centers through innovative voice AI technology. Our cutting-edge solutions are transforming how companies engage with customers.In just 18 months since our inception, we've empowered thousands of businesses with our AI voice agents that efficiently manage sales, support, and logistics calls, significantly reducing the need for large teams of human agents. Supported by industry-leading investors including Y Combinator and Alt Capital, we've grown our annual recurring revenue from $5M to an impressive $36M while expanding our team from 5 to 20 talented individuals since 2025.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform where entire contact centers are driven by AI. Unlike basic automation requiring constant human oversight, we’re engineering intelligent AI “workers” capable of serving as frontline agents, quality assurance analysts, and managerial roles, all while optimizing customer interactions continuously.We are rapidly expanding and seeking driven builders who thrive on solving complex technical challenges, act decisively, and wish to make a tangible impact in one of the fastest-growing voice AI startups.Join us in shaping the future!Recognized as a top 50 AI application in the a16z list: https://tinyurl.com/5853dt2xRanked #4 in Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025Featured among the top startups on: https://leanaileaderboard.com/

With support from prominent Silicon Valley investors, Peregrine Technologies empowers public safety organizations, state and local governments, federal agencies, and private sector entities to tackle societal challenges with unparalleled speed and precision. Our AI-driven platform transforms isolated and disparate data into actionable intelligence, rapidly presenting critical information that enables improved decision-making and outcomes. Currently, Peregrine serves hundreds of clients across over 30 states and two countries, impacting more than 125 million individuals, as we broaden our reach into enterprise markets and international territories.TeamOur engineering team is deeply committed to the idea that empathy enhances our solutions. Understanding how users interact with our products is fundamental to our approach. Engineers have the unique opportunity to collaborate closely with our onsite team to grasp the diverse use cases that Peregrine addresses.We cherish both ownership and teamwork; you will be fully accountable for significant features while working hand-in-hand with fellow engineers to ensure successful delivery. We believe that humility and empathy are critical for crafting effective solutions, and you will engage directly with our deployment team and users as we refine our offerings to meet their needs. Ingenuity and perseverance are vital in realizing our vision.RoleAs part of our new AI team, you will play a key role in delivering unique value to our clients. This team is responsible for designing powerful and intuitive user experiences powered by generative AI. You will explore entirely new interaction methods for users—whether through natural language commands or by enabling AI agents to manage complex tasks on their behalf. Your contributions will shape impactful AI-driven features that assist customers in solving real-world challenges more efficiently.Your work will encompass a variety of intricate challenges, including scaling our platform to process terabytes of data from multiple sources, efficiently querying and alerting users about this data in real-time, and optimizing search algorithms for swift result delivery.While our technology stack is continuously evolving, it is built on a foundation that includes Python, Django, Celery, Airflow, and Kafka for the backend; React, Redux, and Mapbox for the frontend; PostgreSQL and Elasticsearch for data storage; machine learning models hosted in Bedrock and Sagemaker; and utilizing AWS, Pulumi, Terraform, and Kubernetes for our infrastructure.

Join Our Innovative Team at Retell AIRetell AI is at the forefront of revolutionizing the call center industry through advanced voice AI technology. In just 18 months since our inception, we have empowered thousands of businesses to optimize their sales, support, and logistics calls, which previously relied on large teams of human agents. Supported by prominent investors including Y Combinator and Alt Capital, we've achieved remarkable growth, scaling from $5 million to $36 million in annual recurring revenue (ARR) while expanding our talented team to 20 members.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. Unlike traditional automation that requires ongoing human oversight, we are building intelligent AI "workers" capable of functioning as frontline agents, quality assurance analysts, and managers, constantly enhancing customer interactions.If you are a passionate innovator eager to solve complex technical challenges and make a tangible impact at one of the fastest-growing voice AI startups, we invite you to join us in shaping the future.Ranked among the top 50 AI applications by a16z: a16z List4th on Brex's Fast-Growing Software Vendors of 2025: Brex BenchmarkFeatured as a leading startup on: Leanaileaderboard

Join Stripe as a Forward Deployed AI Accelerator in our dynamic marketing team, where you'll play a pivotal role in leveraging cutting-edge AI technologies to drive marketing strategies. This position involves close collaboration with various teams to enhance product offerings and optimize marketing campaigns using advanced AI solutions.

About UsAt XOXO AI, we are at the forefront of innovation, creating intelligent interfaces that enhance everyday life. Our team, comprised of dedicated engineers, designers, and researchers, is committed to solving unique challenges that extend beyond the workplace.With recent advancements in infrastructure, architecture, and machine learning models, we are expanding our team to include skilled builders who will help bring our vision to fruition through the development of our application layer.About the RoleWe are seeking a highly skilled Android engineer to spearhead the development of XOXO's consumer application, which features a revolutionary interface for intelligence. This position is tailored for a proactive engineer who will manage the entire mobile ecosystem, focusing on architecture, performance, refinement, and a visually captivating design system that ensures intentional user interactions.Your background is less important than your passion and drive: a commitment to high ownership, an ability to work swiftly without compromising quality, and a desire to create a mobile product that redefines excellence in craftsmanship and performance.What You’ll DoDesign and launch initial versions of our React Native application, advancing it from prototype to production.Convert a sophisticated visual design system into reusable components, animations, and interaction patterns, ensuring seamless performance.Develop new product interfaces that integrate cutting-edge AI/ML capabilities in a manner that feels intuitive on mobile devices.Enhance application performance across various dimensions: rendering, start-up speed, memory usage, battery consumption, networking, and user-perceived speed.Establish high standards for mobile engineering quality, including testing, instrumentation, and release management, collaborating closely across the tech stack to deliver end-to-end solutions.

Join Us in Combating the Escalating Wildfire Crisis with Cutting-Edge AI and IoT SolutionsAbout UsThe Challenge: In the face of climate change, wildfires are becoming more frequent and severe. Traditional methods of fire detection, reliant on bystanders and emergency calls, lead to critical delays in response times. Fire authorities require innovative solutions for faster detection, verification, and response to avert catastrophic fire outbreaks.Who We Are: Pano AI is a dynamic growth-stage startup based in San Francisco, comprising over 150 passionate professionals. We stand at the forefront of wildfire detection and intelligence, equipping fire services with timely information and advanced technology to enhance their response capabilities. Our platform integrates cutting-edge hardware, software, and AI, utilizing ultra-high-definition 360-degree cameras positioned strategically to provide real-time threat assessments. Our technology empowers fire professionals with actionable insights, enabling them to prevent minor flare-ups from escalating into significant disasters.Recognized by TIME as one of the 100 Most Influential Companies of 2025, and featured in MIT Technology Review's top 15 climate tech companies to watch, Pano AI is paving the way for innovative solutions in fire response. Our contributions have been recognized in major publications such as the Wall Street Journal and Bloomberg.