Senior AI Applications Engineer

Join ema as a Senior AI Applications Engineer and play a pivotal role in developing cutting-edge AI solutions. You will collaborate with cross-functional teams to design, implement, and optimize AI applications that address real-world challenges. Bring your expertise in machine learning and software development to help us drive innovation and enhance user experiences.

Join Plaid as a Senior Software Engineer specializing in AI Applications, where you'll be at the forefront of technology, working on innovative solutions that redefine how businesses connect with financial services. In this role, you will design, develop, and deploy cutting-edge AI applications that enhance user experiences and streamline operations.

Join Lightning AI as a Senior Application Security Engineer specializing in the realms of Artificial Intelligence and Machine Learning. In this pivotal role, you'll be responsible for enhancing our application security posture across our innovative platforms. Collaborate with a team of talented engineers to identify vulnerabilities, implement security best practices, and ensure our AI-driven solutions remain robust and secure.

About Notion:Notion is at the forefront of transforming how teams collaborate and achieve their goals. We empower individuals and organizations to create beautiful tools that streamline their workflows. In a world filled with countless applications and distractions, Notion serves as a centralized hub, seamlessly integrating documents, notes, projects, calendars, and emails, all enhanced by AI to optimize productivity and automate tasks. Our platform is trusted by millions, including industry giants like Toyota, Figma, and OpenAI, who appreciate Notion's flexibility and efficiency in saving time and resources.Collaboration in person is vital to our culture at Notion. Therefore, we require all team members to work from our offices on Mondays, Tuesdays, and Thursdays—our designated Anchor Days. Depending on the team and role, additional in-office days may be necessary.The Role:We are seeking a talented AI Applications Engineer to spearhead Notion's business transformation initiatives. In this critical role, you will collaborate with key internal stakeholders, particularly in our Go-To-Market, Finance, and People teams, to conceptualize, validate, and implement innovative AI-driven solutions that address complex challenges and deliver significant business outcomes.Your Key Achievements Will Include:Identifying opportunities from ambiguous challenges and translating them into actionable proofs-of-concept in partnership with stakeholders.Designing and prototyping comprehensive AI solutions, from problem definition to data preparation, modeling, evaluation, and initial productization.Developing reusable components, tools, and templates to streamline future projects and enhance efficiency.

Join Distyl AI as a Frontend Product EngineerAt Distyl AI, we are at the forefront of applied artificial intelligence, collaborating with leading institutions to revolutionize operations for the AI age. Our clientele includes top-tier companies across telecom, healthcare, insurance, manufacturing, consumer goods, and global social organizations.We specialize in researching and deploying cutting-edge technologies that facilitate AI-native operations for both our partners and our internal teams. Our innovative work covers areas such as self-constructing systems, reliable AI execution, and transformative products that enhance critical workflows. The impact of our technologies resonates across vast operations, influencing hundreds of millions of consumer interactions and millions of patient journeys.Distyl AI is supported by prestigious investors including Lightspeed Venture Partners, Khosla Ventures, and Coatue, achieving a 100% success rate in production deployment for our customers while maintaining profitability as one of the few sustainable enterprise AI companies.Key ResponsibilitiesDesign and develop user interfaces that empower operators to interact with AI systems for operational tasks, including knowledge capture tools and workflow orchestration applications.Engage collaboratively with AI strategists and domain experts to comprehend real-world workflows.Convert these workflows into effective product experiences that facilitate operator engagement with AI systems.Rapidly iterate from concept to prototype to production, ensuring swift delivery of impactful solutions.

Join Our Mission at Hayden AIAt Hayden AI, we strive to leverage cutting-edge computer vision technology to revolutionize how transit systems and government agencies tackle real-world challenges.Our innovative mobile perception system is designed to enhance transit efficiency, improve street safety, and foster a sustainable future through various applications, including bus lane enforcement and transportation optimization technologies.Your RoleAs a pivotal member of the Hayden Software Engineering team, you will help develop our next-generation Automated Bus Lane Enforcement product. You will be engaged in creating, integrating, and deploying edge-based perception models.This position is centered around C++ software engineering. You will be responsible for delivering high-quality, modern C++ (C++17/20) code that operates on embedded Linux edge devices, primarily utilizing the NVIDIA Embedded Platform.Your work will involve building and optimizing real-time CV/ML pipelines on-device, incorporating CUDA/TensorRT and efficient camera/video input/output.You will collaborate closely with Product Management to translate customer requirements into effective software solutions.Being part of a startup, you will thrive in a fast-paced, dynamic environment with evolving challenges.As we expand, your contributions will help establish a robust foundation through well-designed and thoroughly tested code that can be shared across the organization.

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/

Why Join Brex?Brex is an innovative AI-driven spend management platform designed to empower businesses to manage expenses with confidence. We provide integrated corporate cards, banking solutions, and global payment options, alongside intuitive software for travel and expense management. From startups to large enterprises, clients like DoorDash, Flexport, and Compass leverage Brex to optimize spending, lower costs, and enhance efficiency worldwide.Joining Brex means embracing challenges, pushing boundaries, and collaborating with industry leaders. We are dedicated to fostering a diverse and inclusive culture where your potential is only limited by your aspirations. We equip you with the necessary tools, resources, and support to advance your career.Engineering at BrexOur engineering culture focuses on building scalable systems with intention and speed. Our teams, spanning Software, Data, Security, and IT, work with high autonomy and deep collaboration. We confront challenging technical problems, take ownership of outcomes, and strive for excellence across all levels—from architecture to deployment. Here, engineering is regarded as a craft, and builders evolve into leaders.Your RoleAs a Senior Application Security Engineer, you will be pivotal in identifying and addressing security vulnerabilities within the Brex platform. Your responsibilities will include conducting code and design reviews, penetration testing, and managing vulnerabilities. You will also develop and maintain tools for static and dynamic testing of the platform, ensuring secure developer workflows. You will collaborate closely with teams across Security Operations, GRC, Product Security, Front End Platform, and IT Infrastructure.We seek individuals with a robust background in penetration testing and a proven track record of uncovering vulnerabilities in complex systems. Your ability to craft exploits that highlight business risk will be essential. This role demands a collaborative spirit, as you will engage with various engineering teams throughout Brex. Your enthusiasm for diverse perspectives and needs is crucial as we build world-class financial services with top-tier security.Brex is at the forefront of AI-driven financial services for dynamic companies such as Coinbase, Robinhood, and Anthropic. As we integrate AI across our product suite, this role will have the chance to significantly influence our approach.

Join Our Team as a Senior Applications EngineerLocation: San Francisco, CA (full-time, in-person)Company OverviewAt Cosmic Robotics, we are dedicated to transforming the construction of essential infrastructure on Earth while innovating technologies that will empower humanity to construct beyond our planet. Our flagship technology, Cosmic-1, revolutionizes solar panel installation, achieving speeds ten times faster than current methodologies, aiding our transition to a sustainable energy future and setting the stage for autonomous construction.The RoleAs a Senior Applications Engineer, you will serve as the vital link between our state-of-the-art robotics and our clientele. You will oversee the complete deployment cycle and ensure the long-term success of our robots in real-world applications. Collaborating closely with customers, you will be instrumental in developing, deploying, and optimizing the world’s leading construction robots. Your role is essential in enhancing our platform through customer-driven feature development and fostering widespread adoption. As a pivotal member of our team, you will contribute to defining the future of autonomous construction.This position offers a unique chance to:Tackle significant challenges that will shape the future of infrastructure and energy.Collaborate with an exceptional team hailing from NASA, SpaceX, Google, Built Robotics, and other industry leaders.Accelerate your personal growth and leadership capabilities within a rapidly expanding company.ResponsibilitiesManage the entire lifecycle of robot deployment at customer locations, encompassing initial setup, commissioning, field validation, and ongoing maintenance.Act as a technical partner to customers, converting their operational requirements into actionable features for our robots and platform.Design, integrate, and launch new features tailored to meet specific customer needs.Diagnose and resolve field issues while ensuring maximum robot uptime.Establish project milestones, strategize roadmaps, and meet ambitious timelines for deployments and feature enhancements.Recruit, nurture, and cultivate a world-class engineering team.

Stuut is revolutionizing the accounts receivable landscape for B2B enterprises by streamlining collections processes that have traditionally been cumbersome and expensive. Our innovative platform is rapidly being adopted by finance teams across various industries including industrials, chemicals, and manufacturing, serving clients from Fortune 10 corporations to rapidly growing midmarket companies. We are proudly supported by leading investors such as a16z, Khosla Ventures, Activant, 1984 Ventures, and Page One.The RoleTelephony serves as a vital communication channel in accounts receivable management. Customers reach out via phone, agents initiate calls, and transfers must function seamlessly. We are developing AI-driven agents that perform crucial tasks in collections, cash application, disputes, and customer communication, with telephony being at the heart of these operations.We are on the lookout for a Senior Telephony Engineer to establish the groundwork for AI-enabled voice applications at Stuut. Collaborating closely with our engineering, product, and go-to-market teams, you will design and manage the telephony infrastructure that supports scalable production phone interactions. This position merges telephony infrastructure, real-time voice systems, AI voice agents, and finance workflows.The ideal candidate will possess extensive expertise in telephony, the ability to build robust distributed systems that perform well under production demands, and an understanding of how infrastructure choices influence product outcomes. You will be responsible for the systems that dictate call connections, successful transfers, and business performance metrics. As the first dedicated voice infrastructure hire at Stuut, you will play a pivotal role in defining our approach.What You’ll DoDesign, build, and manage telephony services overseeing phone numbers, SIP trunks, carrier integrations, and call routing at scale.Develop resilient signaling and media systems that integrate traditional telephony with real-time voice infrastructure and AI workflows.Enhance core voice workflows including outbound calling, inbound routing, warm transfers, voicemail management, DTMF interactions, and human transitions.Collaborate closely with speech and AI systems on STT, TTS, turn-taking, interruption management, and agent orchestration.Optimize call quality, reduce latency, ensure reliability, and improve debug capabilities across the voice stack.Develop internal APIs and platform primitives to make voice functionalities available to product and engineering teams.Monitor voice workflows to measure critical business outcomes such as answer rates, transfer success, voicemail results, and resolution rates.

Jordan Park is dedicated to providing exceptional investment management and financial guidance to a unique community of individuals, families, and institutions. Our clients have significantly impacted business, philanthropy, government, and society. Our team consists of compassionate problem solvers with diverse experiences. We tackle complexity and overcome challenges to empower our clients in reaching their ideal outcomes.Our mission is to enrich lives and legacies.Senior Associate, Software Engineer – Data Platform & AI ApplicationsSan Francisco, California The Opportunity We are looking for a Senior Associate to contribute to the development and expansion of our enterprise data platform and AI application ecosystem.This position merges advanced data engineering, cloud infrastructure, DevOps practices, and applied AI development. As a senior individual contributor, you will own significant platform components and work closely with leadership and business teams, providing a hands-on technical presence with substantial scope and influence.Your responsibilities will include enabling trustworthy analytics firm-wide, integrating proprietary data into AI systems, automating operational workflows, and crafting customized applications and tools.

About Us: At Ema, we are pioneering the development of the world’s largest agentic AI platform. Our mission is to revolutionize workforce productivity, aiming to amplify enterprise efficiency by enabling organizations to create and implement their own AI-driven employees. We are supported by prominent investors such as Accel, Prosus, SCB10X, Hitachi Ventures, and Sozo Ventures, having successfully raised over $60M to date. Our founders, Surojit Chatterjee and Souvik Sen, possess extensive expertise in product development and scaling from their experiences at renowned companies like Google, Coinbase, Flipkart, and Okta.As an AI Application Engineer, you will tackle cutting-edge GenAI challenges for Fortune 500 companies, developing Agentic AI applications tailored to meet customer needs. Your role will encompass analyzing customer requirements, creating innovative AI applications, integrating with existing customer data and systems, and leading the deployment of GenAI applications at an enterprise scale.Key Responsibilities:Design and customize Agentic AI applications for Fortune 500 clients.Align GenAI solutions with client objectives and business strategies.Oversee the deployment of GenAI applications on a large scale.Analyze customer data structures and facilitate integration with existing systems.Implement APIs and integration protocols for seamless connectivity.Assess and enhance AI model performance.Detect data patterns to troubleshoot issues and suggest improvements.Collaborate with cross-functional teams, including engineering, product, and customer success.Work directly with enterprise clients to understand their needs and provide technical guidance.Qualifications:Bachelor's degree in Computer Science, Information Technology, or a related field.3+ years of experience as an AI/ML Engineer or in a similar role.Strong foundational knowledge of traditional machine learning and Generative AI concepts.Proficiency in programming languages such as Python or Java.Experience with AI frameworks and libraries (e.g., TensorFlow, PyTorch).Excellent problem-solving skills and the ability to analyze complex data sets.Strong communication skills for effective collaboration with clients and colleagues.

Join Retell AIAt Retell AI, we leverage first principles to revolutionize the call center experience through innovative voice AI technology.In just 18 months since our launch, our AI voice agents have been adopted by thousands of companies to manage sales, support, and logistics calls, significantly reducing the need for large teams of human agents. Supported by Y Combinator, Alt Capital, and other notable investors, we've achieved impressive growth, scaling from $5M to $36M ARR with a dedicated team of 20.Looking ahead to 2026, we aim to create a comprehensive AI-powered Customer Experience (CX) platform that transforms entire contact centers. Instead of simple automation requiring ongoing human oversight, we are developing intelligent AI "workers" that serve as frontline agents, QA analysts, and managers — perpetually executing, monitoring, and enhancing customer interactions.We're experiencing rapid growth and are on the lookout for passionate innovators eager to tackle complex technical challenges, accelerate progress, and make a significant impact at one of the leading voice AI startups.Let’s build the future together.Ranked in the top 50 AI applications by a16z: https://tinyurl.com/5853dt2x#4 on Brex's Fast-Growing Software Vendors list for 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on: https://leanaileaderboard.com/

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.

Join the Innovative Team at Resolve AIAt Resolve AI, we are revolutionizing the way software maintenance and production troubleshooting are approached. Our mission is to develop a groundbreaking, fully autonomous AI Production Engineer that can autonomously identify and resolve intricate system challenges from start to finish.Founded by industry pioneers Spiros Xanthos and Mayank Agarwal, who were instrumental in creating OpenTelemetry and steering Splunk Observability, our team has a proven track record with two successful exits to Splunk and VMware.With over $150M raised from prestigious investors such as Lightspeed, Greylock, Unusual Ventures, and renowned backers like Jeff Dean (Chief Scientist, Google DeepMind), Thomas Dohmke (CEO, GitHub), Matt Garman (CEO, AWS), Reid Hoffman (Founder, LinkedIn), and Fei-Fei Li (Professor, Stanford), our journey is just beginning.If you're enthusiastic about our mission but don't see a current position that aligns with your skills, we encourage you to apply here. We may have future opportunities that would be a perfect fit!

Join Affinity as a Senior AI Engineer and contribute to our cutting-edge AI platform. We are seeking a talented engineer passionate about artificial intelligence and its applications in real-world scenarios. In this role, you will collaborate with cross-functional teams to design, develop, and enhance AI solutions that drive our business forward.

Join the Revolution at Retell AIRetell AI is pioneering the future of call centers through innovative voice AI, driven by first principles thinking.In just 18 months since our inception, we have empowered thousands of businesses with our AI voice agents, transforming how sales, support, and logistics calls are managed—previously requiring extensive human teams. Supported by prestigious investors such as Y Combinator and Alt Capital, we've rapidly scaled from $5M ARR to an impressive $36M ARR with a compact yet dynamic team of 20.Our ambition for 2026 is to create a revolutionary customer experience platform, where entire contact centers are powered by AI. Moving beyond basic automation, we aim to develop intelligent AI “workers” that serve as frontline agents, QA analysts, and managers, continuously enhancing customer interactions without the need for constant human oversight.As we expand, we are seeking passionate engineers who are eager to solve challenging technical problems, act swiftly, and make a significant impact in one of the fastest-growing voice AI startups. Let’s shape the future together.

fractional-ai is looking for a Senior or Staff Software Engineer to join the San Francisco office. This position centers on building advanced AI solutions with a team that values both technical depth and collaboration. Role overview This role focuses on designing and developing AI-driven systems. The work involves solving technical challenges and contributing to projects that push the boundaries of what AI can achieve. Collaboration with other engineers and stakeholders is a key part of daily responsibilities. Who will thrive Experienced engineers with a strong background in software development Those who enjoy working on complex technical problems Individuals who value teamwork and open communication Location This position is based in the San Francisco office.

Join Fieldguide as a Senior AI Engineer, where you will lead innovative projects at the forefront of artificial intelligence. In this pivotal role, you will design, develop, and implement cutting-edge AI solutions that drive our business forward.We are looking for a passionate engineer who thrives in a dynamic environment and is eager to tackle complex challenges. You will collaborate closely with cross-functional teams to ensure the successful integration of AI technologies into our existing systems.

Join Accordion as a Senior AI Engineer, where you'll be at the forefront of innovative AI solutions. In this key role, you will design, develop, and implement advanced artificial intelligence algorithms and models to enhance our product offerings. Collaborate with cross-functional teams to translate complex data into actionable insights, driving the success of our projects.