AI Startup Jobs

Parloa

As a Founder's Associate Intern, you will tackle strategic challenges that lack defined ownership and drive them to tangible results quickly. You will collaborate directly with our Chief of Staff and the CEO Office team, taking on cross-functional projects where the business needs the most support. This role is designed for individuals who excel in ambiguous environments, thrive on high visibility, and operate with a strong sense of ownership.

Salary not listed

The Developer Experience team at Moveworks builds platforms that empower developers working on the Moveworks Agentic AI platform. This role is central to owning the technical foundation for the team's output, focusing on designing and building complex platform challenges related to generality, scalability, and extensibility, all while prioritizing the developer experience. The ideal candidate thinks in systems, ships impactful solutions, and effectively collaborates with and influences others.

$191k - $334k

Knowtex is seeking an ML Engineer / Researcher focused on Large Language Models to contribute to the next generation of their AI stack. This role involves developing and optimizing models for clinical documentation and structured clinical reasoning, aiming to enhance quality, cost, latency, and control. The position is research-heavy with a direct path to production, requiring the design of experiments, building datasets and evaluation systems, and fine-tuning and post-training models. The successful candidate will collaborate closely with engineering and clinical teams to deploy solutions at scale and will play a key role in shaping Knowtex's long-term LLM strategy.

Salary not listed

Percepta

Percepta is seeking an AI Infrastructure Engineer to take ownership of the infrastructure, deployment, and operational reliability for Percepta's AI systems, including autonomous agents. This role involves hardening existing infrastructure, strengthening deployment pipelines, and defining new SRE practices for operating autonomous systems. You will be instrumental in bridging the gap between AI research and production, contributing to the foundational decisions that shape the future of agentic infrastructure.

$180k - $400k

Usul

Usul is a Silicon Valley AI lab dedicated to rebuilding the infrastructure that equips the Western world, enabling faster technology procurement for the US and its allies. We are seeking a full stack engineer to work on both our government-facing data and workflows platform, and our commercial platform that assists defense companies and startups in winning government contracts. This role involves building intuitive user interfaces and contributing to mission-critical national security solutions.

$160k - $240k

Blissway

Blissway is a startup focused on simplifying toll collection and improving highway safety through deep tech, AI/ML, hardware, SaaS, and IoT. We have established a significant technological lead in the global tolling industry and operate with a lean, growing team. This role is for an engineer who is passionate about taking machine learning models from development to reliable production environments. You will be responsible for the infrastructure, deployment, and monitoring that ensures models are accurate and performant in real-world applications, processing millions of images daily.

$150k - $195k

Code Metal

Code Metal is seeking a Staff AI Platform Engineer to architect and build the foundational AI enablement stack that internal engineering teams rely on. This role involves designing and operating production systems for GPU inference serving, model gateways, agent harnesses, context management, and observability. While primarily an engineering role focused on building and operating production systems, it also requires solid data science and AI research fundamentals to work closely with the AI Research team and conduct experiments when necessary. The platform is built to product standards, ensuring reliability and scalability for AI-driven code transpilation, modernization, optimization, modeling, and simulation solutions.

$205k - $250k

AgentMail

AgentMail is building the communication infrastructure for AI agents, enabling them to communicate and operate independently across various services. We've processed hundreds of millions of emails and serve developers building ambitious agentic products. We are seeking a Founding Product Engineer to define the customer experience of AgentMail. This role involves owning products from initial customer problems to daily developer use, encompassing end-to-end development across frontend, APIs, backend services, data models, and infrastructure. You will engage directly with customers, translate their challenges into product solutions, and shape the developer experience. The role requires rapid prototyping, meticulous attention to detail in product design and interaction, and contributing to the product engineering culture.

$175k - $250k

Join our Conversation Engine team to scale and optimize a cutting-edge Generative AI product that provides instant assistance to enterprise users. You will work at the core of Moveworks' Generative AI product, focusing on scaling and optimizing it for the enterprise solution space. We encourage innovative ideas to solve unsolved problems, collaborating closely with machine learning experts and cross-functional teams to rapidly iterate on new ideas and leverage user behavior data. Your challenge will be to scale and optimize our conversation engine to support hundreds of millions of users across multiple chat channels and use cases, enhancing our end-to-end product infrastructure with engineering quality and robustness.

$176k - $308k

Usul

Usul is a Silicon Valley AI lab dedicated to rebuilding the infrastructure that equips the Western world, enabling faster technology procurement for governments and commercial clients. As a Forward Deployed Engineer, you will work directly with operators and government clients to develop and implement AI-driven data and workflows for technology acquisition. You will also contribute to our commercial platform, assisting major defense companies and startups in securing government contracts.

$160k - $240k

Perplexity AI

Perplexity is seeking an experienced Machine Learning Engineer to advance how AI systems search, reason, and work together to solve complex problems. Our work spans search and retrieval, LLM post-training, multi-agent training, and the harnesses that make these systems effective. We control the full stack, giving us the freedom to develop new approaches across models, agent harnesses, and search infrastructure to use search more effectively, design tools and execution environments around learned behavior, and improve retrieval to support how agents actually work.

Salary not listed

Sierra

Sierra is a leading platform for customer-facing AI agents, partnering with major brands to transform customer service and business growth. The Applied Research team focuses on enhancing the quality, speed, and cost-efficiency of AI agents. This involves advancing post-training techniques for open-weight models, pioneering new approaches in voice AI, and translating research breakthroughs into robust production systems. The role involves tackling complex AI and ML challenges, building agents capable of reasoning and executing intricate tasks, and determining the optimal balance between custom models and external intelligence to maximize customer value.

Salary not listed

Invisible Technologies is seeking a Research Engineer to join its research organization, focusing on reinforcement learning, evaluation methodology, benchmarks, and RL environments for frontier labs and enterprise clients. This role involves defining how frontier models are measured, with direct influence over the methodology and its implementation. You will translate research questions into practical scoring frameworks, evaluation architectures, or environment designs, and then build the production systems to run them. This is a hands-on role for someone who wants to design the approach and write the code to prove it out, with reporting lines varying by experience level.

Salary not listed

Runpod

Runpod is seeking a systems-focused Cloud Infrastructure Security Engineer to safeguard its bare-metal and virtualized GPU cloud infrastructure. This role is crucial for ensuring the security, multi-tenant isolation, and integrity of the underlying GPU cloud infrastructure. The ideal candidate will have deep knowledge of Linux systems, kernel internals, hypervisors, and containerization, focusing on preventing tenant breakouts, securing GPU hardware, and building resilient infrastructure for AI and machine learning workloads. You will operate with an attacker's mindset, identifying and patching vulnerabilities at the lowest levels of the stack.

$152k - $175k

Hebbia is seeking a Front-End Engineer to join the Agents team, focusing on building the user interface for universal knowledge capture. This role involves creating simple, delightful experiences for users to direct long-running agents, review citations, and iterate on key deliverables. You will translate new agentic capabilities from the research team into polished web and iOS interfaces. Engineers are empowered to own features end-to-end, including building necessary backend components like new endpoints, streaming APIs, or custom tools. The position requires deep expertise in modern web front-end engineering, strong product sense, and comfort with backend development when needed. Experience with iOS development is highly valued as the team expands its mobile presence. You will collaborate closely with applied researchers and infrastructure engineers, understanding the full system from model calls to UI.

$160k - $300k

Credal.ai

Credal is seeking a founding web full-stack software engineer to help build a scalable, performant architecture while maintaining industry-leading security. This role involves owning aspects of stability, scalability, and security, ensuring reliable syncing of billions of records, and contributing to architecture and code quality. You will engage directly with customers to solve complex problems, mentor junior engineers, and take end-to-end ownership of core products. The ideal candidate is a versatile software engineer comfortable across the full stack, excited about Agentic AI/LLM applications, and possesses strong software engineering fundamentals.

$190k - $250k

Rescale

Rescale is seeking a product-focused Software Engineer, AI Systems to join their infrastructure organization. This role will focus on building and enhancing Rescale's Data Intelligence and Agentic AI platforms. The work involves developing production agents, retrieval systems, evaluation frameworks, and data ingestion pipelines that connect customer environments, cloud storage, and compute clusters. You will collaborate closely with Product Management to define customer problems, refine specifications, and prioritize deliverables, taking ownership of the technical design and execution of key platform components. A significant aspect of the role involves actively using Rescale's product to identify areas for improvement and iterating on launched features.

$115k - $159k

Sierra

Sierra is seeking a Software Engineer for its Inference team to build the systems that power their AI agents. This role focuses on making foundation models fast, reliable, and efficient at scale. You will define the inference architecture, working on systems for serving, routing, capacity management, and optimization for latency, reliability, and cost. This is a systems-first role at the intersection of distributed infrastructure and AI, requiring strong distributed systems fundamentals and experience with complex systems problems.

$230k - $390k

Parameter

Full time • San Francisco, CA • $180K – $240K • 2 openings Parameter builds AI agents that do offensive security work. Our agents run autonomous penetration tests against production applications and cloud environments, finding IDORs, broken access control, XSS, and infrastructure misconfigurations that scanners miss and that human pentest firms only look for once or twice a year. We are not a theoretical security company. Our team has responsibly disclosed real, high-severity vulnerabilities to well-known technology companies, and our findings are the front door to most of our customer relationships. You'll build the agent systems that do the actual hacking. That means designing the reasoning loops, tool interfaces, and memory architecture that let an LLM behave like a competent offensive security researcher rather than a fuzzer with good manners. The title points at where you'll spend most of your time. Expect the rest of the week to go wherever the work is: agent systems one day, the product the next, a customer call or a report that has to go out after that. We are small enough that everyone works across every product, and we hire people who want that. What you'll do - Design and ship agent workflows in LangGraph and Temporal that plan, execute, and verify multi-step exploitation chains - Build the tool layer the agents operate through: HTTP clients, auth handling, browser control, cloud enumeration, payload generation - Own the eval loop. We use Braintrust and Langfuse. You'll define what “good” means for agent runs and make the number go up - Reduce false positives, which is the single hardest problem in this space and the thing customers care most about - Manage inference cost and latency at scale, including prompt caching, context strategy, and model selection across Claude and Bedrock What we're looking for - 3+ years of software engineering, with at least one year building production LLM systems (not just prototypes or demos) - Strong TypeScript. Comfortable with async, distributed systems, and long-running workflow orchestration - Real intuition for context engineering, tool design, and why agents fail in the wild - You measure things. You've built or maintained an eval harness and know why offline metrics diverge from production behavior - Bonus: security background, CTF experience, bug bounty history, or a track record of breaking things you were not supposed to break Interview process - Intro call with a founder (30 minutes) - Technical deep dive on your past work (60 minutes) - Paid work trial or take-home, scoped to roughly one day - Onsite in San Francisco with the team - References and offer Stack TypeScript · LangGraph · Temporal · GCP · AWS Bedrock · Anthropic API · Langfuse · Braintrust · GitHub Actions · Linear · Graphite We move quickly. Our target is an offer within two weeks of first contact. Small team, high trust, extremely fast. If you want to see your work in front of customers within days, this is that. This role is onsite in San Francisco. You must be authorized to work in the US; we are not able to sponsor visas at this time.

$180k - $240k

Code Metal

Code Metal is seeking a Lead Backend Engineer to join their Modeling & Simulation team. This role will lead the backend and data engineering team responsible for building the Python services, APIs, and data systems that power a next-generation wargaming and decision-support platform. The ideal candidate will balance people leadership with hands-on technical ownership, providing Principal-level backend engineering judgment, guiding architecture, and tackling complex technical challenges while growing a team of engineers. This platform is crucial for enabling government users to make critical multi-billion-dollar force-design decisions.

$253k - $294k

HUD is building reliable, fair, and open infrastructure for AI data, aiming to make data valuable for creators and trustworthy for AI labs. As a Research Engineer on the Robotics team, you will develop datasets and evaluations crucial for training and assessing embodied AI systems. This role involves translating research needs into data specifications, creating methods for data validation, and conducting experiments to understand how data characteristics impact model performance. You will collaborate with internal research and engineering teams, and potentially with data vendors and buyers, to enhance robotics data offerings.

$100k - $230k

Together AI

Together AI is seeking a Staff Platform Infrastructure Engineer to lead service and platform infrastructure strategy across the engineering organization. This is a hands-on technical leadership role with the opportunity to establish a new team and define the standard for how services are built and operated. You will provide a stable, scalable service infrastructure foundation for mission-critical product and platform teams, focusing on reliability, repeatability, and ease of adoption. You will own and evolve crucial shared infrastructure, roll out new patterns and platform capabilities, and ensure services are built on company-wide foundations.

$240k - $280k

HeyGen is seeking an Applied AI Engineer to join the Video Agent team. This role focuses on enhancing the capabilities of an AI agent that transforms prompts, documents, or assets into finished videos. You will be responsible for improving the agent's ability to understand user requests, redesigning tools it utilizes, building evaluation frameworks, and shipping new features across the full stack. This position offers a unique opportunity to work directly with in-house trained models and researchers, owning features from conception to launch and making critical decisions about where to apply AI versus deterministic code.

$180k - $240k

Percepta

Percepta is transforming critical institutions with applied AI, embedding with industry-leading customers to drive AI transformation. We bring together forward-deployed expertise in engineering, product, and research, along with our in-house toolkit for rapidly deploying agentic workflows and strategic partnerships. As a Research Scientist - Reinforcement Learning, you will work at the intersection of RL research and real-world deployment, advancing decision-making capabilities for critical industries. You will collaborate closely with Embedded Product Managers and engineers to ensure our solutions transform how companies operate.

$200k - $400k