AI Startup Jobs

Together AI

Together is seeking a Senior Product Engineer to join their central Product Engineering team, working closely with the Commerce engineering team. You will be responsible for the product UI for Together AI's critical user flows, including enterprise spend controls, governance, usage-based pricing, metering dashboards, payment management, and enterprise contract interfaces. This role requires a hands-on individual who can efficiently break down ambiguous tasks, deliver improvements quickly, and make pragmatic decisions to drive customer and revenue impact. You will collaborate with product, design, and backend engineers, leveraging strong product judgment to make UX decisions within established patterns.

$160k - $230k

Together AI

At Together AI, you will be responsible for the systems and tooling that enable engineers to ship code quickly and reliably. This includes CI/CD pipelines, release infrastructure, local development environments, and testing systems. This is a build-heavy, high-leverage role where you will drive large projects end-to-end, focusing on building the infrastructure that makes manual effort unnecessary and allows engineers to concentrate on product development.

$180k - $250k

Together AI

The Inference Research team is dedicated to building the next generation of efficient, scalable, and reliable serving systems for large foundation models, advancing open and transparent AI. This role operates at the intersection of model architectures, high-performance systems engineering, and hardware optimization, focusing on co-designing software, algorithms, and models to reduce the cost and latency of AI systems. As a research intern, you will explore distributed inference, compiler-aware optimization, and novel inference-time computation strategies, co-designing and implementing cross-layer optimizations across models, systems, and hardware, with a focus on KV cache design and large-scale serving architectures. Projects aim to unlock unprecedented performance and scale for foundation models, enabling faster serving, larger model deployment, and robust evaluation under realistic serving workloads.

Salary not listed

Together AI

The Inference Research team is dedicated to building the next generation of efficient, scalable, and reliable serving systems for large foundation models, advancing open and transparent AI. This role operates at the intersection of model architectures, high-performance systems engineering, and hardware optimization, focusing on co-designing software, algorithms, and models to reduce the cost and latency of AI systems. As a research intern, you will explore distributed inference, compiler-aware optimization, and novel inference-time computation strategies, co-designing and implementing cross-layer optimizations across models, systems, and hardware.

Salary not listed

Together AI

The Agents team focuses on building, aligning, and scaling advanced AI systems capable of handling complex, multi-step tasks and workflows across text and speech, particularly in agentic and scientific domains. This role sits at the intersection of agent capabilities, human-computer interaction, and infrastructure, exploring areas like post-training methods for agentic behavior and evaluation frameworks for open-ended tasks. As a research intern, you will contribute to cutting-edge agentic AI challenges, addressing issues of alignment, reliability, and scalability. Projects may involve developing new training techniques for self-learning and long-horizon reasoning, curating datasets for scientific and agentic tasks, analyzing agentic behavior failure modes, or building scalable agent operation infrastructure.

Salary not listed

Together AI

The Agents team investigates how to build, align, and scale frontier AI systems capable of complex, multi-step tasks across text and speech, focusing on agentic and scientific domains. This role sits at the intersection of agent capabilities, human-computer interaction, and infrastructure, exploring areas like post-training methods for agentic behavior and evaluation frameworks for open-ended tasks. As a research intern, you will tackle challenges in alignment, reliability, and scalability, potentially working on new training recipes for self-learning, curating datasets for non-deterministic tasks, studying agentic behavior failure modes, or building large-scale agent operation infrastructure.

Salary not listed

Together AI

Together AI's Model Shaping team focuses on tailoring open foundation models for downstream applications, building services that help ML developers select and improve models with domain-specific data. The team also develops efficient model training and evaluation methods, drawing from machine learning, NLP, and ML systems. As a Research Engineer, you will develop a platform for users to customize open-source models with their own data, working across training and inference stacks. You will build and enhance services for Fine-Tuning, Reinforcement Learning, and Evaluation, ensuring a smooth transition from post-training to production serving and optimizing inference engines for RL training. Collaboration with product, research, and engineering teams is key to maintaining API reliability and performance, ultimately contributing to the foundational layer of the open-source AI ecosystem.

$200k - $290k

Together AI

The Model Shaping team at Together AI focuses on tailoring open foundation models for downstream applications, building services that help machine learning developers select and improve models with domain-specific data. We also develop novel methods for efficient model training and evaluation, drawing from machine learning, natural language processing, and ML systems. As a Research Engineer on the Scaling Team, you will translate cutting-edge research in efficient foundation model training into robust, high-performance systems. You will optimize Together's training infrastructure, identify performance bottlenecks, and implement state-of-the-art techniques in production environments. Your work will directly influence the fine-tuning experience for Together's customers. You will integrate newly released open-source models onto the platform, ensuring efficient and reliable training across diverse workloads. Collaborating with Research Scientists, you will build experimental infrastructure to accelerate research and deploy validated ideas at scale.

$200k - $290k

Together AI

The Model Shaping team at Together AI focuses on products and research for tailoring open foundation models to downstream applications. We build services that enable machine learning developers to select optimal models for their tasks and enhance them with domain-specific data. Additionally, we develop novel methods for efficient model training and evaluation, drawing from diverse ideas in machine learning, natural language processing, and ML systems. As a Platform Engineer in this team, you will operate at the intersection of backend engineering and infrastructure, developing the core layers of Together’s platform for model customization and evaluation. Your role will involve designing, developing, and maintaining the backend services and underlying systems necessary for sustainably and reliably scaling production workflows for users and internal research experiments. You will collaborate cross-functionally with other engineers and researchers to enhance infrastructure based on project needs and integrate services with other engineering teams at Together.

$200k - $290k

Together AI

Together AI is seeking a Manager to oversee commercial relationships with international cloud compute suppliers and develop market intelligence to guide compute supply strategy. This role involves managing the entire lifecycle of international cloud service provider (CSP) contracts and renewals, conducting RFPs for new capacity, establishing global GPU cloud pricing benchmarks, and collaborating with infrastructure engineering, finance, and go-to-market teams to ensure optimal capacity and economics during rapid global GPU fleet expansion.

$190k - $220k

Together AI

As a Customer Success Engineer at Together AI, you will be the named technical owner for one of our most strategic customer relationships. You will serve as the primary technical point of contact across all infrastructure domains, including compute, networking, storage, and facilities, ensuring the flawless delivery and operational health of large-scale GPU deployments. This role is crucial for driving both customer success and company growth by combining deep infrastructure expertise with high-stakes customer partnerships.

$260k - $290k

Together AI

Together AI is building the AI Acceleration Cloud, an end-to-end platform for the full generative AI lifecycle. As a Senior Backend Engineer, you will play a key role in building the next generation AI cloud platform – a highly available, global, blazing-fast cloud infrastructure that virtualizes cutting-edge ML hardware and enables state-of-the-art ML practitioners with self-serve AI cloud services. This platform serves both internal StaaS products and external cloud customers across dozens of data centers worldwide.

$160k - $230k

Together AI

Together AI is building the Inference Platform to deliver advanced generative AI models, powering multi-tenant serverless workloads and dedicated endpoints. This platform enables developers, enterprises, and researchers to utilize the latest LLMs and multimodal models at scale. The role focuses on optimizing latency and maximizing the utilization of tens of thousands of GPUs. You will collaborate directly with research teams to productionize frontier models and engage with the open-source community, contributing to and leveraging projects like SGLang and vLLM to enhance inference performance and efficiency.

$200k - $290k

Together AI

As a Systems Research Engineer specialized in GPU Programming, you will play a crucial role in developing and optimizing GPU-accelerated kernels and algorithms for ML/AI applications. You will co-design GPU kernels and model architecture to enhance the performance and efficiency of our AI systems, and contribute to the co-design of efficient GPU architectures and programming models. Your research skills will be vital in staying up-to-date with the latest advancements in GPU programming techniques, ensuring that our AI infrastructure remains at the forefront of innovation.

$200k - $300k

Together AI

Together AI is building the best inference infrastructure for voice applications, powering production-grade, real-time voice agents and applications with best-in-class latency and reliability for speech-to-text and text-to-speech models. We are seeking a Staff ML Engineer to lead the model serving layer for voice workloads. This role involves hands-on optimization of inference engines and models, profiling GPU utilization, designing batching strategies for streaming audio, and ensuring rapid deployment of new model architectures from research to production. This is a foundational hire on a small, high-impact team, addressing the unique challenges of voice inference such as streaming audio, tokenization, and real-time latency budgets, and shaping the future of voice model serving.

$220k - $280k

Together AI

Together AI is building the best inference infrastructure for voice applications, powering real-time voice agents and applications with best-in-class latency and reliability for speech-to-text and text-to-speech models. We are seeking a Senior ML Engineer to lead the model serving layer for voice workloads. You will optimize inference engines like TRT-LLM and SGLang to serve models such as Whisper, Parakeet, Orpheus, and Kokoro, focusing on pushing latency and throughput boundaries. This role involves profiling GPU utilization, designing batching strategies for streaming audio, and accelerating the transition of new model architectures from research to production. As a foundational hire on a small, high-impact team, you will address the unique challenges of voice inference, including streaming audio, real-time latency, and tokenization, shaping how Together serves voice models as the industry moves towards end-to-end speech-to-speech systems.

$200k - $260k

Together AI

Together AI is seeking a Machine Learning Engineer to join our Inference Engine team, focusing on optimizing and enhancing the performance of our AI inference systems. This role involves working with state-of-the-art large language models and ensuring they run efficiently and effectively at scale. You will have the chance to collaborate closely with AI researchers and engineers to create cutting-edge AI solutions and shape the future of AI inference.

$200k - $300k

Together AI

At Together AI, you will build and operate one of the world's largest GPU fleets for frontier model training and inference. This role is for engineers who excel at building systems, automating processes, and solving problems at a massive scale. If you prefer writing software over manual operations and aim to build infrastructure that autonomously manages tens of thousands of GPUs, we encourage you to apply.

$190k - $270k

Runpod

Runpod is seeking a Forward Deployed Engineer to join their Revenue Team, focusing on supporting the growth of their AI Developer Cloud platform. This role is crucial for ensuring customers have a seamless experience by addressing technical challenges, guiding onboarding, and fostering strong relationships. You will collaborate closely with customers, sales, product, engineering, and support teams to provide technical insights, resolve complex issues, and drive product improvements. The ideal candidate combines deep technical expertise with excellent communication skills to enhance customer satisfaction and contribute to the platform's success.

$100k - $160k

Observe.AI is seeking a client-facing AI Agent Engineer to design, integrate, and deploy enterprise-grade Voice and Chat AI agents and AI Copilots. This is a hands-on, delivery-focused role where you will work directly with customers to translate requirements into working solutions by configuring integrations, designing prompts and workflows, and deploying scalable AI agents. You will own the end-to-end lifecycle of AI agent delivery, from initial design and integration through testing, client demos, deployment, and ongoing iteration. This role is ideal for someone who enjoys problem-solving across systems, working with APIs, and delivering real-world AI applications, rather than building foundational AI models.

Salary not listed

Isomorphic Labs is seeking a Staff Software Engineer to join their Inference Platform team in London. This role is pivotal in ensuring the reliability and scalability of the company's AI infrastructure, which is used to build foundation models for drug discovery. You will play a key part in hardening systems and ensuring the AI infrastructure is stable, reliable, and can handle increasing data volumes and model sizes as the company grows. This is an opportunity to contribute to groundbreaking innovation in applying AI to cure disease within an interdisciplinary team.

Salary not listed

Perplexity AI

Perplexity is looking for an experienced Machine Learning Research Engineer to contribute to the development of next-generation advanced search technologies, with a particular emphasis on retrieval and ranking. This role involves architecting and building core components of the search platform and model stack, and deploying models from boosting algorithms to LLMs in a scalable and performant manner. The engineer will also be responsible for building and optimizing RAG pipelines for grounding and answer generation, and collaborating with cross-functional teams to ensure high-quality delivery.

Salary not listed

Arize AI

Arize AI is seeking an AI Application Engineer to join their team and work at the forefront of generative AI. This role offers the chance to solve complex problems with code, build internal tools and copilots powered by generative AI, and rapidly prototype solutions for customer use cases. You will collaborate across Engineering, Product, and Solutions teams to support customers and advance AI adoption. While Arize is a remote-first company, this specific role requires candidates to be based in the Singapore area.

Salary not listed

Together AI

As a Customer Support Engineer at Together AI, you will be the primary point of contact for customers building AI solutions, including training, fine-tuning, and inference. You will tackle complex technical challenges, provide expert solutions, and act as a product specialist. This role involves close collaboration with product and sales teams to enhance offerings and drive customer success in a fast-paced, innovative AI environment.

Salary not listed