Assembly AI

Senior Research Engineer, JAX

Senior Research Engineer

We are seeking a highly skilled Senior Research Engineer to collaborate closely with both Research and Engineering teams. The role involves diagnosing and resolving bottlenecks across large-scale distributed training, data processing, and inference systems, while also driving optimizations for existing high-performance pipelines. This cross-functional position requires strong technical rigor, intellectual curiosity, and excellent communication. You will maintain and evolve our JAX training framework, optimize production JAX inference systems, refactor model architectures, investigate performance bottlenecks, and design scalable workloads for TPU/GPU architectures, bridging research and production engineering.

<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">About the Role</h2><p class="my-4 text-gray-700 leading-relaxed">We are seeking a highly skilled <strong>Senior Research Engineer</strong> to collaborate closely with both Research and Engineering teams. The role involves diagnosing and resolving bottlenecks across large-scale distributed training, data processing, and inference systems, while also driving optimizations for existing high-performance pipelines.</p><p class="my-4 text-gray-700 leading-relaxed">The ideal candidate possesses a deep understanding of modern deep learning systems, combined with strong engineering expertise in areas such as layer-level optimization, large-scale distributed training, streaming, low-latency and asynchronous inference, inference compilers, and advanced parallelization techniques.</p><p class="my-4 text-gray-700 leading-relaxed">This is a cross-functional role requiring strong technical rigor, attention to detail, intellectual curiosity, and excellent communication skills. The position is embedded within the Research team and is responsible for developing and refining the technical foundation that enables cutting-edge research and translates its outcomes into production, bridging research and production engineering.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What You’ll Do</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Maintain and evolve our JAX training framework, ensuring scalability and efficiency for large-scale distributed training runs.</li><li class="leading-relaxed">Optimize production JAX inference systems for speech-to-text models using advanced techniques like continuous batching, model sharding, paged attention, and quantization.</li><li class="leading-relaxed">Refactor and modernize model architectures and infrastructure, translating research prototypes into production-ready systems.</li><li class="leading-relaxed">Investigate and resolve performance bottlenecks across the stack—from low-level kernels (XLA, Pallas) to high-level system design.</li><li class="leading-relaxed">Design and deploy scalable, distributed workloads optimized for TPU and GPU architectures.</li><li class="leading-relaxed">Bridge Research and Engineering teams, ensuring seamless knowledge transfer and alignment on technical priorities.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What You’ll Need</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed"><strong>Expert-level proficiency with JAX</strong> and its ecosystem (Flax, Optax, XLA compilation pipeline).</li><li class="leading-relaxed">Strong experience optimizing inference systems for production, ideally with LLMs or speech models.</li><li class="leading-relaxed">Hands-on experience with <strong>TPU programming and optimization</strong>; GPU/CUDA expertise is also valuable.</li><li class="leading-relaxed">Passion for <strong>refactoring and improving existing systems</strong>—you thrive on making code faster, cleaner, and more maintainable.</li><li class="leading-relaxed">Familiarity with modern inference optimization techniques: continuous batching, KV-cache management, sharding strategies, quantization.</li><li class="leading-relaxed">Domain knowledge in <strong>Speech-to-Text</strong> (ASR architectures, audio processing, streaming inference) is a plus.</li><li class="leading-relaxed">Strong Python skills; C++ or Rust experience for kernel-level work is a plus.</li><li class="leading-relaxed">Deep understanding of distributed training at scale and ML infrastructure best practices.</li><li class="leading-relaxed">Excellent communication skills and a collaborative mindset—you can clearly explain complex tradeoffs and prioritize high-impact work.</li></ul>

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They play a crucial role in transforming raw data into actionable insights, enabling informed decision-making and driving business growth. In data engineering at PwC, you will focus on designing and building data infrastructure and systems to enable efficient data processing and analysis. You will be responsible for developing and implementing data pipelines, data integration, and data transformation solutions.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Why PWC</h2><p class="my-4 text-gray-700 leading-relaxed">At PwC, you will be part of a vibrant community of solvers that leads with trust and creates distinctive outcomes for our clients and communities. This purpose-led and values-driven work, powered by technology in an environment that drives innovation, will enable you to make a tangible impact in the real world. We reward your contributions, support your wellbeing, and offer inclusive benefits, flexibility programmes and mentorship that will help you thrive in work and life. Together, we grow, learn, care, collaborate, and create a future of infinite experiences for each other. Learn more about us.</p><p class="my-4 text-gray-700 leading-relaxed">At PwC, we believe in providing equal employment opportunities, without any discrimination on the grounds of gender, ethnic background, age, disability, marital status, sexual orientation, pregnancy, gender identity or expression, religion or other beliefs, perceived differences and status protected by law. We strive to create an environment where each one of our people can bring their true selves and contribute to their personal growth and the firm’s growth. To enable this, we have zero tolerance for any discrimination and harassment based on the above considerations.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Job Description & Summary: A career within….</h2><p class="my-4 text-gray-700 leading-relaxed">A career within Data and Analytics services will provide you with the opportunity to help organisations uncover enterprise insights and drive business results using smarter data analytics. We focus on a collection of organisational technology capabilities, including business intelligence, data management, and data assurance that help our clients drive innovation, growth, and change within their organisations in order to keep up with the changing nature of customers and technology. We make impactful decisions by mixing mind and machine to leverage data, understand and navigate risk, and help our clients gain a competitive edge.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Responsibilities:</h2><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Must have:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Candidates with minimum 2-3 years of relevant experience for 5-8 years of total experience.</li><li class="leading-relaxed">Deep expertise with technologies such as Data factory, Data Bricks (Advanced), SQLDB (writing complex Stored Procedures), Synapse, Python scripting (mandatory), Pyspark scripting, Azure Analysis Services.</li><li class="leading-relaxed">Must be certified with DP 203 (Azure Data Engineer Associate), Databricks Certified Data Engineer Professional (Architect / Managerial level).</li><li class="leading-relaxed">Strong troubleshooting and debugging skills.</li><li class="leading-relaxed">Proven experience in working source control technologies (such as GITHUB, Azure DevOps), build and release pipelines.</li><li class="leading-relaxed">Experience in writing complex PySpark queries to perform data analysis.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Mandatory skill sets:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Azure Databricks, Pyspark, Datafactory</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Preferred skill sets:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Azure Databricks, Pyspark, Datafactory, Python, Azure Devops</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Years of experience required:</h3><p class="my-4 text-gray-700 leading-relaxed">5-8yrs</p><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Education qualification:</h3><p class="my-4 text-gray-700 leading-relaxed">B.Tech / M.Tech / M.E / MCA/B.E</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Education</h2><p class="my-4 text-gray-700 leading-relaxed">Degrees/Field of Study required: Bachelor of Engineering, Master of Engineering, Bachelor of Technology</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Required Skills</h2><p class="my-4 text-gray-700 leading-relaxed">Azure Data Box, Databricks Platform</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Optional Skills</h2><p class="my-4 text-gray-700 leading-relaxed">Accepting Feedback, Accepting Feedback, Active Listening, Agile Scalability, Amazon Web Services (AWS), Analytical Thinking, Apache Airflow, Apache Hadoop, Azure Data Factory, Communication, Creativity, Data Anonymization, Data Architecture, Database Administration, Database Management System (DBMS), Database Optimization, Database Security Best Practices, Databricks Unified Data Analytics Platform, Data Engineering, Data Engineering Platforms, Data Infrastructure, Data Integration, Data Lake, Data Modeling, Data Pipeline {+ 27 more}</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Travel Requirements</h2><p class="my-4 text-gray-700 leading-relaxed">Not Specified</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Available for Work Visa Sponsorship?</h2><p class="my-4 text-gray-700 leading-relaxed">No</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Government Clearance Required?</h2><p class="my-4 text-gray-700 leading-relaxed">No</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Job Posting End Date</h2>

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! - This assessment gives us an idea of your problem solving skills using DSA- Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc.- 10 Multiple Choice questions

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Programming Patterns

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Senior Research Engineer, JAX

Senior Research Engineer

Job Details