Lead C++ Developer w Łódź, Polska

We are seeking a talented Lead C++ Developer to join the highly interdisciplinary CoreML team, where you will drive the performance and optimization of both training and serving, delivering massive impact for customers. In this role, you will have exposure to the newest Tensor Processing Unit (TPU), Graphics Processing Unit (GPU) hardware, the latest ML models, and the advanced toolchains that bridge them. Your work will directly enable AI research, production deployments and the broader open-source ecosystem, addressing complex technical issues that directly impact the efficiency and scalability of AI across the industry. Responsibilities Design and optimize high-performance kernels (using languages like Pallas, Mosaic and Triton) targeting Tensor Processing Unit (TPU) and Graphics Processing Unit (GPU) architectures for critical Machine Learning (ML) operations, redefining what's possible from massive training runs to high-speed inferenceArchitecture of infrastructure such as benchmarking suites, autotuning frameworks, performance analysis tools, regression testing and documentation, transforming how the developer community interacts with increasingly critical custom kernels in key Open-Source Software (OSS) librariesTrack the latest advancements in hardware architectures, compiler technologies and AI models to identify new opportunities for performance optimization through custom kernelsEngagement with ML researchers, framework developers (Just After eXecution (JAX), PyTorch) and compiler engineers (Accelerated Linear Algebra (XLA)) to enhance adoption, identify new requirements and address bottlenecks by providing appropriate solutions Requirements Bachelor's degree or equivalent practical experienceOverall 7+ years of industry experience5 years of experience with software development in C++ or Python3 years of experience testing, maintaining or launching software products, and 1 year of experience with software design and architectureLLM experienceExpertise in performance optimization at the kernel levelEnglish proficiency at B2 level or higher Nice to have Skills in optimizing TPU/GPU code, using low-level kernel languages like Pallas, Compute Unified Device Architecture (CUDA) or TritonKnowledge of ML Frameworks (JAX/PyTorch), common operations like attention and Mixture of Experts (MoEs), including model optimization and low-precision formatsUnderstanding of modern accelerators (e.g., data movement, pipelining, heterogeneous compute and scale-out)Understanding of compiler principles (optimization, code generation) and toolchains such as MLIR and OpenXLAShowcase of building developer infrastructure, including Open-Source Software (OSS) libraries, flexible high-performance APIs and easy-to-consume documentation to empower the community We offer We gather like-minded people:Top tech minds driving innovation in AI, cloud and digital platform modernizationSupportive team and agile, startup-like cultureHybrid by design mode and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Career development programsThought leadership, mentoring, soft skills and well-being programsCertification (Anthropic, Gemini, GCP, Azure, AWS)English classesWe cover it all:Stable payParticipation in the Employee Stock Purchase Plan with a 15% discountBenefits package (health insurance, multisport, shopping vouchers)Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and moreCorporate, social and well-being eventsPlease, note:Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.