Note: The job is a remote job and is open to candidates in USA. BJAK is building a proactive AI smart assistant for everyday users to enhance conversations and workflows. The Principal Machine Learning Engineer will be responsible for designing and evolving critical ML systems, focusing on architecture, performance, and collaboration with application engineering to integrate ML systems into products.
Responsibilities
- Architect and build large-scale ML systems spanning data, training, evaluation, inference, and deployment
- Design reproducible, high-performance training pipelines across GPU infrastructure
- Architect inference systems that balance latency, throughput, cost, and reliability at scale
- Design and maintain data systems for high-quality synthetic and real-world training data
- Implement evaluation pipelines covering performance, robustness, safety, and bias, in partnership with research leadership
- Own production deployment, including GPU optimization, memory efficiency, latency reduction, and scaling policies
- Collaborate closely with application engineering to integrate ML systems cleanly into backend, mobile, and desktop products
- Make pragmatic trade-offs and ship improvements quickly, learning from real usage
- Work under real production constraints: latency, cost, reliability, and safety
Skills
- Strong background in deep learning and transformer-based architectures
- Hands-on experience training, fine-tuning, or deploying large-scale ML models in production
- Proficiency with at least one modern ML framework (e.g. PyTorch, JAX), and ability to learn others quickly
- Experience with distributed training and inference frameworks (e.g. DeepSpeed, FSDP, Megatron, ZeRO, Ray)
- Strong software engineering fundamentals – you write robust, maintainable, production-grade systems
- Experience with GPU optimization, including memory efficiency, quantization, and mixed precision
- Comfort owning ambiguous, zero-to-one ML systems end-to-end
- A bias toward shipping, learning fast, and improving systems through iteration
- Experience with LLM inference frameworks such as vLLM, TensorRT-LLM, or FasterTransformer
- Contributions to open-source ML or systems libraries
- Background in scientific computing, compilers, or GPU kernels
- Experience with RLHF pipelines (PPO, DPO, ORPO)
- Experience training or deploying multimodal or diffusion models
- Experience with large-scale data processing (Apache Arrow, Spark, Ray)
Company Overview