Senior Machine Learning Systems Engineer

Atlassian is a software company focused on collaboration products and AI innovation across its platforms. The Senior Machine Learning Systems Engineer will design and optimize large-scale model serving systems, including distributed infrastructure, inference engines, and low-level GPU optimizations. The role also involves building reliable deployment infrastructure and partnering with senior ML engineers to fine-tune and deploy open-source LLMs.

Responsibilities:

• Architect and implement scalable distributed infrastructure for model serving (load balancing, auto-scaling, batch scheduling, global KV cache)
• Optimize latency and throughput of model inference under real production workloads
• Build reliable, high-concurrency serving systems that serve billions of requests reliably
• Benchmark, fine-tune, and accelerate inference engines
• Create robust CI/CD infrastructure for seamless model deployment and inference engine updates
• Partner with senior ML engineers to fine‑tune open-source LLMs and deploy

Requirements:

• 5+ years of software engineering experience, 2+ years of system performance optimization experience
• Deep low-level systems programming (C/C++ or Rust)
• Experience with large-scale, high-concurrent production serving
• Experience with GPU inference engines (vLLM, SGLang, Triton, TensorRT-LLM, etc.)
• Strong background in system optimizations: batching, caching, load balancing, parallelism
• Low-level inference optimizations: GPU kernels
• Algorithmic inference optimizations: quantization, speculative decoding, distillation
• Experience with testing, benchmarking, and reliability of inference services
• Experience designing and implementing CI/CD infrastructure for inference