Lexsi Labs is one of the leading frontier labs focused on building aligned, interpretable, and protected Superintelligence. Our work spans effective alignment methods, interpretability-led system design, and scalable AI platforms that operate reliably across enterprise and regulated environments. Our mission is to build AI systems that are powerful, transparent, and production-grade by design.
Our team operates with deep technical ownership, minimal hierarchy, and a robust bias toward building systems that work at scale. At Lexsi.ai, infrastructure is not support work. It is a core product capability.
As a Senior Infrastructure Software Engineer, you will architect, build, and operate the core backend and deployment systems that power the Lexsi AI platform. You will own multi-cloud, serverless, and stateless AI deployments, ensuring our systems scale seamlessly across environments of any size while maintaining correctness, reliability, and cost efficiency.
This role is ideal for someone who thinks like SDE + Platform Engineer + DevOps, and takes pride in owning systems end-to-end.




Responsibilities
Design and build Python-based backend services that power core platform functionality and AI workflows.
Architect and operate AI/LLM inference and serving infrastructure at production scale.
Build stateless, serverless, and horizontally scalable systems that can run across environments of varying sizes.
Design multi-cloud infrastructure across AWS, Azure, and GCP with portability and reliability as first-class goals.
Deploy and manage containerized workloads using Docker, Kubernetes, ECS, or equivalent systems.
Build and operate distributed compute systems for AI workloads, including inference-heavy and RL-style execution patterns.
Implement Infrastructure as Code using Terraform, CloudFormation, Pulumi, or similar tools.
Own CI/CD pipelines for backend services, infrastructure, and AI workloads.
Optimize GPU and compute usage for performance, cost, batching, and autoscaling.
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📌 Senior Software Engineer Mumbai (India)
🏢 Lexsi Labs
📍 India