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Senior Software Engineer - API Experience

Job Overview

Location

San Francisco Office

Job Type

Full-time

Category

Software Engineer

Date Posted

March 25, 2026

Full Job Description

📋 Description

  • Lambda Inc. is at the forefront of AI cloud infrastructure, providing essential compute power to tens of thousands of customers, ranging from individual AI researchers to large enterprises and hyperscalers. Our mission is to democratize superintelligence, making advanced AI capabilities as accessible as electricity, with the ambitious goal of empowering every individual with the power of superintelligence, one GPU at a time. If you are passionate about building the world's premier AI cloud, we invite you to join our dynamic team.
  • This Senior Software Engineer role is integral to the API Experience team, a critical group responsible for Lambda's customer-facing Core Cloud APIs. This team ensures a seamless and powerful experience for all users interacting with our platform, managing everything from instance creation and storage attachment to Virtual Private Cloud (VPC) management. The primary objective is to deliver a delightful, consistent, and cohesive API-first experience, catering to the diverse needs of our customer base, from self-serve Public Cloud users to the most demanding AI companies globally. Your contributions will directly shape how customers interact with and leverage our cutting-edge AI cloud infrastructure, ensuring they have the tools and access they need to drive innovation.
  • In this role, you will be instrumental in building end-to-end features that enhance the Lambda Cloud platform. This involves contributing to both frontend and backend codebases, ensuring a holistic approach to feature development across existing and new functionalities. You will engage in close collaboration with Product Engineering, Platform, and Infrastructure teams, working synergistically to deliver robust solutions that span the entire technology stack. A key aspect of your work will involve partnering directly with Product Managers to meticulously design, scope, and deliver features that are paramount to customer success, all while upholding the highest standards of product quality and reliability. Furthermore, you will have the unique opportunity to work directly with the engineering teams of our Superintelligence customers, gaining invaluable insights into their specific challenges and requirements. You will also assume ownership of production features and systems, which includes active participation in incident response rotations, ensuring the continuous availability and performance of our services. A significant part of your responsibility will be to design and implement comprehensive observability and maintenance processes for the new features you help build, ensuring their long-term health and efficiency.
  • The ideal candidate will possess strong backend experience, specifically in building business-critical services using Python, proficiency in Unix/Command line operations, experience with frameworks like Django or FastAPI, and a solid understanding of Postgres databases. You should demonstrate a proven track record of owning complex features from inception to completion, encompassing problem definition with Product, through to General Availability (GA) release and the rigorous measurement of success criteria, particularly within highly ambiguous environments and under demanding deadlines. A key skill will be your proven ability to clearly articulate trade-offs related to scope and timelines, enabling informed decision-making. Crucially, you will have experience in designing, implementing, and maintaining developer-facing APIs and their accompanying documentation, ensuring clarity and ease of use for our customers.
  • Beyond core backend development, we value experience in CI/CD practices for automating testing and deployment workflows, ensuring efficient and reliable software delivery. A strong understanding of Reliability & Observability principles, including effective logging, alerting strategies, and the architecture of highly available systems, is essential. Familiarity with Cloud Native Services, such as AWS, Okta, and Cloudflare, will be highly beneficial in navigating our cloud ecosystem. For those looking to expand their expertise, opportunities exist to gain experience with Kubernetes, Infrastructure as Code tools like Terraform, Atlantis, or Crossplane, and to delve into the exciting fields of Machine Learning (ML), Artificial Intelligence (AI), or data science. Furthermore, a background in application security and web hardening, or experience in engineering leadership and mentorship, would be considered valuable assets, contributing to the growth and development of the team.
  • This role offers a significant opportunity for professional growth and impact. You will gain deep experience in building and scaling critical cloud infrastructure for the AI industry, working with cutting-edge technologies and directly influencing the product roadmap. You will have the chance to hone your skills in API design, distributed systems, and cloud-native architectures, while also developing expertise in customer engagement and technical problem-solving within a high-growth startup environment. The ability to own features from conception to production and contribute to a mission-critical service provides a unique platform for career advancement and the development of leadership capabilities.

Skills & Technologies

Python
Django
FastAPI
PostgreSQL
AWS
Backend
Senior
Onsite

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Lambda Inc. logo
Lambda Inc.
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About Lambda Inc.

Lambda Inc. provides cloud-based GPU clusters and workstations for artificial-intelligence research and development. The company designs and operates high-performance hardware infrastructure optimized for machine-learning workloads, offering on-demand access to NVIDIA GPUs, pre-configured deep-learning software stacks, and scalable storage. Customers include AI labs, universities, and enterprises training large language and computer-vision models. Founded in 2012, Lambda is headquartered in San Francisco and maintains data centers across North America and Europe.

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