Sr. Software Engineer - Core Platform

Company overview:

Let’s be real, AI isn’t magic; Legion was built to move beyond AI hype—delivering secure, reliable systems that work alongside the people tackling the world’s most critical challenges.

Born from a Department of Defense partnership and trusted by leaders across government and enterprise, Legion embeds intelligence inside complex systems, unlocking data, accelerating human workflows, and strengthening mission-critical systems. We don’t replace workflows—we optimize them, ensuring quality, efficiency, and reliability inside the platforms our partners already use.

With world-class collaborators like Palantir, Nvidia, HPE, and Oracle, we’re building intelligent infrastructure that enhances human capability and drives impact at the edge and across a range of enterprises.

We’re looking for bold thinkers and doers to join us in shaping the future of AI that’s secure, grounded, and built to work.

Job Summary:

As a Senior Software Engineer on the Core Platform Engineering team, you will play a crucial role in designing, developing, and maintaining the core infrastructure that underpins our revolutionary Generative AI platform. Your expertise in coding and architecture will be instrumental in creating a powerful and scalable foundation, while your proficiency in Rust will enable you to contribute to the growth of our technology stack. Your experience with production support, Kubernetes, and Docker will ensure the platform's stability and reliability.

Responsibilities:

• Lead the design and development of foundational components and frameworks that serve as the building blocks for our Generative AI platform.

• Collaborate with cross-functional teams to understand their needs and requirements, and create platform solutions that empower developers to build innovative applications on top of it.

• Cultivate a growth mindset, constantly studying and staying current with design patterns, techniques, and technologies that attract developers to platforms and frameworks.

• Work closely with data scientists and machine learning engineers to integrate Generative AI models into the platform, ensuring seamless and efficient execution within enterprises.

• Provide production support and troubleshooting expertise to ensure the platform's smooth operation and address any performance or scalability challenges.

• Stay abreast of industry trends and best practices related to platform engineering, and incorporate them into our platform to maintain its cutting-edge status.

• Mentor and guide junior engineers, fostering a culture of continuous learning and technical excellence within the team.

Required Skills and Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, or a related field or equivalent experience.

• Proven track record as an exceptional coder and burgeoning architect with at least 5 years of experience in software engineering and platform development.

• Proficiency in Rust, with experience in designing and developing high-performance systems. All our performance-critical areas are developed in Rust.

• Experience with REST APIs and Graph APIs, including designing, consuming, and optimizing API integrations across heterogeneous systems.

• Deep understanding of common API authentication and authorization mechanisms, including but not limited to OAuth 2.0, OIDC, API keys, JWT-based auth flows, Service accounts and workload identity federation, Basic auth and session-based auth patterns

• Hands-on experience integrating with external systems of record (e.g., CRM, HRIS, billing, identity providers) using SDKs, webhooks, and event-driven patterns.

• Prior experience leading the development of a framework or core piece of infrastructure/platform that has been widely adopted and built upon by teammates or customers.

• Strong working knowledge of Kubernetes and/or Docker, and experience in deploying and managing applications in containerized environments.

• Familiarity with cloud platforms such as AWS, Google Cloud, or Azure.

• Exceptional communication and collaboration skills to work effectively in a team-oriented environment.

• Have to be eligible to work in US without sponsorship

Preferred Qualifications:

• Previous experience in developing platforms for AI/ML applications or working with Generative AI models.

• Proficiency in Python.

• Understanding of DevOps practices and CI/CD pipelines for platform deployment.

• Contribution to open-source projects related to platform development or AI technologies.

Equal Opportunity Statement

Legion Intelligence provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Compensation Information
$185,000—$220,000 USD