Senior Applications Platform Engineer

PassiveLogic•Holladay, UT

5d•Onsite

About The Position

PassiveLogic is seeking a Senior Applications Platform Engineer to join their Applications Platform team. This role involves working across product and platform boundaries to ship user-facing features, strengthen shared application architecture, and lead complex integration work within a large codebase. The company is a hyper-scale AI company transforming the future of autonomous systems, energy, and the built environment. The Applications Platform team is responsible for the shared application layer of Hive Controllers, building and maintaining cross-app user experiences, frontend platform infrastructure, and integration points connecting cloud services, hardware-aware domain models, and PassiveLogic Studio applications.

Requirements

Proven experience building production software in JavaScript and TypeScript.
Track record of owning complex frontend or application-platform systems, not just isolated feature work.
Exceptional communication skills; ability to lead technical work across team boundaries.
Experience working effectively in a large monorepo or similarly shared codebase.
Collaborative mindset; enjoy working across teams.
Adaptability; comfortable in a fast-paced startup environment, eager to learn, iterate, and innovate.
Strong problem-solving skills; ability to be an empowered force that solves issues.
Experience designing reusable UI infrastructure, shared component systems, or design-system-adjacent platforms.
Strong understanding of application architecture, state management, and cross-system integration.
Ability to debug across UI, data flow, domain models, and runtime behavior.
Strong engineering judgment and the ability to break down ambiguous problems into executable work.

Nice To Haves

Experience with internal developer tooling, CI/CD workflows, test infrastructure, or observability.
Familiarity with hardware-integrated software, IoT, controls, or model-heavy application domains.
Background in improving platform reliability and developer productivity at scale.
Past knowledge of mentoring engineers and shaping technical direction for shared systems.

Responsibilities

Lead design and implementation of complex features spanning multiple applications and shared packages.
Build and maintain shared UI infrastructure, app-shell behavior, layout systems, and reusable platform components.
Develop integration layers between frontend applications, cloud services, Hive workflows, and hardware/domain models.
Improve reliability, maintainability, and developer velocity across the monorepo.
Drive technical design, debugging, code review, and architectural cleanup for cross-cutting systems.
Partner with product, design, cloud, and hardware teams to deliver coherent end-to-end solutions.
Mentor engineers and help raise the team’s standards for quality, testing, and technical decision-making.