Senior Software Engineer

Senior Software Engineer - Application Engineer

PassiveLogic

Location:
United States, Salt Lake City

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

This is a career-defining opportunity to play a crucial role in a hyper-scale AI company that is transforming the future of autonomous systems, energy, and the built environment. As our Senior Application Engineer, you’ll play a pivotal role in building an ecosystem of local-first web applications that enable PassiveLogic’s autonomous systems platform. Our software applications enable users to collaboratively create physics-based models of the components from which autonomous systems are comprised, simulate the buildings in which autonomous systems will run, and generatively design autonomous systems with a human-centered interface to interact with their systems — no more black box AI. At its core, our ecosystem is powered by Quantum, a schema for describing autonomous system Digital Twins, and DataSync, a real-time protocol for graph-based client/server data synchronization. We use empathetic Human-Computer-Interface (HCI) principles in our design, and TypeScript, WebGL, SVG, and reactive dataflow in our code. As part of our long-term vision, we are developing constraint-based layout engines, AI-enabled generative design capabilities, and exploring the use of Swift compiled to WebAssembly to improve the usability of our code across many platforms.

Job Responsibility:

Design and Implement Front End Architecture: Lead the design and implementation of front end architecture to support native-quality web applications for multi-platform deployment.
Contribute Across Teams: Collaborate cross-functionally to build our technology and celebrate our shared successes. Be impact-driven, seek to be a good employee, neighbor, and global citizen.
Optimize Systems-level Performance: Be a systems-level thinker who researches before they act and values sound processes and broad thinking.
Prioritize Execution, Stability, and Velocity: Focus on delivering short-term wins while maintaining a long-term vision within our shared architecture. Take pride in the impact of our products and in delivering a 'wow' customer experience.
Nerd Out About Your Craft: Dive deep into the details and continuously refine your expertise.

Requirements:

5+ years in software engineering, computer science, front-end web-application development, or a related field
Strong JavaScript, TypeScript, or Swift experience
Strong algorithms, data structures, and coding background
Experience with user interface frameworks (e.g. Angular, React, Vue, Swift UI etc.)
Extraordinary teammate with excellent interpersonal skills
Exceptional communication skills: Ability to collaborate across teams, clearly communicate technical concepts to non-technical stakeholders, and document solutions effectively.
Organized and strategic: Experience in managing complex engineering projects, including timelines, scope, and deliverables, with attention to detail.
Collaborative mindset: Use your skillset to work flexibly across multiple teams and application.
Adaptability: Comfortable in a fast-paced startup environment, eager to learn, iterate, and innovate.
Problem solving: You own this role. When issues arise, be the empowered force that solves them, driving solutions to completion.

Nice to have:

Experience with: Developing and using design systems
Experience with the architectural patterns found in large-scale web applications, including well-designed APIs, high-volume data pipelines, and efficient algorithms.
SVG programming familiarity: Experience with technologies like SVG.js and Snap.js.
3D programming or computer graphics familiarity: Background in using frameworks such as WebGL, WebGPU, and Three.js.
Real-time data analysis tools implementation: Experience implementing tools for analyzing and exploring large real-time data sets.
Experience utilizing multiple programming paradigms: Proficiency in various programming paradigms such as object-oriented, functional, data-driven, protocol-oriented, and/or reactive programming.
Exposure to: Distributed data tools, frameworks, and methodologies such as OT, CRDT, RealmDB, and AWS AppSync.
WebAssembly

What we offer:

Competitive compensation
Generous equity share package
Medical, dental and vision coverage
Disability and life Insurance options
Flex PTO
Team-building events
Free catered lunch in the office Monday — Friday
Free ski pass (We are at the base of Big Cottonwood Canyon)
Free National Park pass

Additional Information:

Job Posted:
December 11, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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