Senior Unity Developer (Mobile & UI Systems)

About Immerse

Immerse is building the enterprise platform for Fluency Performance, helping language learners around the world communicate with confidence when it matters most. Our interdisciplinary team of designers, developers, and language experts builds immersive experiences that connect language learning to measurable business outcomes.

Why this role exists

Our product spans multiple surfaces (desktop, VR, and mobile), and UI is a core part of how learners succeed. We’re hiring a senior UI engineer who will contribute broadly across UI implementations while bringing a strong mobile-first skillset to the team: responsive layout discipline, real-device performance instincts, and production-grade API-driven UI patterns.

You’ll be expected to own outcomes, make sound tradeoffs, and collaborate tightly with Design, Product, and Education teams to ship polished, resilient UI that holds up in production.

What you will ship in your first 90 days

You will own and ship multiple production Unity UI screens and flows end-to-end, including:

• Implementing designs from Figma in Unity uGUI with extendable architecture
• Integrating with backend REST APIs, including async loading, empty, error states, retries, and cancellation
• Profiling and fixing UI performance issues on real desktop, VR, and mobile devices
• Shipping, measuring impact, and iterating post-launch based on analytics + customer/internal feedback

You’ll also contribute to shared UI patterns that benefit our broader surfaces (desktop/VR), using mobile discipline to raise the bar for performance and reliability everywhere.

What this role is focused on

We are looking for someone who consistently demonstrates:

• End-to-end ownership of complex, API-driven UI flows in production
• Strong judgment under constraints (prioritization, tradeoffs, risk management)
• Clear communication with designers and product partners, including crisp handoffs and async walkthroughs
• Production-minded engineering habits (maintainability, debuggability, reviewability)
• A performance-first mindset on real devices (not just in-editor)

Primary emphasis:

• Unity UI (uGUI): Canvas, RectTransform, Layout Groups, TextMeshPro
• Mobile-first responsive layout: portrait constraints, safe areas, varying aspect ratios and resolutions
• REST-driven UI: auth-aware flows, async state management, backend failure modes
• Lifecycle-safe async: stale-response protection, request cancellation on navigation, deterministic state transitions
• Large data UI patterns: pooling/virtualization, incremental rendering, placeholder/skeleton states
• Performance ownership: layout rebuilds, overdraw, draw calls, allocations/GC, memory
• UI architecture that scales: navigation, composition, reusable components, clean boundaries between UI and data
• Practical testing fundamentals: Unity Test Framework basics for UI logic/state handling
• Cross-functional iteration loops: partner with Product + Design to improve shipped experiences

Responsibilities

• Own delivery of key UI screens and flows end-to-end: discovery, implementation, integration, edge cases, release readiness, and iteration
• Translate Figma designs into production-ready uGUI with stable layout behavior across devices/resolutions
• Build API-driven flows with robust UI states: loading, error, empty, partial data, retries, cancellation, and resilient error handling
• Profile and improve UI performance on lowest supported devices (layout rebuilds, overdraw, draw calls, allocations/GC, memory)
• Establish maintainable UI patterns that support rapid iteration (state management, navigation, composition, reuse)
• Partner closely with Designers and Product Managers to clarify intent, surface edge cases, propose tradeoffs, and align scope early
• Contribute to and maintain UI development documentation (patterns, tokens, performance guidelines, review practices)
• Mentor other Unity engineers through reviews/pairing, raising quality and consistency across UI work
• Keep informed on the market landscape and stay ahead of industry trends to ensure development workflows and design implementations remain competitive and innovative in the application space

Required experience

To be successful in this role, you must have:

• Highly organized and capable of organizing others
• 8+ senior-level experience shipping production software, including 3+ years owning Unity UI systems/front-end engineering (or equivalent experience)
• Shipped and maintained at least one production Unity application with real users
• Strong mobile Unity context (iOS/Android) and evidence of mobile-first UI discipline
• Clear evidence of end-to-end ownership of Unity UI screens/flows (not only small pieces of features)
• Deep uGUI expertise and the ability to debug layout behavior confidently
• Strong C# fundamentals with production-minded habits: maintainability, null-safety, error handling, reviewability
• Experience with async API-driven UI: loading/error/empty states, retries, cancellation, and backend failure modes
• Hands-on performance profiling and optimization experience for UI on real devices
• Strong cross-functional collaboration skills with designers and product partners
• Clear, proactive communication across disciplines and levels; highly organized and able to help organize others

Nice to have

• Design-system-driven component libraries (theming, typography, spacing, token-driven approaches — i.e., a shared source of truth for design values)
• Deeper localization or accessibility expertise
• Analytics instrumentation experience (funnels, drop-off, task success)
• Cross-platform experience (desktop or VR)
• Comfort with modern developer tooling, including AI-assisted workflows, used responsibly
• Appreciation of puns (or at least the ability to groan at them)

This role is likely not a fit if

• Your Unity UI experience is primarily hobby/student/prototype work without production users
• Your background is mainly gameplay-focused with limited ownership of data-driven UI flows
• You haven’t owned performance or architecture decisions for UI in production
• You haven’t shipped Unity UI in a mobile context
• You prefer highly siloed execution over close collaboration with Design and Product
• You are unwilling to adopt modern development tooling practices, including responsible AI-assisted workflows

Benefits

• Equity compensation via stock options.
• Three weeks of paid vacation annually.
• 401(k) benefit.
• Health, dental, and vision plans.
• 100% remote.
• Hardware stipend.
• Annual learning & development stipend.
• Coworking membership stipend.
• Salary: $135,000