Senior Software Engineer – Full-Stack (.NET, React + Native Apps) – Remote

Calance; United States; Remote; USD 120,000 - 150,000; Full time

Job summary

Calance is seeking a Senior engineer who excels in C#/.NET and React/TypeScript, with hands‑on experience across backend, web, and client platforms. You have shipped native or cross‑platform apps on living‑room platforms and are comfortable engaging across multiple stacks in a single sprint.

You will build features across backend (.NET), web (React/TypeScript), and client platforms, shaping shared architecture and integrating with APIs, auth, telemetry, and media playback.

Qualifications

• Shipped native or cross‑platform apps on living‑room platforms.
• Experience building for web and backend with REST APIs and authentication.
• Proficient across backend, web, and client stacks.

Responsibilities

• Build and ship features across backend (.NET), web (React/TypeScript), and client platforms.
• Contribute to shared architecture so web, mobile, and CTV are not separate codebases.
• Integrate clients with REST APIs, auth, cloud services, telemetry, and media playback.
• Debug hard client issues like app lifecycle, memory, and device fragmentation.
• Help decide when to use native SDK, cross‑platform framework, or web‑based app.

Skills

C#/.NET

React/TypeScript

Multiplatform shipping

Tools

REST APIs

Cloud services

Job description

The Role

This role exists to make that real: shared platform components, native or cross-platform clients, and the glue to our APIs, auth, telemetry, and playback stack.

You are a Senior engineer who is dangerous on C#/.NET and React, and who has actually shipped at least one native or living-room platform, not only responsive web.

What You Will Do

• Build and ship features across backend (.NET), web (React/TypeScript), and one or more client platforms.
• Contribute to shared application architecture so web, mobile, and CTV are not three unrelated codebases.
• Integrate clients with REST APIs, auth, cloud services, telemetry, device APIs, and media playback.
• Debug the hard client problems: app lifecycle, memory, focremote navigation, fragmented device behavior, and playback edge cases.
• Help the team choose where a native SDK, a cross-platform framework, or a web-based app is the right tool.

Required Experience

• Senior-level C#/.NET and strong hands-on React/TypeScript web development. You can contribute on both sides of an API in the same sprint.
• Shipped native or cross-platform applications on at least one of: Android (Kotlin/Java), iOS (Swift), .NET MAUI/Xamarin, React Native, Tizen, Roku / BrightScript, tvOS, or similar living-room platforms. Shipping means store or production release, not a sample app.
• Building clients that talk to real backends: REST APIs, authentication/authorization, cloud services, telemetry, device capabilities, and media playback.
• Practical multi-platform engineering: platform SDKs, application lifecycle, networking, performance and memory constraints, deployment, compatibility, and device debugging.
• Comfort working across backend, web, and client stacks without needing a translator.

Strongly Preferred

• Connected TV (Roku, Fire TV, Tizen, webOS, tvOS, Android TV). CTV constraints are different from mobile, and this is high-value for us.
• Media playback on-device (ExoPlayer, AVPlayer, Roku Video, HLS/DASH players) and the issues that come with it: buffering, DRM, live latency, captions.
• .NET MAUI or a shared C# client architecture.
• App-store / manufacturer certification experience (Roku, Samsung, Amazon, Apple).

Nice To Have

• BrightScript/Roku channel development.
• In-app purchase, entitlements, or SVOD/AVOD client flows.
• Experience with a write once, certify many SDK model.

This role IS a fit if..

You have a production app on a non-web platform, you can talk about remote-control UX or device fragmentation without flinching, and you still enjoy writing .NET and React.

This role IS NOT a fit if..

You are web-only, or a mobile specialist with no interest in backend/web, or you have only wrapped a WebView and called it a native app