Senior Windows Developer

ReFlow; Toronto; On-site; CAD 90,000 - 150,000; Full time

Job summary

Reflow is seeking an experienced Windows app developer to own the Windows desktop experience, focusing on performance, stability, and deployment across enterprise environments. You will profile and optimize for speed and memory, build for managed deployments, and collaborate with backend and platform teams to ensure consistent experiences.

You’ll contribute to app architecture, testing, and release processes, supporting smooth updates and scalable growth.

Qualifications

• Experience building Windows desktop apps with C# in enterprise environments.
• Familiarity with performance profiling and debugging.
• Experience with enterprise deployment (MDM) environments.
• Ability to collaborate across teams and services.

Responsibilities

• Develop Windows apps focusing on performance and stability.
• Profile, debug, optimize memory and speed.
• Integrate with backend APIs and adjust endpoints as needed.
• Collaborate to ensure cross-platform consistency.
• Contribute to architecture, testing, and release processes.

Skills

C#

Windows apps

Profiling

APIs

Tools

Avalonia UI

WPF

UWP

WinUI

Job description

We’re building Reflow, a workforce and workflow intelligence platform that helps teams understand and improve how work gets done. Our Windows app is critical to capturing performance data and enabling insights across enterprise environments. We’re looking for an experienced Windows app developer to take ownership of development, stability, and deployment, working to scale the platform.

What you’ll do

• Execute Windows app development with a focus on performance, maintainability, and cross-environment stability.

• Profile, debug, and optimize for speed, memory usage, and reliability.

• Build for managed and restricted enterprise environments using MDM tools and deployment best practices.

• Integrate with backend APIs, and optionally, implement or adjust backend endpoints when needed.

• Collaborate with other developers to ensure consistent experiences across platforms.

• Contribute to app architecture, testing, and release processes to ensure smooth updates and deployments.

Who you are

• Proficient in C# with hands-on experience in Windows app development (Avalonia UI, WPF, UWP, or WinUI).

• Skilled at profiling, debugging, and performance optimization.

• Experienced in enterprise-managed or MDM-deployed app environments.

• Comfortable working with APIs and understanding full-stack communication.

• Detail-oriented, you care about consistency, reliability, and smooth user experiences across setups.

Bonus points

• Experience with cross-platform or Electron-based apps.

• Understanding of Django or other backend frameworks and API design.

• Familiarity with security compliance and enterprise privacy standards.

• Experience with CI/CD pipelines and automated testing for Windows apps.

Why join

You’ll own a key product surface, the Windows app that powers Reflow’s data collection and user insights. You’ll work closely with the core team, improving performance, reliability, and the developer experience across platforms. This role is ideal for someone who wants to combine craftsmanship with real impact.

We’re open to contractors and full-time employment. High trust, high speed, and high impact. If you love owning a product end-to-end and optimizing at every level, you’ll fit right in.

Compensation:

We offer competitive pay based on the market and where you’re located. The salary ranges in our job postings are intentionally wide because they need to cover both U.S. and international candidates. Our final offer will depend on things like your experience, skill set, and location.