Senior Flutter Developer
Location: Remote
Contract: PJ (full-time)
Level: Senior
We’re building a virtual office platform for remote and hybrid teams. It brings together persistent rooms, real-time presence, audio/video (WebRTC), chat, screen sharing, collaborative boards, and immersive spaces to boost connection, productivity, and team cohesion — all in one place.
The Role
We’re looking for a Senior Flutter Developer focused on macOS Desktop to build and evolve our desktop client. You’ll ship a high-performance, stable, and well-instrumented app that integrates video/audio, real-time features, and collaborative tools—while keeping top-tier code quality, testing, and documentation.
Secondary scope: help maintain Android and iOS builds (feature parity, fixes, and releases).
What You’ll Do
* Design, build, and maintain the Flutter macOS app with clean architecture, modular layers, and reliable state management.
* Integrate RESTful APIs and real-time services (e.G., WebSockets/Streams).
* Implement A/V features (e.G., flutter_webrtc): device selection, camera/mic permissions, I/O routing, and stability under variable networks.
* Ensure observability end to end: instrument product events/metrics;
triage errors with Sentry;
capture UX signals withMicrosoft Clarity (session replay/heatmaps) where applicable (web/embedded views);
analyze performance traces and dashboards.
* Own quality: unit, widget, and integration tests;
CI checks;
code reviews;
technical docs.
* Handle macOS distribution: code signing & notarization, entitlements, Hardened Runtime, App Sandbox, Keychain;
package DMG/PKG;
manage auto-update (e.G., Sparkle).
* Collaborate with Product/Design/QA to refine requirements, edge cases, and acceptance criteria;
keep specs tidy in Confluence and PRs clear.
* Team rituals & reporting:
* Attend daily standups in English and other ceremonies (planning, grooming, demos, retros).
* Keep Jira up to date (status, links, attachments) and log time entries (work logs) per task.
* Submit an end-of-day (EOD) daily report in English including: hours worked (per task), what was completed, current task & ETA, blockers, and plan for tomorrow.
* Secondary (Android & iOS): maintain parity when applicable, fix platform-specific issues, help with CI/CD and store releases, monitor crashes/perf via Sentry and review UX insights with Clarity when relevant.
CPU & GPU Optimizations (primary focus)
CPU
* Minimize rebuilds: effective state selection (BLoC/Riverpod/Provider), const constructors, proper Keys, split large widgets.
* Cut redundant layout/work: avoid heavy logic in build, cache computed values, reduce intrinsic measurements, coalesce events, debounce/throttle streams.
* Move heavy tasks off the UI thread: isolates (compute/custom), lazy JSON parsing, incremental work units.
* Frame scheduling discipline: prevent setState loops;
render only when state actually changes.
GPU
* Reduce overdraw/repaints: place RepaintBoundary wisely;
optimize CustomPainter (shouldRepaint);
avoid large Opacity on complex subtrees.
* Avoid expensive effects: minimize saveLayer, heavy blurs/gradients and big shadows.
* Use right-sized images & filterQuality (low/none when acceptable);
limit transforms on large layers.
* Shader jank control: warm up shaders / capture SkSL where applicable;
keep fragment shaders simple.
* Pause/disable animations when off-screen;
keep animation count/area minimal.
Measurement & Guardrails:
* Profile with Flutter DevTools (CPU/GPU/frame timeline) and add perf budgets (avg CPU%/GPU frame time) to CI gates.
* Track before/after metrics per feature;
regressions must be fixed before release.
Must-Haves
* Fluent English (spoken and written): comfortable in daily English standups and writing EOD reports.
* Strong experience with Flutter and Dart building Desktop apps (preferably macOS).
* Proven work reducing CPU/GPU usage in Flutter apps (ideally desktop/macOS) with measurable before/after results.
* Solid grasp of architectural patterns (MVC/MVVM/Clean), DI, and state management (BLoC/Riverpod/Provider).
* Hands-on with RESTful APIs, WebSockets/Streams, async/isolates, and robust error handling.
* Firebase (Auth, Firestore, Analytics) or equivalent, Microsoft Clarity (for UX/session insights in web-embedded contexts), and Sentry for error/performance monitoring.
* Git proficiency, code reviews, CI (e.G., GitHub Actions/GitLab CI), and Jira work logs/time tracking.
Nice to Have
* Deep macOS expertise: signing, notarization, App Sandbox, entitlements, Keychain, packaging, and updater pipelines.
* Practical WebRTC experience;
spatial audio;
jitter/latency tuning.
* Android/iOS publishing (fastlane or equivalent), push notifications, and in-app review flows.
* Docker, CDN, and networking basics for real-time apps.
* Accessibility (VoiceOver/TalkBack) and internationalization.
Benefits & Environment
* Remote-first, flexible hours, and competitive market range.
* Fast feedback loops, ownership, and a product with real impact on how teams work every day.
* Support for learning, events, and continuous improvement.