Senior Flutter Developer

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.