Engineering Manager · SleekFlow · Hong Kong
I lead engineering teams that turn complex product ideas into clear, durable software—across mobile, backend, and AI-enabled experiences.
Currently exploringFocus areas: Flutter mobile systems, C# platform services, AI-assisted delivery.Customer product
2,000+daily active users on the SleekFlow iOS and Android app.
Reliability
8% → 0.5%crash rate through stability-focused engineering and monitoring.
Performance
50%faster warm and cold app start time through targeted optimisation.
Delivery
66%less bug-triage time after introducing an AI-assisted QA workflow.
Technical terrain
A practical toolkit for designing systems that teams can understand, evolve, and own.
I use Flutter and Dart to build cross-platform mobile products that balance speed, reliability, and maintainability. My approach combines clear architecture, BLoC-based state management, dependency injection, observability, and performance-focused iteration so teams can ship confidently across iOS and Android.
I use C# and .NET to shape reliable backend services, APIs, and integrations that support long-term product development. I focus on clear service boundaries, maintainable application structure, predictable behaviour, and practical delivery workflows that make systems easier for teams to extend and operate.
I design practical AI-assisted workflows that connect product intent with real engineering work. By combining tools such as n8n, Claude Code, ClickUp, and Slack, I help teams reduce repetitive effort, preserve useful context, and handle problems in parallel while keeping clear boundaries, human oversight, and accountability in place.
Selected work
A few examples of turning product needs into more reliable experiences, clearer workflows, and maintainable technical foundations.
SaaS mobile product
Rebuilt a reliable Flutter foundation for messaging, contacts, broadcasts, and AI workflows across iOS and Android.
Impact: 2,000+ DAU, crash rate reduced from 8% to 0.5%, and app start time improved by 50%.
How I lead
Make the problem, trade-offs, and next decision legible so people can move with confidence.
Establish enough technical clarity to protect the product without slowing the team down.
Turn delivery into a stronger system—through feedback, ownership, and thoughtful engineering habits.
Experience
SleekFlow Technologies Limited
Lead Team MIT, a four-engineer remote team in Malaysia across the mobile apps, React-based internal tools, and backend services. Own sprint planning, 1-on-1s, reviews, hiring, mentoring, code review, and biweekly mobile releases while remaining hands-on in delivery.
SleekFlow Technologies Limited
Set technical direction for the Flutter/Dart app; strengthened error handling and observability, improved startup performance, and led architecture improvements using BLoC, Clean Architecture, and dependency injection.
SleekFlow Technologies Limited
Delivered production mobile features and fixes across messaging, contact management, broadcast, and SaaS collaboration workflows; partnered closely with QA for reliable biweekly releases.
Blue Insurance · 5gencare · Powerhouse Technologies
Built Flutter mobile apps, backend microservices, IoT integrations, public-facing fintech products, and cloud CI/CD pipelines across AWS and GitLab Runner.
Profile
I’m Leung Wing Chung, Jason—an Engineering Manager and staff-level mobile/full-stack engineer with 5+ years of experience across SaaS, fintech, insurance, IoT, mobile applications, internal tools, and cloud platforms.
My background in Flutter/Dart, C#/.NET, React/TypeScript, Azure, and CI/CD keeps me close to how software gets made. I’m especially interested in practical AI agents: workflows that reduce toil and help teams move with more clarity.