Hans Chan
Full-Stack Developer
Shenzhen
Summary
Seasoned Full-Stack Software Engineer with over 10 years of experience building, scaling, and leading development of more than 100 web and mobile applications across diverse industries - including mapping, logistics, social media, and smart home automation. Adept at collaborating with cross-functional teams, mentoring developers, and delivering clean, maintainable, and high-performance code. Skilled in both frontend and backend development, cloud services, and agile delivery.
Overview
15
15
years of professional experience
Work History
Lead Full-Stack Developer
KHDev
05.2022 - Current
- Built tons of applications for small/mid-sized companies and individual customers.
- Led a team of professional software developers.
- Delivered qualified web, mobile, and AI products.
Full-Stack Software Developer
Freelance
05.2011 - Current
- Delivered 100+ production-ready web, mobile, and backend applications for startups and established businesses.
- Designed scalable system architectures, reusable components, and clean APIs across multiple industries.
- Worked directly with founders, designers, and product teams to turn ideas into reliable, user-focused software.
Senior Mobile Developer
Sesh Women Fitness
06.2025 - 11.2025
- Collaborated with a high-performing engineering team to deliver major updates across iOS and Android applications.
- Led a full refresh of the app’s design system to improve usability, accessibility, and visual consistency.
- Enhanced core workout features to improve performance, scalability, and long-term maintainability.
- Integrated Superwall for paywall management, Stripe for subscription payments, and personalized workout algorithms based on user goals and fitness levels.
- Managed features from design through deployment, ensuring a smooth user experience and high-quality code.
- Worked closely with the design team to maintain consistent use of the design system across the application.
Lead Software Developer
KrackWins
12.2023 - 08.2025
- Led end-to-end development of the KrackWins platform with a high-performing engineering team.
- Built and shipped the full public website, admin panel, backend APIs, and iOS and Android applications.
- Improved system performance and reliability, contributing to a stronger user experience and revenue growth.
Full-Stack Software Developer
TroutRoutes / OnX
04.2024 - 05.2025
- Worked closely with TroutRoutes and OnX engineering teams to enhance web and Android mapping applications.
- Upgraded MapView functionality, including map interactions, tagging, route drawing, and custom markers.
- Introduced a new authentication system and integrated Stripe for payments.
- Resolved critical bugs and optimized map-based features for performance and stability.
Lead Mobile Developer
CheckSammy
06.2024 - 01.2025
- Built the entire CheckSammy mobile platform from scratch for iOS and Android.
- Worked closely with PrimeAI, CheckSammy product teams, and backend engineers to deliver production-ready applications.
- Architected scalable mobile codebases and shipped fully functional apps to production.
Software Developer
Rebound Dynamics
02.2023 - 05.2024
- Built internal mobile applications used by local warehouse teams to support daily operations.
- Implemented features for inventory tracking, workflow efficiency, and logistics support.
- Collaborated with internal teams to align mobile tools with operational requirements.
Lead Software Developer
ELK Products
10.2021 - 01.2024
- Built full-featured iOS and Android applications for home and business automation systems.
- Developed software supporting security cameras, Z-Wave devices, alarms, lighting, garage doors, panels, and controllers.
- Worked closely with an experienced internal team and was promoted to Lead Engineer based on technical leadership and delivery.
Lead Mobile Developer
Hive Social
10.2019 - 05.2021
- Built the Hive Social mobile application from the ground up as the sole mobile developer.
- Worked directly with CEO Kassandra Pop and the design team to shape the product vision and execution.
- Scaled the app to 2M+ users, including a viral surge of 200K+ users in a single night.
- Reached top App Store rankings, temporarily surpassing Facebook during peak growth.
Senior Software Developer
POD.io
06.2019 - 09.2019
- Worked with a distributed European engineering team on a large-scale, LinkedIn-like social platform.
- Contributed to iOS and Android mobile applications serving millions of users.
- Improved app performance, reliability, and API communication under tight timelines.
Lead Software Developer
IntelliBrush
09.2018 - 01.2019
- Built native iOS and Android applications for e-brush hardware using BLE communication.
- Implemented real-time brush handling, device connectivity, and performance-optimized rendering.
Software Developer
EPLAN P8
11.2013 - 06.2016
- Developed AutoCAD-integrated applications supporting electrical engineering workflows.
- Enhanced drawing tools, automation features, and system integrations in a professional engineering environment.
Education
Bachelor of Science - Computer Engineering
Beijing University of Technology
Skills
- Swift
- Kotlin
- JavaScript
- TypeScript
- Python
- C#
- Java
- Objective-C
- React
- React Native
- Angular
- Nodejs
- NET
- Django
- Express
- SwiftUI
- IOS
- Android
- Flutter
- AWS
- Firebase
- Azure
- Docker
- CI/CD
- GitHub Actions
- PostgreSQL
- MySQL
- MongoDB
- SQLite
- Jira
- Xcode
- Visual Studio
- Cursor
- Android Studio
- Visual Studio Code
- Figma
- Git
- Bitbucket
- REST APIs
- GraphQL
- WebSockets
- Microservices Architecture
- Agile
- Scrum
Websites
Additional Highlights
- Proven ability to deliver production-ready software under tight timelines.
- Experienced working in remote, cross-functional teams.
- Strong focus on code quality, testing, and performance optimization.
- Passionate about building scalable, user-centric applications.
Timeline
Senior Mobile Developer
Sesh Women Fitness
06.2025 - 11.2025
Lead Mobile Developer
CheckSammy
06.2024 - 01.2025
Full-Stack Software Developer
TroutRoutes / OnX
04.2024 - 05.2025
Lead Software Developer
KrackWins
12.2023 - 08.2025
Software Developer
Rebound Dynamics
02.2023 - 05.2024
Lead Full-Stack Developer
KHDev
05.2022 - Current
Lead Software Developer
ELK Products
10.2021 - 01.2024
Lead Mobile Developer
Hive Social
10.2019 - 05.2021
Senior Software Developer
POD.io
06.2019 - 09.2019
Lead Software Developer
IntelliBrush
09.2018 - 01.2019
Software Developer
EPLAN P8
11.2013 - 06.2016
Full-Stack Software Developer
Freelance
05.2011 - Current
Bachelor of Science - Computer Engineering
Beijing University of Technology