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I am a seasoned software developer with over 15 years of experience in mobile app development, complemented by 4 years of expertise in web applications and cloud/backend development. I have worked extensively across various industries and technologies, including iOS and Android development, GIS, contactless payment systems, AI machine learning, Salesforce integrations, and ecommerce platforms. I am result-oriented, highly self-motivated, and eager to continuously learn new technologies and methodologies. I excel in communication and teamwork, consistently receiving high performance evaluations for my analytical, problem-solving skills, quality control, and timely project delivery.…I am a seasoned software developer with over 15 years of experience in mobile app development, complemented by 4 years of expertise in web applications and cloud/backend development. I have worked extensively across various industries and technologies, including iOS and Android development, GIS, contactless payment systems, AI machine learning, Salesforce integrations, and ecommerce platforms. I am result-oriented, highly self-motivated, and eager to continuously learn new technologies and methodologies. I excel in communication and teamwork, consistently receiving high performance evaluations for my analytical, problem-solving skills, quality control, and timely project delivery.

Jingchun Liu

App Developer, Developer, Full Stack Developer, +1

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I am a seasoned software developer with over 15 years of experience in mobile app development, complemented by 4 years of expertise in web applications and cloud/backend development. I have worked extensively across various industries and technologies, including iOS and Android development, GIS, contactless payment systems, AI machine learning, Salesforce integrations, and ecommerce platforms. I am result-oriented, highly self-motivated, and eager to continuously learn new technologies and methodologies. I excel in communication and teamwork, consistently receiving high performance evaluations for my analytical, problem-solving skills, quality control, and timely project delivery.…I am a seasoned software developer with over 15 years of experience in mobile app development, complemented by 4 years of expertise in web applications and cloud/backend development. I have worked extensively across various industries and technologies, including iOS and Android development, GIS, contactless payment systems, AI machine learning, Salesforce integrations, and ecommerce platforms. I am result-oriented, highly self-motivated, and eager to continuously learn new technologies and methodologies. I excel in communication and teamwork, consistently receiving high performance evaluations for my analytical, problem-solving skills, quality control, and timely project delivery.

Available to hire

I am a seasoned software developer with over 15 years of experience in mobile app development, complemented by 4 years of expertise in web applications and cloud/backend development. I have worked extensively across various industries and technologies, including iOS and Android development, GIS, contactless payment systems, AI machine learning, Salesforce integrations, and ecommerce platforms.

I am result-oriented, highly self-motivated, and eager to continuously learn new technologies and methodologies. I excel in communication and teamwork, consistently receiving high performance evaluations for my analytical, problem-solving skills, quality control, and timely project delivery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Chinese

Advanced

Work Experience

Senior Software Developer, Mobile at TextNow

October 1, 2024 - Present

Developed and maintained iOS and Android codebases for a free calling and texting app focusing on trust and safety features to prevent fraud and spam. Created detailed project documentation including UI design, client-server diagrams, test plans, and release strategies. Collaborated with backend teams to troubleshoot and fix bugs and integration issues. Performed code reviews, managed App Store releases, crash monitoring, and supported the Android team during resource shortages. Successfully implemented major features like Email Verification and Identity Verification integrating gRPC and third-party APIs, using SwiftUI and Kotlin.

Software Developer, Mobile/Web/Backend at ATCO

October 1, 2024 - August 4, 2025

Led end-to-end development and release of multiple iOS and Android applications across various domains while contributing to web apps and Google Cloud Platform backends. Developed comprehensive unit and UI tests ensuring application stability. Participated in code reviews and architectural decisions. Delivered multiple projects including the Rumi E-commerce platform, inspection & work order management systems, power outage notification systems, logistics and task dispatch systems, energy analytics dashboard, and AI-powered mobile image classification apps integrating Salesforce, Firebase, Azure, and Vertex AI.

Software Developer, Mobile/Web at WSP Global

April 30, 2018 - August 4, 2025

Developed, maintained, and released iOS and Android applications and participated in web app development using AngularJS, C#, and MVC. Delivered three iOS/Android apps including office timesheet and GPS/location tracking applications integrated with Firebase, ERP APIs, and Microsoft Azure authentication. Implemented features such as object detection using iOS coreML and chatbot integration utilizing Google Assistant SDK.

Mobile Developer, iOS at Wireless Dynamic Inc.

September 30, 2012 - August 4, 2025

Developed and released iOS applications and library code to communicate with external hardware for contactless payment and online transactions for Visa Europe and Barclays Bank. Implemented contactless payment protocols using Objective-C and C++ to connect credit card secure elements with iPhone devices.

Software Developer, Mobile at Telecommunication System Inc.

April 30, 2012 - August 4, 2025

Developed native iOS and Android apps and hybrid cross-platform applications using PhoneGap/Cordova. Implemented GPS location services, geo-fencing, Facebook SDK integration, and social sharing features. Developed native plugins for GPS and SMS messaging on PhoneGap and low-level GPS provider drivers on Windows and Brew devices.

Blackberry Application Developer at Horizant

September 30, 2009 - August 4, 2025

Programmed Blackberry applications for enterprise property management including GPS integration, push messaging, and camera functionalities.

Mobile Game Developer at Magmic Games

February 28, 2009 - August 4, 2025

Developed and maintained mobile games for Java J2ME, Brew, and Windows Mobile platforms. Built the first Windows Mobile game engine with graphics, sound libraries, and collision detection. Published over 10 games across Blackberry and other mobile phones including titles like Guitar Hero and Texas Hold'em King 3.

Software Developer/Project Lead at Siemens Mobile China

April 30, 2006 - August 4, 2025

Led projects implementing Java virtual machine and API references, contributing to company intellectual property. Developed reference code for instant messaging, VoIP, and push-to-talk Java standards and adapted J2ME for embedded system integration including RTP and SIP protocols.

Software Developer at Mobicom Inc.

May 31, 2004 - August 4, 2025

Developed C++ and J2ME code for Java virtual machine implementation and testing on multiple mobile phone devices with a focus on network module re-implementation and Java application development.

Firmware Developer at Microcontroller Beijing Open Laboratory

June 30, 2003 - August 4, 2025

Developed and maintained firmware for embedded products, providing customer support for emulators, compilers, and TCP/IP stack libraries. Delivered smart home system remote control solutions using web servers, Java beans, and microcontroller I/O protocols. Implemented drivers for Bluetooth, SPI, I2C, and CAN-bus protocols as well as MOHON-JPEG video rendering software components.

Senior Software Developer, Mobile at TextNow

October 1, 2024 - Present

Developed, maintained, and released iOS and Android code for a free calling and texting app with a strong emphasis on trust and safety to prevent fraud and spam. Created detailed project documentation including requirements, UI design, client-server flow diagrams, implementation details, test plans, feature flag setup for A/B testing, and release strategies. Collaborated with backend teams to resolve bugs and integration issues. Performed code reviews and managed iOS app release process including App Store publishing and crash monitoring. Provided temporary support to Android team during resource shortages. Key accomplishments include implementing email verification using gRPC APIs, universal link handling for web and mobile, and identity verification integration via a third-party provider.

Software Developer, Mobile/Web/Backend at ATCO

October 1, 2024 - August 4, 2025

Led end-to-end development, maintenance, and release of iOS and Android applications alongside contributions to web applications and Google Cloud Platform backend services. Developed comprehensive unit and UI tests. Collaborated on architecture decisions and code reviews. Delivered five iOS apps and two Android apps across diverse domains. Key projects include Rumi e-commerce platform with location-based features, inspection and work order management system with offline data and mapping, power outage notification system with real-time location alerts, logistics task dispatch system involving real-time socket communication, renewable energy analytics dashboard using data pipelines into BigQuery, and an image classification app integrating Vertex AI machine learning models.

Software Developer, Mobile/Web at WSP Global

April 1, 2018 - August 4, 2025

Developed, maintained, and released iOS applications and participated in web app development. Released three iOS/Android apps to public app stores and enterprise environments. Built an office timesheet web app using AngularJS and MVC. Delivered the WSP Nexus iOS app leveraging React Native with Active Directory login, Firebase integration, and iOS CoreML SDK. Developed Field-Time Entry iOS app with ERP API integrations and security features like Touch ID. Created Focus-Locate app with advanced spatial database usage and map integration. Built Focus Journey Management iOS app with efficient GPS location tracking and multimedia reporting capabilities.

Mobile Developer, iOS at Wireless Dynamic Inc.

September 1, 2012 - August 4, 2025

Developed and maintained iOS applications and communication libraries for external hardware devices. Delivered Visa Europe and Barclays Bank iOS apps. Programmed Objective-C interfaces handling contactless payment protocols and online transactions, including implementing secure element communication between credit cards and iPhones.

Software Developer, Mobile at Telecommunication System Inc.

April 1, 2012 - August 4, 2025

Developed iOS and Android applications, including one Android app and one iOS app, and a proof of concept hybrid cross-platform app using PhoneGap/Cordova. Programmed Android apps integrating Bing Maps, Facebook SDK, GPS provider libraries, geo-fencing and location tracking. Developed native plugins for GPS and SMS functionalities in PhoneGap framework and implemented GPS provider drivers in C++ for Windows and Brew devices.

Blackberry Application Developer at Horizant

September 1, 2009 - August 4, 2025

Developed Blackberry applications for enterprise property management. Integrated GPS, push messaging, and camera functionalities on Blackberry devices using Java programming.

Mobile Game Developer at Magmic Games

February 1, 2009 - August 4, 2025

Developed and maintained mobile games for J2ME, Brew, and built the company's first game engine for Windows Mobile using C++. Delivered over 10 games, including three published for Blackberry and J2ME platforms. Responsibilities included graphics and sound library management, collision detection, animation process, UI implementation, game strategy and algorithms, sound mixer and multiplayer networking protocols.

Software Developer/Project Lead at Siemens Mobile China

April 1, 2006 - August 4, 2025

Led projects for Java virtual machine and API reference implementations including developing code and writing invention reports for company IP. Completed three Java Standard Reference implementations and passed public review. Developed reference code for JSR instant messaging, VoIP, push-to-talk protocols, including RTP and SIP protocol implementations and adapting J2ME class code for embedded systems.

Software Developer at Mobicom Inc.

May 1, 2004 - August 4, 2025

Developed C++ and J2ME code for Java virtual machine implementation and testing for mobile phone devices. Rewrote network modules for mobile OS and performed tests on Java virtual machine implementations.

Firmware Developer at Microcontroller Beijing Open Laboratory

June 1, 2003 - August 4, 2025

Developed and maintained firmware for products including smart home system controllers using web servers, Java Beans, TCP/IP stack, and microcontroller I/O control. Developed drivers for Bluetooth, SPI, I2C, and CAN-bus protocols. Provided customer support and troubleshooting for embedded system emulators and compilers. Completed development of Motion-JPEG video rendering software and device control Java Beans.