Available to hire
Hi, I’m Tezar Hlaing. I’m a senior iOS and mobile developer with 9+ years of experience designing, building, and deploying scalable apps for users in Singapore, the United Kingdom, and beyond. I specialize in Swift, SwiftUI, Objective-C, and React Native, with strong skills in software architecture, TDD, and performance optimization.
I love leading full product lifecycles from concept to App Store release, collaborating across teams, and applying clean architecture and modern design patterns to deliver high-quality experiences.
Skills
Work Experience
Mobile Developer (React Native & Java Backend, Freelance Project)
December 1, 2024 - PresentDeveloped a cross-platform barcode scanner app using React Native and AVFoundation for iOS. Built backend REST APIs with Java Spring Boot to manage product lookups and scan logs. Integrated real-time data synchronization and structured storage. The application name is 'T-Doc Scanner'.
Mobile Application Developer (iOS) at Naim Audio, UK
December 1, 2024 - August 7, 2025Built and maintained the Focal & Naim streaming app incorporating rich music metadata using Swift. Engineered a reusable core framework for music data and playback logic, reducing app latency and optimizing library performance by 30%. Responsible for managing CI/CD workflows with Bitrise and maintaining App Store releases.
Senior Mobile Application Developer (iOS) at SparkSystems, Singapore
October 1, 2022 - August 7, 2025Led architecture and performance tuning for a high-frequency trading app improving data processing latency by 30% and supporting concurrent users. Collaborated with business managers and stakeholders to ensure on-budget and risk-compliant feature delivery. Managed external vendor relationships and mentored junior engineers to enhance team productivity and code quality.
Assistant Principle Engineer (React Native) at Panasonic R&D Centre, Singapore
March 1, 2021 - August 7, 2025Developed a new Smart Home IoT app using React Native for iOS and Android with native Swift modules. Worked in a scrum team to integrate backend APIs and real-time sensor data. Conducted code reviews to maintain software architecture standards and ensure high-quality codebase.
Mobile Application Developer (iOS) at PCCW Solution, Singapore
September 1, 2019 - August 7, 2025Designed and developed the Singapore Government Smart Nation mobile app featuring real-time location tracking, live chat, and location-based municipal issue reporting. Led end-to-end feature releases including front-end and back-end development, ensuring 99.9% uptime. Collaborated closely with scrum team members, architects, product managers, and stakeholders for timely feature rollouts. App name: OneService.
Mobile Application Developer (iOS) at ComfortDelgro, Singapore
December 1, 2018 - August 7, 2025Implemented ComfortDelgro taxi booking system incorporating job bid functionality, bus-sharing, and taxi booking services. Developed live driver tracking features reducing idle time by approximately 15%. Coordinated with vendors and in-house teams to integrate booking notifications and core system functionalities. Projects include OurBus (Australia) and Swan Taxi System.
System Analysis Developer (iOS/Android) at Phillip Securities, Singapore
September 1, 2017 - August 7, 2025Developed POEMS SG trading app supporting global markets with real-time stock charting, alerts, and push notifications. Created backend APIs utilizing Java J2EE, SOAP, and REST. App name: POEMS SG.
Freelance Software Developer (React Native & Java Backend) at Freelance
December 1, 2024 - PresentDeveloped cross-platform barcode scanner using React Native + AVFoundation, deployed on iOS. Built backend REST APIs using Java Spring Boot to handle product lookups and scan logs. Integrated real-time data sync and structured storage.
Mobile Application Developer (iOS) at Naim Audio
June 1, 2023 - December 1, 2024Built and maintained Focal & Naim streaming app with rich music metadata using Swift. Engineered reusable core framework for music data and playback logic. Reduced app latency and optimized library performance by 30%. Rebuilt core iOS framework using Swift protocols and generics; integrated Firebase Analytics for feature tracking. Owned CI/CD with Bitrise, maintained App Store releases.
Senior Mobile Application Developer (iOS) at SparkSystems
March 1, 2021 - October 1, 2022Led architecture and performance tuning for high-frequency trading app, improving data processing latency by 30% and supporting concurrent users. Collaborated closely with business managers and stakeholders to ensure features were delivered within budget and risk frameworks. Managed external vendor relationships and mentored junior engineers, contributing to team efficiency and code quality.
Principal Engineer at Panasonic R&D Centre
September 1, 2019 - March 1, 2021Responsible for the development from scratch of a new iOS app for in-house IoT Smart Home Applications. Developed hybrid mobile application for iOS and Android by using React-Native. Performed code reviews to maintain and control software architecture and quality. Collaborated with the scrum team, backend developers and business managers to develop new features consistent with product roadmap.
Mobile Application Developer (iOS) at PCCW Solution
December 1, 2018 - September 1, 2019Designed and developed the Singapore Government Smart Nation initiative mobile app that includes real-time location tracking, live-chat and location-based municipal issues reporting system. Led feature releases end-to-end (frontend/backend), ensuring 99.9% uptime. Collaborated with the scrum team, solution architect, product managers and stakeholders to release the new feature in timely manner.
App Developer (iOS) at ComfortDelgro
September 1, 2017 - December 1, 2018Implemented ComfortDelgro taxi booking including job bid functionality, bus-sharing and taxi booking services. Implemented live driver tracking reducing idle time by ~15%. Liaised with vendors and in-house development team to integrate immediate booking notification and cores system.
Analysis Developer (iOS/Android) at Phillip Securities
April 1, 2015 - September 1, 2017Developed the international stock exchanges mobile app (iOS/Android) with access to multiple markets using trading charts, push notifications, and a robust SDLC. Built backend API for the app from scratch using J2EE, Maven, WebLogic, SOAP, RESTful, and stored procedures with emphasis on code quality.
Education
M.Tech. in Software Engineering at National University of Singapore
January 11, 2030 - August 7, 2025B.Sc. (Hons) in Computer Science at University of Computer Studies, Yangon
January 11, 2030 - August 7, 2025M.Tech. in Software Engineering at National University of Singapore
January 11, 2030 - February 3, 2026B.Sc. (Hons) in Computer Science at University of Computer Studies, Yangon
January 11, 2030 - February 3, 2026Qualifications
Industry Experience
Financial Services, Media & Entertainment, Government, Software & Internet, Consumer Goods, Telecommunications, Professional Services, Education
Skills
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