Hi I’m Harlen, a software engineer that specialises in both frontend development and UI/UX. I work professionally across web technologies and design software through Figma turning UX tested designs into real interactions on the web.

Harlen Postill

Hi I’m Harlen, a software engineer that specialises in both frontend development and UI/UX. I work professionally across web technologies and design software through Figma turning UX tested designs into real interactions on the web.

Available to hire

Hi I’m Harlen, a software engineer that specialises in both frontend development and UI/UX. I work professionally across web technologies and design software through Figma turning UX tested designs into real interactions on the web.

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Language

English
Fluent

Work Experience

Senior Software & UI Engineer at OneTeam Services
August 1, 2023 - April 30, 2026
Developed 6 production-ready apps across Web, iOS, Android and POS devices using React, React Native, and Jetpack Compose. Served major fintech and healthcare clients. Built and maintained REST API integrations across multiple client products; worked with Node.js backends and cloud-hosted services on Azure. Architected developer-ready design systems and automated handoff pipelines; published custom npm libraries enforcing design specs across frontend and teams. Led UI/UX across 3 concurrent projects, owning the full lifecycle from Figma prototype through CI/CD deployment to production on App Store and Google Play.
Associate Software Engineer at Centre for Social Justice & Inclusion (UTS)
February 1, 2024 - December 1, 2024
Built a full-stack TypeScript React Next.js web application Community Compass for the Ultimo area, in partnership with Uniting Health, connecting community members to local social services and support resources. Collaborated with a healthcare client to translate community needs into product requirements, delivering a production-ready application serving real users.
Lead Founding Engineer at Pantry Pal
July 1, 2024 - Present
Led end-to-end redesign and V2 launch of a cross-platform iOS and Android app within 12 months, owning frontend architecture, design system, and release pipeline. Established CI/CD workflows using Expo EAS Build, managing App Store and Google Play deployments with automated environment configuration. Integrated Supabase (PostgreSQL) backend with real-time data subscriptions and row-level security, alongside REST API consumption across the app.
Full-Stack Engineer (OneLink project) at OneTeam Technology
January 1, 2024 - March 1, 2026
Designed and built a production live React Native app for commuters in the Philippines to top up transit cards, track buses in real time, and use mobile devices as virtual cards via Host Card Emulation (HCE). Engineered a Node.js backend with Prisma ORM and PostgreSQL as the sole data source for the platform. Tracked live vehicle locations and served REST API requests across Web, Mobile, and POS clients. Hosted on Azure for scalability with Docker-based local development. Led frontend/backend architecture and cross-platform deployment.

Education

Bachelor of Software Engineering (Honours) at University of Technology Sydney
March 1, 2022 - December 1, 2026
Diploma in Professional Engineering Practice at University of Technology Sydney
January 11, 2030 - May 22, 2026

Qualifications

Bachelor of Software Engineering Honours
March 1, 2022 - December 1, 2026
Diploma in Professional Engineering Practice
January 11, 2030 - May 22, 2026

Industry Experience

Software & Internet, Financial Services, Healthcare, Professional Services