Robert Tessler

• Digital consultancy providing software services and development of original products • Engineered a Python/FastAPI AI image processing service. • Deployment of containerized services. Tech: AWS Lambda, S3, IAM, ECS, Docker and Kubernetes. • Developed a offline music player mobile app. Tech: Swift / SwiftUI, Android Kotlin, Jetpack Compose, BLE, MVVM. • Text to 3D model generation. Tech: RAG pipelines, Langchain, LLM integration, Claude, Gemini, ChatGPT.. • Frontend development in React.js, Vue.js, Typescript, OpenGL, QGIS, Three.js and Unity for interactive data visualisation.

• Architected a SaaS crypto currency trading platform for managing client trades and assets. Tech: React.js, Next.js, TypeScript, Supabase backend API development, Postgres, Tailwind and ApexCharts. • Streamlined the client signup workflow, reducing friction and improving conversion into active traders. • Built secure admin tooling that gave operations staff real-time visibility and control over order monitoring and processing, reducing manual oversight effort. • Designed intuitive data visualizations giving clients clear, real-time insight into their asset values and portfolio performance. • Increased platform engagement and trust by introducing real-time buy/sell notifications and in-app messaging, keeping users informed and connected. • Established a reliable, automated deployment pipeline, enabling faster and safer releases to production. Tech: GitLab pipelines, docker and Vercel.

• Improved reliability and performance of the QC One inspection app, used daily by 18,000 active users, by overhauling network data synchronization to reduce sync failures and delays. Tech: React Native, Typescript, MobX, Realm DB, Sentry logging, Jest unit / integration testing • Strengthened app stability and performance through improved state management, offline data storage, and proactive error monitoring. • Boosted rendering performance to deliver a smoother, more responsive experience for field users, and improved release confidence through comprehensive automated testing. • Cut download and sync times for the Tessa Android app, improving experience. Tech: Kotlin, Java, GraphQL, Coroutines, Flow, Room DB, Retrofit, Hilt, MVVM, Jetpack Compose and Clean Architecture • Streamlined release management by automating build, testing, and deployment pipelines, enabling faster and more reliable releases to Apple and Google Play app stores. Tech: GitHub actions CI/CD and Fastlane • Led a research initiative into selective noise cancelling technology, exploring its feasibility and application for future product features. Tech: Python, FastAPI • Built an energy usage calculator for the energy sector, translating complex consumption algorithms into an accessible, user-facing tool. Tech: Kotlin

• Led development of a cross-platform music streaming app that let users seamlessly share and sync playlists between Apple Music and Spotify — bridging two previously incompatible ecosystems. Tech: Swift, SwiftUI, Kotlin, Flutter, Firebase / GCP • Designed an intelligent song-matching algorithm using cosine similarity to accurately map tracks between platforms, solving a core technical challenge that made crossservice playlist sharing possible. • Delivered a polished, native-quality experience across iOS and Android, ensuring smooth audio playback regardless of platform. • Enhanced user engagement by building real-time notifications, in-app chat, and live updates, turning a utility app into a social experience. • Owned the product experience end-to-end — from Figma UI/UX design through to app store deployment and secure OAuth2-based account linking. • Built and scaled the backend infrastructure supporting user data, image uploads, and cron scheduled background jobs, ensuring reliable performance as the user base grew. Tech Firebase / GCP, NoSQL database, Node / Express, Javascript, Python, OAuth, Google Vision API for image classification. • Created an internal admin portal giving the team visibility into user activity and playlist generation, supporting data-driven product decisions. Tech: React.js

Improved the KNAB banking app onboarding flow to make signup simpler and increase client registration numbers. Use of IOS Swift, UIKit, Core Data, Reactive Programming, MVVM, OOP.

• Developed a mobile Flutter app and admin web site in React.js / Redux for Marine Rescue NSW for reporting marine hazards in coastal waters. MRNSW Risk App. • Created an IOS Swift app and React.js web app for Pepsi Cola Taste Challenge. • Deployed to IOS and Android app stores • API development in Firebase / GCP utilising Node.js, Express.js, Typescript and Python. Image upload, OAuth2 authentication, PDF generation. • Did maintenance of the APTC Fiji technical college website. Tech: NET Core, C#, ASP.NET, .NET MVC, HTML, CSS, SASS and Sitefinity CMS. • Implemented automated data processing and data upload into a Hubspot CMS for Crescent Wealth. Tech: Python, Pandas, shell scripts, Java, Spring Boot, Maven, Redis, Kafka messaging and AWS.

Built an online hearing test web app for Cochlear for users to assess their hearing at home and let Cochlear identify new customers. • Frontend development in React.js, Javascript, Bootstrap, Marketo and Salesforce REST APIs with Unit and integration testing in Jest.js. • Developed a Node.js, Express.js REST API hosted on AWS for Toyota. JSON upload of car options from Toyota store kiosks. Use AWS S3, Lambda and API Gateway.

Developeed a Relationship Access Manager system for the Australian Tax Office. The system allows companies that offer tax services to register with the ATO. Coding in Angular, RxJS, MongoDB, Jasmine.js, Agile, Typescript and Bootstrap.

Developed a Relationship Access Manager system for the Australian Tax Office. The system allows companies that offer tax services to register with the ATO. Coding in Angular, RxJS, MongoDB, Jasmine.js, Agile, Typescript and Bootstrap.

Created a web app for displaying advertising video, print and radio components and analytics for advertising campaigns. Use of JavaScript, Angular, jQuery, HTML, CSS. • Backend development using Java, Spring Boot, MySQL, AWS. • Developed an interactive web page builder linked to ad data for client presentations • Created a web app for the Seven network to display advertisement spot pricing.

Development and maintenance of multiple ASP.NET sites. Coding in Kentico CMS and .NET C#. Updated the wool.au website using Java, J2EE, Spring and WebSphere.

Created a derivatives trading desktop app using GNU C++. The system did automatic opportunity spotting and trading. Improved the productivity of traders around the world.