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Oana Goge
Verified Expert in Engineering
API Integration Developer
Helsingør, Denmark
Toptal member since June 17, 2015
Bio
Oana is a senior back-end engineer and systems architect with 7+ years of experience in ASP.NET Core, Node.js, and Azure. She has built and maintained enterprise healthcare platforms for 190+ clients with 99.9%+ uptime, integrating 35+ external services, including AI/ML, payment, and communication systems. Retained by a client for seven years, Oana led full-stack teams and specializes in HIPAA-compliant architectures, AI integration, and cloud-native solutions.
Portfolio
HIA Technologies Inc.
ASP.NET Core, ASP.NET Core 8, Azure, Azure SQL, Azure Cosmos DB, Unity...
FireFun Games
Construct 2, Tumult Hype, HTML5, Unity, Apps, Agile Software Development...
Lucus Aps
Unity, Back-end, Apps, Agile Software Development, Unity3D, C#, Android, iOS...
Experience
- API Integration - 7 years
- ASP.NET Core - 5 years
- Azure Functions - 5 years
- Azure Cosmos DB - 5 years
- Azure - 5 years
- Back-end Development - 5 years
- AI Integration - 5 years
- System Architecture - 5 years
Preferred Environment
ASP.NET Core, ASP.NET Core 8, Azure, Azure SQL, Azure Cosmos DB, Azure Functions, Azure Blob Storage, REST APIs, AI Integration, Artificial Intelligence (AI)
The most amazing...
...product I've led was a healthcare platform serving 190+ clients, including WebMD, with 99.9% uptime over seven years, for AI-powered patient education.
Work Experience
Principal Software Engineer (Contract)
2018 - 2025
HIA Technologies Inc.
- Led back-end architecture for a HIPAA-compliant healthcare platform serving clients from solo practices to WebMD with 99.9%+ uptime over six years.
- Integrated 35+ APIs, cloud services, and data stores across AI/ML, payments, communications, and media workflows.
- Designed a multi-system architecture managing 6TB+ of healthcare media in Azure Storage across SQL Server, Cosmos DB, and Azure Functions.
- Implemented application-level AES encryption for selected sensitive fields in Cosmos DB as part of the platform's HIPAA security controls.
- Orchestrated zero-downtime data migrations affecting 58,000+ media assets across production environments.
- Built and operated the back end for interactive, voice-enabled patient education, including content delivery, session management, and analytics.
- Designed and iterated detailed Cosmos DB-backed analytics for interactive sessions and debugged complex issues in Pinecone-backed retrieval.
- Owned and led architecture for the vast majority of a 400,000+ line, multi-repository full-stack codebase, including CI/CD, Application Insights, xUnit, and Cypress.
Technologies: ASP.NET Core, ASP.NET Core 8, Azure, Azure SQL, Azure Cosmos DB, Unity, Azure Functions, Node.js, Azure DevOps, Git, C#, REST APIs, Back-end, Back-end APIs, Back-end Development, System Architecture, Google API, Google APIs, Google Drive API, Google Sheets API, Angular, Vue, Azure PaaS, ElevenLabs Solutions, AI Agents, Agentic AI, Python, Artificial Intelligence (AI), Retrieval-augmented Generation (RAG), Vector Databases, Pinecone, AI Integration, AI Model Integration, OpenAI API, Swagger, TypeScript, .NET, Speech-to-Text (STT), Azure Text to Speech, Text-to-Speech (TTS), Minimum Viable Product (MVP), Full-stack, Azure Cognitive Services, Google Speech API, Whisper, Google Speech-to-Text, Stripe, Stripe API, Web Development, API Integration, Software as a Service (SaaS), ChatGPT, Large Language Models (LLMs), Data Analytics, Agile Software Development, Unity3D, JavaScript, SQL, Object-oriented Programming (OOP), MacOS, Audacity, Entity Framework Core, HIPAA Compliance, Azure Blobs, Three.js, Amazon Polly, IBM Watson Speech to Text, General Data Protection Regulation (GDPR), Express.js, Mobile Development, Leadership, Windows, CSS3, CSS, SourceTree, Postman, Google Cloud, Amazon Web Services (AWS), .NET Core, Microsoft SQL Server, HTML, APIs, Healthcare Software, MVC Razor, SaaS, Cursor AI, Claude, Gemini API, GitHub Copilot Chat, DevOps, NoSQL, Full-stack Development, Generative Artificial Intelligence (GenAI), Prompt Engineering, CSV File Processing, Email Automation, Analytics, Dashboards, React, QR Codes, Solution Architecture, SDKs, CI/CD Pipelines, OAuth, Google Cloud Platform (GCP)
Software Engineer
2014 - 2018
FireFun Games
- Helped drive a mobile game to achieve 5+ million downloads on Google Play by implementing multiplayer networking for 100v100 unit battles with real-time synchronization and PlayFab back-end integration.
- Developed interactive educational platforms for enterprise clients, including Siemens, creating physics simulations, animated learning experiences, and 24+ educational minigames delivered within tight deadlines.
- Built cross-platform web applications using HTML5 Canvas, advanced animation systems, and custom physics engines for educational and entertainment clients.
- Designed multiplayer architectures and real-time systems for gaming platforms, handling complex state synchronization and network optimization challenges.
Technologies: Construct 2, Tumult Hype, HTML5, Unity, Apps, Agile Software Development, Unity3D, C#, Android, iOS, JavaScript, Git, HTML5 Canvas, Xcode, Object-oriented Programming (OOP), MacOS, Audacity, System Architecture, Minimum Viable Product (MVP), Web Development, API Integration, Software as a Service (SaaS), ChatGPT, Large Language Models (LLMs), Next.js, Supabase, Supabase Auth, Vercel, MailerSend, SMS, Tailwind CSS, General Data Protection Regulation (GDPR), Canvas, Physics Simulations, Educational Games, Mobile Development, Multiplayer, Photon, Windows, CSS3, CSS, SourceTree, Inkscape, Postman, HTML, APIs, SaaS, PostgreSQL, Cursor AI, Claude, Gemini API, GitHub Copilot Chat, WordPress, Full-stack Development, Generative Artificial Intelligence (GenAI), Prompt Engineering, CSV File Processing, Zapier, Email Automation, Analytics, Dashboards, React, QR Codes, Solution Architecture, Search Engine Optimization (SEO), SDKs, CI/CD Pipelines, OAuth
Lead Developer
2016 - 2016
Lucus Aps
- Led a development team of 4-5 developers, including full-time staff and interns, managing educational game projects for Danish schools with hands-on mentoring and technical guidance.
- Architected a custom multiplayer networking system for classroom-based games, handling real-time market simulation, state synchronization, and automatic reconnection in unstable school network environments.
- Developed a location-based mobile application using GPS proximity detection for Copenhagen tourism, debugging complex geolocation algorithms and improving system performance.
- Implemented real-time economic simulation with dynamic pricing that responded to student actions across multiple connected devices, creating engaging educational gameplay mechanics.
Technologies: Unity, Back-end, Apps, Agile Software Development, Unity3D, C#, Android, iOS, Git, Xcode, Object-oriented Programming (OOP), MacOS, Back-end Development, Back-end APIs, System Architecture, Minimum Viable Product (MVP), Full-stack, Educational Games, Mobile Development, Multiplayer, Leadership, Windows, SourceTree, APIs
Game Programmer
2013 - 2014
Tactile Entertainment
- Contributed to mobile games with millions of downloads including Skyline Skaters (#1 in App Store in 60+ countries) and Airheads Jump, focusing on gameplay programming and user experience optimization.
- Developed custom level editor tools to streamline content creation workflows for the design team, improving development efficiency and iteration speed.
- Implemented native mobile integrations for iOS and Android platforms, writing custom plugins for advertising SDKs and third-party services before Unity marketplace solutions existed.
- Conducted comprehensive multi-device testing and debugging across diverse mobile hardware configurations, ensuring consistent performance and user experience.
Technologies: Unity, iOS, Android, Facebook SDK, Unity3D Native Plugin Interface, Apps, Agile Software Development, Unity3D, C#, Xcode, Object-oriented Programming (OOP), MacOS, Mobile Development, iOS Native Libraries, Windows, APIs
Experience
Voice-enabled Real-time Patient Education with AI Answers
I architected and maintained the back-end infrastructure for HIA Topics, the core patient-facing platform serving 93,000+ user sessions with 99.9%+ uptime. This system delivers interactive, voice-enabled educational presentations where patients can ask real-time questions and receive answers curated by their physicians. I built the comprehensive back end, handling content delivery, AI integration with vector search and semantic similarity, user session management, and detailed analytics. The platform integrates 35+ external services, including Azure Cognitive Services, Pinecone vector database, and multiple AI/ML platforms, ensuring accurate and safe patient education while maintaining strict HIPAA compliance.
Doctor-facing Editor for AI Health Content
I served as Principal Software Engineer for the back end of HIA Studio, the doctor-facing content authoring platform behind our patient AI system. I took over from the original development team and led architecture, development, and scaling for five years.
This multi-tenant enterprise platform powers 190+ healthcare organizations, including WebMD, enabling them to create, manage, and deploy interactive presentations with AI-powered Q&A. I built secure content workflows, role-based access control, and HIPAA-compliant analytics dashboards that track authoring activity, content usage trends, and platform adoption.
The system supports AI topic management, real-time updates, and performance monitoring across hundreds of organizations—all delivered via a robust Azure PaaS architecture.
This multi-tenant enterprise platform powers 190+ healthcare organizations, including WebMD, enabling them to create, manage, and deploy interactive presentations with AI-powered Q&A. I built secure content workflows, role-based access control, and HIPAA-compliant analytics dashboards that track authoring activity, content usage trends, and platform adoption.
The system supports AI topic management, real-time updates, and performance monitoring across hundreds of organizations—all delivered via a robust Azure PaaS architecture.
Interactive Video Platform with AI Q&A System
https://www.hia.ai/I contributed to Qvio's development as a senior developer, focusing on back-end architecture guidance and AI system optimization. I provided extensive code review across 400,000+ lines of codebase, architectural consultation, and direct contributions to AI functionality. The platform transforms passive videos into interactive experiences where viewers can ask questions and receive validated answers authored by content creators. I worked on optimizing OpenAI API integrations, ensuring safety guardrails, and I also contributed to the overall system design.
GDPR-compliant Membership Portal for Cat Rescue with 275+ Members
http://medlem.xn--kattekbing-5cb.dk/A full-stack GDPR-compliant membership management system for a cat rescue organization with 275+ members. I developed this comprehensive membership portal from scratch as both a learning project for Next.js and Supabase and a practical solution for the local cat rescue organization. The system handles complete membership lifecycle management with secure authentication, admin dashboards, automated newsletter systems, and certificate management. I implemented role-based access control with row-level security, multi-channel communication (email via MailerSend and SMS via GatewayAPI), and comprehensive GDPR compliance features.
Physics-based Rollercoaster Simulator for Siemens
An interactive physics education platform for Siemens, combining rollercoaster simulation with gravitational potential energy calculations.
As the sole programmer for this exciting Siemens educational project, I collaborated with physicists to develop accurate simulation algorithms for rollercoaster physics education. The project combines HTML5 Canvas with Tumult Hype animations to create an engaging learning experience where students experiment with rollercoaster track heights to achieve thrilling yet safe rides. The system progresses from trial-and-error gameplay in early levels to complex physics calculations involving gravitational potential energy and kinetic energy formulas in advanced stages, complete with educational task sheets and interactive problem-solving.
As the sole programmer for this exciting Siemens educational project, I collaborated with physicists to develop accurate simulation algorithms for rollercoaster physics education. The project combines HTML5 Canvas with Tumult Hype animations to create an engaging learning experience where students experiment with rollercoaster track heights to achieve thrilling yet safe rides. The system progresses from trial-and-error gameplay in early levels to complex physics calculations involving gravitational potential energy and kinetic energy formulas in advanced stages, complete with educational task sheets and interactive problem-solving.
Multiplayer Educational Farming Game for Schools
An educational farming simulation for Danish schools featuring multiplayer classroom gameplay and ethical decision-making.
As Lead Developer at Lucus Aps, I managed a team of 4-5 developers to create this educational farming simulation designed specifically for Danish primary schools. The game challenged students to manage virtual farms while making both financial and ethical decisions, teaching real-world agricultural concepts. I architected a custom multiplayer networking system designed to handle unstable school network environments, featuring a real-time market simulation where prices dynamically responded to student actions across connected devices. The project included field research visits to actual farms and testing in real classroom environments.
As Lead Developer at Lucus Aps, I managed a team of 4-5 developers to create this educational farming simulation designed specifically for Danish primary schools. The game challenged students to manage virtual farms while making both financial and ethical decisions, teaching real-world agricultural concepts. I architected a custom multiplayer networking system designed to handle unstable school network environments, featuring a real-time market simulation where prices dynamically responded to student actions across connected devices. The project included field research visits to actual farms and testing in real classroom environments.
100v100 Battle Simulator (5+ Million Downloads)
An epic mobile battle simulator achieving 5+ million downloads with massive 100v100 multiplayer battles and real-time synchronization.
I contributed to this highly successful mobile game that achieved over 5 million downloads on Google Play. My role focused on implementing the complex multiplayer networking system using Photon, managing real-time synchronization for battles with up to 100v100 units, where any individual unit could be controlled by players. I integrated PlayFab as the back-end system, implemented multiple advertising providers, and prepared the iOS release. The technical challenge involved ensuring accurate position synchronization across all units while managing network latency and Photon's message limits, which was crucial for maintaining fair and engaging gameplay in such large-scale battles.
I contributed to this highly successful mobile game that achieved over 5 million downloads on Google Play. My role focused on implementing the complex multiplayer networking system using Photon, managing real-time synchronization for battles with up to 100v100 units, where any individual unit could be controlled by players. I integrated PlayFab as the back-end system, implemented multiple advertising providers, and prepared the iOS release. The technical challenge involved ensuring accurate position synchronization across all units while managing network latency and Photon's message limits, which was crucial for maintaining fair and engaging gameplay in such large-scale battles.
Endless Runner (1+ Million Downloads)
A high-speed rooftop skateboarding endless runner achieving 1+ million downloads and the #1 App Store ranking in 60+ countries.
I contributed to this highly successful endless runner during my time at Tactile Entertainment, helping create a game that achieved over 1 million downloads before being unpublished in 2020, and reached #1 in the App Store Games category in over 60 countries. My contributions included gameplay programming, UI development, native plugin integration, localization support, and comprehensive bug fixing. The game features fast-paced rooftop skateboarding action where players perform hazardous building-to-building jumps while escaping authorities, with smooth mobile controls and multiple character unlocks.
I contributed to this highly successful endless runner during my time at Tactile Entertainment, helping create a game that achieved over 1 million downloads before being unpublished in 2020, and reached #1 in the App Store Games category in over 60 countries. My contributions included gameplay programming, UI development, native plugin integration, localization support, and comprehensive bug fixing. The game features fast-paced rooftop skateboarding action where players perform hazardous building-to-building jumps while escaping authorities, with smooth mobile controls and multiple character unlocks.
Jungle Platformer (500,000+ Downloads)
A colorful jungle platformer achieving 500,000+ downloads, featuring tilt-based controls and over 100 challenging levels.
I contributed to this successful mobile platformer during my time at Tactile Entertainment, helping deliver a game that achieved over 500,000 downloads and hit #1 in Games in several countries. My responsibilities included gameplay programming, UI development, implementing native iOS plugins, localization support, and comprehensive bug fixing. The game features intuitive tilt and tap controls for jungle-themed platforming action, with players bouncing through levels using platforms and power-ups while collecting butterflies, battling Tikis, and rescuing fellow Airheads across more than 100 levels.
I contributed to this successful mobile platformer during my time at Tactile Entertainment, helping deliver a game that achieved over 500,000 downloads and hit #1 in Games in several countries. My responsibilities included gameplay programming, UI development, implementing native iOS plugins, localization support, and comprehensive bug fixing. The game features intuitive tilt and tap controls for jungle-themed platforming action, with players bouncing through levels using platforms and power-ups while collecting butterflies, battling Tikis, and rescuing fellow Airheads across more than 100 levels.
Realistic Sprint Car Racing Simulation Game
A realistic dirt track racing simulation featuring authentic sliding mechanics and a championship mode across nine unique tracks.
I developed this specialized racing game focused on the unique mechanics of sprint car dirt track racing, emphasizing the authentic sliding and cornering techniques that define this motorsport. The game features eight different sprint cars racing across nine distinct dirt tracks, with realistic physics that capture the characteristic sliding motion around corners that sprint car fans expect. Through multiple updates, I expanded the game with a championship mode that provides extended gameplay and progression. The project successfully delivered an authentic sprint car racing experience that resonates with motorsport enthusiasts.
I developed this specialized racing game focused on the unique mechanics of sprint car dirt track racing, emphasizing the authentic sliding and cornering techniques that define this motorsport. The game features eight different sprint cars racing across nine distinct dirt tracks, with realistic physics that capture the characteristic sliding motion around corners that sprint car fans expect. Through multiple updates, I expanded the game with a championship mode that provides extended gameplay and progression. The project successfully delivered an authentic sprint car racing experience that resonates with motorsport enthusiasts.
Education
2011 - 2013
Master's Degree in Game Technology
IT University of Copenhagen - Copenhagen
2007 - 2011
Bachelor's Degree in Computer Science
“Politehnica” University Of Bucharest - Bucharest
Skills
Libraries/APIs
REST APIs, Back-end APIs, Google Sheets API, OpenAI API, Azure Cognitive Services, Google Speech API, HTML5 Canvas, Node.js, Google API, Google APIs, Google Drive API, Stripe, Stripe API, Three.js, React, Facebook SDK, Vue, iOS Native Libraries
Tools
SourceTree, Postman, Whisper, ChatGPT, Claude, Codex, Claude Code, Claude Agent SDK, Adobe Illustrator, Construct 2, Xcode, Git, Amazon Polly, MailerSend, Canvas, Zapier, Audacity, Blender, Inkscape
Languages
C#, SQL, JavaScript, Java, TypeScript, HTML, HTML5, CSS3, CSS, Python
Frameworks
Unity, Unity3D, ASP.NET Core, Swagger, .NET, Entity Framework Core, .NET Core, MVC Razor, Next.js, Tailwind CSS, Express.js, Angular, Photon
Paradigms
Agile Software Development, Object-oriented Programming (OOP), Azure DevOps, HIPAA Compliance, Mobile Development, Model Context Protocol (MCP), DevOps, Search Engine Optimization (SEO)
Platforms
MacOS, Linux, Windows, Android, iOS, Azure, Azure Functions, Azure PaaS, Ollama, Vercel, Amazon Web Services (AWS), WordPress, Google Cloud Platform (GCP)
Storage
Azure SQL, Azure Cosmos DB, Azure Blobs, Microsoft SQL Server, NoSQL, Google Cloud, PostgreSQL
Other
Apps, Game Design, Unity3D Native Plugin Interface, ASP.NET Core 8, Azure Blob Storage, Back-end, Back-end Development, System Architecture, Artificial Intelligence (AI), Retrieval-augmented Generation (RAG), Vector Databases, Pinecone, AI Integration, AI Model Integration, Speech-to-Text (STT), Azure Text to Speech, Text-to-Speech (TTS), Minimum Viable Product (MVP), Full-stack, Google Speech-to-Text, Web Development, API Integration, Software as a Service (SaaS), Large Language Models (LLMs), Data Analytics, General Data Protection Regulation (GDPR), Educational Games, APIs, Healthcare Software, SaaS, Cursor AI, Anthropic, Gemini, Gemini API, GitHub Copilot Chat, Full-stack Development, Generative Artificial Intelligence (GenAI), Prompt Engineering, CSV File Processing, Analytics, Solution Architecture, Multi-agent Orchestration, Groq, Tumult Hype, ElevenLabs Solutions, IBM Watson Speech to Text, Supabase, Supabase Auth, SMS, Physics Simulations, Multiplayer, Leadership, Email Automation, Dashboards, QR Codes, SDKs, CI/CD Pipelines, OAuth, AI Agents, Agentic AI
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