Mobile Applications
iOS with Swift, SwiftUI, UIKit, Combine, StoreKit, Vision, WatchKit, and HealthKit; Android with Kotlin; and cross-platform delivery with React Native, Expo, Flutter, and Unity.
Professional Experience
Senior Software Consulting & Product Development Experience
Bill Vivino works with founders, technical leaders, and organizations that need an experienced development partner—not another layer between the business problem and the engineering work.
His work spans native and cross-platform mobile applications, web products, backend APIs, cloud systems, AI integrations, Unity, and augmented reality. Engagements range from new product development to architecture, technical rescue, and hands-on delivery inside existing codebases.
Professional Overview
Senior engineering where product and technical decisions meet
Bill’s experience is strongest in work that crosses boundaries: a mobile feature that depends on the backend, a prototype that needs a durable architecture, a cloud workflow that must serve real users, or an inherited application that has to become maintainable before it can move forward.
He has led and delivered native iOS, Android, React Native, Unity, web application development, API, database, and cloud work. That breadth supports practical product development—not technology for its own sake—and helps buyers evaluate tradeoffs across the whole system.
Where this experience is most useful
- New products and focused MVP development
- Existing app or codebase stabilization
- Architecture, integration, and system design
- Hands-on technical leadership through delivery
Core Technical Expertise
A cross-platform view of the product
The technology breadth reflects full product responsibility: client applications, services, data, infrastructure, integrations, and the release work that connects them.
Web, APIs & Data
React, Next.js, Node.js, Express, Firebase Functions, REST APIs, PostgreSQL, Drizzle ORM, SQL Server, GraphQL, WebSockets, and FHIR-based healthcare interoperability.
Cloud & Operations
Firebase, Azure, AWS, Docker, BigQuery, Cloud Pub/Sub, deployment, authentication, role-aware access, offline synchronization, and production support.
AI, Unity & AR
Generative AI application integrations, Apple Vision, TensorFlow.js, Unity/C#, AR Foundation, ARKit, Vuforia, WebAR, computer-vision workflows, and interactive product experiences.
Selected Consulting & Product Experience
Representative systems and product responsibilities
These examples show the kinds of product and engineering problems Bill has handled across mobile, web, backend, cloud, and specialized systems.
Surgical Workflow Coordination Platform
Full-stack architecture and delivery across TypeScript, React, Node.js, PostgreSQL, healthcare interoperability standards, real-time communication, native iOS, and native Android. The work includes multi-role workflow modeling, notification logic, relational data design, scheduling integration, authenticated access, and synchronized application state.
Relevant capabilities: workflow architecture, full-stack rescue, data modeling, integrations, and cross-platform delivery.
Industrial Field-Service Operations Platform
Architecture and implementation of a cross-platform mobile application and TypeScript API for industrial field workflows. The system uses hierarchical operational data, offline-capable synchronization, cloud deployment, containerized development, relational storage, secure authentication, search, and deep linking.
Relevant capabilities: cross-platform mobile architecture, backend APIs, offline data, cloud operations, and maintainable delivery.
Mobile Field & Connected-Device Systems
Selected work includes native measurement and mapping tools that integrate external positioning hardware, iOS and Android connected-device control, multilingual offline field collection, and native mobile sharing workflows connected to cross-platform products.
Relevant capabilities: device integration, offline workflows, geospatial interfaces, background processing, and native platform extensions.
Consumer, Community & Creator Products
Product work spans native iOS, native Android, responsive web, cloud backends, and cross-platform applications. Responsibilities include profiles and messaging, media pipelines, notifications, background processing, analytics, subscriptions, interactive drawing and vision features, and store delivery.
Relevant capabilities: realtime products, media handling, serverless backends, analytics, subscriptions, and release support.
Mobile Application Development
Native depth with cross-platform judgment
Mobile work is treated as a complete product system: interface, state, data, authentication, hardware, backend behavior, distribution, and long-term maintenance.
iOS, Swift & SwiftUI
Native application work across SwiftUI and UIKit, Firebase-backed products, Combine and MVVM state, App Store delivery, StoreKit, Apple Vision, media, maps, WatchOS, HealthKit, and hardware SDKs.
View iOS consulting servicesAndroid, Kotlin & shared products
Native Android work in Kotlin plus React Native/Expo delivery across iOS, Android, and web—including native modules, deep links, background processing, offline behavior, and release workflows.
View React Native consulting servicesConnected and spatial experiences
Wireless device communication, external positioning data, watch-to-phone interaction, authenticated device workflows, AR camera experiences, computer vision, and Unity-based mobile delivery.
Web, Backend, Cloud & AI
The systems behind the interface
Bill’s software consulting work regularly extends beyond the client app into API design, data modeling, identity, cloud deployment, analytics, and AI-enabled workflows.
Web applications and backend APIs
React and Next.js interfaces connected to Node.js/Express services, Firebase Functions, PostgreSQL, SQL Server, GraphQL, WebSockets, and third-party platforms. Work includes API contracts, auth, real-time behavior, structured data, and operational tooling.
Cloud and data systems
Firebase, Azure, AWS, Docker, BigQuery, Power BI, Azure Data Factory, Azure SQL, Blob Storage, Cloud Pub/Sub, role-level security, and documented technical handoff across mobile, web, and reporting systems.
AI integrations in real products
Experience includes a cross-platform generative-AI assistant with secure authentication, progressive responses, source citations, and contextual media; plus native visual-computing features, browser-based segmentation, image-generation workflows, and server-side motion analysis.
Explore AI integration consultingPublic-Sector Software
Interactive experiences and internal data systems
Two public-sector consulting engagements demonstrate different sides of delivery: an augmented-reality educational experience and an internal reporting and cloud-data system.
Public Science Education AR Experience
Unity and C# work for a publicly released iOS and Android educational application. Responsibilities included AR models and object interaction, AR and 3D interface behavior, scene and production bug fixes, store delivery, maintenance, and feature updates.
Internal Program Reporting & Cloud Data
In a separate engagement, Bill designed and deployed an internal analytics dashboard supported by multiple data sources and managed cloud services. Responsibilities included data integration, role-aware access, automated refresh workflows, performance work, documentation, and technical handoff.
Together, the engagements show both sides of the work: a public, interactive mobile experience and a private data system supporting internal decision-making.
Technical Leadership & Delivery
Architecture connected to implementation
Lead roles across mobile, full-stack, GIS, and product work support a practical form of technical leadership: understand the system, find the highest-risk boundary, make the architecture legible, and stay close enough to implementation to validate the decision.
The underlying work includes re-architecture, API and data-model design, hardware-independent test harnesses, unit-testable services, deployment and distribution, production maintenance, documentation, technical handoff, and collaboration with domain experts and cross-functional teams.
Delivery approach
- Start with the system’s real constraints
- Prioritize the highest-leverage technical work
- Combine review, architecture, and implementation
- Keep product decisions connected to engineering reality
Education & Background
Computer science foundations and product breadth
Bill earned a Bachelor of Science in Computer Science from Rutgers University in 2004, graduating from the Honors Program with a 4.0 GPA in his computer science courses.
His early background includes computer science internships at IBM and Lucent Technologies. That foundation developed into mobile, web, cloud, game, AR, AI, and full-stack consulting work across a wide range of products and organizations.
Services & Next Steps
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