I build both native Android and native iOS apps — and when a project needs more than the app, I take the web front end, the API and the cloud infrastructure with it. 15+ years, from the early Android era through to Kotlin and Jetpack Compose. For the past four years I led Android across two enterprise products at Humanforce: a frontline workforce-management app and an employee benefits and financial-wellbeing app. Before that I spent eight years as the sole Android engineer on Sniip, a consumer bill-payments app I built from scratch — by the time I left it had 74,000+ registered users and had processed over $430M in payments. What I do best: • Native Android in Kotlin — Jetpack Compose, MVI/MVVM, Clean Architecture, multi-module Gradle, Hilt, Coroutines/Flow. Whole apps from scratch, or new features inside an existing codebase. • End-to-end delivery when you'd rather hire one person than three — I'm doing exactly that right now for an Australian care provider: a native Android app in Compose sitting on a Postgres backend I also build, covering the schema, row-level security, serverless API endpoints, QR-based device enrolment and the CI pipeline, in four languages from day one. Native iOS follows under the same contract, built once each Android slice is accepted. I also work across React/Next.js and Vue front ends, Node/NestJS and Spring Boot APIs, REST and gRPC, MySQL, and AWS (ECS, RDS, Cognito) provisioned with Terraform. • Rescue and modernisation — I co-architected the ground-up native replacement of a React Native app, delivered at feature parity across 15 independently buildable, individually tested modules. I've also migrated an app from Kotlin Multiplatform to native Android, and led a complete Java-to-Kotlin migration. If your app is slow, brittle or stuck on an architecture nobody wants to touch, this is my strongest work. • Release and quality plumbing — GitHub Actions CI/CD across environments, Play Store and Firebase App Distribution delivery, automated versioning, unit and end-to-end test suites, crash triage. I introduced the aggregated coverage reporting on a production codebase that now measures 90%+ instruction coverage on its ViewModel layer. How I work: I write tests, I explain trade-offs in plain language instead of jargon, and I use AI-assisted tooling to move faster while every line still passes my own review before it ships. I also build and sell my own commercial Chrome extension, so I know what it takes to support a product, not just write one. Based in Brisbane, Australia (UTC+10) and fully remote for the past four years — easy overlap with Asia-Pacific, and workable hours with US and European teams. Tell me what you're building, or what's broken, and I'll tell you honestly whether I'm the right person for it.

I specialize in e-learning LMS (Learning Management Systems), e-commerce websites, search engine optimization, website development and optimization. Have a lot of expertise in building network infrastructure for small and medium-sized companies - deploying and optimizing servers/AWS/Azure/Google Cloud instances for Wordpress, Magento, Odoo and other web applications. Expertise in integration development (Mulesoft Certified), Microsoft products (Azure, Office365, AD, Server, MSSQL, IIS). 10+ years of experience with Search Engine Optimization (SEO), SEM, Google products - Google Ads, Merchants, MyBusiness, Maps (Certified Google Partner), Certified Microsoft Ads Expert (Bing Ads). 15+ years in Web Development, 12+ years with Wordpress, 10+ years building Learndash and Moodle LMS websites, including big projects with 30000+ students. Worked with clients from different industries and countries, 30+ LMS projects completed in the past 5 years. 3+ years with Shopify stores, including developing Custom Shopify apps (using JS and liquid), creating mobile apps for IOS and Android using CapacitorJS via Xcode and Android Studio.

My specialty is integrating across various Computer Aided Engineering (CAD, CFD) software platforms. I am also an expert at automating CAD modeling jobs using parametric design and APIs. In addition to numerous desktop software programs I also created Unity3D VR and AR Android mobile apps and educational demos. You can rest assured that I can understand and scope your issues as I have fifteen years of experience developing Engineering software for the Architectural, Mechanical and Aerospace industries. My education includes advanced degrees in Aerospace Engineering and Computational Fluid Dynamics. I started programming when I was twelve and by the time I was sixteen I was building file manager applications, database management tools and 3D games under MSDOS - yeah, I'm dating myself here :) I am also very skilled at creating powerful macro-enabled spreadsheets in Excel using VBA. I've also developed solutions integrating Excel with MySQL databases and PHP backends, and with desktop applications. If you need help with software dealing with CAD, BIM, Simulation or Business Intelligence, I can save your company time and money! Services overview: -Automation: Saving man hours (spent on repetitive tasks) through intelligent scripts, custom software and parametric CAD models. -Interoperability: Converting CAD models to Analysis models. Custom translators and plugins. Linking BIM models to web APIs and databases. -Simulation: Computational modeling of physical phenomena. -Computer Aided Engineering (CAE) in the Cloud: Distributed computing using AWS and HPC. Web / VR/ AR interfaces for your CAE software. -Project Management Solutions: Small business project management software creation and deployment. Microsoft Office document customization.

I build Mobile apps ( React Native ) that are robust, fast, stable to use for businesses ( from early startups to large scaled ) — the kind that don't crash, don't lag, and don't need a rewrite Over 8.5+ years I've led mobile teams and shipped consumer apps at scale for companies like Zepto, Cars24, and Gameskraft. A few numbers from real products: ⭐ 99.97% crash-free and 99.99% ANR-free rates at scale ⭐ Buttery smooth screens ( UIs ) ⭐ Improved FPS from 42 to a smooth 60, cut CPU usage by 40% ⭐ 5x faster data flow and 10x smaller image payloads ⭐ Proactive communication for visibility and transparency ⭐ Predictable ETA/Execution and releases of project HOW I CAN HELP YOU: ✅ Build a new app (iOS + Android) from scratch — clean, scalable architecture ✅ Rescue a broken app — fix crashes, ANRs, freezes, memory leaks, and jank ✅ Buttery 60 FPS gaming animations & gestures (Reanimated, Gesture Handler) ✅ Native modules & bridging (iOS/Swift, Android/Kotlin) ✅ Payment integrations — Stripe, Razorpay, Juspay, Adyen, UPI ✅ CI/CD & instant updates — Bitrise, Fastlane, CodePush OTA, store releases MY STACK: React Native, React.js, TypeScript, Expo, Redux/RTK, React Query, Reanimated, Flashlist, Native Modules, Node.js, GraphQL, AWS, Crashlytics, Sentry. I've led teams of 7-8 engineers, so I communicate clearly, plan realistically, and care about your product — not just closing a ticket. You'll always know where things stand. Whether you're starting a new app or fixing one that's falling apart, send me a message with your project. I'll reply with honest, specific input on the best way forward — no generic sales pitch.

I'm a full-stack mobile and web developer with hands-on experience building production-grade web applications, AI-powered tools, and scalable cloud infrastructure. What I do best: Full-Stack Web Development — I build end-to-end applications using React, Next.js, TypeScript, Node.js, and PostgreSQL. From responsive frontends to robust REST APIs, I deliver clean, maintainable code that scales. AI & RAG System Development — I design and implement intelligent systems using retrieval-augmented generation (RAG), vector databases (pgvector), and semantic search. At Qurius AI, I reduced customer response times by 80% with a custom RAG pipeline using Jina embeddings. Cloud & DevOps — I deploy and manage applications on AWS, Google Cloud, and Azure, with CI/CD pipelines (GitHub Actions, Vercel, Render) and containerized architectures using Docker. Startup & SaaS Experience — As the founder of Qurius AI, I independently built a multi-tenant enterprise SaaS platform with Stripe payments, role-based auth, and 99.9% uptime — handling everything from architecture to deployment. AI Governance & Responsible AI — Through my work at the New Jersey Division on Civil Rights, I've developed expertise in algorithmic fairness, bias evaluation, and explainability in public-sector AI systems.

Hello! I have 20 years experience with web development. 17 of those years have been with a Ruby on Rails focus and accompanying DevOps. I also have extensive experience with client-side Javascript. I believe maintaining a high-level of communication during a project is paramount to the success of a project, in addition to it finishing on-time and on-budget. Software development is my business, I'm not moonlighting with a full-time job during the day. As such, I will not disappear one day to never be heard from again. Which unfortunately is a common situation with freelance developers. Additionally, I believe in high-quality software development practices like automated testing, test-driven development, continuous integration/delivery, daily stand-ups, etc All of this is with the end goal of helping businesses increase their return on investment with their software development projects. I have expert experience with the following technologies : - Ruby, Ruby on Rails - Javascript/Ecmascript 5+, Hotwire/Turbo/Turbolinks - HTML5, CSS3 - Nginx - Ubuntu, DevOps - Postgres, MySQL - Rackspace, AWS, Digital Ocean, Heroku - Background processing, Queuing (Resque/Sidekick) - REST, Web Services, SOAP - High-performance APIs (JSON/XML) - Payment Processing - Stripe, Braintree, Paypal, Chargify I also have general experience with: - Apache - Linux variants other than Ubuntu - ElasticSearch, Solr, Sphinx - MongoDB Thanks for reading if you made it this far. Let's make something great together!

I am an AI-Augmented Full Stack Architect & Engineer with 28 years of experience delivering high-quality software solutions. My expertise spans mobile apps, generative AI, and distributed systems, allowing me to tackle complex challenges with creativity and precision. I have led projects that brought products to life on both iOS and Android platforms, including notable applications in smart home technology and health management. My background as a co-founder and CTO fuels my passion for collaboration and innovative thinking. Whether you need a robust mobile application or comprehensive software design, I bring a wealth of experience and technical acumen. I am eager to partner with you to transform your ideas into exceptional products that meet user needs effectively. Let’s discuss how I can contribute to your project’s success.

I help clients fix, extend, and modernize serious Drupal/PHP systems, API integrations, and customer-facing web/mobile workflows. I have nearly 20 years of software engineering experience, including enterprise Drupal work, custom modules, MySQL-backed applications, REST APIs, Square/Firebase integrations, and iOS apps that depend on reliable backend behavior. I was Drupal 7 certified earlier in my career and have continued hands-on Drupal/PHP work since then. Strong fits for me include: - Drupal/PHP rescue work, maintenance, upgrades, custom modules, and API endpoints - Laravel/PHP backends, MySQL data models, webhooks, queues, and production debugging - Square, Firebase, OAuth, REST API, and third-party integration work - Swift/iOS app features connected to real business workflows - Practical AI/OpenAI automation where the output needs to be tested, maintainable, and useful I am especially useful when a project is part product work, part integration work, and part production cleanup. I like to clarify the real workflow first, identify the risky pieces, split the work into clean milestones, and deliver code with enough documentation that the next developer is not trapped guessing what changed. I use modern developer tooling, including AI-assisted coding where it genuinely speeds up exploration, but I keep responsibility for the architecture, review, testing, and final delivery.

I build complete apps solo — web apps in React/TypeScript, iOS apps in SwiftUI — from first commit to production deploy or App Store release. And I make the AI inside them measurable: eval harnesses, labeled test sets, and observability, so "it works" is a number, not a feeling. Shipped recently (all solo, all live): • iOS food-tracking app with vision-AI food recognition — SwiftUI, App Store, subscriptions • Full-stack document-AI web app: upload → OCR/extraction → structured data with per-field confidence • Claude agent running as a scheduled production actor on Apify • Live demo you can try right now: env-permit-demo.steventsao.workers.dev What I'm strong at: • Web apps — React, TypeScript, Python (FastAPI), Postgres, Cloudflare/Vercel; production deploys, not prototypes • iOS apps — SwiftUI, TestFlight → App Store, in-app subscriptions • AI features that hold up — Claude / GPT / Gemini integrations, OCR & document extraction, RAG • LLM evals — gold-label test sets, accuracy and regression harnesses, tracing/observability. Built these at an LLM-observability startup; e.g., cited extraction across 84 SEC filings with wrong answers caught before delivery. How I work: fixed pilots with clear endpoints — you judge a working slice within days, not a proposal. Small commits to your repo from day one. Solo, end to end: design → build → deploy → iterate. A decade of software engineering (ex-LinkedIn senior engineer); AI products full-time since 2023. Good fit: MVPs and v1s shipped fast · AI features in existing products · web + iOS builds · LLM evals & quality harnesses · document/data-heavy apps. Not a fit: WordPress, graphic design, $8/hr data entry. Tell me what you're building and I'll return a scoped plan within a day — judge the output, not the proposal.

Full-Stack & Mobile App Developer | System Design Overview: I build applications that work — web apps, mobile apps, and the backend systems that power them. Web Development: React, Vue, Node.js, .NET, Python — frontend to backend, APIs to databases MSSQL, CosmosDB, NoSQL — data architecture that scales Azure cloud infrastructure, CI/CD pipelines, Docker — deployed and automated Mobile Development: Cross-platform apps with Flutter Native performance, clean UI, real functionality System Design: Microservices architecture Distributed systems built for reliability API design, authentication, security — the parts that make an app production-ready I handle projects from concept to deployment. You give me a brief, I build it, ship it, and keep you updated every step of the way. Whether you need a web dashboard, a mobile app, or a backend system that ties everything together — I can deliver. Stack: Flutter | Python | Rust | C# | .NET | Java | JavaScript | TypeScript | React | Vue | Node.js | MSSQL | CosmosDB | Azure | Docker | Git