Am a professional software developer specialty include developing * iOS apps, *mobile responsive apps , *game development for desktop iOS and mobile devices, *Web development: website development for big, average and small sized businesses,web apps and games tailored to your budget. *SEO optimization for better visibility. *Full time project management from start to finish after development. I am proficient in Flutter, HTML, JS, CSS3, PHP,Node.js,React, java, python etc I value communication as it is necessary for work and delivery so let's keep in touch.

I have worked in machine learning, computer vision, audio processing, defense (signals intelligence), medical imaging (stereotactic radiosurgery, ultrasound), life sciences (biotech/pharma), medical robotics, and wireless communications. Involved in writing a significant amount of software, ranging from the desktop/workstation/cloud arena (Wintel, Linux, Mac OS X) to deeply embedded systems (TI DSPs, MCUs, ARM) and in between! My 1st book, "Embedded Image Processing on the TMS320C6000 DSP (Examples in Code Composer Studio and MATLAB)," was published way back in April, 2005. I am a co-inventor or inventor on 15+ issued patents. I have published numerous articles in various trade magazines, and consulted for numerous companies both big (Meta, Google, TI, AMD, Sony) and small (many startups & medium sized firms).

I help founders and engineering leaders make difficult product and architecture decisions, recover stalled software initiatives, and introduce AI-assisted development without losing reliability, privacy, or human control. Complex software projects rarely struggle because nobody can write the code. More often, product priorities, architecture, delivery practices, and ownership have stopped aligning. You can bring me in to: • Review an AI product or software architecture • Diagnose a stalled MVP or troubled engineering initiative • Design reliable, human-governed AI-agent workflows • Provide fractional CTO-level technical guidance • De-risk macOS and iOS architecture or delivery • Review privacy-sensitive and local-first systems My background spans consumer products, developer infrastructure, enterprise software, and technical leadership, including work involving Calm, Snyk, Realm, CocoaPods, and Mercedes-Benz. I combine strategic and hands-on engineering experience. That means I can discuss product direction with leadership, examine the underlying systems with engineers, and translate the findings into decisions people can act on. A typical engagement begins with a focused assessment. You receive a clear written deliverable covering the current situation, material risks, recommended decisions, and prioritized next steps. When useful, I can remain involved through implementation, technical leadership, or an ongoing advisory relationship. I’m particularly well suited to situations where: • The product is technically ambitious but the path forward is unclear • Delivery has slowed and the underlying cause is disputed • An important architecture decision needs an independent second opinion • Your team wants to adopt AI-assisted development without sacrificing reliability or control • You need senior technical judgment without immediately hiring a full-time CTO If that resembles your situation, send me a short description of the product, the decision or problem you are facing, and what a successful outcome would look like.

I'm a mobile developer based in the Czech Republic who genuinely enjoys the full lifecycle of building an app — from writing native Swift, to designing the pipeline that ships it to real users without anyone babysitting the process. I also work in Kotlin for Android when a project calls for it, but Swift and the Apple ecosystem are where I'm strongest. Where I do my best work: - iOS development (Swift) — my core strength, building native apps end-to-end - Cross-platform mobile — comfortable in Kotlin/Android when a project needs both platforms - CI/CD & release automation — GitLab pipelines with Fastlane, automated TestFlight delivery - Project ownership, start to finish — I take a project from initial scope through build, testing, and release, rather than handing off pieces - Clear communication — I keep clients in the loop with straightforward updates, flag blockers early, and document decisions so nothing gets lost along the way

I am a dedicated developer with 2+ years of intensive experience specializing in building robust, high-performance applications with Firebase as the core backend infrastructure. My expertise isn't just in writing code; it's in leveraging the full power of the Google ecosystem to deliver scalable, stable, and cost-effective solutions. Why Hire Me? The Value I Deliver: Rapid MVP Development: My signature strength is translating concepts into working Minimum Viable Products (MVPs) quickly and efficiently. If your project is on a tight deadline, I thrive on the challenge of rapid deployment without sacrificing quality. Full Firebase Ecosystem Mastery: I go beyond simple database integration, utilizing Firestore/Realtime Database, Authentication, Cloud Functions (Node.js), Storage, and Hosting to create seamless, end-to-end applications. Reliability & Scalability: I build apps engineered for growth. You won't have to worry about the backend buckling as your user base expands. Clear Communication: I believe successful projects depend on clear, proactive communication. You'll always know the status of your app, and I'll translate technical details into straightforward business impacts. Let's make your next project my next success story. Whether you need to deploy a complex web platform, a mobile backend, or a high-speed data application, I have the stack and the speed to get you to launch faster.

I've worked in every domain of software. Tell me what you're up to and I'll lead us through an effective solution. - Backend specialist for 5 years at S&P and Banqsoft. - Mobile specialist for 7 years with Diversido, Noble Muffins and other clients. - Professional experience with React, TypeScript, C++ and Java. I got my start when I took over IT at a horse trailer dealership to gather money to move to Europe. At S&P, I took our team's first two microservices from zero to production. I later served as scrum master, and was given a technical excellence award for my work in SQL optimization. As a game developer, my Turbo Slicer product has been featured repeatedly by the Unity Asset Store. I wrote a finite element analysis kit for PlayWay S.A. to manage building collapse for the games Construction Machines 2016, Demolish & Build 2017 and Demolish & Build 2018. In my spare time I support new programmers on Codementor.io.

A 30 year veteran software engineer, creating professional iPhone/iOS apps and bullet-proof backend servers. I build quality systems from scratch -- built to last -- and as a software entrepreneur, I can help you achieve your business goals, and dreams. "Hands down - Greg is fantastic. He was always very responsive, had a great understanding of what needed to be accomplished and made practical and appropriate recommendations. Technically he was heads above others I have hired. I will definitely hire Greg again.." -- Eric M, Zonealytics CEO I'm a senior computer scientist with deep knowledge of iPhone iOS development, back-end server design, large-scale electronic commerce systems, Web-based services, startups, medical and chemical systems. My experience in all phases of the software lifecycle -- from design, development, and QA through product release, marketing, sales, and product support -- ensures your success with professional quality design and code. "Greg vetted my project and gave me a realistic assessment on scope and deliverables -- from his years of experience! The first stage of mobile development was delivered with excellent results. Really impressed! Looking forward to working with Greg on the next phase of the project." -- Chuck Dudley, Connecticut I'm also a successful business founder with experience in recruiting and leading teams for start-ups, sales and fund raising. - Native speaker of English and US Citizen. Also proficient in French. RECENT PROJECTS in the APPLE APP STORE -------------------------------------------------------- Starboard Suite Reservations & ticketing for Passenger Vessels and Water Sports Motion Traxx Audio Workouts featuring Coaching and Music for Treadmill, Spinning, Elliptical, HIIT, and Cardio CoutureLane Social media and e-commerce app in the Style and Fashion market. Splash Pay Created custom Swift Framework to encapsulate Splash Payments' REST API and made the first iOS app to use it. NeozWorld Sports forecasting app with custom Node.js backend server. PREVIOUS PROJECTS --------------------------- - Founder and CEO of software company, Anderson-Coates. Developed a fast, lightweight rules-based product configurator that facilitated the online ordering of complex high-tech products. Recruited and led a team to develop, sell and implement the system to customers including Cisco Systems. Anderson-Coates was acquired by e-commerce startup Comergent Technologies, which is today owned by IBM. - Vice President, R&D of startup SocialNet. Managed a team of 30 managers and individual contributors producing a social networking Web site for over a million users. Had staffing, planning, and budget responsibilities for R&D, QA, and IT departments. Helped the executive team raise $16M in funding. SocialNet was acquired by MatchNet (now Spark.com). - Vice President, R&D of Network Management Startup (in stealth mode). Recruited and managed the R&D and QA teams. Designed the architecture of a Java J2EE-based application for the ordering and provisioning of MPLS VPN network services within large Internet service providers and telephone companies. - Project Manager and Consultant. R&D, QA, and IT project management and software development for multiple projects and clients, including Cisco Systems, Hewlett-Packard, Netscape/Mozilla, 3Com, Sun Microsystems, and several startup companies. Projects include: CISCO SYSTEMS Responsible for the design, implementation and testing of Cisco’s first Web-based electronic commerce system. Created an encrypted channel of communications between several Cisco e-commerce applications and Cisco’s financial partners. Developed secure protocols to transmit sensitive business data over the Internet while ensuring authentication and guaranteed message delivery and integrity. Created Web-based e-commerce tools for pricing and product configuration. Created a Web-based rules engine for complex product configuration. Developed a secure “Web reflection” system to allow outside user access to sensitive e-commerce applications behind a firewall.  3COM (now Hewlett-Packard Enterprise) Created a system for the collection of point-of-sales data from channel partners. A desktop client running on a vendor's site collects sales reports on a customizable schedule and securely transmits them to corporate HQ. Created a proprietary, world-exportable public key encryption system based on the El Gamal algorithm.

Principal Unity Engineer with 18 years of professional game development experience delivering mobile, VR, multiplayer, AI-powered and cross-platform products. Career highlights include 20M+ game downloads, principal engineering leadership at Spin Master, shipping features for PAW Patrol, building VR training simulators, multiplayer voxel games, and production AI-powered interactive experiences: • 18 years of professional game development • 13+ years of Unity (C#) • 20M+ mobile game downloads • Principal Engineer at Spin Master • 5+ years VR development • Multiplayer architecture using Photon (PUN, Fusion) • Built AI-powered interactive experience combining LLM-based narrative generation, generative voice synthesis, and automated asset creation pipelines • Mobile / PC / VR / WebGL

Hi! I'm Satyam Rai, a results-driven React Native Mobile App Developer dedicated to building high-performance, cross-platform iOS and Android applications. With 20+ successful projects delivered, I specialize in translating complex client requirements and Figma designs into clean, scalable, and responsive code. Core Expertise Frameworks & Languages: React Native, JavaScript (ES6+), TypeScript, React.js State Management: Redux, Redux Toolkit, Context API Payment Gateways: Razorpay, Stripe, DECTA, CCAvenue, PayFast APIs & Real-Time Features: RESTful APIs, Google Maps API, Firebase, Audio/Video/Chat, Live GPS Tracking, Push Notifications UI/UX & Tooling: Android Studio, Xcode, Responsive Layouts, Performance Optimization Key Projects & Highlights My Rides (Ride-Hailing Dual Apps): Built front-end UIs for passenger and driver apps serving 50K+ users and 10K+ drivers in South Africa, integrated with PayFast & Google Maps APIs. Trustified (Lab Verification & Affiliate App): Developed an e-commerce & lab testing platform featuring blind testing reports, affiliate integration, and product verification workflows. Coral Leisure (Facility Booking Platform): Integrated secure payment gateways (Stripe/DECTA), real-time class booking systems, and QR code access control across 9+ venues. Astromoon & Agro Apps: Created interactive consultation platforms with real-time audio/video calls, domestic payment gateways (Razorpay/CCAvenue), and localized smart agriculture interfaces. Why Work With Me? Proven Track Record: 20+ projects completed across diverse industries (Ride-Hailing, Health/E-commerce, Leisure, AgriTech). Payment Integration Master: Deep hands-on experience integrating regional and global payment providers securely. Performance Focus: Clean code optimized for smooth 60 FPS performance and rapid load times. End-to-End Ownership: Dedicated to delivering top-tier quality from initial setup to store publishing. Let’s connect and discuss how I can help bring your mobile app vision to life!

I’m a full-stack developer who builds production applications across web, iOS, desktop, and backend systems. I currently lead product and development work on QuickFlight, an aviation platform that delivers real-time aircraft tracking, flight planning, weather briefings, and EFB tools. This work involves native iOS development, web interfaces, backend services, APIs, and real-time data systems. My experience includes: • Native iOS apps (Swift & SwiftUI) from design through App Store release • Web applications and interfaces • Backend services and API development • Desktop tools and internal systems • Real-time data integration and production deployments I prefer projects where I can own meaningful parts of the stack and deliver clean, maintainable code that actually ships. Whether you need a new application built, an existing system improved, or help connecting frontend and backend systems, I bring practical experience from real production work. Available for hourly and fixed-price projects. Happy to discuss your requirements.