Hire the Best Amazon S3 Developers in Budapest, HU

I'm a senior software developer and Linux expert based in Budapest, Hungary. I run my own IT company, Serverguru Kft., and I currently manage 50+ Linux servers for clients in Canada, the US, the UK, Switzerland, and Hungary. Before returning to Hungary, I spent years in Los Angeles as a senior software engineer and co-owner of an internet business, so I understand both the technical side and the business side of a project. What I can do for you: - Backend development in Rust, Go, and Python: APIs, services, and tools that are fast and reliable - Web applications with React, TypeScript, and JavaScript, plus PHP and MySQL for existing sites - Mobile apps for Android and iOS with React Native and Expo - Linux server setup, hardening, and administration (Debian, Ubuntu) - Apache2 and Nginx web server configuration - Docker containers and Proxmox VE virtualization - ZFS storage pools, snapshots, and replication - Cloud hosting on AWS (EC2, S3, CloudFront), DigitalOcean, and Cloudflare - Automated daily offsite backups to Amazon S3, Backblaze B2, or other cloud storage - Monitoring and automation with Zabbix and Ansible - Fixing slow or hacked websites and making them faster and safer - Speeding up slow MySQL databases through query optimization and server tuning How I work: You deal with me directly from start to finish, with no account managers and no subcontractors. I write new code or improve your existing code, give honest estimates, and only take on work I know I can deliver. If a project isn't a good fit for my skills, I'll tell you up front. Send me a message with what you need, and let's talk about your project.

🥇 $1M+ earned | 100% JSS | 1,000+ projects | 18 years in Mobile Development 🤝 We build iOS and Cross-Platform Apps using Swift/Objective-C and React Native 🎓 From lean MVP to Top-rated product Hi there! I'm driving Mobile Development at NIX - a global software engineering partner with 32 years of overall experience and over 18 years in Hybrid App Development particularly, 60+ in-house mobile developers, and a portfolio of 1,000+ successful projects. We provide comprehensive development services and create apps for Smartphones, Tablets, Wearables, Web, and TV. We build from scratch products that increase engagement, retention, and revenue. And we help stabilise existing apps, increase performance, reduce crash rates, and improve overall stability. Let’s ensure your concept is validated for the real world and turn it into a top-rated iOS app that drives real ROI. ✅ We can help you with: ➜ Full-cycle custom iOS and React Native development, POC, and MVP creation. ➜ Dedicated teams and Staff Augmentation. ➜ Consulting/Speeding up time to market for new features or products through efficient architecture and scalable code. ➜ Legacy modernization, enhancing or refactoring existing applications, improving performance and user experience. ➜ Ongoing and post-production support, ensuring that your app continues to grow and adapt to user feedback or new updates. We utilise AI where it brings tangible value, accelerating our work on your projects and reducing operational time by up to 50% without compromising on architecture decisions, cybersecurity, or code quality. Notable project outcomes include: Supply Chain: Reduced spoilage by 15% by developing an IoT system to monitor cargo temperature and location. Marketplaces: Streamlined buying and selling processes by developing CarSoup (automotive) and HomesGo (real estate video tours). Healthcare and IoT: Created a diabetes management platform and built an IoT Telehealth app enabling orthopedic monitoring via an AR-based app. Fintech: Enabled instant microlending by building a "Credit as a Service" platform. Education: Optimised a 3D anatomy platform, reducing app size by 30–40%. Consumer Engagement: Increased engagement and retention level by rebuilding the Montel Energy Viewer app with SwiftUI, supported a 5-million-user AI-powered video app, and developed the Alienware Arena gaming portal. Infrastructure: Improved scalability and performance by refactoring the affirmation app. 🔹 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬: Platforms and Languages: iOS (Swift, Objective-C), React Native&Typescript. Payments & Subscriptions: PayPal, Stripe, Apple Pay. Communication: Real-time audio/video calls, live streaming with Socket, Firebase, Twilio, and Agora. In-App Features: Push Notifications, QR & Barcode Scanner, Image Recognition, Map Integration. Geolocation: Google Maps, real-time. Security: 2FA, OAuth. App Store: Publish and update apps on Google Play Store & Apple App Store with compliance. Maintenance and Optimisation: Bug fixing, feature upgrades, stabilisation. Why Clients Choose NIX: 🏆 18+ years in Mobile Development | $1M+ earned on Upwork | 100% Job Success. 🛠 Full-Cycle Expertise: From bold idea to go-to-market strategies. ⚡ Fast & clear communication: Always aligned & transparent. 🧪 Flexibility: From Prototype to scaling products to millions of users. 📅 Available to start immediately. Let’s schedule a 30-min discovery call where I’ll help you evaluate your idea, define the right strategy, and outline a roadmap to bring your product to life.

Senior C/C++ engineer with 25+ years of experience in cross-platform software development (Windows/Linux) and POS integrations. Strong background in fiscalization and compliance-driven systems, including device drivers, receipt/printing pipelines, and transaction reliability for multi-country deployments (20+ markets). Expert in cashless payment drivers and payment workflows, as well as POS feature integrations such as loyalty systems and lottery flows. Hands-on experience bridging low-level components (C/C++, device protocols, Qt printing) with service/back-end layers (Go/Rust, REST) and operational data storage (PostgreSQL/MySQL). Known for building long-lived, maintainable production systems, deep debugging of complex field issues, and delivering stable solutions under strict legal and operational constraints. Hands-on experience with ESP32 and Raspberry Pi hardware/software development, including edge connectivity (Wi-Fi/BLE/MQTT), peripheral integration, and resilient device control. Applied OpenAI Codex CLI, Google Gemini CLI, VS Code, Cursor, and Google Antigravity to accelerate prototyping, refactoring, test scaffolding, and technical documentation in production workflows. CORE TECHNICAL STACK: •Domains: POS Integrations; Fiscalization & Compliance; Payments (EFT/POS, cashless/QR); Loyalty; Lottery; Receipt/Printing; Localization. •Languages: C, C++, C#, Java, Go, Rust (REST services), Delphi, JavaScript (POS/Kiosk business logic), Python, Lua, Tcl/Tk. •Frameworks/Libraries: Qt 5/6 (custom static builds); Boost. •OS: Windows, Linux. •Build/Tools: CMake, Git, MSVC, GCC, YACC/BISON. •Protocols/Device I/O: Serial/RS-232; TCP/IP networking; device/printer protocol integration; JSON/XML transaction payloads. •Embedded/IoT: ESP32 (ESP-IDF, FreeRTOS), Raspberry Pi (Linux edge services), UART/SPI/I2C, GPIO, MQTT, OTA updates. •Data/Storage: PostgreSQL; MySQL; Amazon S3 (receipt storage/optimization); Paradox (legacy). •AI Engineering Tools: OpenAI Codex CLI, Google Gemini CLI, VS Code, Cursor, Google Antigravity (code generation, debugging support, test scaffolding, documentation).