Hire the best Mobile App Developers in Lodz, PL
Check out Mobile App Developers in Lodz, PL with the skills you need for your next job.
- $75 hourly
- 5.0/5
- (34 jobs)
Hello! I’m Alexander, a full-stack developer with 15+ years of experience in delivering high-quality web and mobile applications. I specialize in API development and integrations, building seamless connections across platforms and systems. With over 150 successful projects completed worldwide, I focus on delivering scalable, secure, and business-oriented solutions. If you’re looking for a reliable partner to handle your project from start to finish, I’m here to help. 𝗠𝗬 𝗧𝗘𝗖𝗛𝗡𝗜𝗖𝗔𝗟 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 (areas marked with an asterisk (*) are those I am currently studying to enhance my programming skills and develop experience): 𝗠𝗢𝗕𝗜𝗟𝗘 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧: • Flutter, Dart, Android, Java, Kotlin, Xcode, Firebase • State Management: Riverpod, BloC 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧: • PHP8, Yii2, Node.js • Laravel*, Symfony* 𝗪𝗘𝗕𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦 / 𝗔𝗣𝗜 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 / 𝗔𝗣𝗜 𝗜𝗡𝗧𝗘𝗚𝗥𝗔𝗧𝗜𝗢𝗡: • REST API (PHP, Node.js), Swagger / OpenAPI, JSON, XML, SOAP (Data Formats) • 3rd Party APIs: ChatGPT, Google, Yandex, 2GIS, VK, and other well-documented APIs • gRPC (High Performance)*, Go (Concurrency)*, Fiber (Web Framework)* 𝗙𝗥𝗢𝗡𝗧𝗘𝗡𝗗 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧: • HTML5, SCSS, Flexbox, CSS3, Bootstrap 5 (Responsive Design) • TypeScript, JavaScript (ES6) • Vite, Webpack (Module Bundlers) • npm, Bower (Package Management) • jQuery, Pixi.js (Animations, Interactive Content) • Vue.js*, Nuxt.js*, Pinia (State Management)* 𝗗𝗔𝗧𝗔𝗕𝗔𝗦𝗘𝗦: • MariaDB, MySQL, SQL, Indexes, Structure Optimization • OpenSearch, Elasticsearch, Sphinx • Redis, Memcached, MongoDB • Neo4j • PostgreSQL* 𝗛𝗢𝗦𝗧𝗜𝗡𝗚 𝗣𝗥𝗢𝗩𝗜𝗗𝗘𝗥𝗦: • DigitalOcean, Hetzner, Selectel • VPS, VDS, Cloud Hosting 𝗪𝗘𝗕 𝗦𝗘𝗥𝗩𝗘𝗥𝗦: • Nginx, PHP-FPM, HTTP/2, SSL (Let's Encrypt) • Nginx with HTTP/3 (QUIC)*, Varnish* 𝗣𝗔𝗥𝗦𝗜𝗡𝗚 / 𝗗𝗔𝗧𝗔 𝗦𝗖𝗥𝗔𝗣𝗣𝗜𝗡𝗚: • PHP (cURL, DOM Crawler) • Complex Parsing Techniques (Regular Expressions, XPath) • Browser Automation (Selenium, Puppeteer) • Optimization (Proxies, Parallel Processes, CAPTCHA Bypass) 𝗠𝗔𝗣 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 & 𝗜𝗡𝗧𝗘𝗚𝗥𝗔𝗧𝗜𝗢𝗡: • Google Maps, OpenStreetMap, Leaflet, Yandex Maps 𝗡𝗢𝗧𝗜𝗙𝗜𝗖𝗔𝗧𝗜𝗢𝗡𝗦: • Firebase, Telegram, Email, SMS, Web Push API 𝗘𝗠𝗔𝗜𝗟 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦: • Brevo, MailerSend, Mailgun, Google, Yandex 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧𝗨𝗥𝗘 𝗣𝗔𝗧𝗧𝗘𝗥𝗡𝗦: • MVC • Microservices* 𝗕𝗥𝗢𝗪𝗦𝗘𝗥 𝗘𝗫𝗧𝗘𝗡𝗦𝗜𝗢𝗡𝗦: • TypeScript, SCSS, Vite • Chrome, Brave 𝗕𝗔𝗖𝗞𝗚𝗥𝗢𝗨𝗡𝗗 𝗧𝗔𝗦𝗞𝗦: • Cron, Supervisor, Systemd • Apache Kafka*, RabbitMQ* 𝗜𝗡𝗙𝗥𝗔𝗦𝗧𝗥𝗨𝗖𝗧𝗨𝗥𝗘 & 𝗗𝗘𝗣𝗟𝗢𝗬𝗠𝗘𝗡𝗧: • Docker & Kubernetes* • CI/CD Pipelines (GitLab CI, GitHub Actions)* 𝗣𝗔𝗚𝗘 𝗟𝗢𝗔𝗗 𝗢𝗣𝗧𝗜𝗠𝗜𝗭𝗔𝗧𝗜𝗢𝗡: • Bundling, Lazy Loading (Images, Videos), GZIP • Web Server Tuning, CDN 𝗖𝗔𝗖𝗛𝗜𝗡𝗚 𝗦𝗧𝗥𝗔𝗧𝗘𝗚𝗜𝗘𝗦: • Query, Page Fragment, Full-Page, Object (Redis, Memcached) • HTTP (ETag, Last-Modified), API, Session Caching 𝗦𝗘𝗢: • Clean URLs, Canonical Tags, Optimized Routes • Auto-Generated Sitemaps • Multilingual Support • Open Graph, Schema.org, JSON-LD Markup 𝗠𝗨𝗟𝗧𝗜-𝗟𝗔𝗡𝗚𝗨𝗔𝗚𝗘 𝗦𝗨𝗣𝗣𝗢𝗥𝗧: • Flutter and Web Applications • Support for an Unlimited Number of Languages 𝗥𝗘𝗔𝗟-𝗧𝗜𝗠𝗘 𝗙𝗘𝗔𝗧𝗨𝗥𝗘𝗦: • Chat: Yii2, Node.js, Redis, Socket.IO • AJAX • Firebase • WebRTC, WebSockets 𝗢𝗣𝗘𝗥𝗔𝗧𝗜𝗡𝗚 𝗦𝗬𝗦𝗧𝗘𝗠𝗦: • macOS 14, Ubuntu 24, Windows 11 𝗦𝗖𝗥𝗜𝗣𝗧𝗜𝗡𝗚: • Bash, Perl 𝗗𝗢𝗖𝗨𝗠𝗘𝗡𝗧 𝗔𝗨𝗧𝗢𝗠𝗔𝗧𝗜𝗢𝗡: • PHPWord, PHPOffice, LibreOffice, wkhtmltopdf 𝗩𝗘𝗥𝗦𝗜𝗢𝗡 𝗖𝗢𝗡𝗧𝗥𝗢𝗟 𝗦𝗬𝗦𝗧𝗘𝗠𝗦: • Git, GitLab, GitHub 𝗗𝗔𝗧𝗔 𝗩𝗜𝗦𝗨𝗔𝗟𝗜𝗭𝗔𝗧𝗜𝗢𝗡: • Chart.js, D3.js, GoJS 𝗖𝗢𝗗𝗘 𝗧𝗘𝗦𝗧𝗜𝗡𝗚: • Xdebug, Codeception, PHPUnit • Cypress* 𝗣𝗔𝗬𝗠𝗘𝗡𝗧 𝗦𝗬𝗦𝗧𝗘𝗠𝗦: • Stripe, YooKassa, Bank Systems, or Any Other with Good Documentation 𝗦𝗘𝗖𝗨𝗥𝗜𝗧𝗬: • Two-Factor Authentication, Google Authenticator, QR Codes, SMS 𝗠𝗔𝗖𝗛𝗜𝗡𝗘 𝗧𝗥𝗔𝗡𝗦𝗟𝗔𝗧𝗜𝗢𝗡 𝗔𝗣𝗜: • Google Translate, Yandex Translate 𝗚𝗥𝗔𝗣𝗛𝗜𝗖 𝗗𝗘𝗦𝗜𝗚𝗡 𝗧𝗢𝗢𝗟𝗦: • Photoshop, Illustrator, InDesign, CorelDRAW, Figma, Canva 𝗩𝗜𝗗𝗘𝗢 𝗘𝗗𝗜𝗧𝗜𝗡𝗚: • Adobe Premiere Pro 𝗗𝗔𝗧𝗔 𝗔𝗡𝗔𝗟𝗬𝗦𝗜𝗦 & 𝗖𝗔𝗟𝗖𝗨𝗟𝗔𝗧𝗜𝗢𝗡𝗦: • Microsoft Excel 𝗔𝗜 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧: • Python* 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 𝗜'𝗠 𝗣𝗔𝗦𝗦𝗜𝗢𝗡𝗔𝗧𝗘 𝗔𝗕𝗢𝗨𝗧: I’m looking for projects where I can bring the most value with my expertise: • Web & Mobile – Fast websites, mobile apps, custom APIs • Data & Automation – Parsers, scrapers, browser extensions • SaaS & Startups – MVPs, scalable systems, backend solutions • Enterprise – Secure, large-scale corporate & government projects • Game Dev* (exploring) – New interactive experiences If you're looking for a dedicated developer who combines technical excellence with business insight, feel free to reach out. Let's discuss how I can contribute to the success of your next project. Best regards, AlexanderMobile App Development
PHPFlutterFront-End DevelopmentBack-End DevelopmentPayment Gateway IntegrationDocument AutomationData ScrapingGoogle Chrome ExtensionDatabase ArchitectureWeb Services DevelopmentAPI IntegrationAPI DevelopmentWeb DevelopmentFull-Stack Development - $55 hourly
- 5.0/5
- (12 jobs)
I'm a dedicated Cross-Platform Mobile Developer with a robust focus on Flutter and Dart, paired with extensive backend experience primarily in Python ( Flask & Django ). My expertise encompasses developing scalable and efficient applications that leverage clean architecture and incorporate complex features tailored to meet modern business and user needs. Mobile Development Expertise: Over the past 4 years i've built and published over 12 mobile apps for my clients all over the world. I specialise in bringing ideas to life using Flutter with Dart. I excel at integrating advanced features such as Bluetooth Low Energy (BLE), Payments, In-App Subscriptions, and IoT functionalities into applications, ensuring a seamless user experience across iOS and Android platforms. Beyond Flutter development, I am adept at writing native iOS and Android code and proficient in bridging these with Flutter through method channels, enhancing the capabilities and performance of mobile applications. My contributions extend to the creation of libraries and plugins, significantly streamlining the development process and enabling reusable, efficient code for various projects. Backend Development Skills: My backend development skill set is centered around Python, with a keen focus on utilizing frameworks such as Flask and Django to create robust and scalable backend solutions. I have hands-on experience with PostgreSQL for database management, Docker for containerisation, and AWS and Linode for cloud services. Additionally, my work frequently involves integrating AWS S3 for efficient data storage and management, ensuring high performance and reliability of backend systems.Mobile App Development
EnglishFlaskDatabaseApple XcodePythonPostgreSQLiOS DevelopmentAndroid App DevelopmentApplication SecurityPayment FunctionalityFlutterDartLocation-Based ServiceSwiftIn-App Purchases - $60 hourly
- 5.0/5
- (33 jobs)
Welcome to my profile! I’m a CTO and full-stack development expert with more than 12 years of experience in the field. I am keen on cutting-edge technologies and helping businesses achieve their objectives. But, as a technical expert, I also embed my unique approach to working with clients: Solid requirements analysis and elicitation - Offering at least a couple of project scope realization options - Visualization of the possible technical strategy in a format of an architecture scheme - Preparation of the Technical Vision Recently I’ve been involved in a bunch of complex software and architecture-aimed researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide: Technological stacks: - Java - JavaScript - .NET - PHP - Python - Ruby - iOS - Android Domains: - Retail - Construction and Real Estate - Aviation, Tourism, Travel - Entertainment and Social networking - Marketing and Advertising - Fintech - Insurance - Industrial - HoReCa - Mental health and Healthcare - Management Project types: - ERP, CRM, POS - Complex web systems - Web application - Website - Mobile application - Standalone module, Framework, SDK - Proof of Concept - Companion mobile app (to comply with an existing web/desktop software) I’m open to both consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss any project concept realization, I am sure I will have valuable and interesting ideas to share with you!Mobile App Development
Ecommerce Website DevelopmentAPI IntegrationDatabase ArchitectureWeb DevelopmentEducational SoftwareHealthcare SoftwareService Cloud DevelopmentEnterprise Resource PlanningFinancial SoftwareEvent, Travel & Hospitality SoftwareCustomer Relationship ManagementInternet of ThingsPoint of Sale & Payment Systems - $35 hourly
- 0.0/5
- (3 jobs)
🌟 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐢𝐞𝐬: Denys is a great contractor - very capable and eager to get the job done properly. He communicates well and is knowledgeable - ⭐⭐⭐⭐⭐ I can honestly recommend Denys as developer and the most responsible, proactive freelancer I’ve ever met. Quick answers and responses, step by step demo calls, fair price, strong skillset, fluent English - ⭐⭐⭐⭐⭐ ⚡️𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐭𝐡𝐚𝐭 𝐈 𝐨𝐟𝐟𝐞𝐫 𝗙𝘂𝗹𝗹-𝗖𝘆𝗰𝗹𝗲 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: From concept to ongoing support, I handle the entire lifecycle of your web and mobile products, ensuring stability and reliability at every step. 𝐌𝐕𝐏 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Turn your startup's vision into reality with my expertise in creating outstanding Minimum Viable Products (MVPs) that set you apart in the marketplace. 𝐔𝐗/𝐔𝐈 𝐃𝐞𝐬𝐢𝐠𝐧: My design specialists create intuitive, visually appealing user interfaces that enhance both the look, feel, and functionality of your product, ensuring a seamless user experience. 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐀𝐈 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬: I can also implement advanced artificial intelligence capabilities, including: 🔶 LangChain LLM application development 🔶 Custom GPT development and deployment 🔶 Integration with ChatGPT 🔶 Development of AI-based chatbots and copilots 𝐖𝐡𝐨 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: 🚀 Startups – take your idea through the startup lifecycle within a reasonable budget and timeline. 🙋 Small and Medium Businesses – acquire software excellence to boost your current product. 𝐌𝐲 𝐭𝐨𝐩 𝐩𝐫𝐢𝐨𝐫𝐢𝐭𝐲 is ensuring that every client is completely satisfied with our work. Mobile app development | iOS app development | Android app development | React Native app development | Flutter app development | Cross-platform app development | Hybrid app development | Mobile app design | App performance optimization | Feature integration | UI/UX for mobile apps | App scalability | Full-cycle mobile app development and marketing | Mobile app development and launch strategy | End-to-end mobile app development | Mobile app design | App development and user acquisition | App performance | Cross-platform app development | Mobile app development | Custom mobile app development | Mobile app development | Mobile app UX/UI design | App development | Firebase integration | AWS mobile services | Push notifications | API integration | Mobile backend integrationMobile App Development
Application Integration SoftwareAPI DevelopmentMobile App LocalizationMobile App Bug FixNode.jsMobile WebFull-Stack DevelopmentFront-End DevelopmentAI Mobile App DevelopmentMobile AppReact NativeReact - $40 hourly
- 0.0/5
- (0 jobs)
I am Mobile Developer with 2 years experience in creating mobile apps using Flutter. I am also developing my design skills to focus better on user experience.Mobile App Development
DartFlutter - $26 hourly
- 5.0/5
- (1 job)
Passionate and dedicated web developer with over 3 years of experience in web and mobile app development. Specializing in React and React Native, I continuously explore new technologies to deliver innovative solutions. With a strong focus on code quality and flexibility, my expertise covers a wide range of technologies including HTML/CSS, JavaScript, TypeScript, Material UI, Redux, and more. I have successfully collaborated on various projects, ranging from smart home systems to mobile apps, consistently delivering high-quality results. I bring not only technical skills but also strong communication abilities and a commitment to continuous learning to every project I undertake.Mobile App Development
React NativeAutomated TestingFront-End DevelopmentScrumAnimation SoftwareCanvasNode.jsNestJSCSSTypeScriptReactHTMLGitJavaScript Want to browse more freelancers?
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