Hire the best App Development Freelancers in Warsaw, PL

Check out App Development Freelancers in Warsaw, PL with the skills you need for your next job.
  • $57 hourly
    🏅 I began my journey in software development in 2012. 🏅 I have achieved success in launching startups and securing funding of $30 millions and more for SaaS applications. 🏅 My Team recognized as one of the best Software Firms in San Diego by Clutch. 🏅 70% of my clients are long-term. 💻 Why me? - I offer free technical consultations, no strings attached. - I provide a 6-months warranty period. - I don’t outsource work to third parties. I can help you conceptualize, build, and integrate complex software solutions. I never break the trust of my customers by unveiling any data related to their projects. I am willing to sign an NDA to ensure that your confidential information is protected. 💻 My areas of expertise include: - Web development - Mobile development (iOS and Android) - Desktop applications development (Windows and macOS) - UX/UI design From filling in gaps to full-cycle software development, I will get you covered. 💻Tech stack: - LANGUAGES: JavaScript, TypeScript, Python - FRONTEND FRAMEWORKS: Angular 2+, React.js, Vue.js FRONTEND TECHNOLOGIES: HTML5, CSS3, sass, Bootstrap, REST API, GraphQL API, Redux, RxJS, Vuex, Material UI, DOM Realtime And Messaging Technologies: RabitMQ, Socket.IO, WebRTC, Agora.io BACKEND FRAMEWORKS: Express, NestJS, Adonis.js, FeathersJS, Loopback, Django Rest Framework, Flask BACKEND TECHNOLOGIES: Node.js, PostgreSQL, MySQL, MongoDB, SQLite, Firebase, Redis, ElasticSearch MOBILE: React Native, Swift, JAVA, Kotlin, Ionic, Native-Script TRACKING SYSTEM: Trello, Jira SOURCE CONTROL: GIT ADDITIONAL: Ngnix, apache, pm2, Docker, Jenkins, AWS, DigitalOcean, Google Cloud, FCM, PUSHER Amazon Iot-core, Amazon EC2, Dynamo DB, AWS Elastic Beanstalk, AWS S3 My biggest motivation is to create value for clients. Over the years, I have helped hundreds of businesses to grow online. I have extensive experience in: - Finance - Healthcare - Manufacturing - Transport - Electronics - Education - Telecom - Construction - Music - Retail & eCommerce Contact me to get a free consultation on your software development project.
    vsuc_fltilesrefresh_TrophyIcon App Development
    Web Development
    SaaS Development
    Database
    Test-Driven Development
    Python
    React Native
    Swift
    Angular
    Object-Oriented Programming
    Lean Startup
    Startup Company
    Microservice
    Node.js
    React
    Web Design
  • $80 hourly
    Hello, I'm Sergii, a seasoned Bubble NoCode Developer, specializing in resolving complex and challenging tasks. I am the person clients seek after experiencing unsatisfactory results with other developers or agencies. I take pride in my ability to salvage projects where others have stumbled, converting them into success stories. Take a look at what my clients have to say about me: "Sergii did a great job picking up where someone else left off, and figuring out what needed to be done to bring it to completion..." Here's what you can anticipate when you choose to work with me: Prompt, timely delivery coupled with regular Loom video progress updates. Exceptionally intricate MVPs at every stage, designed to handle high complexity. Unparalleled advice in product development backed by years of experience. Expert navigation through projects others have deemed 'too difficult' or 'impossible'. My background and expertise encompass: Leading roles in Product and Project Management in multiple startups. In-depth passion for UX/UI design, a skill honed over countless successful projects. Skills: HTML5, Stripe, CSS3, Javascript, Python, Website Development, Web Application, Mobile Apps, Marketplace, CRM, Software Architecture & Design, Mobile App, API, Postman, Web Design, Prototyping, Figma, ChatGPT integration. I am not merely a senior developer; I am the problem solver you turn to when conventional methods fall short. I take on projects with high complexity that others might shy away from, bringing your ideas to life while ensuring stellar quality. Ready to turn the tide on your project? Reach out to me, and together, let's create something extraordinary.
    vsuc_fltilesrefresh_TrophyIcon App Development
    Payment Gateway Integration
    API
    Stripe
    FlutterFlow
    Bubble.io
    Web Development
    Figma
    JavaScript
  • $50 hourly
    I’m a Senior Frontend Developer with over 8 years of commercial experience. Technologies and tools I have worked with: ✔ React, Redux, Next.js TypeScript, REST API ✔ React Native ✔ AngularJS, Vue ✔ Storybook, Styleguidist ✔ JavaScript, jQuery ✔ HTML5, CSS3, Sass/LESS/CSS Modules/styled-components ✔ Responsive Web Design ✔ Bootstrap 3 and 4, Tailwind CSS, Bulma, Material Design ✔ Webpack/Grunt/Gulp ✔ Jira, Asana, Trello ✔ Postgres, MySQL, MongoDB ✔ Git, Bitbucket, SVN ✔ Basics of Photoshop and design I specialize in creating React apps. I follow React library development, so my code is always up to date. I use trending and known libraries to keep quality code and fully functional, good looking, fast rendering websites as well as web apps. I have experience in managing projects and people, planning, code reviewing, writing down tasks, onboarding new developers and mentoring. I put them in a test with many teams and we always managed to work with an attitude to finish the project, the whole team is proud of. Reasons to hire me: ✔ I communicate on every step of the development to meet your expectations with high quality and well-tested product. ✔ I am flexible with my working hours. ✔ I have a great passion for learning and I’m following the latest development standards. ✔ I always meet the deadline. ***** I'm a developer - not a coder. ***** I will not only produce code to implement features, but also give my own advises in terms of UX of the application. Let's make your app great together!
    vsuc_fltilesrefresh_TrophyIcon App Development
    Redux
    Project Management
    Web Application
    React Native
    TypeScript
    CMS Development
    Tailwind CSS
    Front-End Development
    Node.js
    React
    Web Design
    JavaScript
    Responsive Design
    CSS
  • $51 hourly
    Web&Mobile Applications RockStar is leading Upwork's awarded Team of Full-stack Developers with of 5 stars ⭐ and 100% JSS projects 🚀 Our team of experts: 🟢Awarded by Upwork 📣Multi-awarded by Clutch ❗Awarded by Payoneer 📰Mentioned in Forbes Tech Rock Star in: 💡 Web Development 💡 Mobile Development 💡 Product Concepting 💡 Product Design 💡 Quality Assurance Technology Stack & Tools 🖥 Front-End: JavaScript, React.js, React Native, Vue.js, Next.js, Nuxt,js ⌨️ Back-End: Python, Django, Flask, Sanic, Node.js, Express.js, Koa.js, Nest.js ⚙️ DevOps: AWS, GSP, Microsoft Azure, Docker, Docker Compose, Kubernetes, Ansible 💿 Database: MySQL, MongoDB, PostgreSQL, DynamoDB 📱UX/UI Design: Figma, Sketch, Adobe Creative Suite, Zeplin 🎯 Industries: 🎓EdTech 👩‍⚕️Healthcare 📊Fintech 📈Web3 Solutions 📒SaaS Applications 🔐Real-Estate 🧠AI Solutions 💳E-commerce 🏦ERP systems And more… Always for win-win solutions, a detail-oriented and flexible approach to development, meeting deadlines, and high-quality and fully tested software. Ready to meet new challenges and jump on the call. Drop me the Invitation and let’s develop the Software You Would Love! 🥁 Updated 3/9/2024
    vsuc_fltilesrefresh_TrophyIcon App Development
    NFT
    SaaS
    Web3
    iOS
    Android
    NFT Marketplace
    Web Development
    React Native
    React
    Product Design
    Mobile App Development
    Python
    JavaScript
    Django
  • $35 hourly
    Professional UX/UI Designer, CDO and co-founder of a company of high qualified specialists in Web/Mobile development and UX/UI Design called Niwart (niwart.io). We specialize in creating solutions for businesses of different sizes and spheres, and also help to transform our clients’ ideas into high-quality, modern, and competitive products. We focus on the end-to-end user-centered-driven process that includes detailed research, specification, and user flow creation in the first phase. Our process of a project creation (Design and Development): UX/UI Design: ✅ Discovery phase ✅ User Flow creation ✅ Wireframe creation ✅ Mockups ✅ Interactive prototype Development: ✅ Specification approval ✅ Project set-up ✅ Development ✅ Testing ✅ Launch Some information about me and our team: 🌟 5+ years of experience 🌟 10 + high qualified specialists 🌟 100 + successfully built projects of different complexity for various business spheres 🌟 90% of our clients are becoming long-term 🌟 100% satisfied clients all over the World About technologies we specialize in: 🔷 Programming languages: PHP, Python, JavaScript, Typescript, С#, Java 🔷 Frameworks: ReactJs, VueJs, Angular, NodeJs, Express, NestJs 🔷 Cloud Storage/DB: Mysql, MongoDB, Postgre SQL 🔷 CMS: Wordpress, Webflow, Opencart, Prestashop 🔷 Mobile Development (React Native, Flutter, Kotlin) For us, the most important is to meet all of our clients’ expectations, consult them based on our experience and help to make their business grow. I’m looking forward to discussing your project together and helping you implement your idea in Life!
    vsuc_fltilesrefresh_TrophyIcon App Development
    Ecommerce Website
    Vue.js
    Laravel
    Node.js
    React
    WordPress Development
    Product Design
    Webflow
    Web Design
    User Interface Design
    Mobile UI Design
    Web Development
    User Flow
    Figma
  • $80 hourly
    🌟 Unlock Next-Level AI, ML, and Cloud Solutions with an expert! 🎯 Enhance your business performance with state-of-the-art Artificial Intelligence, Machine Learning, and AWS cloud solutions, meticulously tailored to meet your unique industry needs. As a certified expert, I specialize in elevating operational efficiencies and generating actionable insights through technology. 🔍 Is your business not achieving its full potential due to outdated technologies or inefficient workflows? Leverage my expertise to break through these challenges, utilizing cutting-edge tech solutions that ensure significant improvements in both productivity and profitability. 📖 Beginning my journey as a curious computer science student, I quickly evolved into a tech enthusiast, driven by the potential of AI and software development. Over the years, I've successfully led numerous projects in sectors like finance, retail, healthcare, and technology, delivering innovative solutions that consistently exceed client expectations. 🔄 Partner with me to transform your business landscape—streamline processes, enhance data analysis, and improve customer interactions. My approach integrates advanced AI models, robust ML algorithms, and comprehensive cloud strategies to set new benchmarks in your industry. 🛠️ My services are designed to cater to a wide array of technical needs and include: 👉 Advanced AI Systems: I develop AI-powered applications tailored for specific business processes, enhancing decision-making and operational efficiency. 👉 Machine Learning Solutions: From predictive analytics to deep learning models, I create tools that adapt and evolve with your business needs. 👉 AWS and Cloud Services: As an AWS professional, I design, implement, and manage scalable cloud infrastructure that supports growth and ensures data security. 👉 Full-Stack Development: I offer end-to-end development services for both web and mobile platforms, focusing on creating seamless, user-friendly interfaces. 👉 Data Engineering: Utilize your data better with my custom data pipelines and architectures that simplify complex data processing and storage solutions. 👉 Tech Consulting: Need guidance on technology strategy? I provide consulting services to help align your tech investments with your business goals. 📩 Ready to transform your business with advanced technology? Contact me today to discuss how we can turn your tech challenges into competitive advantages! 📩
    vsuc_fltilesrefresh_TrophyIcon App Development
    Amazon Web Services
    AI Chatbot
    AI Implementation
    Mobile App Development
    OpenAI API
    AI Development
    AI Model Development
    Web Development
    Software Development
    Data Labeling
    Data Annotation
    Machine Learning
    Artificial Intelligence
    Google Cloud Platform
  • $50 hourly
    Sunmait is a US-based software development company with worldwide partners in 20+ countries and in-depth expertise in fintech and e-commerce. In a timely and professional manner, we partner with clients to grow their businesses by providing measurable results. From providing solution development services to establishing development centers, we solve all product development challenges through business-driven processes. We have implemented more than 140 successful projects in various industries. We are proud of our projects in fintech, blockchain (a government-level project), e-commerce, and others. Why Sunmait Technologies: - 7+ years in the WW software market - 150+ talented specialists in Europe and the US - 140+ successful projects worldwide - 4 WW offices in the USA, UAE, Poland, and Georgia - Work in a client-friendly time zone - Broad expertise in fintech and e-commerce - Flexible forms of cooperation
    vsuc_fltilesrefresh_TrophyIcon App Development
    QA Testing
    UX & UI
    Web Development
    Software
  • $35 hourly
    Seasoned software engineer with 7+ years of experience in building scalable and intuitive web and mobile applications. Recognized for leadership skills and a strong technical background, driving successful project delivery and mentoring junior developers. Built 3 enterprise level projects with cross functional teams. Experienced working with teams to produce impactful, leading-edge websites that engage customers and deliver business results.
    vsuc_fltilesrefresh_TrophyIcon App Development
    Web3
    TypeScript
    React Native
    React
    Angular
    Test-Driven Development
    Domain-Driven Design
    Web Application
    Mobile App
    Unit Testing
    Node.js
    Python
    Amazon Web Services
    JavaScript
  • $39 hourly
    I'm Albert Grzegrzółka, a highly skilled programmer with a passion for technology. I completed my education at Technischools and landed my first commercial project with Polski związek zapaśniczy (PZZ) at just 17 years old. Since then, I've led a team of six programmers in creating a revolutionary school application. I always strive for excellence and give 150% effort to every project. I'm constantly learning and developing my skills, and I'm here to deliver the best possible quality.
    vsuc_fltilesrefresh_TrophyIcon App Development
    App Design
    Database Design
    API Development
    JavaScript
    TypeScript
    Node.js
    Python
    PostgreSQL
  • $15 hourly
    A Prominent Software Development Firm Set your company up with high-quality software solutions from a trustworthy partner. Teams that can design, develop, space and scale your concept most effectively.
    vsuc_fltilesrefresh_TrophyIcon App Development
    Web Development
    UI/UX Prototyping
    Graphic Design
    Digital Marketing
    Software Development
    Software
  • $25 hourly
    🙋‍♂️Welcome to my profile ! I have 1000+ hours as a full-time Bubble.io developer, and have been building software, apps, and websites for the last 7 years. I have good experience working with many different APIs meaning that I can connect Bubble with OpenAI (ChatGPT), Google, Speech-to-text, text-to-speech, Gmail, Stripe, Zapier, Make and many other services. In the last couple of years I have fallen in love with Bubble and how quick and easy it makes it to create complex and beautiful pieces of software. I have experience using Xano which allows you to scale your Bubble app as you generate more users and revenue, and means you don't have to pay the high work unit costs that Bubble has. I have built, acquired customers, and sold a software business before so I have a solid understanding of not just the technical side of software, but also the commercial side. I work as a Bubble developer as I enjoy the technical side the most. Let's chat. I'm excited to learn about your business and see how I can help. Oliver
    vsuc_fltilesrefresh_TrophyIcon App Development
    Facebook
    ClickFunnels
    ManyChat
    Facebook Development
    Digital Marketing
    Figma
    Canva
    Ecommerce Website Development
    API
    iOS Development
    AI App Development
    SaaS Development
    Bubble.io
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