Hi there! I'm Vadzim Tsupryk, a frontend and Shopify-focused developer with 11+ years of professional experience. I specialize in building robust, scalable web apps and S...
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Hi there! I'm Vadzim Tsupryk, a frontend and Shopify-focused developer with 11+ years of professional experience. I specialize in building robust, scalable web apps and S...
See MoreCurrently working as a WordPress Developer, collaborating with a broad spectrum of clients to create high-performing websites and e-commerce platforms. Core competencies ...
See MoreI'm Artsem Kononovich, a Full Stack Developer building scalable 3D editor tools and data-driven SaaS platforms. I have 8+ years of experience creating 3D editors, configu...
See MoreSenior Full-Stack Developer with 10+ years of experience building scalable web applications and backend APIs using React, Next.js, TypeScript, and Node.js. I specialize i...
See MoreI am an Android Developer with experience building and maintaining Kotlin-based applications that boast 1M+ installs in production. I prioritize Clean Architecture and MV...
See MoreComputer Science graduate and software development intern with experience across QA testing, web development (React/Node/Django), and Python automation. I enjoy building ...
See MoreAn aviation graduate with a strong background in digital marketing and project management. I have practical skills in creating digital products (my own JUTRAVEL app) and ...
See MoreHi, I'm Michał Bartnik, a Flutter-focused mobile software developer with a strong background in cross-platform applications (Android and iOS). I enjoy building scalable, ...
See MoreHi there! I’m a backend engineer with 12+ years of experience building and scaling high-load systems across GameDev, Real Estate, and Web3. I specialize in modern PHP (Sy...
See MoreNearly 4 years of experience as a .NET developer, working on multiple projects from internal business applications to multi-app solutions for international clients. Fast ...
See MoreSenior Flutter developer with 7+ years of experience building fast, scalable, and user-friendly mobile applications for Android and iOS. I specialize in enterprise-grade ...
See MoreI'm an experienced App Developer based in Warsaw, Poland. I specialise in API, App Design, and iOS and enjoy helping teams turn ideas into polished work.
See MoreWe have over 14,500 App Developers who've worked in many different industries and cover various styles and skillsets.
Start your searchProjects that brands and startups post most often.
End-to-end build of a v1 product: front-end, back-end, and deployment.
Build your MVPShort engagement to clear a backlog of bugs and stabilise a release.
Stabilise your releaseAdd LLM-powered features to your product, copilots, semantic search, or summarisation.
Integrate AIReact Native or Flutter app for iOS and Android from your existing spec.
Build your appDevelopment specialisms and the cross-functional roles you'll often hire alongside.
Reviews
“Ritik has done a good job in developing and publishing mobile app and his production support after deployment is helping me to manage app better.”
Abhijeet @ Yoday
Jul 27, 2026
“We had a great experience working with Nitin Jha. He is a skilled Flutter Developer who quickly understood our requirements and delivered a high-quality, user-friendly mobile application on time. His professionalism, technical expertise, and responsiveness throughout the project were outstanding. We highly recommend Nitin...”
sapna @ jemini
Jul 26, 2026
“Mark Scicluna is a great developer. I confidently endorse Mark’s capabilities and character.”
Theodore @ Rhizomenet Pty. Ltd.
Jul 24, 2026
“*"Working with Piyush was a smooth experience. He delivered a clean, professional website on time and was responsive throughout the project. Highly recommended for anyone looking for quality web development services."*.”
shraddha @ swastik clinic
Jul 23, 2026
“Jaskaran singh built my website from start to finish, and the entire process was smooth and professional. He understood exactly what I needed, delivered on time, and the final result exceeded my expectations. The site looks clean, works flawlessly, and was exactly what my business needed. I highly recommend him to anyone...”
tirath @ tirath electronics
Jul 15, 2026
“Omais is a highly skilled and reliable freelancer who did a fantastic job on my Web App project. I trusted him with complex technical tasks, including working directly within a Windows Server VPS environment, and he handled everything seamlessly. He is professional, efficient, and delivers great results. I highly recommend...”
Julio @ Two Brothers Flooring, LLC
Jul 13, 2026

Clients Rate Twine App Developers 4.97 / 5.0
on average across 917917 reviews
3–5 minutes. Tell us about your project, your timeline, and how you want experts to contact you.
Within 24 hours, you'll see a shortlist of vetted App Developers matched to your project.
Flexible payments on your terms, bill experts directly or use the Twine vault for added security.
Transparent rates, no hidden markup, and a payment path for every need.
Agencies bury a 20–40% markup inside the retainer, you never see it. On Twine, you set the price and you see the platform fee as a separate, explicit line. No surprises at checkout.
Prefer your own payment flow? Pay your expert outside Twine, incurring no commission fees. Most useful for ongoing or trusted relationships.
Funds are held in escrow and only released when you approve the deliverables. If the work isn't right, your money doesn't move. 10% commission on payments up to $10,000, just 5% on anything above.
Pick the role, the experience level and how long you need. We’ll show you what similar projects have cost on Twine. It’s a guide, not a quote.
Estimates only. Actual budget is set by you and agreed with your expert before any work begins.
ESTIMATED RANGE
zł10,500 – zł28,000
Full possible range for a mid-level App Developer over 2–4 weeks
Common questions answered before you post a project.
An App Developer is a professional responsible for designing, coding, and maintaining applications for mobile devices and computers. They typically work with various programming languages such as Swift, Java, and Kotlin to create user-friendly interfaces and robust functionality. App Developers collaborate with designers, product managers, and other stakeholders to ensure that the final product meets user needs and business objectives. They also conduct testing and debugging to resolve any issues, ensuring a seamless user experience. Additionally, App Developers stay updated with industry trends and emerging technologies to enhance their skills and adapt applications to new platforms and devices.
Hiring an App Developer in Poland involves several key steps. Start by defining your project requirements, including the app’s purpose, target audience, and desired features. Next, create a detailed job description outlining these requirements and the necessary skills. You can post this job on various platforms, including Twine, which specializes in connecting clients with freelancers. Additionally, networking within the tech community in Poland or using specialized recruitment agencies can help you find suitable candidates. Review portfolios and conduct interviews to assess their skills, experience, and cultural fit before making your decision.
The cost to hire an App Developer in Poland varies based on experience levels. Here’s a breakdown of expected rates:
These rates can fluctuate based on the complexity of the project and the developer's expertise.
Exceptional App Developers possess a combination of technical skills, creativity, and effective communication abilities. They are proficient in various programming languages and frameworks, enabling them to create innovative solutions. Strong problem-solving skills are essential, as they must troubleshoot issues efficiently. Additionally, great App Developers are detail-oriented, ensuring that their code is clean and maintainable. They also demonstrate adaptability, staying current with industry trends and technologies. Beyond technical skills, effective communication is crucial for understanding client needs and collaborating with team members, making them valuable assets to any project.
To recognize the perfect App Developer for your needs in Poland, start by reviewing their portfolio. Look for projects that align with your requirements and industry. Evaluate their technical skills through coding tests or technical interviews to ensure proficiency in relevant languages and frameworks. Consider their experience level and background, paying attention to any specific expertise in mobile or web applications. Additionally, assess their communication style and cultural fit by conducting interviews, as these factors influence collaboration. Finally, check references or client reviews to gain insights into their work ethic and reliability.
When interviewing an App Developer, ask key questions to assess their skills and fit. Consider the following:
These questions will help you gauge their technical expertise, problem-solving abilities, and communication skills.
Hiring a freelance App Developer typically offers more flexibility and potentially lower costs compared to working with an agency. Freelancers often have specific expertise and can be more responsive to individual project needs. However, agencies provide a broader range of services, including project management and access to a team of developers with diverse skills. This can be beneficial for larger projects requiring varied expertise. Additionally, agencies usually have established processes and quality controls in place, providing a more structured approach. Ultimately, the choice depends on your project's scope, budget, and desired level of involvement.
An effective project brief or job description for an App Developer should include several key components:
Including these elements ensures clarity and helps attract suitable candidates.
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