I am an innovative and results-driven software engineer with 18 years of experience across augmented reality, performance optimization, and object-oriented programming. I...
See MorePost a project and get matched with App Developers in Seattle, United States. Matched in 24 hours. No agency fees.
Trusted by 10,000+ companies of all sizes
Available now
Every App Developer's portfolio and application is manually reviewed by our Customer Success team. You only see vetted matches.
I am an innovative and results-driven software engineer with 18 years of experience across augmented reality, performance optimization, and object-oriented programming. I...
See MoreHi, I'm Mitchell Melby, a software engineer focused on building reliable mobile and web apps for real-world field operations. I served as the sole cross-platform develope...
See MoreVersatile digital builder with experience in app and cloud development, CMS setups, and data scraping. I create content that ranks, optimize SEO, and manage social media ...
See MoreHi, I’m Mohamed Yuusuf – a passionate Full Stack Developer with a sharp eye for detail and a heart for problem-solving.
See MoreBased in Seattle, United States, I'm an App Developer expert. I take a clear, collaborative approach to every brief.
See MoreSenior Software Engineer helping businesses doing the right things the right way. Problem identification, user-centrism, performance, & tool mastership. EDUCATION Master...
See MoreI'm an AI technical consultant and software engineer with 5+ years building AI-powered apps, chatbots, and scalable backends. I specialize in NLP, multilingual and RTL su...
See MoreI'm Leo Nomie, a Senior Full-Stack Engineer with 12+ years of experience delivering production-grade microservices, healthcare platforms, and enterprise SaaS across finte...
See MoreI'm Steven Rohr, a lead software engineer specializing in production-grade Generative AI systems—autonomous agents, RAG, and LLM tool/function calling—built in Python and...
See MoreI'm an App Developer working from Seattle, United States. My focus is .NET, AWS, and C#, and I'm always keen to jump into a well-scoped brief.
See MoreHi, I’m Priyanka Patel, a Senior Android engineer with a focus on shipping consumer apps and wearable companion experiences. I specialize in Kotlin, Jetpack Compose, MVVM...
See MoreiOS and Unity Dev
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.
We've got more than App Developers in Seattle, United States
or widen your search to App Developers in United States
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
$5,500 – $15,000
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 skilled professional responsible for designing, coding, testing, and maintaining applications for mobile devices or desktop platforms. They work with various programming languages, frameworks, and tools to create user-friendly and functional applications that meet client requirements. Key responsibilities include:
App Developers are crucial for businesses looking to enhance their digital presence and improve user engagement through innovative applications.
Exceptional App Developers possess a unique blend of technical proficiency and soft skills that distinguish them in the industry. Key qualities include:
These qualities not only enhance their work but also contribute to successful project outcomes and client satisfaction.
Typical day rates for App Developers in United States vary by experience level:
These are indicative ranges based on Twine project data. Final budgets depend on project scope and are agreed directly with your freelancer.
Recognizing the perfect App Developer for your project requires a careful evaluation of their skills, experience, and fit within your team. Start by reviewing their portfolio to assess the quality and relevance of their previous work. Conduct interviews to gauge their problem-solving abilities and communication skills. Additionally, consider the following:
By taking these factors into account, you can identify a developer who will meet your project demands effectively.
Conducting an effective interview with potential App Developers is crucial in assessing their suitability for your project. Consider asking the following key questions:
These questions will help you gauge their skills, experience, and alignment with your project needs.
Hiring an App Developer in Seattle involves a strategic approach to ensure you find the right talent for your project. Begin by defining your project requirements, including the scope, timeline, and budget. Utilize platforms like Twine to access a diverse pool of vetted App Developers. Here are steps to follow:
By following these steps, you can successfully hire an App Developer who aligns with your project vision and goals.
When deciding between hiring a freelance App Developer and working with an agency in Seattle, consider the following differences:
Understanding these differences can help you make an informed decision that aligns with your project goals.
A well-crafted project brief or job description is vital for attracting the right App Developers. Include the following elements:
A comprehensive project brief helps set clear expectations, facilitates better candidate matching, and enhances the likelihood of project success.
Hiring on Twine is simple.
Post your project and meet your expert within 24 hours. Over 45,000+ high growth companies that trust Twine.