Hire the best Web Application Developers in South Korea

Check out Web Application Developers in South Korea with the skills you need for your next job.

Get started

$35 hourly
Scott H.
- 5.0/5
- (3 jobs)
I'm a full-stack web developer with experience building front and back end systems for startups and medium sized businesses. ○ I have experience in React, React Native, Svelte, CSS, JavaScript, PHP, Node.js, Python, and SQL ○ I'm talented at explaining difficult concepts in simple terms ○ I'll pay attention to the details to make sure the final product is professional and bug-free

Web Application
React Native
Svelte
SQL
Responsive Design
Node.js
CSS 3
CSS
HTML
React
Python
JavaScript
Web Development
$46 hourly
Yujin, Ginny G.
- 5.0/5
- (1 job)
• Figma, Framer, Illustration • Website/Mobile Design Hi, I’m a product designer passionate about creating meaningful, user-friendly experiences. I’ve had the opportunity to work with luxury brands like CHANEL, Louis Vuitton, and GIVENCHY, blending creativity with a strong focus on user needs. My background spans website and app design, combining elegant visuals with smooth, intuitive functionality. Today, I bring that same thoughtful, detail-oriented approach to every project — whether it's building a polished landing page, designing a mobile app, or crafting a new web experience. If you're looking for someone who can translate ideas into clean, engaging designs, I'd love to connect! Skills: - UX Design (Research, Wireframing, Rapid Prototyping, User Flows, User Testing, etc.) - Web design - iOS and Android mobile app design - Illustrations - Graphic design - Typography Tools: - Figma - Framer - Adobe Illustrator - Adobe Photoshop - XD - Procreate

Web Application
UI/UX Prototyping
Graphic Design
Illustration
Figma
User Interface Design
User Experience
UI Graphics
App Design
Web UI
UX & UI
$39 hourly
Jaehyeon P.
- 5.0/5
- (1 job)
Hello, world! - Specialized in cloud-native application - Hobbyist open-sourcerer (#YetAnotherOpenSourcerer) - Student Regards, Jaehyeon Park

Web Application
Subtitles
Korean
English to Korean Translation
Photo Editing
Cloud Engineering
International Development
Artificial Intelligence
$120 hourly
Lidia K.
- 5.0/5
- (18 jobs)
I don’t build MVPs. Why? Because building a quick MVP to test market fit is very different from building systems that are scalable, robust, and ready for real-world production. I focus on the latter. Clients come to me when: • Their MVP works fine for testing, but it’s underdeveloped to handle bigger traffic and real users. • They have an old system with so much technical debt that it’s getting in the way of scaling up or adding new features. • They have an existing system and want to integrate new AI-based tools seamlessly into it. What I do: ✅ Evaluate your existing system and logic – no matter how convoluted it is ✅ Quickly identify bottlenecks in legacy systems or underdeveloped products ✅ Design solutions to optimize your codebase, server architecture, and database for performance and scalability ✅ Research and select the best tools or models that integrate smoothly with your current systems There are many developers on Upwork who can build you an MVP fast (and often cheap). But if you want someone who can think deeply, architect scalable solutions, and build systems with initiative – that’s where I come in. 💡 Why work with me? I’ve earned Upwork’s Top-Rated Plus badge (top 3%) with over $200K in total earnings. I maintain a 100% Job Success Score, and my track record of 5-star client reviews reflects the quality and reliability I deliver.

Web Application
Terraform
AWS Fargate
RESTful API
Docker Compose
Docker
Flask
NGINX
Django
API Integration
React
PostgreSQL
Python
JavaScript
MySQL
$35 hourly
Wonseok J.
- 0.0/5
- (1 job)
6 years of full stack web developer. Rendering programmer for realtime renderer and free renderer for gameing or GC/VFX. React.js Next.js, Nest.js, C++, OpenGL

Web Application
Android
iOS
AOSP
ASP.NET
Node.js
React Bootstrap
React
C#
C++
TypeScript
$15 hourly
Kimkim K.
- 5.0/5
- (5 jobs)
- I'm translating English to Korean. (read/write) - I’m experienced in Python and HTML, jQuery, Javascript and ASP. - I have experience working as a barista in Ireland. - I was a presenter at the Data Conference with Airflow Data Pipelines.

Web Application
Amazon Web Services
Python Script
Python
Data Scraping
Google Cloud Platform
Translation & Localization Software
$20 hourly
Dirk V.
- 5.0/5
- (16 jobs)
Here to assist, help and serve! I do what I love and love what I do. How can I help you? I am a passionate fullstack web developer. I have experience with backend Django and frontend React development using Python and Javascript, and familiar with all the usual tools like Git and Docker. I also do a lot of work with practical AI integration and write and record courses about all the above. Always open to new oppurtunities and technologies. I am available and flexible to work in different time zones. Please feel free to contact me via dirk@dirkmeer.com Portfolio: dirkmeer.com

Web Application
Teaching Programming
Content Creation
Front-End Development
OpenAI API
Docker
RESTful API
SQL
JavaScript
CSS
Django
HTML
Git
Python
React
$20 hourly
Woongyeon J.
- 5.0/5
- (1 job)
If you want to redesign your website or make a beautiful and detailed web page, give me the job! I'm good at those things. hello! I am a front-end developer with 4 years of experience. I'm really good at building websites using React and Vue. I'm great at making web pages work on all devices (desktop, tablet, mobile) and in many browsers. I have a lot of experience making design files (Figma, Sketch, PSD, XD) into web pages(using Modern JS, Vue, React) that are identical pixel by pixel. I usually develop with React x Redux and Vue x Vuex, but I am good at quickly learning new technologies and applying them to products at the request of clients. I am good at using the following techniques. Skills 👉 React, Next.js, Vue 👉 HTML, CSS, JavaScript, Typescript 👉 styled-component, Emotion, Bootstrap 👉 Api integration(axios, fetch) 👉 REST APIs, GraphQL 👉 Git 👉 Cross-Browsing, Responsive Web(Desktop, Tablet, Mobile), Pixel-perfect development 👉 Using Good CSS Flex, Grid 👉 React to Vue or Vue to React Migration Tools 👉 Slack, GitHub, Jira, Trello, WebStorm, Adobe Photoshop, Adobe Illustrator, Microsoft Excel and more. I am looking forward to creating a great project with me and achieving great fruition. Thank you :)

Web Application
Git
Responsive Design
React
Vue.js
JavaScript
$20 hourly
MINGYEONG J.
- 5.0/5
- (4 jobs)
Hello. My name is MinGyeong J. I am a full-time freelancer now. I mainly use React and Next.js for web development. Tech Stack I've used ** Javascript / Typescript / React / Nextjs / Flutter / Redux / Recoil ** - Proficient in developing responsive and user-friendly web application - Strong attention to detail and effective problem-solving skills - Time management Let me know if you have any questions! I'm happy to help. I look forward to working with you! :)

Web Application
Flutter
TypeScript
Next.js
React
Responsive Design
JavaScript
$20 hourly
John K.
- 5.0/5
- (1 job)
I'm a multidisciplinary designer from Los Angeles, CA, currently living in South Korea. I can help with all of your design needs. What I can offer: ⦿ Marketing Materials (Digital and Print - Ad Banners, Social Media Posts, Brochures, E-mail, Business Cards, Letterheads, etc.) ⦿ Logo Design and Brand Identity ⦿ Presentation Design ⦿ Web Design ⦿ Package Design What you can expect: ✔ High-Quality Work ✔ Clear and Regular Communication ✔ Adjust to your working hours for quicker responses. ✔ Timely Delivery ✔ Meticulous Approach to All Tasks ✔ Customized Solutions ✔ Professionalism ✔ Experience and Expertise If you're looking for a graphic designer who fulfill everything design, you've come to the right place. Whether you need a logo, a professional presentation, or a brand makeover, I am here to help! Here’s how to start: Contact Me: Click the “Invite to Job” button or send me a message telling me about what you need. Let's Talk: Let’s discuss your goals, preferences, and any specifics needed for the project. Get a Proposal: I’ll provide a detailed plan and timeline to achieve your goals. Don’t wait! Reach out now! I’m also open to negotiating based on the project’s needs. Let’s discuss how we can work together within your budget!

Web Application
Web Design
Presentation Design
Business Presentation
Presentations
Adobe Creative Suite
Creative Direction
$500 hourly
Chavo K.
- 0.0/5
- (0 jobs)
Chavo(Chasing hard allows valuable opportunities.) I majored in computer science and anthropology at Seoul National University. I love using participatory observation in my life and learning insights from doing things first. At the suggestion of the gym owner, who asked me to work as a personal trainer, I achieved the National Coaching Certification of bodybuilding in Korea and worked as a personal trainer, released the music I made through a music distribution company and received royalties for the music, and started web development when CEO Lee Seung-yong told me that I needed web development, and now I am in charge of the overall web development of Codetree. Why not? It's the first thought before doing something. Even in product development, I try to make decisions based on quick execution, and I try to use the lessons learned to make the product a little more perfect. For me, I don't hesitate to learn new skills and try new ways of solving problems.

Web Application
Web Development
Front-End Development
$45 hourly
Jake L.
- 0.0/5
- (0 jobs)
Hi! I’m a full-stack no-code developer and UI/UX designer with 5+ years of experience building modern, powerful websites and web apps using Bubble.io, WordPress, and Figma. I specialize in creating fully functional, responsive, and scalable digital products — from simple landing pages to advanced platforms with AI integrations, automated workflows, and e-commerce systems. What I Can Help You With: - Custom Bubble.io web apps – including complex workflows, databases, and plugin setups - WordPress websites – built with Elementor, WooCommerce, and full SEO optimization - AI integration – OpenAI/GPT-based agents, chatbots, automation tools with Bubble - E-commerce platforms – online stores, payment gateways, and inventory systems - Figma UI/UX Design – wireframes, responsive layouts, design systems, and prototypes - API integrations – connect your app with Stripe, Google, Airtable, and more - Client portals and internal tools – tailor-made solutions for your business Tools & Skill Sets: - No-code development (Bubble.io, WordPress) - Web design (Figma, responsive design, user experience focus) - AI tools (OpenAI, API-driven agents and assistants) - UI/UX best practices - Workflow automation & API integration Why Work With Me: I work closely with my clients to fully understand their goals, offer practical advice, and make the process easy and smooth from start to finish. Whether you're launching a new product or improving an existing one, I’m here to help bring your vision to life with clean design, smart functionality, and a focus on results. Let’s team up and build something great together!

Web Application
App Development
App Design
API
Web Application Development
Bubble.io
Web Development
Web Design
$50 hourly
Jiwon P.
- 0.0/5
- (1 job)
Hello, I’m Jiwon Park, a problem solver driven by data and logic. I firmly believe in the power of human-centered design to transform technology and services. I enjoy the process of identifying user pain points through data and logic and finding logical solutions to address them. [Applying Technology to People] While pursuing a Master’s degree in Human-Computer Interaction, I had the opportunity to directly witness the potential of technology design rooted in a deep understanding of people. With a background in psychology, I developed a strong foundation in understanding human behavior and explored various ways to integrate this knowledge into technology. These experiences allowed me to recognize the limitations of both technology and humans, equipping me with the ability to drive product growth effectively through planning and design. [Defining Problems Convergently, Solving Them Divergently] As a Project Leader for multiple initiatives in my current role, I have conducted quantitative and qualitative research to define product challenges before launching projects. I’ve also explored diverse methodologies to find creative solutions. Beyond improving products solely from a UX research perspective, I have developed a broader skillset, considering the viewpoints of stakeholders, service providers, and users. This has enabled me to design and develop products that address a range of perspectives. Through these experiences, I’ve cultivated the ability to empathize with stakeholders and users through data and logically solve problems to drive product growth. I am committed to leveraging my skills and experiences to create impactful solutions that bridge the gap between technology and human needs.

Web Application
Wix
Web Design
App Design
Framer
Sketch
Figma
$75 hourly
Gunhee Y.
- 0.0/5
- (1 job)
I'm a full-stack developer experienced in building web applications, often powered by autonomous decision making features with the help of LLM agents.

Web Application
Product Development
International Development
Network Engineering
Server
LLM Prompt
Artificial Intelligence
Web Development
$88 hourly
Youkyung S.
- 0.0/5
- (0 jobs)
- Within 5years of a Product Designer experience - Speak English and Korean - Branding Design, Marketing Design, Solution UIUX Design, Web Design, Mobile Design - Figma, Adobe Illustration, Photoshops, After Effects - Knowledge of HTML5 and CCS3 and other front-ended programing languages. - Participate full project management from start to finish

Web Application
UX Research
UX Wireframe
UX & UI
Responsive Design
Android UI Design
iPhone UI Design
Web Design
Mobile UI Design
UX & UI Design
UI/UX Prototyping
App Design
Design Mockup
Design Concept
Smartphone
$15 hourly
Miles P.
- 5.0/5
- (3 jobs)
As a seasoned full-stack software engineer with 4 years of experience, I specialize in building robust, scalable web applications. My multicultural background has been instrumental in fostering successful collaborations with clients across the globe, enabling me to adapt seamlessly to diverse team dynamics and business cultures. I excel in modern web development using FastAPI for high-performance backends, Nuxt.js for dynamic frontend experiences, Tailwind CSS for polished interfaces, and MongoDB for flexible data solutions. While this is my preferred stack, I pride myself on being technology-agnostic and can adapt to your specific requirements. My commitment goes beyond just writing code – I deliver thoughtfully architected solutions that align with your business objectives and provide long-term value. Let's collaborate to bring your vision to life.

Web Application
Tailwind UI
International Development
International Business
MongoDB
Vue.js
FastAPI
Python
Tailwind CSS
Web Development
$34 hourly
JunHyeong S.
- 0.0/5
- (0 jobs)
As a Full Stack Developer, I specialize in building dynamic, scalable web applications with a strong focus on both frontend and backend technologies. I have extensive experience with modern frameworks such as React, Next.js, and Node.js, and I’m proficient in working with databases like MySQL, and MongoDB. My technical expertise includes writing clean, efficient code, optimizing performance, and integrating third-party APIs to enhance functionality. Throughout my career, I’ve successfully developed complex, data-driven applications and worked closely with cross-functional teams to deliver seamless user experiences. I am passionate about continuous learning and always explore the latest technologies, frameworks, and best practices to stay ahead in the fast-evolving tech landscape. Key Skills: * Frontend: React, Next.js, Vue.js, Nuxt.js, Tailwind CSS, HTML5, CSS3, JavaScript * Backend: Node.js, Express, Fastify, Drizzle, Elysia, RESTful APIs * App: ReactNative, Expo * Databases: MongoDB, MySQL * Version Control: Git, GitHub, GitLab * Deployment: Docker, AWS, Vercel My enthusiasm for solving complex problems and creating innovative solutions drives me to deliver high-quality projects that meet and exceed client expectations. Let’s build something amazing together!

Web Application
Android App Development
Desktop Application
Product Development
App Development
Web Development
JetBrains IntelliJ IDEA
MongoDB
Node.js
Nuxt.js
Vue.js
Expo.io
React
React Native
Next.js
$55 hourly
Dohyeon K.
- 0.0/5
- (0 jobs)
About Us We are a team of three skilled developers: one backend developer and two AI engineers with backend expertise. Together, we build robust web applications and deliver intelligent AI solutions tailored to business needs. Our combined experience allows us to handle complex projects efficiently, from backend infrastructure to cutting-edge AI integration. Education AI Engineer 1 - Kookmin University — Master’s Degree in Business IT Seoul, South Korea | 2022 – 2024 AI Engineer 2 - La Rochelle University - Master's degress, Mathematics and Applications - Mathematics and Interactions, MIX track Skills Web & Backend • Django, FastAPI, Flask, Docker, PostgreSQL, MySQL • RESTful APIs, WebSockets, Scalable Architecture AI & LLM • Python, PyTorch, Hugging Face, OpenAI API • LLM Orchestration: LangChain, Manus, LlamaIndex, CrewAI • RAG (Retrieval-Augmented Generation) pipelines • Vector DBs: FAISS, Weaviate, Chroma, Pinecone • Fine-tuning, Prompt Engineering, Deep Research Workflows • Agent Systems, Multi-Agent Frameworks, Generative Agents • Generative AI & Multimodal • Image Generation (Stable Diffusion, ControlNet) • Audio Generation (TTS, Voice Cloning, Music Gen) • Vision-Language Models (CLIP, BLIP, Flamingo) Services Offered • Comprehensive project management from initiation to completion • Regular communication to ensure smooth collaboration I prioritize consistent communication with clients to successfully complete projects. I look forward to collaborating to achieve the best results.

Web Application
Product Development
Django
Azure DevOps
AI Audio Generation
AI Video Generation
AWS Development
SQL
Agent GPT
Docker
International Development
Desktop Application
Artificial Intelligence
$75 hourly
Sumin H.
- 0.0/5
- (0 jobs)
👋 Hello, I’m Dr. Sumin Han, an AI researcher and system developer passionate about creating technologies that make cities smarter and more human-centered. 🔬 I hold a Ph.D. in Computer Science from KAIST, where I specialized in deep learning and spatiotemporal modeling, with a dissertation focused on enhancing traffic forecasting using urban human activity data. 💡 My expertise includes: Urban AI: Building predictive models for traffic, mobility, and real estate Machine Learning: Proficient in Python, TensorFlow, PyTorch, and data-driven modeling Software Development: Skilled in full-stack development (C/C++, Java, Node.js) and scalable systems (MPI, CUDA) Research Impact: 10+ peer-reviewed papers (CIKM, ASONAM, SocInfo), multiple patents, and award-winning projects 🏆 I’ve won top prizes in innovation competitions including Plug and Play Silicon Valley, and earned recognition for my teaching and research at KAIST. 🌍 I believe in bridging technology and society—translating cutting-edge AI into meaningful solutions for smart cities, mobility planning, and public well-being. 📬 Let’s connect! You can learn more at smhanlab.com or github.com/SuminHan.

Web Application
GIS
Data Science
Web Development
$70 hourly
Jaeik S.
- 0.0/5
- (0 jobs)
I’m a full-stack developer who builds clean, scalable, and reliable systems. From backend logic to frontend interfaces, mobile apps to databases, I deliver solutions that are both technically sound and user-focused. I believe great software should be more than just functional — it should be maintainable, resilient, and thoughtfully designed. I enjoy solving real-world problems through smart, sustainable code and always aim to deliver long-term value. Key strengths: - Full-stack development: backend (Java, Kotlin, Spring Boot), frontend (React, TypeScript), mobile (Android, iOS) - Real-time data processing and systems integration - Clean architecture and testable, maintainable code - Database design and optimization (MySQL, PostgreSQL, MongoDB) - Excellent communication and collaboration in remote teams

Web Application
Mobile App
Artificial Intelligence
Product Development
App Development
Web Development
iOS Development
Android App Development
$45 hourly
Hyunjin C.
- 0.0/5
- (0 jobs)
I’m a full-stack developer with strong experience in building high-performance web and mobile-integrated platforms, especially for global e-commerce and logistics services. I focus on delivering scalable, real-world solutions that are both user-friendly and technically robust. • Skilled in JavaScript (Next.js, React), TypeScript, Python (FastAPI), PHP (Laravel), and MongoDB/MySQL • Experience building end-to-end systems including multilingual shopping platforms, WebView-integrated apps, and real-time messaging with Redis/SSE • Comfortable managing full development cycles—from planning, API/backend design, to deployment with Docker and GitHub Actions on AWS • Communication and reliability are at the heart of my work—I’m here to collaborate and iterate with you

Web Application
Redis
Docker
AWS Fargate
MongoDB
Tailwind CSS
FastAPI
TypeScript
Next.js
$40 hourly
Andrew J.
- 0.0/5
- (0 jobs)
I am a backend developer with extensive experience leading and contributing to diverse projects from inception to deployment for companies ranging from startups to large enterprises. I have a proven track record of delivering scalable and robust backend solutions tailored to various business needs. Fluent in both English and Korean, I bring strong communication skills and cultural adaptability to every team I join. I am passionate about innovation and excited by opportunities to collaborate with talented professionals—especially in global, fast-paced environments where I can make a meaningful impact. ☑️ RESTful API development (Java + Spring) ☑️ Technical documentation (API specs, architecture diagrams, user guides) ☑️ Business analysis and requirements gathering ☑️ Unit, integration, and automated testing ☑️ Deployment support and CI/CD pipeline setup

Web Application
English
English to Korean Translation
Korean to English Translation
Korean
Back-End Development
Spring Framework
Spring Boot
REST API
Ecommerce Website
Web Development
International Development
$40 hourly
Junki K.
- 0.0/5
- (0 jobs)
I'm a full-stack software engineer with a background in Physics and a strong passion for building scalable web applications. I specialize in JavaScript, TypeScript, Next.js, React, and backend systems using Node.js and Prisma. I recently built and launched every10 — a SaaS product that delivers real-time news alerts via Telegram based on user-defined keywords. With experience in both frontend and backend development, I focus on delivering clean, maintainable, and high-performance code. I'm always eager to solve challenging problems and bring creative ideas to life.

Web Application
Product Development
International Development
Software Development
Desktop Application
Web Development
$71 hourly
Jaehyeok J.
- 0.0/5
- (0 jobs)
My approach is twofold: Foundation of Excellence: I build and manage every project based on the rigorous standards I mastered at Microsoft, ensuring clean, secure, and maintainable code. AI-Powered Efficiency: I leverage advanced AI coding assistants to accelerate development, perform proactive maintenance, and rapidly adapt to any technology stack your project demands. This unique combination means you get the reliability of a developer trained in a top-tier corporate environment, coupled with the speed and flexibility of a modern, AI-augmented professional. My Core Services: Enterprise-Grade Website Development: Building secure, scalable, and high-performance websites from the ground up. Proactive Website Maintenance & Hosting: Drawing on my Microsoft experience, I offer comprehensive maintenance plans to ensure your project runs flawlessly long after launch. AI-Powered Code Modernization: Refact

Web Application
Film Screenplay
Script
Scripting
Screenplay
Specifications
Construction Document Preparation
Product Development
$70 hourly
Dongho K.
- 0.0/5
- (0 jobs)
I’m a developer specializing in backend systems and mobile/web app development. I’ve built and maintained services such as payment processing, coupon management, and cross-platform apps using Flutter. I primarily use Kotlin and Spring Boot for backend development, and I’m also experienced in building web applications with React.js and Node.js. From designing scalable APIs to creating intuitive user interfaces, I manage full project lifecycles with a focus on performance and usability. I value clear, consistent communication—let’s work together to bring your ideas to life!

Web Application
Node.js
Android App
React
Spring Boot
Flutter
Web Development
$50 hourly
Sanghoon J.
- 0.0/5
- (0 jobs)
Full Stack developer / Ruby on Rails / Python / Django / GraphQL / React / JavaScript / HTML 5 / CSS / AWS

Web Application
Web Development
International Development
Django
Python
Ruby
Ruby on Rails
$35 hourly
Kim S.
- 0.0/5
- (0 jobs)
I am a Computer Science student with active experience on Kmong, Korea's leading freelance platform. I specialize in developing web applications and desktop software, bringing both technical expertise and international perspective through my study abroad experience. What I Offer: Web application development Desktop software creation Fluent English communication Cross-cultural project understanding My Commitment: I'm confident in my ability to explain complex technical architectures clearly, even to clients without development backgrounds. I believe in making technology accessible and ensuring every client fully understands their project. Ready to bring your ideas to life with clean, efficient code and clear communication. Let's connect and discuss your project needs!

Web Application
Web Development
Personal Computer
App Development
Desktop Application
Want to browse more freelancers?
Sign up