Hire the best JavaScript Developers in Seoul, KR
Check out JavaScript Developers in Seoul, KR with the skills you need for your next job.
- $40 hourly
- 5.0/5
- (6 jobs)
I am a software engineer with a solid academic background in Computer Science and over 8 years of hands-on experience in commercial development. I specialize in helping businesses and startups create new products from scratch and implement new features into existing software products. I have developed software solutions across various domains, including Medical Devices for human and veterinary applications, ERP systems integration, Automation/Testing software and EduTech. I am proficient in creating high-performance software for Windows and Linux, including: - High-performance GUI applications based on Qt Framework (QtWidgets) - Console applications (CLI - command-line interface) - Standalone applications (without GUI or CLI) - Windows services and system applications Tech stack I’ve worked with: - C++, Qt: Desktop apps, firmware development, shared libraries for use with Python/Node.js - TypeScript, Node.js: npm package development, backend/frontend dev, API integration, AWS deployment, desktop apps, Chrome extensions - Python (Django/Flask, PyQt/PySide/tkinter): Data analytics, ML models, data retrieval, Google Cloud pipeline deployment, API integration, desktop apps - Flutter: Integration of 3rd party libraries with mobile apps I have participated in ACM ICPC competitions and regularly use problem-solving websites such as Timus, Codeforces, HackerRank, and LeetCode. Through these experiences, I have developed a strong algorithmic, solution-oriented mindset, focusing on efficient problem-solving.JavaScriptNode.jsPyQtPythonQt FrameworkC++ - $40 hourly
- 5.0/5
- (14 jobs)
Experienced Senior Data Engineer | AWS, Big Data, and Cloud Solutions Specialist With over 8 years of experience as a Senior Data Engineer, I specialize in designing and implementing scalable data solutions across cloud platforms such as AWS and GCP. I have a proven track record in optimizing complex data pipelines, schema enforcement, and managing large-scale ETL processes. Skilled in Clickhouse, AWS Glue, Athena, Lambda, BigQuery, and Snowflake, I bring expertise in data architecture, cost reduction, and workflow automation. I'm passionate about delivering data-driven insights and leveraging cloud technologies to streamline processes for businesses. Let's collaborate to build efficient, scalable, and cost-effective data solutions!JavaScriptGISParquetClickHouseSnowflakeData Warehousing & ETL SoftwareAWS LambdaAWS GlueData ScienceAPI IntegrationMachine LearningSQLJavaPython - $60 hourly
- 4.7/5
- (3 jobs)
Hi 👋! I'm a multi-faceted startup enthusiast, designer, and developer that have been helping launch startups and developing applications for over 10 years. I have worked with clients from all of the world in many different areas. My expertise are: - Managing a large-scale team of PM, Developers, and Designers on web&mobile development projects. - Full-stack development with MEAN&MERN stack specialization. - Server&Cloud management for both development and production environment. - Designing full-scale end-to-end branding and identity for companies of all sizes in all areas. - Marketing & Content creation with availability of professional photography & videography services locally. I take pride in producing an extremely standardized, high quality work that reflects many years of experience in the tech field. I also have diverse experience helping startups as a coach and mentor. Please note that rates can differ depending of services required.JavaScriptWeb DesignRequirements SpecificationCSSPHPSQLTypeScriptAmazon Web ServicesHTMLWeb DevelopmentAngularJSNode.jsReactMongoDB - $50 hourly
- 5.0/5
- (2 jobs)
I am a highly skilled Senior AI/ML Engineer with expertise in MLOps, Computer Vision (CV), Simultaneous Localization and Mapping (SLAM), and Data Science. My passion for cutting-edge technologies is reflected in my successful track record of delivering top-notch solutions to meet diverse business needs. With extensive leadership experience in AI startups based in Seoul and Busan, I have led teams in creating, training, and implementing a wide range of ML/DL/CV models for integration into production across Web, Mobile, and edge devices. Areas of expertise: ✅ Machine Learning Operations (MLOps) to integrate and synchronize the life-cycle of both machine learning and software applications ✅ Computer Vision and Image Processing (Object detection/tracking/segmentation, Depth estimation, Image/Video classification, Image generation, OCR, Low-level vision) ✅ Simultaneous Localization and Mapping (SLAM) with Mono&Stereo Cameras and Lidar sensors ✅ Deploy Machine Learning solutions in the Cloud (AWS and GCP), on-premise, and edge devices ✅ Build ML models to solve NLP, audio, tabular, and time-series models Tech Stack: Languages: Python, C++, Scala, Java, JavaScript ML/DL Frameworks: PyTorch, Tensorflow&Keras, Scikit-Learn, Spark MLOps: MLFlow, Prefect, Evidently, WandB Containerization&Automation: Docker, Kubernetes, Amazon ECS&Fargate, GithubActions Data Analysis/Visualization Tools: Pandas, NumPy, Matplotlib, Seaborn Web Frameworks: Flask, FastAPI, Django Databases: PostgreSQL, MySQL, MongoDB Version Control: Github, Gitlab, BitBucket, DVC Please feel free to reach out and connect with me. I'd love to discuss how my combination of fast delivery, technical proficiency, and ability to adapt can help you accomplish your AI/ML project objectives.JavaScriptDjangoFastAPIFlaskSQLApache SparkMachine LearningData ScienceJavaPythonC++TensorFlowPyTorchComputer VisionDeep Learning - $50 hourly
- 5.0/5
- (1 job)
FAVE® [feɪv] is a company with intense curiosity for creating websites that come alive. #3d-website #immersive-website #webgl-ninja #javascript-ninja #threejs-ninja #aem #megnolia-cms #global-rollout FAVE® is a leading digital agency located in Seoul, South Korea. We can create and manage vibrant multilingual content using 3D WebGL and freely utilize Adobe Experience Manager (AEM). Comply with strict web accessibility. - Create 3D WebGL content with a twist. - Create interactive and dynamic AEM components. - Create and operate AEM Raw Code content with multilingual management. - Know-how in creating and distributing the most extensive global content in 80+ languages. - Official Partnership with Magnolia-CMS Since its founding in 2019, FAVE® has worked with world-class brands to help them achieve successful global rollouts of their websites. - 2024: [FAVE® x Magnolia] Official Partnership with Magnolia-CMS (Magnolia International Ltd., Switzerland Basel) - 2023: Created a 3D cosmic space using with 2D images. Created the mobile game ['ASTRA2' brand website]. - 2023: Innovation in the real estate market! Created the 3D Model Home Gallery for [Lotte Castle East-Pole]. - 2023: Created the [SpaceHub website] to brand Hanwha’s aerospace business. - 2023: Selected as an interactive mobile model house production agency for [Zigbang Co., Ltd.] Korea’s leading property technology company. - 2022~2023: Selected as the annual management agency for [Samsung Electronics' Semiconductor official website] (6 languages) #AEM - 2022: FAVE®’s official global website “Break The Frame” was selected as an Honorable Mention at [Awwwards.com] - 2021: Samsung "Why Galaxy", Build "Global Standard Guide". #AEM - 2021: FAVE® Corporate R&D Center establishment (Technical research for 3D WebGL, multi-localization and global roll-out) - 2020: Samsung Electronics, Build UI Live Prototype front-end UI production for future generation(P6). - 2019~2022: "Samsung Galaxy Z Flip4, Z Fold4, S22, S21, S20, Note20, Note10, Z Fold3, Z Fold2, Fold, Z Flip3, Z Flip" official Galaxy site & "Experience Online Showroom" released over 80 countries. #AEM - 2019~2022: [The Official Samsung Galaxy Site], Build and maintenance. Contact - fave.kr - biz.fave.kr/en - ninja@fave.krJavaScriptjQueryParallax Scrolling2D AnimationGSAP3D AnimationMagnolia International MagnoliaAdobe Experience ManagerWordPressChart.jsCSSHTMLWebGLFront-End DevelopmentThree.js - $40 hourly
- 5.0/5
- (19 jobs)
I am software engineer and scientist with experiences in pattern recognition in image, voice, financial data and texts. Programmings are in C++, php, javascript, html, css, swift, kotlin, dart. I worked in KAIST(Korea) as well as Imperial College(London), Fermilab(USA), Kyoto University(Yukawa Hall). I am bilingual in Korean and English. You can have immediate responses through zoom/google meetings.JavaScriptAlgorithm DevelopmentData ScrapingData MiningData ScienceMicrosoft ExcelWordPress PluginC++WordPressWooCommerceHTMLCSS - $150 hourly
- 5.0/5
- (18 jobs)
❓ Looking for an experienced software engineer to bring your ideas to life? ❓ Tired of cheap developers who over-promise and over-engineer, but under-deliver? ❓ Don't want to babysit a freelancer and want them to take responsibility as it's their own project? I have earned Upwork's Top-Rated Plus badge (top 3%) with over $100K in total earnings. I have maintained a 100% Job Success Score and my track record is proven by 5-star client reviews. Efficiency and quality are my priorities - typically delivering ahead of schedule and above & beyond client expectations. I'm fast and thorough and have worked on projects with a diverse range of scopes. My goal is to help you to achieve your business goals by leveraging my engineering skills. With exceptional communication skills, I ensure you stay well-informed about my development process and progress, regardless of your technical expertise. I'm an all-around talent working on both the frontend and backend of every job I'm involved in (saves you hiring a designer, and then a developer, and then a project manager, etc.). I specialize in Python Django and React for web development, API development, data migration, and deployment across all major providers. ____________________________________________________________________________ ⭐️ Skillset Back End: - Python, Django, Flask, FastAPI - SQL (MySQL, PostgreSQL, SQLite), NoSQL (MongoDB, AWS DynamoDB) - API design (Django Rest Framework, Flask API) - Deployment (AWS, GCP, Digital Ocean) DevOps: - Docker, Docker Compose - CI/CD (CircleCI, GitHub Actions) - AWS - Terraform Front End: - HTML5, CSS3, Javascript - Frameworks (Vue, React) ____________________________________________________________________________ 📩 Send me a message to discuss how we can drive your project to success. 📩JavaScriptTerraformAWS FargateRESTful APIDocker ComposeDockerFlaskNGINXDjangoAPI IntegrationWeb ApplicationReactPostgreSQLPythonMySQL - $50 hourly
- 1.0/5
- (1 job)
Principal Software Engineer with over 25 years of diverse experience in many international locations (UK, South Korea, Germany, The Netherlands, Thailand). Skilled in Kotlin, Java, Scala, C#, C++, Python, Typescript, C, D, Jenkins, Docker, Git, AWS, Kubernetes, Agile Methodologies, Databases, SQL, NoSQL, Systems Engineering, Software Design and Architecture and Blockchain.JavaScriptJenkinsNoSQL DatabaseRESTful APIWeb3AnsibleBlockchainCI/CDGraphQLFunctional ProgrammingSQLPythonTypeScriptKotlin - $15 hourly
- 5.0/5
- (9 jobs)
1. I can create single-page applications and websites using React.js and Next.js and vanilla JS, HTML5, and CSS3 from scratch without templates. 2. I can create customized components such as Buttons, Inputs, Forms, Cards, Text Sections and all others. 3. I can design websites with CSS libraries such as TailwindCSS, Ant DesignMaterial-UI, Tachyons, etc. 4. I can connect the website to REST API. 5. I can create UI/UX for a website or mobile application on Figma. 6. I can do code reviews for JS, HTML, and CSS. 7. I can deploy the website as well as connect SSL.JavaScriptFigmaNext.jsTypeScriptTildaTailwind CSSWordPressShopifyFlexboxCSS 3HTML5Node.jsReactPythonBootstrap - $20 hourly
- 5.0/5
- (3 jobs)
I have been doing translation jobs for years on demand. I have translated various items, such as plumbing related machines, legal papers, and so on. I own a Chinese language BA and an LL.M which taught in English in one of the world top 100 universities. I understand several programming languages as well, so, any types of request will be successfully done while not ruining the language forms.JavaScriptChinese to English TranslationEnglish to Korean TranslationSDL TradosEnglishChineseKoreanPythonCSSHTML - $10 hourly
- 5.0/5
- (1 job)
I’m a developer with experience in building websites for small and medium sized businesses. Whether you’re trying to win work, list your services or even create a whole online store – I can help!JavaScriptTailwind UIReact NativeTailwind CSSWordPressMySQLPHPNext.jsMongoDBNode.jsReactTypeScript - $20 hourly
- 5.0/5
- (15 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.comJavaScriptTeaching ProgrammingContent CreationFront-End DevelopmentOpenAI APIDockerRESTful APISQLWeb ApplicationCSSDjangoHTMLGitPythonReact - $20 hourly
- 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 :)JavaScriptGitResponsive DesignReactVue.jsWeb Application - $35 hourly
- 0.0/5
- (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-freeJavaScriptReact NativeSvelteSQLResponsive DesignNode.jsWeb ApplicationCSS 3CSSHTMLReactPythonWeb Development - $20 hourly
- 5.0/5
- (2 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! :)JavaScriptFlutterTypeScriptNext.jsWeb ApplicationReactResponsive Design - $50 hourly
- 0.0/5
- (0 jobs)
SUMMARY As a developer with 5 years of experience in software development and engineering, I am proficient in overseeing the design and development of web and mobile applications, APIs, and backend systems, leveraging the latest technologies and best practices. I am passionate about continuously staying updated with industry trends, emerging technologies, and the competitive landscapeJavaScriptDatabase DesignDatabaseDjangoKubernetesPythonReactContinuous IntegrationContinuous ImprovementCI/CDVue.jsNode.jsNestJS - $10 hourly
- 4.9/5
- (3 jobs)
Hello ! My name is Oygul ! I am front-end developer 3+ years. ✅ 🔷 Proficient in HTML5, CSS3, JavaScript, and responsive web design principles. 🔷 Experienced ReactJS, TypeScript developer 🔷 Strong understanding of cross-browser compatibility and web performance optimization. 🔷 Worked with tools like Git for version control and collaboration on projects.JavaScriptVoice TalentNext.jsTypeScriptWordPressPSD to HTMLResponsys DevelopmentLanding PageCSS 3PrototypingBootstrapReactSassHTML5Web Development - $60 hourly
- 0.0/5
- (0 jobs)
I am a developer specializing in full stack software development and cloud technologies. Proficient in programming languages such as JavaScript, Python, Java. Experienced in modern frameworks such as ReactJS, NodeJS, and Spring. Solid foundation in relational and non-relational databases including MySQL, PostgreSQL, and MongoDB. Hard-working, detail-oriented, and intrinsically motivated towards excellence with a strong passion for innovation and problem-solving. Former US Army Officer, extensively experienced in project management.JavaScriptC#REST APIWeb APIReactFlaskOWASPGitLabDockerOpenShiftPHPPythonJava - $40 hourly
- 4.8/5
- (4 jobs)
With over 15 years of experience, I’ve worked primarily as a full-stack developer. At the moment, my focus is on JavaScript, TypeScript, React, and NodeJS. 🎯 Impact I made: - Helped ~10,000 daily users discover fashion items with better filtering - Developed demo prototype (front-end) for a start up that helped secure $1.5 million in seed investment 👷 What I'm skilled at: - Frontend: React.js, Next.js, HTML, CSS, JavaScript, TypeScript, TailwindCSS, Webpack - Backend: Node.js, Express.js, Fastify, PHP, Laravel - Databases: PostgreSQL, MySQL, Supabase, Firebase, MongoDB I specialize in building a range of web applications, from small-scale projects to complex systems like SaaS platforms, analytics dashboards, and embedded third-party JavaScript applications. If my skills align with your needs and can contribute to your business goals, feel free to reach out.JavaScriptNestJSFront-End DevelopmentPHPGraphQLFastifyExpressJSTypeScriptNode.jsReact - $20 hourly
- 5.0/5
- (1 job)
• Proficient in multiple programming languages, able to pick up new ones quickly • Able to take vague instructions and deliver results • Strong attention to detail • Strong verbal and written communication skills • Highly motivated and works well independentlyJavaScriptSQLBootstrapReactCSSHTMLjQuery - $20 hourly
- 4.9/5
- (9 jobs)
Independent Marketing, Planning and Sales Consultant, Blockchain and ICO Expert, Technical Product and Project Manager, specializing on South Korean Market. Has UX/UI killer instincts, Sales, SEO optimization and Consulting expertise. Has various working experience in different types of industries such as International Trade, Banking, Tech and Consulting. Currently working as Technology Consultant at Robert Walters, South Korea. Previously worked for TOP consulting firm PwC, TOP South Korean Bank, Shinhan Bank, most innovative trading company TRIDGE and Design Research Labs. Market Knowledge: CIS countries & Asia & United States & South Korea. Managed and supervised multiple projects simultaneously. Highly-developed multitasking skills, remote management and design thinking. Punctual and loyal - he got all you need :)JavaScriptVisual Basic for ApplicationsProject ManagementMarket ResearchRussianFront-End DevelopmentSalesUser Experience DesignKoreanData Entry - $100 hourly
- 5.0/5
- (1 job)
Hello, my name is Hyungtae Kim. I am a developer with experience primarily in South Korea and the United States, across both academia and industry. My timezone is basically KST, and I travel sometimes. Since 2008, I have been: * Specializing in Python and JavaScript * Advocating for serverless and web technologies * Contributing to open-source projects * Reading YC Hacker News I can work on the following, but I'm not limited to these: * Front-end development (web and mobile) * Back-end development (server and serverless) * Data processing, analysis, and visualization * Cloud computing and infrastructure maintenance * Custom research solutions * AI and autonomous agents Here are the things I don't do: * Blockchain * 3D Graphics * Enterprise solutions * DevOps and testing * Embedded programming My clients would look for professionals who: * Break down problems into manageable parts * Employ forward-looking technologies * Ensure compliance with licensing restrictions * Use best practices in given situations * Utilize computing resources efficiently * Write code that is easy to hand over Over the past decade, I have received three recognitions in South Korea. * 2014, Minister’s award - Ministry of Security and Public Administration * 2014, Minister’s award - Ministry of Science, ICT and Future Planning * 2016, Minister’s award - Ministry of Science, ICT and Future Planning As a closing note, I don't use AI to write code. I use Vim. I also translate papers, presentations, and technical documents that require the finest level of Korean literacy. If you feel about relevant so far, please have a look at my section of employment history with a cup of coffee ☕️ Thank you!JavaScriptGeographic InfographicServerless ComputingData AnalysisProgressive Web AppSQLAlchemyFastAPIAI Agent DevelopmentAutomationWeb APIRedisVue.jsFirebaseGoogle Cloud PlatformPython - $25 hourly
- 5.0/5
- (9 jobs)
✅ Software Developer for 5+ YEARS on large scale projects in different countries like the UNITED STATES, UNITED KINGDOM, and SOUTH KOREA ✅ Main experience in JAVASCRIPT frameworks such as REACT and ANGULAR for frontend ✅ NODEJS frameworks for business logic in the backend ✅ Machine Learning Engineer specializing in AI projects within research labs in South Korea, experienced in TENSORFLOW and PYTORCH for Web and Mobile Applications ✅ Database Technologies such as MYSQL, MongoDB, and FIREBASE ✅ Using ANDROID or FLUTTER for mobile application development over various apps that are in production now Feel free to contact me anytime, I'll get back to you at my earliest convenience!JavaScriptAndroidTypeScriptAngularReact NativeReactNode.jsMongoDBDartAmazon Web ServicesWeb DesignWeb ApplicationWeb DevelopmentFlutterFront-End Development - $30 hourly
- 0.0/5
- (0 jobs)
I have a Master Degree in Computer Science, a strong technical expertise as well as a keen eye for design. I have been working in development field for the last 14 years, and I worked on hundreds of small/medium size projects, and a dozen of big projects. If you are interested in working with me, feel free to send me an invite or a job offer.JavaScriptAngularPythonHTMLReactPHP - $25 hourly
- 0.0/5
- (0 jobs)
I can provide general web development and support at from and back end level. have experience supporting different organization from small to large enterprises.JavaScriptWeb DevelopmentGraphic DesignReactPHP Script - $45 hourly
- 0.0/5
- (0 jobs)
I have been developing software for over 4 years. I specialize in Larevel React React Native Vue Node/Javascript HTML, CSS PHP NoSQL, MySQL, and PostgreSQL I can provide good references and I guarantee that you will be satisfied with my results. I will make sure that I earn your 5 star rating!JavaScriptIonic FrameworkCSS 3FlutterTypeScriptReact NativeAngularVue.jsReactReduxCodeIgniterPythonPHPNode.js - $10 hourly
- 0.0/5
- (0 jobs)
I like building websites using HTML, CSS, and JavaScript and setting up everything to work with search engines and social media apps (Open Graph). Using a framework like Bootstraps helps insure compatibility across browsers and makes the site easier to maintain. It’s also nice to have support for dark mode. One important thing, I believe, for websites is to validate the code to W3 HTML standards, evaluate the each page’s performance using Chrome Lighthouse, and ensure accessibility use the WAVE accessibility tool. I have built websites using: – Custom coded HTML & CSS – Bootstrap – JavaScript (both plain JavaScript and jQuery) – Node.js / Webpack for building sites (i.e. dependencies & processing SCSS) – Fat-free Framework, a PHP micro-framework for building websitesJavaScriptBootstrapFat-Free FrameworkHTMLSCSSWebsiteCSSPHP Want to browse more freelancers?
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