Web Development Company in Seoul

Scope sets the figure, and scope here spans: a scoped Korean-language marketing site at Seoul rates, a custom Next.js or Nuxt commerce platform with NAVER Pay, KakaoPay, and Toss Payments integration, or full enterprise web platforms with multi-region deployment, real-name verification, KCSC content workflows, and chaebol-grade SLAs. Scope drivers include Naver and Google SEO setup, KWCAG AA accessibility, PIPA privacy notices, and PASS-ready identity hooks where needed. Seoul rates sit above Busan and Daegu because of the Naver, Kakao, and Coupang talent premium. We give fixed-fee proposals tied to milestones rather than open T and M.

Korea is one of the few markets where Google does not dominate search. Naver holds roughly 50 to 60 percent of search volume, Google sits around 30 percent, Daum (Kakao) takes a further 5 to 10 percent, and Bing is rounding error. A Korean site that ignores Naver loses the majority of organic discovery. Our SEO setup registers the property in Naver Webmaster Tools and Naver Search Advisor, submits a Naver-specific sitemap, configures Naver Place for any business with a physical location, and structures content for Naver's blog-and-cafe-heavy ranking signals (Naver still privileges its own UGC properties heavily). Google Search Console runs in parallel so we cover the global expat and English-language traffic. Site speed and Core Web Vitals matter for both engines.

K-ISMS+P (Korea Information Security Management System with Personal Information protection extension) is Korea's mandatory cybersecurity certification administered by KISA. It is required for ISPs, IDC operators, hospitals over 100 beds, and any online service handling more than one million users per day, or with annual revenue thresholds defined by the Act on Promotion of Information and Communications Network Utilization. Korean enterprise procurement (Samsung, LG, Hyundai, the Big Four banks) frequently requires vendors to either hold K-ISMS+P themselves or operate inside K-ISMS+P certified infrastructure such as NAVER Cloud Platform or KT Cloud. We build to the control framework from day one, map evidence as we ship, and coordinate with your certification body so the audit is paperwork rather than rework.

Korea's Personal Information Protection Act is stricter than GDPR in several specific places. The breach notification window is 24 hours to the data subject and PIPC for serious incidents, not 72. Resident Registration Numbers (jumin deungrok beonho) are categorised as sensitive and effectively cannot be collected on a public-facing website without statutory basis, which is why PASS, i-PIN, and mobile carrier verification dominate Korean signup flows. Consent must be granular and separated by purpose, with explicit opt-in for marketing, third-party sharing, and overseas transfer. Children under 14 require legal guardian consent verified through a real-name channel. Our PIPA pipeline covers consent UI, data inventory, retention scheduling, overseas-transfer disclosure, and the data subject rights dashboard the PIPC expects on any consumer service.

Yes. The Korean Web Content Accessibility Guidelines (KWCAG 2.2) are mandatory for all public-sector websites under the Act on Welfare of Persons with Disabilities and the Act on Digital Inclusion. The standard mirrors WCAG 2.1 AA with Korean-specific additions: Hangul-Hanja ruby for terminology, screen-reader pronunciation for Sino-Korean numerals, and explicit handling of vertical Korean layouts. We test with NVDA + Korean voice, Sense Reader (the dominant Korean screen reader), and the Korean Web Accessibility Evaluation Tool (K-WAH 4.3) maintained by NIA. Public-tender deliverables include the WA certification mark application package, an evaluation report, and screen-reader walkthrough videos. Private-sector clients increasingly also adopt KWCAG because the Korea Human Rights Commission has actively enforced web accessibility against commercial sites since 2020.

Yes. Standard payment integrations include NAVER Pay, KakaoPay, Toss Payments, Inicis (KG Inicis), NHN KCP, Nice Pay, Samsung Pay web SDK, and PayCo. For B2B and large-ticket commerce we add Korean credit card 3DS via the local PG, virtual account (gasangkjwa) settlement, and Hometax integration for electronic tax invoices. Identity layers cover KISA PASS real-name verification through the three Korean mobile carriers (SKT, KT, LG U+), i-PIN for legacy government interop, Naver Login, Kakao Sync, and corporate certificate (gongdong inseo) sign-in for B2B portals. Each integration ships with a PIPA data-flow note, a fallback path for users without a Korean mobile number (mostly inbound expat and foreign-card scenarios), and an audit log that satisfies FSC and KISA reviewers.

A typical mid-market Korean storefront takes fourteen to twenty weeks from kickoff to go-live, assuming product data exists and design direction is locked. Week 1 to 3 covers PIPA scoping, payment-PG selection, Naver Place onboarding, and KWCAG target setting. Week 4 to 10 is build, with Korean payment and PASS integration typically on the critical path because of PG certification lead times. Week 11 to 14 is QA on Korean LTE conditions, Naver Webmaster Tools submission, Naver Shopping feed registration, and KCSC content review where adult or restricted categories apply. Week 15 to 18 covers shadow launch, real-user monitoring on Korean carriers, and Korean Customs Service overseas-purchase declarations if cross-border applies. Add four to six weeks if K-ISMS+P certification is in scope or if Hangul-Hanja localisation requires a copy pass from a Korean editor.

Generally no, but the long tail matters depending on audience. The Korean government completed its ActiveX deprecation program in 2020, public certificates moved off ActiveX by 2021, and banks fully migrated by 2023. Modern Korean consumer sites can safely target Chrome, Edge, Safari, Samsung Internet (huge mobile share in Korea), and Whale (Naver's browser) without any ActiveX or NPAPI fallback. However, B2B portals serving chaebol procurement teams, older government suppliers, or hospital administrators sometimes still hit IE-mode in Edge or legacy Whale builds. We baseline support on Samsung Internet and Whale as first-class targets, run automated visual regression on those engines, and only add IE-mode shims when a documented enterprise audience requires it. We do not write new ActiveX components under any circumstance.