topdev.vn

We performed a comprehensive analysis of topdev.vn on 2026-06-30. The website returned an HTTP 200 status code with a server response time of 12842ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 2322 KB, and the site is served behind a CDN (Content Delivery Network). The website uses a secure HTTPS connection with a valid SSL certificate issued by Google Trust Services (DV type). The connection is encrypted using TLS 1.3 with the TLS_AES_256_GCM_SHA384 cipher suite and ECDSA-SHA256 signature algorithm. The certificate covers 2 domain(s) (Subject Alternative Names) and expires on 2026-09-05, which is 67 days from now. The security headers analysis reveals a score of 15/100 (poor). The following security headers are properly configured: X-Frame-Options. However, the site is missing Content-Security-Policy, Strict-Transport-Security (HSTS), X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 16 technologies across 12 categories powering topdev.vn. The detected stack includes WordPress, Magento, Next.js media, Angular, React, Vue.js, Webpack, Google Analytics 4, Microsoft Clarity, Google Tag Manager, Meta Pixel, LinkedIn Insight Tag, Cloudflare, Vercel, jQuery, and WP Rocket. The primary e-commerce platform is Magento. The site uses Next.js as its primary framework (version media). The UI is built with React. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, topdev.vn receives an overall trust score of 68/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, topdev.vn receives a trust score of 68/100, which places it in the "Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, a valid SSL certificate issued by Google Trust Services with 67 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, DMARC email authentication with a none policy, and DNSSEC providing authenticated DNS responses. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, missing Referrer-Policy, potentially leaking URL information to third parties, and the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked topdev.vn against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned topdev.vn and identified 16 distinct technologies across 12 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. CMS: WordPress — manages the content and page structure for topdev.vn. Ecommerce: Magento — powers the online store and shopping functionality for topdev.vn. Framework: Next.js (version media) and Angular — provides the application framework and routing for topdev.vn. UI Library: React and Vue.js — handles the user interface rendering and component management for topdev.vn. Build Tool: Webpack — bundles and optimizes the JavaScript and CSS assets for topdev.vn. Analytics: Google Analytics 4 and Microsoft Clarity — tracks visitor behavior and provides traffic insights for topdev.vn. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for topdev.vn. Advertising: Meta Pixel and LinkedIn Insight Tag — handles advertising pixel tracking and conversion measurement for topdev.vn. CDN: Cloudflare — accelerates content delivery by caching assets at edge locations worldwide for topdev.vn. Hosting: Vercel — provides the server infrastructure for topdev.vn. JavaScript Library: jQuery — provides utility functions and DOM manipulation for topdev.vn. Performance: WP Rocket — optimizes page loading speed and performance for topdev.vn. We also extracted the following tracking identifiers: Google Tag Manager container GTM-WMR5MTDC and Meta (Facebook) Pixel ID 2360032934488742. These IDs can be used to identify other websites operated by the same organization.

topdev.vn delivers its homepage in 12842ms (server response time), which is considered slow by industry standards. The total page weight is 2322 KB, and we detected 210 resource requests loading assets from 10 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 0 out of 3 CSS files and 1 out of 47 JavaScript files are minified. Minifying the remaining 49 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. The site is served through a Content Delivery Network (CDN), which caches static assets at edge servers around the world. This means visitors from different geographic regions receive content from the nearest edge server, significantly reducing latency. CDN usage is particularly important for websites with a global audience, as it can reduce page load times by 40-60% for distant visitors. From an environmental perspective, each page view of topdev.vn produces approximately 1.13g of CO₂, earning a carbon rating of F. The website's carbon footprint could be reduced by optimizing images, enabling compression, reducing third-party scripts, and leveraging caching. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 2322 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for topdev.vn. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

topdev.vn resolves to the IPv4 address 104.21.83.64 and also supports IPv6 (2606:4700:3031::ac43:d754), demonstrating modern network infrastructure readiness. The domain has 2 A record(s) configured. The domain name system is managed by 2 name servers: chan.ns.cloudflare.com and rudy.ns.cloudflare.com. Having 2 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for topdev.vn is handled by Google Workspace with 5 MX records configured: aspmx.l.google.com, alt1.aspmx.l.google.com, and alt2.aspmx.l.google.com and 2 more. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a none policy — a monitoring-only setting that doesn't enforce any action on unauthorized emails. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is enabled for topdev.vn, providing an additional layer of security by cryptographically signing DNS records. This prevents DNS cache poisoning and man-in-the-middle attacks that could redirect visitors to malicious websites.

The homepage of topdev.vn contains 817 words of visible text content. This is a moderate amount of content. The page is structured with 0 H2 headings, 0 H3 headings, 0 H4 headings. The page includes 62 images. 2 images (3%) are missing alt text attributes, which is a significant concern for both accessibility and SEO. Screen readers rely on alt text to describe images to visually impaired users, and search engines use alt text to understand image content. Only 97% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 67 internal links pointing to other pages on the same domain and 6 external links pointing to third-party websites. There are 47 external JavaScript files, 3 CSS stylesheets, and 0 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages), robots.txt (controls search engine crawling behavior), and Progressive Web App (PWA) manifest (enabling app-like installation). Notable missing features: Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility. We detected the following payment methods accepted on topdev.vn: Visa, Mastercard, Discover, and JCB. Offering multiple payment options including credit cards and digital wallets improves customer trust and can increase conversion rates. The website has social media presence across 3 platforms: Facebook (@tr), Linkedin (@topdev-vn), and Youtube (@CreatoryVWS). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for topdev.vn is well-optimized at 36 characters: "TopDev - Việc Làm Lương Cao Hàng Đầu". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 145 characters (well-optimized): "Việc làm lương cao mới nhất tại TopDev. Hàng ngàn việc làm, nhà tuyển dụng hàng đầu, mức lương hấp dẫn và đãi ngộ tốt ch...". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The canonical url is correctly set to https://topdev.vn/, preventing duplicate content issues, the page language is declared as vi, the meta robots directive is set to index, follow, and a favicon is configured. Open Graph meta tags are configured with 4/4 recommended fields: OG title ("TopDev - Việc Làm Lương Cao Hàng Đầu..."), OG description, OG image (social sharing thumbnail), OG type (website). These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol. A Twitter Card of type summary_large_image is configured, which controls how links appear when shared on Twitter/X. The "summary_large_image" type displays a large image preview, which typically generates higher engagement rates than the basic card type. The meta keywords tag contains 10 terms including itjob, it jobs, topdev, it job, and cv it. Note: Google has officially confirmed that it does not use the meta keywords tag as a ranking signal. However, some other search engines (Bing, Yandex) may still reference it.