diff --git a/portfolio-view/src/App.tsx b/portfolio-view/src/App.tsx
index 378bb9a..5ffabde 100644
--- a/portfolio-view/src/App.tsx
+++ b/portfolio-view/src/App.tsx
@@ -1,6 +1,8 @@
 import { Header } from './components/layout/Header'
 import { Footer } from './components/layout/Footer'
 import { HeroSection } from './components/hero/HeroSection'
+import { TechStackSection } from './components/tech/TechStackSection'
+import { ArchitectureSection } from './components/architecture/ArchitectureSection'
 import { ProjectsSection } from './components/projects/ProjectsSection'
 import { ChatWidget } from './components/chat/ChatWidget'
 
@@ -10,6 +12,8 @@ function App() {
       <Header />
       <main>
         <HeroSection />
+        <TechStackSection />
+        <ArchitectureSection />
         <ProjectsSection />
       </main>
       <Footer />
diff --git a/portfolio-view/src/components/architecture/ArchitectureSection.tsx b/portfolio-view/src/components/architecture/ArchitectureSection.tsx
new file mode 100644
index 0000000..68ef4cc
--- /dev/null
+++ b/portfolio-view/src/components/architecture/ArchitectureSection.tsx
@@ -0,0 +1,169 @@
+const ACCENT = '#22d3ee'
+const BOX_BG = '#27272a'   // zinc-800
+const BOX_BORDER = '#3f3f46' // zinc-700
+const TEXT = '#fafafa'
+const TEXT_MUTED = '#a1a1aa'
+
+type BoxProps = { x: number; y: number; w: number; h: number; label: string; sub?: string }
+
+function ServiceBox({ x, y, w, h, label, sub }: BoxProps) {
+  return (
+    <g>
+      <rect x={x} y={y} width={w} height={h} rx={8} fill={BOX_BG} stroke={BOX_BORDER} strokeWidth={1.5} />
+      <text x={x + w / 2} y={sub ? y + h / 2 - 6 : y + h / 2 + 5} textAnchor="middle" fill={TEXT} fontSize={13} fontFamily="JetBrains Mono, monospace" fontWeight={600}>
+        {label}
+      </text>
+      {sub && (
+        <text x={x + w / 2} y={y + h / 2 + 12} textAnchor="middle" fill={TEXT_MUTED} fontSize={10} fontFamily="JetBrains Mono, monospace">
+          {sub}
+        </text>
+      )}
+    </g>
+  )
+}
+
+function InfraBox({ x, y, w, h, label, sub }: BoxProps) {
+  return (
+    <g>
+      <rect x={x} y={y} width={w} height={h} rx={8} fill={BOX_BG} stroke={ACCENT} strokeWidth={1} strokeDasharray="4 3" opacity={0.85} />
+      <text x={x + w / 2} y={sub ? y + h / 2 - 6 : y + h / 2 + 5} textAnchor="middle" fill={TEXT} fontSize={12} fontFamily="JetBrains Mono, monospace" fontWeight={600}>
+        {label}
+      </text>
+      {sub && (
+        <text x={x + w / 2} y={y + h / 2 + 12} textAnchor="middle" fill={TEXT_MUTED} fontSize={10} fontFamily="JetBrains Mono, monospace">
+          {sub}
+        </text>
+      )}
+    </g>
+  )
+}
+
+export function ArchitectureSection() {
+  // Layout constants
+  const W = 760
+  const H = 440
+
+  // Gateway
+  const gw = { x: 280, y: 30, w: 200, h: 52 }
+  const gwCx = gw.x + gw.w / 2
+  const gwCy = gw.y + gw.h
+
+  // Services row — evenly spaced
+  const svcY = 145
+  const svcH = 52
+  const svcW = 140
+  const services = [
+    { label: 'auth-service',      sub: 'JWT / OAuth2', x: 20  },
+    { label: 'post-service',      sub: 'CRUD / feed',  x: 185 },
+    { label: 'rag-service',       sub: 'AI / RAG',     x: 350 },
+    { label: 'analytics-service', sub: 'metrics',      x: 515 },
+  ]
+
+  // Infra row
+  const infraY = 310
+  const infraH = 52
+  const infraW = 160
+  const infra = [
+    { label: 'PostgreSQL', sub: 'persistence', x: 60  },
+    { label: 'Kafka',      sub: 'event bus',   x: 295 },
+    { label: 'Consul',     sub: 'service mesh',x: 530 },
+  ]
+
+  return (
+    <section id="architecture" className="py-24 px-6">
+      <div className="max-w-5xl mx-auto">
+        {/* Header */}
+        <div className="mb-14">
+          <p className="font-mono text-xs text-accent tracking-widest mb-3 uppercase">
+            System Design
+          </p>
+          <h2 className="font-heading font-bold text-4xl md:text-5xl text-white tracking-tight">
+            Platform Architecture
+          </h2>
+        </div>
+
+        {/* Diagram */}
+        <div className="rounded-xl border border-zinc-800 bg-zinc-900/60 p-4 overflow-x-auto">
+          <svg
+            viewBox={`0 0 ${W} ${H}`}
+            width="100%"
+            style={{ maxWidth: W, display: 'block', margin: '0 auto' }}
+            aria-label="Microservices architecture diagram"
+          >
+            <defs>
+              <marker id="arrow" markerWidth="8" markerHeight="8" refX="6" refY="3" orient="auto">
+                <path d="M0,0 L0,6 L8,3 z" fill={ACCENT} />
+              </marker>
+            </defs>
+
+            {/* ── Gateway → Services connections ── */}
+            {services.map((s) => {
+              const sx = s.x + svcW / 2
+              const sy = svcY
+              return (
+                <line
+                  key={s.label}
+                  x1={gwCx} y1={gwCy}
+                  x2={sx}  y2={sy - 2}
+                  stroke={ACCENT}
+                  strokeWidth={1.5}
+                  strokeOpacity={0.7}
+                  markerEnd="url(#arrow)"
+                />
+              )
+            })}
+
+            {/* ── Services → Infra connections ── */}
+            {services.map((s) => {
+              const sx = s.x + svcW / 2
+              const sy = svcY + svcH
+              // Each service connects to the nearest infra node
+              const targets = infra.map((inf) => inf.x + infraW / 2)
+              const nearest = targets.reduce((prev, cur) =>
+                Math.abs(cur - sx) < Math.abs(prev - sx) ? cur : prev
+              )
+              return (
+                <line
+                  key={s.label + '-infra'}
+                  x1={sx}      y1={sy}
+                  x2={nearest} y2={infraY - 2}
+                  stroke={ACCENT}
+                  strokeWidth={1}
+                  strokeOpacity={0.35}
+                  strokeDasharray="5 4"
+                  markerEnd="url(#arrow)"
+                />
+              )
+            })}
+
+            {/* ── Gateway box ── */}
+            <ServiceBox {...gw} label="Spring Cloud Gateway" />
+
+            {/* ── Service boxes ── */}
+            {services.map((s) => (
+              <ServiceBox key={s.label} x={s.x} y={svcY} w={svcW} h={svcH} label={s.label} sub={s.sub} />
+            ))}
+
+            {/* ── Section label: Shared Infrastructure ── */}
+            <text x={W / 2} y={infraY - 18} textAnchor="middle" fill={TEXT_MUTED} fontSize={10} fontFamily="JetBrains Mono, monospace" letterSpacing={2}>
+              SHARED INFRASTRUCTURE
+            </text>
+
+            {/* ── Infra boxes ── */}
+            {infra.map((inf) => (
+              <InfraBox key={inf.label} x={inf.x} y={infraY} w={infraW} h={infraH} label={inf.label} sub={inf.sub} />
+            ))}
+
+            {/* ── Legend ── */}
+            <g transform={`translate(${W - 175}, ${H - 52})`}>
+              <line x1={0} y1={8} x2={28} y2={8} stroke={ACCENT} strokeWidth={1.5} markerEnd="url(#arrow)" />
+              <text x={34} y={12} fill={TEXT_MUTED} fontSize={10} fontFamily="JetBrains Mono, monospace">request routing</text>
+              <line x1={0} y1={26} x2={28} y2={26} stroke={ACCENT} strokeWidth={1} strokeDasharray="5 4" markerEnd="url(#arrow)" />
+              <text x={34} y={30} fill={TEXT_MUTED} fontSize={10} fontFamily="JetBrains Mono, monospace">infra dependency</text>
+            </g>
+          </svg>
+        </div>
+      </div>
+    </section>
+  )
+}
diff --git a/portfolio-view/src/components/tech/TechStackSection.tsx b/portfolio-view/src/components/tech/TechStackSection.tsx
new file mode 100644
index 0000000..f9671e7
--- /dev/null
+++ b/portfolio-view/src/components/tech/TechStackSection.tsx
@@ -0,0 +1,164 @@
+const TECH = [
+  {
+    label: 'Java',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <path d="M20.2 31.6s-1.8 1 1.3 1.4c3.7.4 5.6.4 9.7-.4 0 0 1.1.7 2.6 1.2-9.2 3.9-20.8-.2-13.6-2.2z" fill="#5382a1"/>
+        <path d="M19 28.7s-2 1.5 1.1 1.8c4 .4 7.2.5 12.7-.6 0 0 .7.8 1.9 1.2-11.2 3.3-23.7.3-15.7-2.4z" fill="#5382a1"/>
+        <path d="M26.3 20.1c2.3 2.6-.6 5-.6 5s5.8-3 3.1-6.7c-2.5-3.5-4.4-5.2 5.9-11.2 0 0-16.1 4-8.4 12.9z" fill="#e76f00"/>
+        <path d="M34.8 34.4s1.3 1.1-1.5 2c-5.3 1.6-22 2.1-26.7.1-1.7-.7 1.5-1.8 2.5-2 1-.2 1.6-.2 1.6-.2-1.8-1.3-11.9 2.5-5.1 3.6 18.5 3 33.7-1.3 29.2-3.5z" fill="#5382a1"/>
+        <path d="M21 24.4s-8.4 2-3 2.7c2.3.3 6.9.2 11.1-.1 3.5-.3 7-.9 7-.9s-1.2.5-2.1 1.1c-8.5 2.2-24.9 1.2-20.2-.9 4-1.9 7.2-1.9 7.2-1.9z" fill="#5382a1"/>
+        <path d="M30.9 29.9c8.6-4.5 4.6-8.8 1.8-8.2-.7.1-1 .3-1 .3s.3-.4.8-.6c5.7-2 10.1 5.9-1.8 9-.1 0 .1-.1.2-.5z" fill="#5382a1"/>
+        <path d="M23.7 38.4s1 .9-1.1 1.5c-4 1.2-16.7 1.6-20.2.1-1.3-.6 1.1-1.4 1.9-1.5.8-.2 1.2-.1 1.2-.1-1.4-1-9 2-3.9 2.8 14 2.3 25.5-1 22.1-2.8z" fill="#5382a1"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'Spring Boot',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <path d="M43.8 9.7a21.8 21.8 0 0 1-2.5 4.5A22 22 0 0 0 24 6C13 6 4 15 4 26s9 20 20 20 20-9 20-20c0-4.6-1.6-8.9-4.2-12.3z" fill="#6db33f"/>
+        <path d="M40.7 7.5c-.3 1.6-1.1 3-2.2 4.1a3 3 0 0 1-4.2 0 3 3 0 0 1 0-4.2c1-.9 2.4-1.7 4-2 .8-.1 1.7 0 2.4.2.2.6.2 1.3 0 1.9z" fill="#6db33f"/>
+        <path d="M24 13c-7.2 0-13 5.8-13 13s5.8 13 13 13 13-5.8 13-13-5.8-13-13-13zm0 21a8 8 0 1 1 0-16 8 8 0 0 1 0 16z" fill="white"/>
+        <circle cx="24" cy="26" r="4" fill="#6db33f"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'React',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <ellipse cx="24" cy="24" rx="4" ry="4" fill="#61dafb"/>
+        <ellipse cx="24" cy="24" rx="20" ry="7.5" stroke="#61dafb" strokeWidth="2" fill="none"/>
+        <ellipse cx="24" cy="24" rx="20" ry="7.5" stroke="#61dafb" strokeWidth="2" fill="none" transform="rotate(60 24 24)"/>
+        <ellipse cx="24" cy="24" rx="20" ry="7.5" stroke="#61dafb" strokeWidth="2" fill="none" transform="rotate(120 24 24)"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'TypeScript',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <rect x="4" y="4" width="40" height="40" rx="4" fill="#3178c6"/>
+        <path d="M22 20h-6v-3h15v3h-6v14h-3V20z" fill="white"/>
+        <path d="M29 30.5c0 1 .8 1.8 2.3 1.8 1.3 0 2-.6 2-1.5 0-.9-.6-1.4-2-1.8l-.9-.3c-2.1-.6-3.1-1.6-3.1-3.2 0-2 1.7-3.3 4-3.3 2.2 0 3.8 1.2 3.8 3.1h-2.4c0-.9-.6-1.5-1.7-1.5-1 0-1.6.5-1.6 1.3 0 .8.5 1.2 1.8 1.6l.8.2c2.4.7 3.4 1.7 3.4 3.4 0 2.2-1.7 3.5-4.3 3.5-2.5 0-4.1-1.3-4.1-3.3H29z" fill="white"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'PostgreSQL',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <ellipse cx="24" cy="14" rx="14" ry="8" fill="#336791"/>
+        <path d="M10 14v16c0 4.4 6.3 8 14 8s14-3.6 14-8V14" stroke="#336791" strokeWidth="2" fill="none"/>
+        <ellipse cx="24" cy="14" rx="14" ry="8" fill="#336791"/>
+        <path d="M10 22c0 4.4 6.3 8 14 8s14-3.6 14-8" stroke="#4a7fb5" strokeWidth="1.5" fill="none"/>
+        <path d="M10 18c0 4.4 6.3 8 14 8s14-3.6 14-8" stroke="#4a7fb5" strokeWidth="1.5" fill="none"/>
+        <path d="M34 10c3 1.5 4 3 4 4" stroke="#6ca0c8" strokeWidth="1.5" strokeLinecap="round"/>
+        <circle cx="35" cy="8" r="3" fill="#4a7fb5"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'Docker',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <rect x="6" y="18" width="6" height="5" rx="1" fill="#2496ed"/>
+        <rect x="13" y="18" width="6" height="5" rx="1" fill="#2496ed"/>
+        <rect x="20" y="18" width="6" height="5" rx="1" fill="#2496ed"/>
+        <rect x="20" y="12" width="6" height="5" rx="1" fill="#2496ed"/>
+        <rect x="27" y="18" width="6" height="5" rx="1" fill="#2496ed"/>
+        <rect x="13" y="12" width="6" height="5" rx="1" fill="#2496ed"/>
+        <path d="M42 22c-1-2-4-2.5-5.5-2.5-.3-2.5-2-4.5-4-4.5h-1c.5 1 .5 2 .5 3H33v2h-6v-2h-1V16h-6v2h-1v-4h-6v4H7C5 18 4 19 4 21c0 5 3.5 9 8.5 9h18c4 0 7.5-2.5 8.5-6 1.5 0 2.5 0 3-2z" fill="#2496ed"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'Kafka',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <circle cx="24" cy="10" r="5" fill="#231f20" stroke="#ffffff" strokeWidth="1.5"/>
+        <circle cx="10" cy="34" r="5" fill="#231f20" stroke="#ffffff" strokeWidth="1.5"/>
+        <circle cx="38" cy="34" r="5" fill="#231f20" stroke="#ffffff" strokeWidth="1.5"/>
+        <line x1="24" y1="15" x2="14" y2="30" stroke="#ffffff" strokeWidth="1.5"/>
+        <line x1="24" y1="15" x2="34" y2="30" stroke="#ffffff" strokeWidth="1.5"/>
+        <circle cx="24" cy="24" r="4" fill="#231f20" stroke="#ffffff" strokeWidth="1.5"/>
+        <line x1="24" y1="28" x2="14" y2="30" stroke="#ffffff" strokeWidth="1.5"/>
+        <line x1="24" y1="28" x2="34" y2="30" stroke="#ffffff" strokeWidth="1.5"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'Nginx',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <polygon points="24,4 42,14 42,34 24,44 6,34 6,14" fill="#009900"/>
+        <path d="M16 14h4l8 14V14h4v20h-4L20 20v14h-4V14z" fill="white"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'GitLab CI/CD',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <path d="M24 43L12 23l-8 0L24 5l20 18h-8L24 43z" fill="#e24329"/>
+        <path d="M24 43L12 23H4l8-10 12 30z" fill="#fc6d26"/>
+        <path d="M24 43L36 23l8 0L36 13 24 43z" fill="#fc6d26"/>
+        <path d="M4 23L12 13l0 10H4z" fill="#fca326"/>
+        <path d="M44 23L36 13l0 10H44z" fill="#fca326"/>
+      </svg>
+    ),
+  },
+  {
+    label: 'Linux',
+    icon: (
+      <svg viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg" className="w-10 h-10">
+        <ellipse cx="24" cy="18" rx="9" ry="12" fill="#f5c518"/>
+        <circle cx="20" cy="16" r="2" fill="#333"/>
+        <circle cx="28" cy="16" r="2" fill="#333"/>
+        <circle cx="20.5" cy="16.5" r=".7" fill="white"/>
+        <circle cx="28.5" cy="16.5" r=".7" fill="white"/>
+        <path d="M20 22c1.3 1.5 6.7 1.5 8 0" stroke="#333" strokeWidth="1.2" strokeLinecap="round" fill="none"/>
+        <path d="M15 30c0-5 4-9 9-9s9 4 9 9v2l2 4-2 1-2-3h-14l-2 3-2-1 2-4v-2z" fill="#f5c518"/>
+        <path d="M17 36l-4 4 2 2 4-3M31 36l4 4-2 2-4-3" stroke="#333" strokeWidth="1.2" strokeLinecap="round" fill="none"/>
+        <ellipse cx="24" cy="18" rx="4" ry="2" fill="#e6b800"/>
+        <path d="M15 22c-1 2-1 5 0 6M33 22c1 2 1 5 0 6" stroke="#ddb800" strokeWidth="1.2" strokeLinecap="round" fill="none"/>
+      </svg>
+    ),
+  },
+]
+
+export function TechStackSection() {
+  return (
+    <section id="tech-stack" className="py-24 px-6">
+      <div className="max-w-6xl mx-auto">
+        {/* Section header */}
+        <div className="mb-14">
+          <p className="font-mono text-xs text-accent tracking-widest mb-3 uppercase">
+            Stack
+          </p>
+          <h2 className="font-heading font-bold text-4xl md:text-5xl text-white tracking-tight">
+            Tech Stack
+          </h2>
+        </div>
+
+        {/* Grid: 3 cols mobile → 5 cols desktop */}
+        <div className="grid grid-cols-3 md:grid-cols-5 gap-4">
+          {TECH.map(({ label, icon }) => (
+            <div
+              key={label}
+              className="flex flex-col items-center justify-center gap-3 p-5 bg-zinc-900 border border-zinc-800 rounded-lg hover:border-zinc-600 hover:bg-zinc-800/70 transition-all duration-200 group"
+            >
+              <div className="opacity-90 group-hover:opacity-100 transition-opacity duration-200">
+                {icon}
+              </div>
+              <span className="font-mono text-xs text-zinc-400 group-hover:text-zinc-200 transition-colors duration-200 text-center leading-tight">
+                {label}
+              </span>
+            </div>
+          ))}
+        </div>
+      </div>
+    </section>
+  )
+}