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📅 Timeline: 8 Days 🏁 Built for BalkanID 80 LPA Full-Time Hiring Challenge (September 2025) (In 6 Days as Solo Developer -> Ideation + Architecture + Coding + Testing + Cloud Deployment + Extras -> 2 Days Edge Native - Serverless Optimization)

Built a production-grade secure file vault with intelligent deduplication, custom JWt implementation with token generation, claim-based access control, token verification, refresh token, advanced sharing, and comprehensive analytics in just 6 days - then revolutionized its architecture in 2 more days to achieve near-zero costs.

• 💰 Cost Optimization: Reduced from $204/year → $0 (Year 1), $108/year (Year 2+) = 47% permanent savings
• ⚡ Performance: <100ms metadata, <500ms uploads with edge caching
• 🔒 Security: RS256 JWT, bcrypt hashing, MIME validation, SHA-256 deduplication
• 📊 Efficiency: 30-40% storage savings through intelligent deduplication
• 🌍 Global: Distributed edge architecture with <50ms response times
• 📈 Scale: Designed to handle 10K+ req/sec with zero-cost scaling

Backend: Go, GraphQL, PostgreSQL, Redis, MinIO Frontend: Next.js 14, TypeScript, Tailwind CSS Cloud: AWS (t2.micro), Vercel, Cloudflare Workers/KV/R2, Neon PostgreSQL DevOps: Docker, Nginx, SSL/TLS, GitHub Actions

• 🧠 Intelligent Deduplication: SHA-256 hash-based duplicate detection
• 🔐 Zero-Client Architecture: All client side sent data are cross-verified before use.
• ⚡ Real-time Processing: Async uploads with live progress tracking
• 🎯 Advanced Search: Multi-criteria filtering with tag support
• 📊 Admin Analytics: Comprehensive system monitoring
• 🔗 Flexible Sharing: Private user sharing + public link sharing
• 🚀 Rate Limiting: Redis-based throttling (2 req/s user, 10 req/s IP)

✅ Monoliths are expensive for unpredictable traffic ✅ Serverless architecture enables true pay-as-you-go economics ✅ Edge-native is the future: low latency + zero idle costs ✅ Free tiers are powerful when architected correctly

👨‍💻 Role: Founder & Solo Developer 🏛️ Registered: MSME – Govt of India 📅 Timeline: June 2025 – Present

Transforming how professionals manage and optimize their resumes with AI driven resume rewriting, ATS optimization, JD Matching, version control, personal vaults, resume to portfolio.

• 🤖 AI Resume Optimization Agent

  • Gemini, Chatgpt, claude, mistral used in fallback manner
  • Job-specific structured prompts
  • Section-wise ATS optimization
  • Can rewrite whole resume under 30 seconds.
  • Preserved Links original data accuracy.
  • Hallucination Control using algorithmic prompt.
  • Token Optimization for cost and ratelimits.

• 📊 Instant ATS Analyzer

  • Real-time scoring and feedback
  • Keyword optimization suggestions
  • Format compatibility checking
  • ATS parsability detection
  • Complex layout, missing section, word density etc. detection correction.

• 📊 Custom VersionCV Editor (zero dependency)

  • React Powered WYSIWYG Editor with ATS Scanner Integrated.

• 🗂️ Smart Resume Management

  • Role-based version control
  • Shareable, CDN-accessible links
  • Cloudflare R2 storage with versioning
  • Clone and edit.
  • Can do resume correction even after link submission replace original at same link.
  • Track Analytics for each of the resume file, role, vault.

• 🔐 Enterprise Security

  • Firebase JWT authentication on each request. (1ms full claims verification)
  • Email verification.
  • Zero Client Trust model.
  • Main DB and buckets accessible only by internal api( no dns ) accessible through rpc calls only.
  • API interlocking using different secrets for each and are present only on the cloudflare secret manager.
  • Multiple layer of DDOS mitigation strategy, Cloudflare, internal Rate Limiter with 4 fallbacks.

Architecture: Fully decoupled, edge-native serverless, multi-cloud microservices Deployment: Google Cloud Run, Vercel Edge, Cloudflare Workers, D1/R2/Queue/KV Cache/Durable Objects/Cloudflare CDN Performance: <100ms latency, 10K+ req/sec capability, 99.9% uptime Security: DDoS protection, bot verification, Firebase JWT auth, API interlocking using internal secrets, Ratelimiter with 4 layered fallback mechanism

• Primary DB: Cloudflare D1 (SQLite) with fallback protection
• Caching: KV Cache Cloudflare CDN with real-time invalidation (>99% hit rate)
• Storage: Cloudflare R2 for CDN-accessible, versioned resumes
• Optimization: Batch-based DB updates preventing race conditions

Running on ₹900/year (domain only) – entire infrastructure on zero-cost tiers!

I'm open to working on high-impact projects involving:

• 🏗️ Complex distributed architectures
• ☁️ Cloud cost optimization and automation
• ⚡ High-performance API design
• 🚀 Serverless and edge computing
• 🔐 Security-first system design

Let's build something amazing together! 🚀

Building production-grade secure systems that scale efficiently and cost-effectively