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I love code 🧩
I'm a Full-Stack Engineer who leads with a problem-solving mindset — I don't just write code, I dissect problems and build systems that last. My work spans MERN stack, microservices, and scalable SaaS platforms, all grounded in clean architecture and real-world engineering standards.
const AbuTalha = {
role: "Full-Stack Engineer & Problem Solver",
stack: ["MongoDB", "Express", "React", "Node.js", "Next.js", "TypeScript"],
architecture: ["Microservices", "Clean Architecture", "Event-Driven", "SaaS"],
learning: ["AWS", "Docker", "Turborepo", "System Design"],
focus: "Problem Solving → DSA → Scalable Systems",
linkedin: "https://www.linkedin.com/in/abutalha-khalil-4256aa20b/",
email: "[email protected]",
portfolio: "talha-xp-portfolio.vercel.app",
available: true,
};- 🧩 Problem Solver first — I approach every project by understanding the why before the how
- 🔭 Building microservices, SaaS platforms & distributed systems
- 🌱 Deepening skills in TypeScript, Turborepo, AWS & DevOps
- 📐 Practicing System Design — scalability, caching, event-driven patterns
- 🧠 Sharpening DSA — LeetCode patterns, Big-O analysis, graph algorithms
- 🎯 Goal: Become a world-class problem solver & system architect
- 📫 Email: [email protected]
Production-grade e-commerce built on a Turborepo monorepo with true microservices separation. Each service (catalog, cart, orders, payments) runs independently using Fastify, Express, Hono, with MongoDB & PostgreSQL and Clerk for authentication.
Turborepo Fastify Hono Express MongoDB PostgreSQL Clerk TypeScript Docker
Full-featured clinic SaaS with 4 dedicated dashboards — Doctor, Patient, Receptionist & Admin. Real-time appointment scheduling, patient records, billing, and role-gated access across all portals.
React Node.js MongoDB Express Redux Toolkit TailwindCSS JWT Socket.io
WebSocket-powered chat with rooms, presence detection, file sharing & Redis message persistence.
Socket.io React Node.js MongoDB Redis JWT
A social media platform centered around long-form content — users write, publish, and read articles. Includes follow systems, reactions, bookmarks, and a personalized feed algorithm.
React Node.js MongoDB Express TailwindCSS JWT
A Chrome extension that surgically blocks distraction features on social media platforms (feeds, reels, suggested content) without removing the whole site — stay productive without going cold turkey.
Chrome Extensions API JavaScript HTML CSS
Scalable blog platform with a microservices backend — separate services for posts, users, comments, and media. Fully containerized with independent deployments per service.
Node.js Express MongoDB Docker React TypeScript
| Category | Structures |
|---|---|
| Linear | Array, Linked List (Singly / Doubly), Stack, Queue, Deque |
| Trees | BST, AVL Tree, Red-Black Tree, Heap (Min/Max), Trie, Segment Tree |
| Graphs | Adjacency List / Matrix, Weighted & Directed Graphs |
| Hashing | HashMap, HashSet, Collision Handling (Chaining, Open Addressing) |
| Advanced | Monotonic Stack, LRU Cache, Disjoint Set (Union-Find) |
| Algorithm | Best | Average | Worst | Space |
|---|---|---|---|---|
| Binary Search | O(1) | O(log n) | O(log n) | O(1) |
| Merge Sort | O(n log n) | O(n log n) | O(n log n) | O(n) |
| Quick Sort | O(n log n) | O(n log n) | O(n²) | O(log n) |
| Heap Sort | O(n log n) | O(n log n) | O(n log n) | O(1) |
| BFS / DFS | O(V+E) | O(V+E) | O(V+E) | O(V) |
| Dijkstra | O(E log V) | O(E log V) | O(E log V) | O(V) |
| Dynamic Programming | O(n) | O(n²) | O(n³) | O(n) |
| HashMap Lookup | O(1) | O(1) | O(n) | O(n) |
Two Pointers → Pair sums, palindrome checks, container problems
Sliding Window → Subarray / substring, max/min in window
Fast & Slow Ptr → Cycle detection, middle of linked list
Binary Search → Search in rotated array, first/last position
Prefix Sum → Range queries, subarray sum equals k
Tree Traversal → Inorder, Preorder, Postorder, Level-order (BFS)
Graph Algorithms → BFS, DFS, Topological Sort, Dijkstra, Union-Find
Dynamic Prog. → Knapsack, LCS, LIS, Coin Change, Edit Distance
Backtracking → Permutations, Combinations, N-Queens, Sudoku
Greedy → Activity Selection, Interval Scheduling, Huffman
Bit Manipulation → XOR tricks, power of two, subset enumeration
Divide & Conquer → Merge sort, binary search, Karatsuba
| Pillar | Concepts |
|---|---|
| Scalability | Horizontal scaling, Load balancing, Sharding, CDN, Stateless services |
| Reliability | Circuit Breaker, Retry logic, Rate limiting, Health checks, Failover |
| Caching | Redis, Write-through / Write-back, Cache invalidation, LRU / LFU |
| Databases | SQL vs NoSQL, ACID vs BASE, Indexing, Replication, CAP Theorem |
| Messaging | Pub/Sub, Message queues (BullMQ), Event-driven, Webhooks |
| API Design | REST best practices, GraphQL, Versioning, Pagination, Idempotency |
| Security | JWT, OAuth 2.0, RBAC, HTTPS, Input validation, Rate limiting |
| Observability | Logging, Metrics, Distributed tracing, Alerting |
Clean Architecture → Separation of concerns, dependency inversion
Repository Pattern → Abstract data access layer
Service Layer → Business logic isolation
Factory Pattern → Object creation abstraction
Singleton → Single instance services (DB connections)
Observer / Event Bus → Decoupled communication between modules
Middleware Pattern → Cross-cutting concerns (auth, logging, validation)
Dependency Injection → Testable, loosely coupled code
CQRS → Separate read and write models
Event Sourcing → Audit trail, time-travel debugging
S → Single Responsibility — Each class / function does ONE thing
O → Open / Closed — Open for extension, closed for modification
L → Liskov Substitution — Subtypes must be substitutable for base types
I → Interface Segregation — No client should depend on unused methods
D → Dependency Inversion — Depend on abstractions, not concretions✅ MERN Stack Mastery → MongoDB · Express · React · Node.js (production-level)
✅ TypeScript & Next.js 14 → App Router, Server Components, advanced patterns
✅ Clean Architecture & SOLID → Repository, Service Layer, DI, design patterns
✅ Microservices → Turborepo, service isolation, inter-service comms
🔄 System Design → Distributed systems, cloud-native, scalability patterns
🔄 DevOps & Cloud (AWS) → Docker, Kubernetes, CI/CD, infrastructure as code
🔄 DSA & LeetCode Patterns → 100+ problems, all major patterns
⏳ FAANG Interview Prep → System design interviews, behavioral rounds
⏳ Open Source Contributions → React, Next.js or major JS ecosystem projects
"I don't just build features — I solve problems. Every system I design starts with a deep understanding of the problem, and ends with clean, scalable code that holds up in production."
⭐ From Abu Talha · Let's connect on LinkedIn or check out my Portfolio!