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Usaid-Bin-Rehan/README.md

Hi there, I'm Usaid Bin Rehan πŸ‘‹

Usaid Bin Rehan

πŸ‘¨β€πŸ’» About Me

Coding

  • πŸ’Ό Software Engineer at AKSiQ (Jan 2026 – Present)
  • 🧠 Backend & Distributed Systems Specialist with strong focus on .NET Core, Enterprise Microservices, and Cloud-Native Architectures
  • πŸ€– Deeply interested in Agentic AI, LLMs, and RAG-based enterprise solutions
  • πŸ—οΈ Advocate of Clean Architecture, SOLID principles, and scalable system design
  • πŸ§‘β€πŸ« Mentored 5+ interns and junior engineers through production-grade onboarding and architecture reviews

πŸ’Ό Professional Experience

🏒 AKSiQ β€” Software Engineer

Jan 2026 - Present

🏒 QBS Co. β€” Software Engineer

June 2024 – Jan 2026

  • Developed and maintained high-performance backend APIs using ASP.NET Core, PostgreSQL, and EF Core
  • Led architectural consistency across microservices, reducing technical debt and improving maintainability
  • Enabled scalable inter-service communication using gRPC and NATS
  • Orchestrated Docker and Kubernetes deployments with readiness/liveness probes
  • Introduced unit testing strategies and improved sad-path coverage for critical workflows
  • Collaborated cross-functionally with Analytics, UI/UX, SDET, DevOps, and stakeholders
  • Delivered L3 production support, resolving slow queries, hotfixes, and live incidents
  • Actively participated in requirement analysis, WBS refinement, and documentation

πŸ› οΈ Tech Stack

πŸ§‘β€πŸ’» Backend & Databases

C# .NET Postgres SQL Server Redis

🧩 Architecture & Messaging

Microservices Clean Architecture SOLID gRPC NATS RabbitMQ

☁️ DevOps & Cloud

Docker Kubernetes Azure AWS

πŸ€– Agentic AI & R&D

LLMs RAG LangChain FastAPI PgVector FAISS


πŸŽ“ Education

FAST National University of Computer & Emerging Sciences

BS Computer Science


πŸš€ Key Projects

πŸ” Lockkeyz (PASHA ICT 2025 Security Award)

.NET 8 Β· Redis Β· gRPC Β· Ocelot

  • Designed reusable core architecture adopted across multiple enterprise systems
  • Implemented JWT-based Auth, RBAC, Redis session manager, and notification gRPC service
  • Introduced FluentValidation, Idempotent Keys, Quartz Scheduler, and distributed locks (Redlock)
  • Conducted POCs for Nginx and API Gateway strategies prior to Kubernetes migration

🚚 PSO Blue Cylinder Delivery

.NET API Β· Postgres Β· Kubernetes Β· PowerBI

  • Refactored a tightly coupled legacy monolith under production pressure
  • Designed RBAC system using optimized in-memory data structures
  • Delivered delayed referral feature integrating payment gateways and wallets via gRPC
  • Optimized cron-based workflows and supported PowerBI CDC-based reporting

🧰 Ajeek CRM & Field Service (Saudi)

.NET 8 Β· SignalR Β· NATS Β· Kubernetes

  • Built real-time chat using SignalR (SSE + sockets)
  • Integrated NATS JetStream for low-latency notifications
  • Delivered client’s most praised feature with minimal QA feedback

🏭 Plant Asset Maintenance

.NET 8 Β· Redis Β· Quartz Β· gRPC Β· Kubernetes

  • Architected foundational microservices (Auth, WorkCenter, Cronjob, Ordering)
  • Optimized Redis performance reducing scan times from minutes to seconds
  • Designed custom IQueryable extensions for high-performance filtering

🧠 Talent & Human Capital Management (Agentic AI)

.NET 8 Β· Redis Β· RAG Β· Agentic AI

  • Refactored AI prototype into enterprise-grade, package-free .NET template
  • Implemented Redis-backed agent memory with LLM FinOps optimizations
  • Prototyped multitenancy and evaluated OIDC SSO & LinkedIn integrations

Pinned Loading

  1. ChatCraft24_Winning_Submission ChatCraft24_Winning_Submission Public archive

    FAST-NUCES Procom'24 Competition

    Jupyter Notebook

  2. FAST_Resources_Reverse_Indexing FAST_Resources_Reverse_Indexing Public

    Search-Engine for FAST-Resources

    Jupyter Notebook 1 2

  3. Omdena_Omdi_RASA_3x_GPT Omdena_Omdi_RASA_3x_GPT Public archive

    Forked from OmdenaAI/nigeria-chapter-interactive-chatbot

    Cost-Effective Fallback & GPT & FAISS

    Python

  4. AI_Mustaqbil_2_Hackathon_GTM_Copilot AI_Mustaqbil_2_Hackathon_GTM_Copilot Public

    Forked from alizuberi580/AI-sales-agent

    10-MultiAgentic B2B lead-generation

    Python

  5. RPA_FuzzyMatcher RPA_FuzzyMatcher Public

    Fuzzy-Match ERP Clean-VSA FastAPI

    Python

  6. IT_Support_System IT_Support_System Public

    BeeGo-MVC SRE/DevOps-ITS

    Go