🚀 Lead / Senior Backend Engineer (Python • Cloud • Distributed Systems) | AI/ML Enthusiast | Web3 & Blockchain Explorer | Open Source Builder
🏅 ICPC Gold Medalist
💡 Passionate about Python, Rust, Go, Ruby on Rails, DevOps, Cloud, Cybersecurity, and AI-powered Operating Systems

I’m a highly motivated Software Engineer with 5+ years of experience in Backend Development, DevOps, Blockchain, Cybersecurity, and AI/ML solutions.

I have worked at Noon, JiBE ERP, Pakwheels.com, and Ebryx, where I built scalable systems, optimized infrastructure, delivered production-ready services, and engineered cybersecurity & financial solutions.

• At Pakwheels.com (Pakistan’s #1 automotive classified), I worked as a Full Stack Developer (Ruby on Rails, React, Django), building high-traffic APIs and search systems serving millions of users.
• At Ebryx, I worked on Invisily (ZTNA product), focusing on Zero Trust Network Access, IAM, and cybersecurity architecture.
• At JiBE ERP, I engineered ERP financial workflows (invoicing, AR/AP, expense tracking) at scale.
• At Noon, I designed financial backend workflows for refunds, claims, cashback, and invoicing — saving $1.2M+ annually through automation.

Recognized as an ICPC Gold & Silver Medalist, I bring strong problem-solving and system design expertise to every project.

• Python (FastAPI, Django, Flask, aioHTTP)
• Rust (systems & OS-level development)
• Go (Golang) (microservices, distributed systems, blockchain)
• Ruby on Rails (full-stack web applications)
• C, C++ (competitive programming & performance engineering)
• JavaScript/TypeScript (React, Next.js, Node.js)
• Kotlin & Java (Android & backend tools)

• AWS (ECS, RDS, S3, Lambda, ALB, IAM)
• Docker & Kubernetes (container orchestration & deployment)
• Terraform & Ansible (infrastructure as code & automation)
• CI/CD: Jenkins, GitHub Actions, GitLab CI/CD
• Monitoring: Prometheus, Grafana, ELK stack, OpenTelemetry

• SQL: PostgreSQL, MySQL, Elasticsearch
• NoSQL: MongoDB, Redis, ArangoDB

• Machine Learning & NLP: Scikit-learn, HuggingFace, LangChain
• RAG Systems (Retrieval-Augmented Generation)
• Computer Vision: OpenCV, TensorFlow Lite
• Custom AI Agents for task automation

• Ethereum (Solidity, Smart Contracts, DApps, DeFi, NFTs)
• Hyperledger Fabric (enterprise blockchain)
• Web3.js, Ethers.js, Hardhat, Truffle

• ZTNA (Zero Trust Network Access)
• Invisily (Ebryx) experience in secure access solutions
• IAM, Audit Logging, Data Integrity, Secure Backend Engineering

A modern Learning Management System (LMS) for schools, colleges, and universities.

• Stack: FastAPI, React/Next.js, PostgreSQL, Docker
• Features: Role-based access, online classes, exams, reports
• SEO Keywords: LMS software, FastAPI school system, education technology platform
  🔗 GitHub Repo

An AI-powered, cross-platform operating system with Rust kernel + Flutter GUI.

• Runs on PC (x86_64) and Smartphones (ARM64)
• Supports local + server-based AI for low-power devices
• SEO Keywords: Rust OS, AI-powered operating system, Flutter GUI kernel
  🔗 GitHub Repo

A personal knowledge management system with FastAPI + LangChain RAG.

• AI-assisted querying, contextual search
• SEO Keywords: AI note-taking, LangChain RAG, FastAPI AI project
  🔗 GitHub Repo

Android app integrating CV + radar sensors for real-time detection.

• Stack: Kotlin, TensorFlow Lite, USB radar sensors
• SEO Keywords: Kotlin CV, radar sensor detection, Android AI app
  🔗 GitHub Repo

Stack: Python (FastAPI/Flask), Go, Java (Spring Boot – BNPL), SQLAlchemy, PostgreSQL, Redis, Google Pub/Sub, BigQuery, Docker/K8s, AWS/GCP, Prometheus/Grafana, OpenTelemetry, Nginx, Vonage, Meta/WhatsApp Business API, ZOHO/Zendesk

• Architected and delivered distributed, event‑driven microservices that transformed the post‑purchase journey across Payments, Logistics, and Aftersales. Split monolithic flows into modular FastAPI endpoints and FE modules, improving resiliency and speed of change.
• Built and optimized services for order lifecycle, payments, cashback, and refunds—including a scalable cashback engine and doorstep exchange system that yielded substantial operational savings.
• Drove a 95% reduction in daily support contacts by redesigning returns/exchange flows with idempotent consumers, sagas/outbox, guardrails, and full observability (OTel + Prom/Grafana).
• Migrated notifications from SMS → WhatsApp via Vonage + Meta Business APIs, cutting messaging costs ~70% and increasing delivery reliability.
• Deployed ML models (instant refund eligibility; Gemini for content moderation) to automate decisions and streamline compliance in returns workflows.
• Launched fulfillment orchestration for Namshi Supermall & Avenue, integrating Noon Food logistics to enable hyperlocal ~90‑minute deliveries, driving strong monthly order growth.
• Migrated the ticketing platform Zendesk → ZOHO, reducing licensing spend ~70%; built seller‑support & dispute tools to onboard new stores and speed resolution.
• Automated GCP ops for log/data retention, backups, and analytics dashboards in BigQuery for real‑time operational insights.
• Contributed to Noon BNPL: architected distributed microservices (Java Spring Boot, Python, Go), delivered secure REST/SOAP APIs, integrated OAuth2/SAML, ensured compliance, and led third‑party integrations.
• Led a 7‑member squad (2 backend, 3 frontend, 2 backend interns) as the primary POC for Aftersales; owned roadmaps, estimations, and cross‑team alignment. Drove design/PR reviews & peer reviews, mentored engineers, facilitated stakeholder sessions, and standardized service templates (structured logging, tracing, graceful shutdown).

• Engineered ERP finance modules (AR/AP, invoicing, reconciliation).
• Refactored monolith into modular services for scalability.
• Built async pipelines for ERP transactions using Dramatiq/Celery.

• Developed high-traffic APIs and search systems serving millions of users.
• Optimized queries → reduced page load time from 1.2s → 200ms.
• Worked in Ruby on Rails + React, delivering end-to-end marketplace features.

• Contributed to Invisily (ZTNA product) for secure, zero-trust network access.
• Built cross-platform secure backend APIs (Python + C++14).
• Strengthened encryption, compliance, and IAM in enterprise cybersecurity systems.

• 🥇 ICPC Asia Gold Medalist
• 🥈 ICPC Asia Silver Medalist
• 💼 Delivered enterprise DevOps pipelines saving $100k+ annually
• 🏗 Built LMS, AI-powered OS, ERP, ZTNA & blockchain projects

• 💼 LinkedIn: linkedin.com/in/muhammad-waleed-khalid-38a59419a
• 🌍 Portfolio: www.waleedkhalid.me
• 📧 Email: [email protected]

✨ Always open to collaborations, open-source contributions, and freelance projects.
💡 My goal: Build systems that scale & empower people with AI, Cloud, and Blockchain.