Full-Stack Web Applications
End-to-end product builds — modern React/Next.js frontends, Node.js or Spring Boot backends, and PostgreSQL/MongoDB data layers — from concept to production deployment.
RIYADH · SAUDI ARABIA · الرياض
Obaid Ullah
Senior Software Engineer — I build scalable software across the full stack, from distributed systems to AI-powered products.
Production systems for STC, Telenor, DarbPay, Al Baladi Group, and 40+ businesses across France.
6+ years shipping products across fintech, IoT, telecom, and e-commerce in four markets. Currently at STC in Riyadh, architecting an enterprise location-analytics platform.
01
About
Full Stack Engineer with 6+ years of experience building scalable, high-performance systems across telecom, fintech, IoT, and e-commerce. My work spans the full stack: backend services in Node.js, TypeScript, Go, and Spring Boot; frontends in React and Next.js; and cloud infrastructure on GCP and AWS. I specialize in distributed systems — event-driven microservices, message-driven architectures (Pub/Sub, RabbitMQ, MQTT), and real-time data pipelines processing events at scale.
I've shipped products across four markets — Saudi Arabia, Pakistan, Qatar, and France — and I build multilingual products with full Arabic/RTL support, a differentiator I care about deeply in the GCC market. I'm also expanding into AI engineering: LLM integration (OpenAI, Anthropic Claude), RAG pipelines with vector search (pgvector, Pinecone), and agentic workflows built on FastAPI and Go.
- 6+ years experience
- 4 markets shipped in
- 5,000+ vehicles connected
- SAMA-regulated fintech
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How I can help
I take on select engineering engagements alongside my full-time work.
APIs & System Integrations
REST and GraphQL APIs, third-party service integrations (payments, banking, government e-services, telematics), and event-driven architectures that keep systems decoupled and reliable.
Cloud, Performance & Modernization
Migrating legacy systems to cloud-native GCP/AWS, containerization with Docker, database and load-time optimization, and CI/CD pipelines for faster, safer releases.
Multilingual & RTL Products
Bilingual products done properly: Arabic/RTL layout, mixed-direction text, localized documents, and i18n architecture — a specialty for the GCC market.
AI Engineering & LLM Systems
RAG pipelines with vector search, LLM integration (OpenAI, Anthropic Claude), agentic tool-calling workflows, and production FastAPI/Go services — from prompt design to evaluation and guardrails.
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Experience
Mar 2026 – Present
Senior Full Stack Developer · STC
Riyadh, Saudi Arabia
- Architecting Slisor, an enterprise platform selling location and visitor analytics (footfall, visitor statistics) to enterprise customers — a product marketplace plus interactive market-intelligence dashboards on Google Cloud
- Building the customer-facing marketplace and guided subscription wizard: event description, map-based geographic area selection, and KPI/metric configuration, with end-to-end order tracking
- Implementing the full order lifecycle (submitted → changes requested → approved → in implementation → published) with role-based access across enterprise customers and internal EBU/BizOps operations
- Shipping bilingual English/Arabic product content within STC's corporate design system, with OTP-based MFA sign-in
Feb 2026 – Jul 2026 · 6-month contract
Senior Software Engineer · DarbPay
Riyadh, Saudi Arabia
- Built DarbPay, a SAMA-licensed corporate expense and AI fleet management platform (fleet fuel cards, procurement cards, digital petty cash)
- Event-driven microservices in Node.js/TypeScript on GCP Pub/Sub
- Integrations: Arab National Bank, Visa card issuing, ZATCA e-invoicing, Muroor traffic violations
- Multilingual notification & reporting systems with full Arabic/RTL support (VAT-compliant PDF/Excel reports, SAR handling)
- Client-facing features: referral program, spend controls, admin/client portals
- AI-assisted development workflows integrated into delivery
Mar 2024 – Feb 2026
Full Stack Developer – IoT & M2M · Telenor Pakistan
Islamabad, Pakistan
- Built AUXO, end-to-end IoT fleet & asset management platform: 5,000+ connected vehicles, real-time tracking, geofencing, fleet analytics
- Microservices + event-driven architecture with RabbitMQ; device pipelines over MQTT/TCP
- Migrated legacy systems to cloud-native AWS with Docker; 30% faster DB response times via indexing/query optimization
- Extended platform across AUXO Fleet, Cold Chain, Genset, Asset Management; contributed to M2M SIM Management Platform
- Supported 500% customer growth (2019–2023 platform period)
Aug 2022 – Feb 2024
Full Stack Developer / Associate Software Engineer · Evamp & Saanga
Islamabad, Pakistan
- React/Next.js frontends + Spring Boot backends for enterprise telecom clients; code reviews, testing, end-to-end feature ownership
Feb 2020 – Jul 2022
Frontend Web Developer · BHInternet
Évry-Courcouronnes, France
- Delivered dozens of production client websites for a French web agency; responsive design, performance optimization
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Featured Work
Three systems I've helped build end to end — an enterprise analytics marketplace, a regulated payments platform, and a telecom-scale IoT platform.
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Open Source & Projects
Selected Projects
Driverwave RiderApp
React.js · Node.js · Express · PostgreSQL · Microservices
- Built scalable ride-sharing platform supporting real-time GPS tracking, fare calculation, and payment processing
- Implemented microservices architecture with message queuing, handling 1,000+ concurrent users
- Developed admin dashboard for ride analytics, driver management, and revenue reporting
Einaya Takaful
Next.js · Redux · Node.js · MySQL · AWS
- Developed health insurance platform with automated claims processing, reducing processing time by 70%
- Implemented secure user authentication and role-based access control for different user types
- Deployed on AWS with auto-scaling capabilities, ensuring high availability during peak usage
Vogue Decor
Next.js · Shopify Headless · Tailwind CSS · Storefront API
- Engineered headless e-commerce solution integrated with Shopify, processing 500+ monthly orders
- Implemented server-side rendering for SEO optimization, improving search rankings by 60%
- Developed custom UI components with Tailwind CSS, ensuring brand consistency across platforms
Optiva Tec Selfcare
React.js · Context API · Material UI · React Hook Form
- Developed telecom self-care portal for 50,000+ customers to manage services and billing
- Implemented complex form validation and state management for seamless user experience
- Integrated with telecom backend systems for real-time data synchronization
Souq Al-Baladi — E-Commerce Platform
React.js · Node.js · Socket.io · Payment Gateways — Al Baladi Group, Qatar · 2022
- Developed an e-commerce platform supporting 5,000+ daily active users with real-time inventory management
- Implemented live order tracking and notifications with Socket.io, and integrated multiple payment gateways with an admin analytics dashboard
- Optimized performance for 50% faster load times through code splitting and lazy loading
Open Source
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Skills
AI Engineering
- LLM Integration (OpenAI, Claude)
- RAG / Vector Search (pgvector, Pinecone)
- Agentic Workflows
- Prompt Engineering
- LangChain
- FastAPI (Python)
Backend
- Node.js
- TypeScript
- Go
- Express
- Nest.js
- Spring Boot
- REST
- GraphQL
Frontend
- React
- Next.js
- Tailwind
- Material UI
Cloud & Infra
- GCP (Pub/Sub)
- AWS (Lambda, CDK)
- Docker
- CI/CD
Data & Messaging
- PostgreSQL
- Prisma
- MongoDB
- RabbitMQ
- MQTT
- Redis
Domains
- Location & Visitor Analytics
- Payments & Fintech
- IoT/M2M
- Arabic/RTL Localization
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Certifications
- Saudi Council of Engineers (SCE) – Member No. 1269876
- Pakistan Engineering Council (PEC) – PE Reg. COMP/21379
- AWS Certified Solutions Architect – Associate
- AI For Everyone (DeepLearning.AI)
- Crash Course on Python (Google)
- Software Engineering Virtual Experience
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Contact
Have a project, a role, or just need a hand with something technical? Reach out — email or WhatsApp is the fastest way. I'm based in Riyadh and open to relocation.
- i.obaidu5@gmail.com
- Phone (KSA)
- GitHub
- Riyadh, Saudi Arabia (open to relocation)