Wahab Ejaz
Software Engineer
/in/abdul-wahab-299554266
Summary
Dedicated Software Engineer with expertise in Ruby on Rails development, API design, and scalable architectures. Skilled in building high-performance e-commerce platforms, integrating third-party services, and implementing complex business logic for large-scale applications. Strong knowledge of database optimization, caching, microservices, and background processing, with proven success in improving system efficiency and reliability.
Overview
2
2
years of professional experience
Work History
Software Engineer
Elgrocer by Smiles (Etisalat Group)
08.2023 - Current
- API Development & Architecture: Designed and maintained RESTful APIs handling 50K+ daily requests across multiple versions (v1–v5) using Grape, token-based authentication, and RBAC.
- Payments & Promotions: Integrated the Tabby installment gateway, built a wallet transaction engine with credit/debit flows, and developed a promo system with complex discount rules, usage limits, and B2B-specific campaigns.
- Order Management & Delivery Intelligence: Implemented multi-shipment order architecture, integrated Locus API for real-time ETAs, and developed AI-driven vehicle assignment for optimal delivery efficiency.
- Performance Optimization: Reduced database load by 60% using Redis caching, N+1 query optimization, and Sidekiq background jobs for notifications, analytics imports, and order feedback.
- Security & Compliance: Implemented IP-based rate limiting, OTP-based bilingual (EN/AR) email verification, and configurable throttling with cooldown protection.
- B2B Workflow Automation: Streamlined B2B onboarding by integrating third-party CRM synchronization, enabling real-time rewards accrual and tiered benefit allocation for corporate partners.
Education
Bachelor of Computer Science - Computer Science
FAST(National University of Computer And Emerging Sciences)
Islamabad, Pakistan 04.2001 -
Skills
Ruby on Rails
RESTful APIs, Grape Framework, GraphQL
Algolia Search
Metabase
Sidekiq, Resque
Tabby, EPG (Etisalat), Online payment gateways
PostgreSQL, MongoDB, Redis, SQLite
AWS(S3), Heroku, Azure
GitHub, Docker, Microservices Architecture
Rack::Attack, Active Interaction, i18n, Throttling
HTML, CSS, JavaScript, CoffeeScript
Timeline
Software Engineer
Elgrocer by Smiles (Etisalat Group)
08.2023 - Current
Bachelor of Computer Science - Computer Science
FAST(National University of Computer And Emerging Sciences)
04.2001 -