Open to new opportunities
Awais Waheed
Senior Backend Engineer specializing in high-throughput distributed systems and event-driven architectures. 6+ years building production systems in Java at scale — currently owning a mission-critical streaming pipeline at 7-Eleven's delivery platform. Deep experience with AWS, reactive programming, microservices, and cloud migrations. Previously at Walmart via Confiz.
02 / EXPERIENCE
Work Experience
6+ years building distributed systems and event-driven architectures at scale.
- Scaled reactive event-streaming pipeline from 400K to 1M messages/day on a single instance by restructuring transaction boundaries, scoping writes, and enforcing query timeouts
- Diagnosed and resolved a 3-day undetected production outage (50 DB connections exhausted): traced connection timeouts through DLQ spikes to legacy reactive chain queries — pool exhaustion eliminated, throughput doubled
- Engineered ingress layer with manual Kinesis shard acknowledgment to enforce strict message ordering without sacrificing throughput
- Designed DLQ failure pipeline with retry scheduling and MongoDB persistence — zero silent data loss across all failure scenarios
- Migrated Streaming Service infrastructure from Azure (Event Hub) to AWS (Kinesis, Secrets Manager, pod-based IAM roles)
- Resolved 8–10 integration bugs across 3PL and Skipcart services where malformed payload formatting caused downstream systems to silently fail — restoring correct functional behavior across delivery workflows
- Configured MCP servers for GitHub, Jira, and Confluence; used GitHub Copilot Workspace to scaffold automation testing workflows
03 / SKILLS
Technical Skills
Technologies and practices I use to build production systems at scale.
Languages
Frameworks & Libraries
Cloud & Infrastructure
Databases
Tools & Practices
04 / PROJECTS
Selected Projects
Production systems and personal builds demonstrating depth across the stack.
Resolve Tech Solutions (Client: 7-Eleven)
ProfessionalStreaming Service — 7-Eleven DaaS
Event-driven delivery pipeline consuming real-time order events from DoorDash, UberEats, and Skipcart. Reactive, non-blocking Java architecture processing 1M+ messages/day on a single instance. Includes DLQ failure handling, idempotent processing, manual Kinesis shard acknowledgment for ordering, and configurable retry scheduling.
Confiz Ltd. (Client: Walmart)
ProfessionalGPH Carbon — Walmart Pharmacy
Cloud migration of Walmart's HQ pharmacy software. Managed workorder approvals and store update packages across 5,000+ U.S. locations using Spring Boot microservices and AWS CI/CD pipelines.
Personal Project
PersonalMarketPlace Pro
Full-stack e-commerce platform with user roles, product management, order tracking, JWT auth, payment integration, and S3 file uploads. Deployed on AWS.
Personal Project
PersonalEvent Management System
Full-stack event platform with ticket booking, payment integration, JMS messaging, and pessimistic locking to handle concurrent bookings. Deployed on AWS.
Personal Project
PersonalExpense Tracker
Full-stack expense tracker with add/edit/delete/filter functionality, category breakdowns, and clean REST APIs.
Personal Project
PersonalDictionary App
Word search and definitions app with top-searched word tracking optimized for query performance with indexed lookups.