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Awais Waheed · Senior Backend Engineer · Irving, TX

Awais Waheed, Senior Backend Engineer. I build systems that fail loudly. And rarely.

Java, AWS, event-driven pipelines. The worst outage I've fixed had been failing silently for three days, so I build systems that can't: dead-letter queues, idempotent retries, and observability wired in from day one. Right now that means the event stream powering analytics and debugging for 7-Eleven's delivery platform. Before that, Walmart systems in 5,000+ U.S. stores.

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uptime · on-call SLA: 99.99%; uptime · on-call SLA
peak msgs/day: 1M+; peak msgs/day
stores · Walmart rollout: 5,000+; stores · Walmart rollout
years · production Java: 6+; years · production Java

Experience

Six years of production systems: streaming pipelines, retail infrastructure, and the outages in between.

Senior Backend Developer

Jul 2025 – Present

Resolve Tech Solutions — Client: 7-Eleven · Irving, TX

Contracted into 7-Eleven's Delivery as a Service (DaaS) platform — integrating DoorDash, UberEats, and Skipcart into a unified delivery layer.

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

Java · AWS Kinesis · AWS SQS · MongoDB · New Relic · AWS Secrets Manager · Reactor · Azure Event Hub

Senior Software Engineer

Jun 2025 – Jul 2025

Confiz Limited — AI Training Program · Bellevue, WA · Remote

Participated in an intensive internal AI training program focused on Python, LangChain, and Generative AI development
Gained hands-on experience with LLM integrations, prompt engineering techniques, and rapid prototyping of AI solutions
Built mini-projects involving data pipelines, ETL workflows, and orchestration tools for AI use-case implementations
Explored LangChain applications for retrieval-augmented generation (RAG) and intelligent task automation

Python · LangChain · Generative AI · LLMs · Prompt Engineering · ETL · Data Pipelines

Senior Software Engineer & Consultant

Oct 2022 – Jul 2024

Confiz Ltd. — Client: Walmart · Islamabad, Pakistan · Remote

Contributed to microservices architecture design decoupling workorders, items & products, tracking, and third-party integrations across Walmart's store network
Built a software tracking system in Java, Spring Boot, Hibernate, and MySQL monitoring update rollout status across 5,000+ U.S. Walmart stores
Collaborated with U.S. teams to migrate pharmacy software to a cloud solution using Spring Boot, React.js, and AWS CI/CD pipelines
Managed Kubernetes and Jenkins CI/CD pipelines ensuring high availability across 5,000+ stores
Integrated Apache Kafka for real-time event messaging across distributed store systems
Implemented Splunk dashboards and alerting for operational monitoring
Improved release quality using SonarQube, Snyk, JUnit, and Mockito

Java · Spring Boot · Hibernate · MySQL · RESTful APIs · Kubernetes · Kafka · Splunk · SonarQube · Snyk · JUnit · Mockito · React.js · AWS CI/CD

Software Developer

Apr 2021 – Sep 2022

Funavry Technologies · Islamabad, Pakistan

Built RESTful APIs in Java, Spring Boot, and Hibernate integrating DTAC Thailand's ERP with Coupa — reduced integration effort by 40%
Designed RESTful API architecture for a social media job portal using Nest.js and TypeScript — cut delivery time by 45%
Led backend team building the job portal using Spring Boot and React.js; implemented Stripe payment system with escrow
Maintained 99.99% uptime through on-call hyper-care support within SLAs
Streamlined Jenkins CI/CD pipelines to reduce deployment failures and speed up release cycles

Java · Spring Boot · Hibernate · MySQL · Nest.js · TypeScript · React.js · Stripe · Apache Kafka · Jenkins · AWS

Design Engineer

Sep 2019 – Mar 2021

Care Pvt. Ltd. · Islamabad, Pakistan

Built custom Joget Workflow plugins in Java and Spring Boot for a client in the aviation defense sector — delivered GANTT chart system tracking full operational workflow lifecycle, plus data list views and graph visualizations
Extended Joget's GRID element with row-level action handling using Java, enabling direct in-grid data manipulation
Built biometric authentication system with end-to-end encryption: C++ DLLs integrated into Java via JNI, SourceAFIS fingerprint matching, device-agnostic deployment
Developed Windows background authentication service using Spring Boot with Windows Biometric Framework, packaged with Advanced Installer

Java · C++ · Spring Boot · Windows Biometric Framework · JNI · Advanced Installer

Software Engineering Intern

Jul 2019 – Aug 2019

Bentley Systems · Islamabad, Pakistan

Contributed to a company-wide initiative to synchronize local applications with proprietary cloud solutions — researched integration techniques and developed proof of concept

NodeJS · TypeScript

Education

2024 – 2026

Master of Science, Computer Science

Maharishi International University · Fairfield, IA

2015 – 2019

Bachelor of Science, Computer Sciences

SEECS, NUST · Islamabad, Pakistan

Toolchain

The languages, infrastructure, and practices behind the systems.

Languages

Java
TypeScript
Python
C++
C#/.NET

Frameworks & Libraries

Spring Boot
Hibernate
Reactor
Nest.js
React.js
LangChain
Apache Kafka

Databases

MongoDB
MySQL
PostgreSQL
Amazon RDS

Cloud & Infrastructure

AWS
Azure
AWS Kinesis
AWS SQS
Azure Event Hub
Kubernetes
Docker
Jenkins
New Relic
Splunk
SonarQube

Tools & Practices

JUnit
Mockito
Maven
Git
Postman
Liquibase
JIRA
Microservices
Event-Driven Architecture
Reactive Pipelines
DLQ Patterns
Idempotency
MCP
GitHub Copilot
Claude Code

Selected Work

Production systems and personal builds, from delivery-event pipelines to weekend full-stack projects.

Streaming Service — 7-Eleven DaaS

Resolve Tech Solutions (Client: 7-Eleven)

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.

Java · AWS Kinesis · AWS SQS · MongoDB · New Relic · AWS Secrets Manager

GPH Carbon — Walmart Pharmacy

Confiz Ltd. (Client: Walmart)

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.

Java · Spring Boot · React.js · AWS CI/CD · Kubernetes · Jenkins

MarketPlace Pro

Personal Project

Full-stack e-commerce platform with user roles, product management, order tracking, JWT auth, payment integration, and S3 file uploads. Deployed on AWS.

Java · Spring Boot · React · PostgreSQL · AWS

Event Management System

Personal Project

Full-stack event platform with ticket booking, payment integration, JMS messaging, and pessimistic locking to handle concurrent bookings. Deployed on AWS.

Java · Spring Boot · React · PostgreSQL · MySQL · AWS

Expense Tracker

Personal Project

Full-stack expense tracker with add/edit/delete/filter functionality, category breakdowns, and clean REST APIs.

Spring Boot · React · PostgreSQL

Dictionary App

Personal Project

Word search and definitions app with top-searched word tracking optimized for query performance with indexed lookups.

Spring Boot · React · SQLite

05 · Contact

Building something at scale? Let's talk.

I'm open to senior backend and distributed-systems roles, and to interesting consulting work. If you're moving serious traffic and think I'd be a fit, reach out.

awaiswaheed.work@gmail.com

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