👋Hey, I'mKhaled Awad
Backend software engineer with nearly 7 years of experience building and operating payment systems, distributed services, and cloud infrastructure serving 73M+ users.
PayPay Office, TokyoKhaled Awad
Software Engineer
Building Scalable
Systems at Scale.
I'm a Software Engineer based in Tokyo, Japan with 7+ years of experience building high-scale distributed systems and cloud infrastructure.
Currently at PayPay, I work across User Module and Payout teams, handling services for 73M+ users and processing 600K+ daily payouts.
Education
Bachelor of Science in Computer and Communications Engineering
Faculty of Engineering, Alexandria University
2019 • Egypt
Certifications
AWS Certified Solutions Architect – Associate
Amazon Web Services
AWS Certified Developer – Associate
Amazon Web Services
Featured Story
Life in Japan: My Journey to Tokyo
PayPay InsideOut • Oct 2023
Read my story →Behind the Scenes
Presenting product updates
Team discussions
Collaborating with the team
Deep in code
At PayPay office
Featured Projects & Impact.
Bank Transfer Disaster Recovery
Fintech
Led disaster-recovery architecture and failover design for a new bank-transfer service serving 73M+ users.
Led a sub-team delivering DR architecture, failover design, and readiness testing. Reduced payout processing cost by 3% through architectural improvements.
Merchant Payout Infrastructure
Fintech
Owned payout and settlement-reporting infrastructure serving 3.6M merchants processing JPY 100M+ daily.
Built automated JWK registration and rotation pipelines. Led failover planning for daily payout services supporting 600K+ users.
Built Backstage plugins and developer-portal automation for service scaffolding, onboarding, and deployment workflows.
Streamlined domain ownership updates and cross-team deployment workflows using React, TypeScript, and Node.js.
Enterprise Cloud Migration
Cloud/DevOps
$111M enterprise cloud migration with highly available, scalable multi-region systems using Terraform and CloudFormation.
Side Projects & Experiments
Full-Stack Enterprise Platform
Enterprise
Engineered products supporting 168K users and 225K monthly transactions with 20% performance improvement.
My
Journey &
Career.
"Building systems that scale to millions while maintaining code quality and reliability."
Software Engineer
Leading disaster-recovery architecture and payment infrastructure for Japan's largest mobile payment platform serving 73M+ users.
Bank Transfer & DR
- ▸Led a sub-team (3 engineers) delivering disaster-recovery architecture, failover design, and readiness testing for a new bank-transfer service serving 73M+ users
- ▸Reduced payout processing cost per transaction by 3% through architectural improvements to the bank-transfer workflow
- ▸Led failover planning and recovery procedures for daily payout services supporting 600K+ users
Payout & Settlement
- ▸Owned payout and settlement-reporting infrastructure serving 3.6M merchants processing JPY 100M+ daily
- ▸Built automated JSON Web Key (JWK) registration and rotation pipelines, removing manual key-provisioning steps
- ▸Served as release lead for production deployments, directing staged rollouts and incident escalation
Developer Platform
- ▸Built Backstage plugins and developer-portal automation for service scaffolding and onboarding
- ▸Streamlined domain ownership updates and cross-team deployment workflows
Cloud Engineer
AWS Certified Solution Architect & Developer working on enterprise cloud infrastructure migration and automation.
- ▸Contributed to AWS migration of infrastructure for a $111M enterprise account using Terraform and CloudFormation
- ▸Designed highly available, scalable multi-region systems
- ▸Developed 20+ Python and Bash automation tools for EC2, ECS, EKS instance management
- ▸Built Kubernetes cluster provisioning, security policy configuration, and monitoring setups
Graduate Research Assistant
Research on blockchain solutions for secure historical text storage.
- ▸Developed blockchain-based solution for storing Islamic Hadiths with multiple institutions as validators
- ▸Published paper in the 'Computers' journal of the MDPI publishing group
Software Engineer
Full-stack development on high-impact government and enterprise projects.
- ▸Engineered products supporting 168K registered users and 225K monthly transactions using Ruby on Rails, React, and PostgreSQL
- ▸Improved application performance by 20% and reduced production error rates by 70% using observability tools
Academic Publications & Research.
Let's Build
Something Amazing.
I'm always interested in hearing about new opportunities, challenging projects, or just having a chat about technology.