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Harbhajan Singh
Frederick,MD
Summary
Results-driven Senior Software Engineer with extensive experience in AWS architecture and microservices. Achievements include scaling production capacity from 50k to 100k units weekly and reducing system latency by 30%, delivering high-impact solutions that enhance operational efficiency. Proven ability to mentor engineers while fostering a culture of innovation.
Overview
15
15
years of professional experience
Work History
Senior Software Engineer
Amazon
11.2020 - Current
- Architected and delivered Atom Orders Service and Hardcover Convergence initiatives, transforming stalled multi-year roadmap items into production systems serving 5+ manufacturing cells
- Led cross-functional teams of 6+ engineers across multiple organizations to deliver critical manufacturing systems, scaling hardcover production capacity from 50k to 100k books per week
- Optimized manufacturing system performance by 30%, reducing Finalize latency from 1.2s to 0.87s and eliminating 500,000+ redundant API calls daily
- Built AWS EC2 Instance Connect control plane handling 100k+ daily connections across 32 regions, saving customers $0.5M annually while improving security posture
- Designed distributed systems solutions for complex manufacturing workflows, implementing asynchronous APIs and rate limiting systems that simplified multi-team integration
- Developed innovative testing infrastructure reducing pipeline execution time by 67% (45 to 15 minutes) and improving deployment efficiency by 60%
- Co-created AWS BYOIP Anycast feature, enabling users to publicize IP addresses across regions, which strengthened network stability and improved location-based backups.
- Designed and implemented integration between AWS IP Address Manager (IPAM) and BYOIP service, creating a unified platform for streamlined IP address management across the AWS infrastructure
- Engineered WASM/React-based SSH functionality for AWS EC2 Console, delivering seamless and secure instance access while improving the user experience
Senior Software Engineer
Good Eggs
08.2020 - 11.2020
- Architected and implemented GraphQL resolver layer using NodeJS, enabling efficient data handling and optimizing API performance with improved query resolution
- Implemented Storybook integration for React-Native application, streamlining component development and enhancing UI consistency, resulting in faster development cycles
- Mentored junior engineers on coding best practices and software development methodologies.
Lead Software Engineer
Vistaprint
05.2013 - 08.2020
- Led cross-functional teams in UX enhancement initiatives, improving user engagement metrics by implementing user-centered design principles.
- Architected and implemented a microservices-based translation management system, streamlining workflows and enhancing operational efficiency across teams
- Engineered a robust CI/CD pipeline using Kubernetes and Jenkins, accelerating deployment cycles and reducing time-to-production for critical updates
- Successfully executed a large-scale migration of legacy infrastructure to the AWS cloud platform, ensuring zero downtime and maintaining system performance standards
- Spearheaded mentorship program for novice developers, providing technical guidance and best practices, enhancing team code standards and collaboration.
Software Engineer
Laureate Education
06.2011 - 05.2013
- Developed educational web app to enhance student online experience.
- Created migration system for MongoDB updates to maintain data integrity.
- Developed and maintained code repositories using version control systems effectively.
Education
BS - Computer Engineer
University of Maryland Baltimore County
Baltimore, MD01-2012
Skills
- Microservices architecture
- API design
- Java
- NodeJs
- Kotlin
- Javascript
- TypeScript
- React
- GraphQL
- Spring
- AWS
- Cloud design
- CI/CD development
- CI/CD
- Kubernetes
- Docker
- MongoDB
- DynamoDB
- Postgres
- ElasticSearch
- Redis
- Testing integration
- Agile practices
- Team leadership
- Cross-team collaboration
- AWS design
- API design
Timeline
Senior Software Engineer
Amazon
11.2020 - Current
Senior Software Engineer
Good Eggs
08.2020 - 11.2020
Lead Software Engineer
Vistaprint
05.2013 - 08.2020
Software Engineer
Laureate Education
06.2011 - 05.2013
BS - Computer Engineer
University of Maryland Baltimore County