Harry William
IT developer
Denver,CO
Summary
Senior Software Engineer with 8+ years of experience delivering highimpact web applications across fintech, e-commerce, and SaaS sectors. Proven success in improving performance by 30-60%, and launching scalable, secure, and user-friendly products. Expertise in full-stack JavaScript development, cloud infrastructure (AWS), and modern frontend frameworks. Wrote clean, well-documented code that reduced bug reports by 30% over 12 months, continuous improvement, and mentoring developers.
Overview
5
5
years of professional experience
1
1
Certification
Work History
Senior Software Engineer
Cisco Company
San Jose, Cal
02.2024 - 01.2025
- Spearheaded the complete rebuild of a B2B SaaS platform using React, Node.js, and PostgreSQL, reducing page load times by 52% and increasing user retention by 18%.
- Designed and deployed scalable microservices using Docker and AWS Lambda, enabling 99.9% uptime and 40% faster deployments.
- Led sprint planning, code reviews, and pair programming sessions to boost team productivity and code quality.
- Integrated CI/CD pipelines, cutting deployment time by 60% and minimizing rollback incidents.
- Reduced client churn by 12% by delivering key UX enhancements based on user feedback and analytics.
- Cut infrastructure costs by 22% through refactoring and optimizing AWS architecture.
Junior Software Engineer
Cyber Infrastructure
Remote
06.2021 - 01.2024
- Developed and maintained 8+ full-stack applications using React.js, Laravel, and RESTful APIs.
- Built reusable UI component libraries, reducing front-end development time by 35% across projects.
- Integrated third-party services (Stripe, Twilio, Firebase), ensuring secure and scalable data flows.
- Mentored 4 junior developers, 2 of whom were promoted within a year.
- Led the redesign of an e-commerce platform, improving conversion rates by 25%.
Software Engineer
Suffescom Solutions Inc
Singapore
08.2019 - 04.2021
- Created responsive websites and custom WordPress themes for 10+ clients.
- Optimized performance and SEO, improving client site rankings and reducing bounce rates by 40%.
Education
B.S. - Computer Science
Columbia University
New York01.2017
Skills
- Reactjs
- Nextjs
- Vuejs
- Angular
- TypeScript
- Tailwind CSS
- Nodejs
- Expressjs
- Django
- PHP
- Laravel
- CI
- REST
- GraphQL
- Docker
- Git
- GitHub Actions
- Jenkins
- AWS
- EC2
- S3
- RDS
- Vercel
- PostgreSQL
- MySQL
- MongoDB
- Redis
- Jest
- Cypress
- Playwright
- Mocha
- Agile
- Scrum
- Jira
- Trello
- CI/CD
- Mentorship
- Code Reviews
Certification
- AWS Certified Developer - Associate (2023)
- Google Mobile Web Specialist
- Certified ScrumMaster (CSM)
Projects
E-Commerce Admin Portal, React, Node.js, PostgreSQL, Built a role-based dashboard with order tracking, analytics, and fast-paced inventory management. Improved admin efficiency by 40%. Real-Time Chat App, Socket.IO, MongoDB, JWT, Launched a secure chat platform with 1,000+ DAUs. Features include live typing, notifications, and offline sync.
Languages
- English, Native
- Chinese, Fluent
Core Competencies
React.js, Next.js, Vue.js, Angular, TypeScript, Tailwind CSS, Node.js, Express.js, Django, PHP (Laravel, CI), REST/GraphQL APIs, Docker, Git, GitHub Actions, Jenkins, AWS (EC2, S3, RDS), Vercel, PostgreSQL, MySQL, MongoDB, Redis, Jest, Cypress, Playwright, Mocha, Agile/Scrum, Jira, Trello, CI/CD, Mentorship, Code Reviews
Accomplishments
- Managed a team of 8employees, ensuring that a $20000-budgeted project was completed by the expected deadline.
- Developed solid working knowledge of engineering, design and architecture as the Lead Software Developer on a team of 8.
- Resolved product issue through consumer testing.
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Work Preference
Work Type
Full TimeWork Location
RemoteImportant To Me
Work-life balanceCompany CultureCareer advancementWork from home optionLanguages
English
Native language
Timeline
Senior Software Engineer
Cisco Company
02.2024 - 01.2025
Junior Software Engineer
Cyber Infrastructure
06.2021 - 01.2024
Software Engineer
Suffescom Solutions Inc
08.2019 - 04.2021
B.S. - Computer Science
Columbia University
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