Preston Williams
@prestonwilliams
Senior Full-Stack Engineer specializing in scalable web apps, cloud infrastructure, and AI integrations.
What I'm looking for
I am a highly accomplished Senior Full-Stack Engineer with over 11 years building scalable, performant, and secure web applications. I specialize in Ruby on Rails and modern JavaScript frameworks including React/Next.js, Angular, and Vue.js.
At my current role I led the development of a microservices-based architecture that improved scalability and reduced response times by 42%. I implemented interactive React/Redux dashboards that increased user engagement by 35% and optimized PostgreSQL queries to cut latency by 50%. I also integrated OpenAI APIs to automate workflows and reduce manual support tasks by 60%.
I champion automated testing and CI/CD, spearheading RSpec, Jest, and Cypress suites to reach 95% coverage, and migrating services to AWS Fargate to cut infrastructure costs by 28%. I built CI/CD pipelines with GitHub Actions and Terraform to accelerate deployments threefold and regularly lead cross-functional Agile teams to improve sprint velocity.
I am passionate about clean code, cross-functional collaboration, and applying AI to drive product and operational efficiency. I seek to contribute technical leadership, scalable architectures, and continuous improvement to high-impact engineering teams.
Experience
Work history, roles, and key accomplishments
Senior Full Stack Engineer
Snapsheet, Inc
Jul 2022 - Present (3 years 2 months)
Led development of a microservices-based architecture with Ruby on Rails and Next.js, improving scalability and reducing response times by 42% under load. Implemented React dashboards, optimized PostgreSQL (50% latency reduction), integrated OpenAI APIs to cut manual support tasks by 60%, and built CI/CD pipelines that tripled deployment frequency.
Senior Full Stack Engineer
PWS, LLC
Feb 2019 - May 2022 (3 years 3 months)
Modernized legacy backends with Ruby on Rails and Node.js, reducing technical debt by 40% and enabling faster feature rollouts. Re-architected MySQL to improve complex data retrieval by 70%, collaborated on an AI-based fraud detection system increasing anomaly accuracy by 88%, and launched AWS infrastructure ensuring 99.9% uptime.
Full Stack Engineer
The BHW Group
Jul 2016 - Dec 2018 (2 years 5 months)
Built Ruby on Rails RESTful APIs serving over 10,000 concurrent users and developed Angular frontends that reduced customer onboarding time by 38%. Streamlined backend processing with Redis and Sidekiq to increase background job throughput by 200% and improved incident resolution via AWS monitoring.
Software Engineer
Plego Technologies
Nov 2014 - May 2016 (1 year 6 months)
Contributed backend features in Ruby on Rails and Node.js, reducing feature delivery time by 30% and increased test coverage from 40% to 75%. Migrated legacy jQuery frontend toward React, improving maintainability by 40%, and optimized PostgreSQL queries to speed report generation by 25%.
Education
Degrees, certifications, and relevant coursework
University of Oxford
Bachelor of Science, Computer Science
Completed a Bachelor of Science in Computer Science at the University of Oxford, graduating May 2014.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
Skills
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