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Preston Williams

@prestonwilliams

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Senior Full-Stack Engineer specializing in scalable web apps, cloud infrastructure, and AI integrations.

United States

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What I'm looking for

I'm seeking a Senior engineering role at an engineering-driven company where I can build scalable systems, lead cross-functional teams, and integrate AI to drive measurable product and operational impact.

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

Current

Senior Full Stack Engineer

Current

Snapsheet, Inc

Jul 2022 - Present (3 years 11 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.

Ruby on Rails Next.js React PostgreSQL AWS Fargate RSpec GitHub Actions)GitHub Actions

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.

Ruby on Rails Node Vue.Js MySQL AWS EC2 RDS CircleCi

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.

Ruby on Rails Angular Redis Sidekiq PostgreSQL AWS EC2 RSpec Jenkins

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%.

Ruby on Rails Node React jQuery PostgreSQL Jenkins AWS EC2 Unit Testing