Open to opportunities

Justin Williams

@justinwilliams1

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Full-stack software engineer building scalable, cloud-native applications and data systems.

United States

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What I'm looking for

I seek senior full-stack roles to design cloud-native, scalable systems, integrate AI/ML and GIS, lead technical initiatives, and mentor teams within a collaborative, growth-focused company.

I am a Full Stack Software Engineer with 8+ years designing and developing high-performance, cloud-native applications using PHP, Node.js, TypeScript, JavaScript, and Python. I specialize in microservices, event-driven systems, robust APIs, AI/ML integration, and modernizing legacy systems to improve scalability and performance.

I have delivered serverless architectures achieving 99.99% uptime and 30% infrastructure cost reductions, optimized PostgreSQL/PostGIS queries to cut latency by 50%, and built ETL pipelines processing millions of records daily. I prioritize observability, automated testing, and collaborative leadership to drive technical excellence and measurable business impact.

Experience

Work history, roles, and key accomplishments

Full Stack Developer

CompStak

Sep 2022 - Jul 2025 (2 years 10 months)

Designed and deployed serverless architectures (Lambda, API Gateway, Step Functions) achieving 99.99% uptime and reducing infrastructure costs by 30%. Optimized PostgreSQL/PostGIS and Elasticsearch performance to cut query latency by 50% and built ETL pipelines processing millions of records daily for analytics.

PHP (Laravel)Symfony Python AWS Lambda API Gateway PostgreSQL Elasticsearch Pyspark Mapbox

Software Engineer

MachineCDN

Sep 2020 - Jun 2022 (1 year 9 months)

Developed high-performance RESTful APIs with Laravel, decreasing server response time by 22% and improving data processing speed by 31%. Implemented RabbitMQ workers and Kubernetes orchestration to improve scalability and deployed fault-tolerant AWS infrastructure to reduce downtime.

PHP (Laravel)PostgreSQL RabbitMQ Kubernetes AWS EC2 Lambda Vue.Js Elasticsearch Redis Datadog

Junior Software Engineer

Humana

Feb 2018 - Jul 2020 (2 years 5 months)

Built reusable React and Vue components and responsive UIs that improved maintainability and accelerated feature delivery. Integrated RESTful APIs, enforced accessibility standards, and reduced load times through image optimization and lazy loading.