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James Xavyr

@jamesxavyr

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Senior Full Stack Engineer specializing in scalable TypeScript, React, Next.js, and cloud-native architectures.

United States

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What I'm looking for

I seek senior engineering roles building scalable, secure cloud-native web platforms, with opportunities to lead architecture, mentor teams, and implement CI/CD and observability practices.

I am a Senior Full Stack Engineer with a decade of experience architecting and scaling enterprise-grade web platforms across industries.

I specialize in the JavaScript/TypeScript ecosystem—React, Next.js, Node.js, and NestJS—with deep expertise in GraphQL and PostgreSQL, building microservices and real-time dashboards that handle millions of transactions with sub-second latency.

I have transformed monoliths into cloud-native architectures, introduced CI/CD pipelines that cut release cycles from weeks to hours, and enforced security-first practices including SOC2 and CJIS compliance.

I mentor engineering teams, standardize practices, and deliver component-driven design systems while also contributing hands-on to infrastructure (AWS, Kubernetes, Terraform), automated testing, and observability to ensure performant, reliable systems.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Grayshift

Oct 2021 - Present (4 years 1 month)

Architected a distributed forensic evidence analysis platform with Node/NestJS microservices and GraphQL Federation, reduced cold-start dashboard loads from 2.8s to 1.1s, and cut query latency by 70% via hybrid partitioning and GIN-indexed JSONB stores.

TypeScript Node NestJS GraphQL PostgreSQL Next.js AWS Kubernetes Terraform

Senior Frontend Developer

Bantam Technologies

Mar 2021 - Oct 2021 (7 months)

Developed a multi-tenant React/Next.js SaaS frontend with Apollo GraphQL and micro-frontend Module Federation, cut time-to-first-paint by 50% and reduced UI development time by 25% via a shared component library.

React Next.js Apollo GraphQL Module Federation Redux Observable Storybook TypeScript Cypress Jest

Senior Frontend Developer

CyberGRX

Dec 2018 - Mar 2021 (2 years 3 months)

Built a scalable React/TypeScript application with Redux Observables and Apollo Client, reduced over-fetching by 60%, decreased bundle size by 45%, and raised frontend test coverage to 85% for critical workflows.

React TypeScript Redux Observable Apollo Client GraphQL Jest Cypress Webpack Performance Optimization

Software Engineer

Gnarbox

Jul 2018 - Dec 2018 (5 months)

Developed cross-platform React Native apps and an offline-first storage engine with SQLite and Redux Persist, and built Node.js WebSocket sync services for real-time media state reconciliation.

React Native Redux SQLite Node WebSockets Next.js Offline First Binary Payload Optimization Integration Testing

Senior Software Engineer

Codesmith

Jan 2018 - Dec 2018 (11 months)

Built a React/Redux/TypeScript boilerplate and extended NestJS controllers for secure authentication and RBAC, authored modular component systems, and drove TDD practices to improve code quality.

React Redux TypeScript NestJS JWT RBAC SASS Webpack Test Driven Development

Web Developer

Cevado Technologies

Jun 2016 - Oct 2017 (1 year 4 months)

Refactored a legacy PHP CMS into modular services with Node.js REST APIs, built a React SPA integrating Zillow/Eppraisal APIs serving 10k+ property reports monthly, and added geospatial visualizations with Mapbox.

PHP Node React REST APIs Mapbox SQL Geospatial analysis Performance Optimization

Full Stack Engineer

Meng Tao Collegiate Consulting

Aug 2014 - Jan 2016 (1 year 5 months)

Built a Ruby/Sinatra TOEFL/SAT testing platform with SQL persistence and authored ingestion scripts to normalize large exam datasets, and delivered React/Node dashboards supporting over 50k exam submissions.

Ruby Sinatra SQL React Node Data Ingestion ETL Dashboarding Server Side Rendering

GIS Server Analyst

Esri

Jan 2014 - Aug 2014 (7 months)

Diagnosed and optimized ArcGIS enterprise deployments, automated monitoring and index optimizations with Node.js/Python scripts, and achieved a 93% customer satisfaction rating through rapid incident resolution.