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I am Thomas Westhoefer, a Senior Full-Stack Engineer with 13+ years of experience building and scaling multi-tenant SaaS platforms and high-concurrency web apps. I specialize in TypeScript-first development with React, Next.js, React Native, and Node.js, delivering performant frontend systems and production-grade microservices. I also design robust backend services with Python (FastAPI, Django), optimize MongoDB and PostgreSQL queries, and improve latency and Core Web Vitals. I enjoy deploying reliable distributed systems on AWS and GCP using Docker and Kubernetes, and collaborating with cross-functional teams to ship scalable software.…I am Thomas Westhoefer, a Senior Full-Stack Engineer with 13+ years of experience building and scaling multi-tenant SaaS platforms and high-concurrency web apps. I specialize in TypeScript-first development with React, Next.js, React Native, and Node.js, delivering performant frontend systems and production-grade microservices. I also design robust backend services with Python (FastAPI, Django), optimize MongoDB and PostgreSQL queries, and improve latency and Core Web Vitals. I enjoy deploying reliable distributed systems on AWS and GCP using Docker and Kubernetes, and collaborating with cross-functional teams to ship scalable software.

Thomas Westhoefer

Full Stack Developer, Web Developer, Front-End Developer, +2

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I am Thomas Westhoefer, a Senior Full-Stack Engineer with 13+ years of experience building and scaling multi-tenant SaaS platforms and high-concurrency web apps. I specialize in TypeScript-first development with React, Next.js, React Native, and Node.js, delivering performant frontend systems and production-grade microservices. I also design robust backend services with Python (FastAPI, Django), optimize MongoDB and PostgreSQL queries, and improve latency and Core Web Vitals. I enjoy deploying reliable distributed systems on AWS and GCP using Docker and Kubernetes, and collaborating with cross-functional teams to ship scalable software.…I am Thomas Westhoefer, a Senior Full-Stack Engineer with 13+ years of experience building and scaling multi-tenant SaaS platforms and high-concurrency web apps. I specialize in TypeScript-first development with React, Next.js, React Native, and Node.js, delivering performant frontend systems and production-grade microservices. I also design robust backend services with Python (FastAPI, Django), optimize MongoDB and PostgreSQL queries, and improve latency and Core Web Vitals. I enjoy deploying reliable distributed systems on AWS and GCP using Docker and Kubernetes, and collaborating with cross-functional teams to ship scalable software.

Available to hire

I am Thomas Westhoefer, a Senior Full-Stack Engineer with 13+ years of experience building and scaling multi-tenant SaaS platforms and high-concurrency web apps. I specialize in TypeScript-first development with React, Next.js, React Native, and Node.js, delivering performant frontend systems and production-grade microservices.

I also design robust backend services with Python (FastAPI, Django), optimize MongoDB and PostgreSQL queries, and improve latency and Core Web Vitals. I enjoy deploying reliable distributed systems on AWS and GCP using Docker and Kubernetes, and collaborating with cross-functional teams to ship scalable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

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Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Full-Stack Developer at Sift

April 1, 2021 - Present

Architected and led the frontend redesign of a multi-tenant SaaS platform using React and TypeScript, implementing modular component architecture and Redux Toolkit-based state management to support complex role-based workflows and cross-team feature scalability. Migrated the application from pure client-side rendering to a hybrid SSR/SSG architecture with Next.js, addressing search engine crawlability and improving metadata indexing for dynamic routes, resulting in a 35% increase in organic traffic. Designed server-side data fetching and caching strategies to optimize TTFB and LCP, delivering consistent performance across global users. Partnered with UX designers to redesign onboarding and workflow interfaces, applying usability heuristics and performance optimizations that improved user engagement by 28% and reduced task abandonment.

Senior Full-Stack Engineer at WorkFusion

January 1, 2017 - March 1, 2021

Led development of interactive frontend applications using React and Angular; built reusable UI libraries and design patterns to accelerate feature delivery; optimized high-traffic dashboards through virtualization and memoization, reducing UI latency during peak usage. Designed scalable backend services with Node.js and Express, implementing JWT/OAuth 2.0 RBAC and REST/GraphQL APIs; deployed services to AWS EC2 and GCP Cloud Run; containerized with Docker and orchestrated with Kubernetes. Established a comprehensive testing strategy spanning unit, integration, and end-to-end tests (Jest, Mocha, Cypress) integrated into CI/CD pipelines, improving deployment reliability and reducing post-release defects. Also contributed to Python-based services (FastAPI, Django) deployed on AWS/GCP for asynchronous throughput under high concurrency.

Frontend Developer at Webhead Technologies

May 1, 2011 - November 1, 2015

Developed backend web applications using PHP and MySQL, designing normalized relational database schemas and implementing server-side business logic to support transactional workflows and user management modules. Contributed to frontend implementation using Angular, developing reactive forms, dynamic data-binding interfaces, and reusable UI components integrated with backend services. Built RESTful API endpoints to enable separation between frontend and backend layers, improving system modularity and facilitating future frontend framework migrations. Implemented responsive layouts using Bootstrap and CSS3, ensuring cross-browser compatibility and improved usability across desktop and mobile environments.