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Tony Sauvageau

Senior Full-Stack Engineer | React, TypeScript, Next.js

Senior Full-Stack Engineer with 20+ years of experience building scalable applications at Aumni (acquired by J.P. Morgan) and startups. Expert in React, TypeScript, and Next.js with proven track record of leading teams, optimizing performance, and delivering high-quality software through comprehensive testing. Passionate about mentoring developers and establishing engineering best practices.

Get in Touch

Work Experience

J.P. Morgan (via Aumni)

Software Engineer III

09/2021 — Present
  • Built and maintained Ruby on Rails API endpoints to support new product features.
  • Migrated frontend from React on Rails to Next.js, reducing build times by 35% and accelerating feature delivery.
  • Built reusable React components to improve consistency and developer velocity.
  • Defined testing standards, including unit and E2E coverage, improving overall reliability.
  • Collaborated closely with product and design teams to translate requirements into actionable solutions.

Convina

Senior Software Engineer

01/2018 — 09/2021
  • Developed web applications with PHP backends and some Node.js services.
  • Partnered directly with stakeholders to define product requirements, plan roadmaps, and prioritize features.
  • Built reusable frontend components with React and integrated them with backend APIs.
  • Mentored engineers and reviewed architecture and code for maintainability and scalability.
  • Provided technical guidance to ensure product decisions were feasible and aligned with long-term goals.

BWP Communications

Software Engineer

06/2016 — 01/2018
  • Developed web and mobile apps using React and React Native.
  • Built custom WordPress plugins and APIs to meet client needs.
  • Collaborated with designers to deliver accessible, responsive, and polished UIs.

Freelance / Contract Developer

Application Architect

04/2008 — Present
  • Delivered 25+ full-stack projects across SaaS, e-commerce, and mobile platforms.
  • Built modular systems using Next.js, Tailwind, and Supabase for database and storage, deployed on Vercel.
  • Designed UI/UX prototypes to improve usability and adoption.
  • Built RESTful API endpoints and React Server Components to support scalable, maintainable features.
  • Mentored distributed teams and led technical planning sessions.

Featured Projects

Align Nutrition

Align Nutrition

Multi-tenant all-in-one business solution for personal trainers with branded mobile app included. Complete platform with web apps and mobile apps deployed to the app store.

Next.js 15 Supabase +6
AI Date Planner

AI Date Planner

AI-powered date night planner with personalized suggestions using OpenAI GPT-4o. Features questionnaire flow, chat-based recommendations, user authentication, and location autocomplete.

Next.js 15 OpenAI API +3
Santorinis Greek Grill

Santorinis Greek Grill

A React Native mobile app for a local Greek restaurant, featuring a dynamic menu, catering information, and smooth animations built with NativeWind and Expo.

React Native Expo +3

Interactive Tutorials

Latest Articles

Building Paveway: A 90-Day AI Product Experiment

Building Paveway: A 90-Day AI Product Experiment

Day 1 of 90: Starting a 90-day journey to build an AI-powered career development platform from scratch. Exploring responsible AI design, safety considerations, and human-AI interaction while documenting every decision and learning in public.

AI Product Development Career Development +4
5 Essential React 19 Tips for Junior Developers

5 Essential React 19 Tips for Junior Developers

Master the fundamentals of React 19 with these 5 essential tips designed specifically for junior developers and entry-level engineers. Build a solid foundation for your React journey.

React Frontend Beginner +3
5 Habits That Separate Great Frontend Developers from the Rest

5 Habits That Separate Great Frontend Developers from the Rest

Discover the essential habits that transform good frontend developers into exceptional ones. From code organization to performance thinking, learn the practices that will elevate your frontend development game.

Frontend Development Software Development Web Development +3

About Me

Hey! I'm Tony, a senior frontend engineer who's been building web stuff for over 20 years. I love React, TypeScript, and making apps that actually work well. At Aumni (acquired by J.P. Morgan), I helped modernize their frontend stack and mentored the team. These days I'm building AI-powered apps and mobile experiences. I'm all about clean code, good performance, and helping teams ship better products. Let's build something awesome together!

Tony Sauvageau

Mentorship

Level Up Your Engineering Career

Join an exclusive mentorship program with limited spots available. Get personalized guidance from a senior engineer who's been in the trenches for 20+ years. Whether you're transitioning to React/TypeScript, optimizing performance, or advancing your career, I'll help you accelerate your growth and avoid common pitfalls.

What You'll Get

  • Code Review Sessions: 60-minute focused sessions for specific technical challenges ($150/session)
  • Career Growth Program: Structured monthly guidance for career advancement ($500/month)
  • Premium Growth Program: Intensive monthly guidance with more sessions ($800/month)
  • Private Community: Invite-only Discord and Slack channels for ongoing support
  • 24/7 Support: Quick response times and friendly, helpful approach

Perfect For

  • Engineers transitioning to React/TypeScript
  • Developers looking to optimize performance
  • Professionals seeking career advancement
  • Anyone wanting to join a supportive engineering community

Why Engineers Choose My Mentorship

20+
Years of Experience
24h
Response Time
Friendly Approach

Private Community Access

Invite-only Discord and Slack channels for ongoing support

Discord
Slack

Join the Waitlist

Limited spots available - join the waitlist for exclusive mentorship

Join Waitlist

Let's Build Something Awesome

Ready to start your next project? Fill out the form below and I'll get back to you within 24 hours.