AeroLeads people directory · profile
John Sylvain Email & Phone Number
Lead Software Engineer
at
Outfit Labs
1 work email found
@rocketmiles.com
LinkedIn matched
✓ Verified July 2026
4 data sources
Profile completeness 100%
Current company
Role
Lead Software Engineer
Location
Chicago, Illinois, United States
Company size
Who is John Sylvain? Overview
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Quick answer
John Sylvain is listed as Lead Software Engineer at Outfit Labs, a with 11 employees, based in Chicago, Illinois, United States. AeroLeads shows a work email signal at rocketmiles.com and a matched LinkedIn profile for John Sylvain.
John Sylvain previously worked as Founder at Private Domain Llc and Senior Software Engineer at Chaching. John Sylvain holds B.S. Computer Graphics Technology, Web Development from Purdue University.
Company email context
Email format at Outfit Labs
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{first_initial}{last}@rocketmiles.com
86% confidence
AeroLeads found 1 current-domain work email signal for John Sylvain. Compare company email patterns before reaching out.
Profile bio
About John Sylvain
I am a software engineer focused on creating performant JavaScript web applications and developer tools. I have a keen understanding of modern application architecture as well as multiple frameworks/libraries including React, Angular, and Node.js.Talk to me about TypeScript, GraphQL, and static site generation.View my portfolio at https://johnsylvain.me
Listed skills include Javascript, React.Js, Typescript, Web Development, and 36 others.
Current workplace
John Sylvain's current company
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Outfit Labs
11 roles
John Sylvain work experience
A career timeline built from the work history available for this profile.
Role listed
Lead Software Engineer
Founder
Private Domain Llc
Senior Software Engineer
Oct 2023 - Aug 2024
Senior Software Engineer
Oct 2021 - Oct 2023
Senior Software Engineer
- Joined as the 10th employee and implemented application architectures from scratch with React, TypeScript, Next.js, GraphQL, Apollo, GitHub actions, and Docker, allowing the team to successfully launch the product.- Led the development of a recommendation engine built with Airflow, Python, and MySQL.- Directed the engineering efforts for a cross functional team focused on building brand awareness. Resulting in boosting site performance by 4x, and the development of an automated SEO backlink generation system.
Jul 2020 - Oct 2021
Senior Software Engineer
- Engineered a queue-based payment and reservation process that services thousands of hotel bookings and payments per day, also resulting in an 80% decrease in time to integrate payments.- Implemented a reusable frontend infrastructure with Terraform and Jenkins, allowing for QA and PR environment pipelines to be created in minutes instead of weeks.
Mar 2020 - Jul 2020
Software Engineer
- Led the process of migrating legacy AngularJS applications to React and TypeScript by developing migration plans and new application architectures.- Developed several internal tools including a cross-product development CLI and shared linting and development configurations.- Owned the construction and maintenance of an internal, cross-product UI component library built with React, TypeScript, and Styled Components.- Championed the adoption of front-end methodologies, including BEM, progressive enhancement, and mobile first development.- Architected, implemented, and deployed profitable features for the company’s flagship white-label product.- Worked closely with the design and UX team to create A/B tests, leading to increased conversions and user insight.
Oct 2017 - Mar 2020
Software Developer
- Developed an enterprise-wide RESTful web application to better organize and access internal business rules, allowing all Service Representatives to better serve USAA members.- Generated detailed documentation for future developers.- Worked in an agile development environment, creating user centric software.
May 2016 - Aug 2016
Web Developer
Jun 2015 - Aug 2015
1 education record
John Sylvain education
-
Purdue University
FAQ
Frequently asked questions about John Sylvain
Quick answers generated from the profile data available on this page.
What company does John Sylvain work for?
John Sylvain works for Outfit Labs.
What is John Sylvain's role at Outfit Labs?
John Sylvain is listed as Lead Software Engineer at Outfit Labs.
What is John Sylvain's email address?
AeroLeads has found 1 work email signal at @rocketmiles.com for John Sylvain at Outfit Labs.
Where is John Sylvain based?
John Sylvain is based in Chicago, Illinois, United States while working with Outfit Labs.
What companies has John Sylvain worked for?
John Sylvain has worked for Outfit Labs, Private Domain Llc, Chaching, Vintro, and The Coda Collection.
How can I contact John Sylvain?
You can use AeroLeads to view verified contact signals for John Sylvain at Outfit Labs, including work email, phone, and LinkedIn data when available.
What schools did John Sylvain attend?
John Sylvain holds B.S. Computer Graphics Technology, Web Development from Purdue University.
What skills is John Sylvain known for?
John Sylvain is listed with skills including Javascript, React.Js, Typescript, Web Development, Responsive Web Design, Database Design, Web Applications, and Shell Scripting.
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