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@carlosfelix
Senior full-stack software engineer and team lead focused on front-end excellence.
United StatesI am a Senior Full Stack Software Engineer and Team Lead with deep expertise in front-end web technologies and a strong track record in AdTech. Over a decade, I have led teams, built client-side ID systems, refactored critical ad tags, and contributed to open-source projects like prebid.js to improve performance and monetization.
At 33Across I drove initiatives across the development lifecycle, implemented a probabilistic user identifier for cookieless environments, developed client-side APIs for user IDs, and enhanced platform services including OpenRTB validation, GEO detection, blocklists, and privacy compliance (GDPR, CCPA, GPP, DAA).
I emphasize Test-Driven Development, code simplicity, and cross-team collaboration. I bring hands-on experience with modern JavaScript, TypeScript, Node.js, Golang, Docker, SQL databases, CI/CD, and observability tools, and I focus on delivering reliable, high-performing production systems that increase revenue and reduce technical debt.
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Work history, roles, and key accomplishments
33Across
Jan 2015 - Sep 2025 (10 years 8 months)
Led development of cookieless user addressability and client-side ID APIs, built the company prebid.js ID system, and refactored the ad tag to improve performance and revenue for header bidding.
Ooyala
Jan 2014 - Jan 2015 (1 year)
Led a value engineering team to build VPAID/VAST video prototypes and demos used by sales to win enterprise clients like Univision and beIN Sports.
MIImplemented ad support and UI features for a web container in Skype, using responsive CSS and cross-domain iframe communication to include user data in ad requests.
Get Satisfaction
Jul 2011 - Jul 2012 (1 year)
Developed features for a customer support platform and designed a mobile web app for SSO login, integrating OAuth third-party authentication.
Freshout Agency
Oct 2009 - Jul 2011 (1 year 9 months)
Built dynamic user interfaces and JavaScript-driven solutions for activist-driven web projects, improving engagement and usability.
YIYahoo Inc
Jun 2010 - Nov 2010 (5 months)
Contributed to the Yahoo Mail UI development as part of the team that shipped the 2011 interface update.
STX
Dec 2006 - May 2007 (5 months)
Developed ERP web modules for inventory, sales, finance and accounting to streamline business operations.
Degrees, certifications, and relevant coursework
Computer Software Engineering
2002 - 2006
Completed a degree in Computer Software Engineering with coursework focused on software development and engineering principles from August 2002 to December 2006.
United StatesYou can contact Carlos and 90k+ other talented remote workers on Himalayas.
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