Teddy Papadopoulos

Senior Full Stack Engineer with 15+ years of Frontend and 6+ years of Backend experience building scalable, high-performance web applications. Strong background in React, TypeScript, and cloud-native architectures on AWS and Google Cloud. Recently focused on AI-driven products, integrating LLMs into production systems with an emphasis on cost optimization, reliability, and end-to-end ownership.

Available for full-time or contract positions.

Skills

Frontend: React 19, TypeScript, JavaScript, Next.js 15, HTML5, CSS3 (Tailwind)

Backend & Data: Node.js, Express, C#, Redis, GraphQL, Python, T-SQL

Cloud & DevOps: AWS (ECS, S3, CloudFront), Docker, Git, Google Cloud Run, CI/CD Pipelines (Github Actions)

AI & APIs: Google Gemini, OpenAI, Prompt Engineering, Amazon Affiliate API

Tools: Google Gemini API, OpenAI API, Prompt Engineering, Jira

Download Resume Contact Me

Key Projects

Personal Projects (2025 - Present)

Personal projects I've been working on.

View Details

RoboGifter.com

AI-powered e-commerce recommendation engine built with Next.js and Node.js.

InMoment Projects (2019 - 2025)

InMoment is a customer experience (CX) company helping businesses collect, analyze, and act on customer and employee feedback through tools such as web-based intercept surveys. My primary role was creating customized intercepts and surveys (Javascript, React, HTML/CSS) for 150+ enterprise clients, leading to a 20% average increase in user engagement. I also built reporting dashboards, internal tools and code libraries, and authored documentation and training manuals. Here is a sample of some of the intercepts and surveys I built.

View Details

Feedback Tab

A feedback tab intercept for a major healthcare provider.

View Details

Banner Intercept

A banner and feedback tab for a major international airport.

View Details

Embedded Survey

An embedded survey on a shoe retailer's confirmation page.

View Details

Page Exit Intercept

A modal intercept for a shoe retailer that triggers when the visitor tries to leave the page.

View Details

Timed Intercept

A custom modal for an energy company that shows after a certain amount of time has passed.

Optimost Projects (2010 - 2019)

Optimost was a leading tool for A/B and multivariate testing. I led end-to-end implementation of A/B and multivariate testing (Javascript, HTML/CSS) solutions for 200+ enterprise clients, resulting in an average conversion rate increase of 4%. I also built coding libraries, trained team members, and redisigned the internal Optimost dashboard. Here is a sample of some of the A/B experiments I built.

View Details

Select Rental Car Page

Optimized the car selection page for a major car rental agency.

View Details

Car Rental Packages Page

Optimized extra packages page for a major car rental agency.

View Details

Payment Page

Optimized payment page for a major car rental agency.

View Details

Mobile Rail Journey

Optimized the Journey planner page for a major railway company.

View Details

Optimost Dashboard Redesign

Redesign of the internal Optimost reporting dashboard.

Experience

Lion Pixel | Founder & Lead Engineer

2025 – Present

Architected AI service layers and serverless infrastructure on Google Cloud Run. Launched RoboGifter with microservices architecture.

InMoment | Software Engineer II

2019 – 2025

Built dynamic web and mobile intercepts (modals, banners, embeds) for 150+ enterprise clients using HTML, CSS, Javascript and React. Designed real-time reporting dashboards with GraphQL and AWS ECS.

Optimost (OpenText) | Senior Technical Consultant

2010 – 2019

Designed and deployed A/B and multivariate experiments for 200+ clients, driving an average conversion lift of 4%. Led front-end redesign of the Optimost dashboard. Mentored a global team of technical consultants and optimized high-traffic conversion funnels.