Leonardt Lauenstein
Happy at Prezi · Open to email engineering conversations

Email engineer
automating the lifecycle
pipeline with AI.

I'm Leonardt — email engineer with a design background. At Prezi, my AI pipeline (Claude → Cursor → Braze) cut campaign production from hours to under 15 minutes. Previously growth campaigns at Pier — +5M ad impressions in 7 days.

Based in Portugal
Work auth EU + Brazil
Languages PT · EN · DE
Experience 7 years

Stack

01 — Tools
Email & in-app engineering
HTML / CSS (hand-coded) JavaScript Liquid Braze (CRM) In-app messaging Litmus Cross-client QA (Gmail · Outlook · Apple Mail) Accessibility Dark mode Mobile-first rendering VML for Outlook Dynamic content blocks
Optimization & analytics
A/B testing Hex CTR / open-rate analysis Conversion modeling
AI & automation
Claude Cursor Node.js JSON pipelines Figma → Braze automation Prompt engineering
Design & web
Figma Adobe Creative Cloud React TypeScript Next.js Notion

Selected work

02 — Three cases
brief
  ↓
Claude → content
  ↓
Cursor → template
  ↓
Braze → campaign
2024 — nowPreziAI automation

Automating the lifecycle messaging pipeline with AI

Designed and built an end-to-end AI pipeline for lifecycle messaging production. Claude generates the content from the brief; Cursor assembles the responsive templates — emails in HTML/CSS + Liquid, in-app messages in HTML/CSS + JavaScript; Braze executes the campaign across both email and in-app messaging. The handoff between steps is structured JSON, which makes the whole flow versionable and reviewable instead of hand-authored every time. The same pipeline feeds the A/B variants — subject-line and CTA tests running at 3M+ sends per arm, analysed in Hex.

<15 min per campaign — down from 3–8 hours
ClaudeCursorNodeJSONBrazeLiquidJavaScriptIn-app messaging
Pier x Tinder Carnival landing page — animated walkthrough
2023PierGrowth marketing

Pier × Tinder — Carnival campaign

Co-marketing campaign between Pier (digital insurance) and Tinder for Brazilian Carnival 2023. I led the visual system across the landing page, the Tinder swipe-card ad creative, and the full ad rollout — bridging design and front-end build on a tight co-marketing timeline.

+5M ad impressions in 7 days
Landing pageAd creativeBrandCo-marketing
Pier Auto coverage AI-generated ads
2023PierAI + growth

AI-generated ad creatives — when AI was new

In early 2023 I started shipping production ad creatives using AI image generation, embedded inside Pier's brand system. Auto-coverage and smartphone-insurance campaigns that reached over a million impressions in a week — proof that I've been integrating generative AI into real marketing output well before it was the trend.

+1M impressions in 7 days · per campaign
AI image generationAd creativePerformance

Experience

03 — Path
Jun 2024 — now
Email Front-End Developer
Prezi — Remote, Portugal · Building, testing & automating lifecycle email and in-app messaging with AI
Dec 2023 — Jun 2024
Web Designer
Hakkoda — Remote, Portugal · Front-end & graphical solutions for growth
2021 — 2023
Front-end · Designer
Pier — Remote, Brazil · Growth campaigns, landing pages & ad creatives
2020 — present
Web Developer · Freelance
Brazil · Portugal · Germany
2015 — 2020
Artist Assistant
Luiz Zerbini, Luiz Roque, Rodrigo Torres, Daniel Albuquerque & others — Rio de Janeiro
2020
Full-stack Coding Bootcamp
Le Wagon — Lisbon
2007 — 2010
BA in Industrial Design
UniverCidade — Rio de Janeiro, Brazil

Contact

04 — Say hi

Need an email engineer who codes, tests, and automates the whole pipeline? Let's talk.