I build AI and automation for creativity, business and marketing.

From AI workflows and automations to smart tools, outreach systems and AI content pilots: I turn new technology into something people actually use.

- Lennar

See my workGet in touch

Animation of my monogram :)

I work with

  • Python
  • Swift
  • Claude
  • Claude Code
  • Visual Studio Code
  • Proton Mail
  • GitHub
  • Figma
  • After Effects
  • Premiere Pro
  • Meta
  • Google
  • LinkedIn

AI-driven outreach system

read moreRead more in the terminal below.

  1. # outreach.py
  3. project = "AI-driven outreach system"
  4. stack = [
  5. "Python",
  6. "Claude",
  7. "Visual Studio Code",
  8. "Proton Bridge",
  9. "JSON",
  10. "Excel",
  11. ]
  13. mensen_benaderd = 500 # 500+ people contacted
  15. def antwoord():
  16. return "I take over the conversation"
  18. """
  19. Python-based system that scrapes and qualifies leads, sends personalised
  20. first emails and follow-ups through a Proton Bridge connection and
  21. processes and tracks all data in JSON and Excel. Claude writes and
  22. refines the logic and personalises the outreach copy. As soon as someone
  23. replies, the system hands the conversation over to me automatically.
  24. """
Python code of the outreach system: the email template on the left and the scraper that finds email addresses on websites on the right

Own finance dashboard

A self-built dashboard to keep my finances, both private and business, in one clear place, instead of loose spreadsheets. Runs locally, no cloud: bookings, VAT returns, bank reconciliation and invoices in one place.

Project
An overview of my own business, built myself.
Stack
  • Python
  • SQLite
  • Vanilla JS
  • Eigen data
Status
In use
Source
View on GitHub
The finance dashboard in light mode with the private overview: income, expenses, balance, balances per account, a bar chart per month and spending per category (sample data)

Ads Planner

A tool that reviews ads, sets them up in Meta, learns from the numbers and reports back.

With video ads a lot of knowledge gets lost: which hook worked, which copy belonged to which video, what the last test taught. Ads Planner brings the whole way of working together in one place, per client. A raw video is transcribed and reviewed on hook and cut advice, copy variants and names for the launch pack are generated and everything goes to Meta. The numbers come back, every insight goes into a log per client and the client report comes from that.

  • Python
  • SQLite
  • Meta Ads (API)
  • Whisper
  • Claude Code
  1. Learns per client: every client has their own folder of learnings, and numbers are never mixed between clients.
  2. Honest feedback: the tool says so when a hook is weak or when there are too few results to conclude anything.
  3. One workbench for the whole route: from raw video to client report, in five steps.
The Ads Planner workbench with the steps Concept, Final, Launch, Live and Result, and an ad that is live with results, clicks and cost per result (sample data)
Workbench
Results screen with campaigns, a signal that an ad is a candidate for scaling up budget and the best ads by lowest cost per result (sample data)
Results
Client report as a slide: the key numbers, the best ads by cost per result and three things we learned (sample data)
Client report

Little Works, Mac apps

Small, calm Mac apps for a solo freelancer.

A learning project in Swift and SwiftUI, made for my own use. The first app, tikk., is a menu bar time tracker: one click on a client starts the timer, with a urencriterium bar, an hourly rate per client and Excel export.

  • Swift
  • SwiftUI
  • SwiftData
  • Claude Code

GitHub

The tikk. menu bar app with a list of clients, each with a start button, and the hours for today and this week
tikk. on the iPhone: the settings screen with urencriterium, projects and reminderstikk. on the iPhone: the choice of eight app icons with the robot in different colours

AI content pilots for brands

Pilots with AI-generated content in AI suites like Freepik/Magnific and Fal.ai, for several clients, from concept to generated visuals. With careful prompting and a fixed design system the style stays consistent, even when you scale up.

Prompt

Child wearing glasses, soft daylight, lifestyle, fixed style and brand colours

Tools
  • Freepik/Magnific
  • Fal.ai
  • Prompting
  • Designsysteem
  • Consistentie
Result

Reusable, scalable and quick to test at low cost.

Workflow canvas with AI-generated lifestyle images and product shots of a children's eyewear frame, with the prompts behind them
The workspace, with the prompts behind it

Brand identity and design

Brands whose identity I designed, from logo and colour to the website.

Design system for an advisory firm, in progress

A design system (house style, visual identity, logos, etc.) that I am building for an advisory firm right now. I use this project to teach myself design in Figma, for the most part.

Fluid Marketing, website and brand identity

The marketing agency I run with a friend from university got its brand identity and website from me: logo and wordmark, colours, the whole look and feel and a bilingual one-pager, designed and built myself.

Visit the website ↗
Design system for an advisory firm, brand board
Deliberately blurred brand board from a design system: logos, wordmark and colours
1800 × 1320
Fluid Marketing, brand board
Fluid Marketing brand board: the logo with wordmark, the fm monogram, the wordmark on dark and yellow, and the colours blue, ink, sun and paper
1800 × 1320
Fluid Marketing, website
The Fluid Marketing website: the headline 'Growth you see every week' (Dutch) next to five rising blue bars and a yellow sun
1800 × 825

Marketing

Campaigns, ads and websites, built for growth you can measure.

Lenffect

Sponsored

Crowdfunding and app downloads. Crowdfunding oversubscribed at 110% and downloads boosted.

See more

Through Fluid Marketing I help an app startup grow. Part of that was a crowdfunding round, which ended up oversubscribed at 110%. On top of that, the main goal of every campaign is app downloads. With each campaign we optimise further, so we keep reaching that goal. I also did the visual design for the animation, as part of a rebrand that is in the making.

Google Analytics for the last month: 12k active users (+169%) and 16k sessions (+205%)
ResultCrowdfunding oversubscribed at 110%, 2,000+ downloads and a reach of 250k people in recent months

Lenffect

Sponsored

Ongoing social media campaign management. Daily growth for several brands at once.

See more

I currently manage the campaigns of several clients across different sectors (real estate, a design agency and a healthcare company) on an ongoing basis, and will soon start new engagements.

  • RReal estate
  • DDesign agency
  • HHealthcare
  • +More soon
  • Meta Ads
  • Google Ads
  • LinkedIn Ads
  • Analytics
StatusOngoing

Lenffect

Sponsored

Fluid Marketing, website and brand identity. The website and the complete brand identity of our own agency.

See more

The marketing agency I run with a friend from university got its brand identity and website from me: logo and wordmark, colours, the whole look and feel and a bilingual one-pager, designed and built myself.

fluid-marketing.comThe website and the complete brand identity of our own agency.
  • Huisstijl
  • Figma
  • SVG
  • Claude Code
  • Netlify

Lenffect

Sponsored

Websites. From concept to launch, built myself.

See more

Several websites, apps and dashboards built for my own projects and clients with Claude Code, hosted on Netlify, for example, or another hosting provider, to get from concept to a working result fast.

srmarketing.nlFrom concept to launch, built myself.
  • Claude Code
  • Visual Studio Code
  • Netlify
  • Hosting
Me sitting at a table in a marina
Hi, this is me! (Besides building things, I love sailing. Here I am in a marina in Croatia.)

About me

I'm Lennar, Throughout my studies and short career I've moved between creativity, business and technology. I started in film, VFX and motion design, then studied Commercial Economics and did a master's in Entrepreneurship. These past few years I've combined all of that and use AI for real workflows, for myself as a freelancer and at Fluid Marketing, a small marketing agency run by a friend from university and me. I'm not a specialist in one thing, but I know enough about a lot of things to do them well. For you, that means one point of contact.

Got a minute? Read the full story

I've spent my whole career moving between creativity, business and technology. I started out in film and motion design/VFX, with courses and training in London, South Africa and Berlin, working with programs like Premiere Pro, Lightroom, After Effects and Cinema 4D. It was also there, during my first freelance jobs, that I came into contact with entrepreneurship and the business side of tech rather than the creative side. Because of those first entrepreneurial steps I decided to change course. Through a bachelor's in Commercial Economics in Rotterdam and a master's in Entrepreneurship in Amsterdam (VU/UvA), my interest shifted to the business side of technology: how data and automation make decisions smarter and more efficient.

These threads come together in my own work as a freelancer with Lenffect and Fluid Marketing, where I use AI every day to automate real workflows and to learn, from lead generation to analysing campaigns. I'm not a trained programmer, but I'm always curious, pick up new technology quickly, start building and experimenting right away, and can explain clearly what it does. I prefer to learn by doing: lately I taught myself Figma, for example, and I'm now building my first simple design system.

I get energy from learning new things, experimenting and trying things out right away. I'm always looking for the combination of creativity, data and AI to build things people actually use, and I like working with people who want to put something out there. To be honest, I'm not a specialist in one thing. But I know enough about a lot of things to do them well: marketing, automation, (website) design and photography and videography.

For you, that means one point of contact. I think along, pick it up and keep you posted. People often tell me it's simply nice to work with me, and I do my best to keep it that way.

View my LinkedIn

Marketing

  • Social media
  • Content planning
  • Email marketing
  • Automatic emails and follow-ups
  • AI for content

Websites & tools

  • Websites
  • Web shops
  • Smart tools
  • Automating routine work

Visuals

  • Photography
  • Videography
  • Video editing

Business

  • Strategy
  • Product development
  • Project management

Let's get acquainted

Got an idea, a question, or just want to talk something through? Send me a message. An introduction is always free and without obligation.

lenffect@outlook.comGitHub

Lenffect.See the effect.