I went all the way from a self-taught freelancer making websites on Joomla CMS to the CTO of a fairly large affiliate marketing company. Here are a few examples to give you an idea of what I've been doing during this time:

2018:
- Android apps for media buying (arbitrage) targeting Facebook with various integrations (Facebook SDK for Android, AppsFlyer, Firebase, OneSignal) for redirects and displaying specific content to target and non-target audiences, with ad campaign conversion optimization and push notifications;
- Telegram bots for sending notifications when an app gets banned;
- landing page and PWA generator (the media buyer adds a pixel, text, and graphics) with a built-in cloaker and FTP deployment to shared hosting;

2019:
- Solo after the team: arbitrage Android apps for rent or sale across various teams and verticals. Yes, I know how to build WebView apps without losing parameters in FB deep links (without naming, AppsFlyer, and other nonsense) - and I was doing it back in 2019. Heavily patched Cordova for fast builds with an integrated custom cloaking solution (app + backend). The backend handled incoming postbacks from renters (from trackers or affiliate networks), then forwarded postbacks (reg/dep) to FB for conversion optimization and to OneSignal for user segmentation and push targeting. Included a custom dashboard for traffic stats. Apps were built on VPS instances (create, build, terminate). Wrote bash scripts to automate environment setup - from OpenJDK to Node.js and Cordova. Built on Google Cloud free tier via SSH over VPN :) Accounts were farmed on 3G modems with an unstable connection and terrible speed 🙈. Greasemonkey userscripts were written for farming to warm up initial cookies.

2020-2021:
- political campaigns, NDA, a lot of anonymity. Tor, double VPNs, remote desktops on VPS with VNC access via a browser(noVNC), etc.
- iGaming, FB ads via lead generation forms, integration with Zapier, which sent form data to my backend, where an offer link was generated and, via Twilio integration, an SMS was sent to the user with a tracking link.

2022-2023:
- Keitaro + Affise to add a new media buyer and share campaigns with them in Keitaro (to avoid mistakes made by a junior techie).
- Keitaro + Affise - an admin panel for media buyers to directly grab links with parameters for launching campaigns via rented mobile apps and PWAs (so junior media buyers wouldn't mess up tracking parameters in deeplinks and URLs).
- Keitaro + Dolphin{cloud} + FBTool + Windsor.ai (Meta Ads Connector) = a performance dashboard of media buyers for the team lead.

2023-2024:
- Namecheap + Cloudflare + Web hosting. In Namecheap, I link domains via NS records to Cloudflare, where I set up DNS records that point the domain to the server. Then, using PHP cURL via proxy, I deploy websites and PWAs via FTP on VPS servers (VPS or Shared Web Hosting). Naturally, this was all done programmatically. Ultimately, the entire procedure, from buying a domain to getting a tracking link to launch ads, would be done with a single click.
- an admin panel for account farmers (and separately for techies) with farming algorithms and credentials for farmed accounts.