Sultan Kautsar Get a quote

Where engineering meets marketing.

I build and maintain digital products, websites, marketing systems, and technical infrastructure for businesses and independent projects.

Selected Work

Case studies are anonymized: no client names, accounts, or figures from client data.

  1. A Headless Website for a Label Printing Brand Products and articles published without a deploy
  2. Privacy-First Tracking for a German Dental Practice No health data sent to Google, bookings measured
  3. An In-House Recruitment Platform for a Packaging Manufacturer The company's main hiring platform, built in-house
  4. A Mobile Sales Inbox for a Packaging Manufacturer Five chat channels in one inbox on every phone
  5. Consent and Conversion Tracking for a Moving Company Consent to conversion, end to end, in 2 days
  6. Repairing the Tracking Chain for a Yoga School 8+ issues fixed in 2 days, every conversion verified
  7. Tracking Standards for a Performance Marketing Agency One event standard across every data flow

Focus

My work usually sits between engineering and marketing, covering development, analytics, tracking, automation, infrastructure, and the systems that connect them together.

I've worked on more than 75 websites across development, maintenance, migration, technical SEO, infrastructure, landing pages, and ongoing production support.

I also work extensively with marketing technology, including analytics implementation, Google Tag Manager, conversion tracking, consent management, and measurement architecture for agencies and businesses in international markets.

My approach is technology-agnostic. I choose the tools and architecture based on the requirements, constraints, and outcome of each project.

Experience

  1. Feb 2026 – Present

    Marketing Technology Engineer at MediaConversion

    Hamburg, Germany · Remote

    Building high-performance tracking infrastructure for European businesses, custom data layer engineering, GA4/Google Ads integration, and GDPR-compliant setups (Consent Mode V2).

  2. Sep 2025 – Present

    Software Engineer at FlexyPack

    Jakarta, Indonesia · Onsite

    Developing internal Odoo systems, mobile sales applications, and career platforms for an e-commerce packaging company.

  3. Mar 2020 – Present

    Founder & Engineer at Rayatiga

    Self-employed · Remote

    Served 350+ clients with website creation, maintenance, migration, Google Tag Manager, and SEO services. Every package includes free maintenance.

  4. May 2023 – Sep 2025

    WordPress & Web Developer at Breef Studio

    Jakarta, Indonesia · Onsite

    Maintained website performance, provided technical support, and built custom sites from UI/UX designs alongside designers and marketing teams.

  5. Feb 2022 – Jul 2022

    Cloud Operations Engineer at Bangkit Academy (Google, Tokopedia, Gojek, Traveloka)

    Jakarta, Indonesia · Remote

    Built Android backends and managed Google Cloud resources (Vertex AI, App Engine, Cloud SQL). Graduated with distinction.

Next step

Have a project in mind? Let's talk.

Tell me what you have and what you need. I'll usually reply within one working day with how I'd approach it.