Job Sofaar Lumban Tobing

Developer Digital Marketing Organic Growth with 15 Years of Experience SEO · GEO · ASO · AIO · CRO · and full-funnel digital optimization

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I've been building on the web for 15 years — starting the day I bought Sofaar.com.

I'm a developer and digital marketer focused on organic growth and full-funnel optimization — from SEO and GEO to ASO, AIO, CRO, paid performance, experience design, and measurement. I own and run 9 and AppDev365, and I build helper projects like USDToy and CodeReff.

I'm also a volunteer in the Open Data Indonesia initiative as a programmer specialist with the Office of the Presidential Staff (Kantor Staf Presiden).

The long arc started on April 17, 2011 at 07:31:23 UTC, when I purchased Sofaar.com — still visible in public WHOIS today.

Companies I own

Digital marketing and software, built to ship.

Owner 9 Integrated digital marketing agency — strategy, search, paid, content, websites, and measurement as one growth system. 9digitalmarketingagency.com Owner AppDev365 Ready-to-use industry software plus custom engineering — SaaS today, bespoke when you outgrow the defaults. appdev365.com

Projects that help people

Small products with a clear job to do.

USDToy A practical project built to help people — simple tools, clear utility. usdtoy.com CodeReff A builder project for developers and makers who need faster references and workflows. codereff.com

Public service

Volunteer · Programmer Specialist Open Data Indonesia Part of the Open Data Indonesia initiative as a programmer specialist with the Office of the Presidential Staff (Kantor Staf Presiden) — helping make public data more usable. data.go.id

The timestamp that proves it

Public registry record for Sofaar.com

Domain: sofaar.com
Creation date: April 17, 2011 at 07:31:23 UTC
Registrant: Job Sofaar
Years online: 15+ years

Verify on WHOIS

Digital optimization

The levers I use to grow products, apps, and brands online.

SEO Search Engine Optimization Technical, content, and authority work that compounds organic visibility over time.
GEO Generative Engine Optimization Structure answers and entities so AI search and generative engines can cite and recommend you.
ASO App Store Optimization Listing, creatives, and conversion work that improves discoverability inside app stores.
AIO AI Optimization Use AI across research, content systems, and workflows without losing brand clarity or quality.
CRO Conversion Rate Optimization Landing pages, funnels, and experiments that turn more traffic into meaningful actions.
PPC Paid Performance Google Ads and paid acquisition with tracking, testing, and budget discipline.
UXO Experience Optimization Speed, usability, and journey design so people can understand and act without friction.
Analytics Measurement & Attribution Tracking, reporting, and decision systems so optimization is based on signal — not guesswork.

What I do

Developer Web platforms, SaaS, and systems that stay maintainable as they scale.
Digital Marketing Integrated growth through 9 — search, paid, content, sites, and measurement.
Organic Growth SEO, GEO, ASO, AIO, CRO, and compounding distribution built for the long game.