Services

I architect systems by turning complex requirements into clear execution blueprints your team can deliver with confidence.

Who I work best with

Best fit for funded startups and enterprise teams with clear product goals and real delivery constraints.

Most engagements run 2 to 8 weeks, depending on scope and urgency.

How engagement cost is determined

Every engagement is custom. Cost depends on three variables: scope, timeline, and team integration. We confirm the investment range together on the discovery call.

See how cost is determined
Mike Hajj

20 Years of Building Systems That Matter

I started in 2005 as a developer and quickly discovered that architecture is what drives true long-term business value.

  • Co-founded SOAJS, an open-source microservices framework with 650K+ downloads.
  • Architected and scaled systems serving millions of users at Rakuten.
  • Built multi-tenant systems handling high-volume daily traffic.
  • Bring architecture-first thinking to AI-assisted execution workflows.
Full Story

What Clients Say

"Mike is not only a highly skilled technologist but also leads by example with honesty, integrity, and trustworthiness."

Rick Valdez
Rick ValdezFounder & CEO, Corsair USA

"Mike simplified complex propositions quickly and helped us design elegant and practical solutions."

Jad El Jerdy
Jad El JerdyCEO, Pixi Interactive SARL

"He consistently transformed complex technical challenges into reliable systems. A true professional."

Jean Saliba
Jean SalibaFounder & CEO, Preset Solutions

Have a System to Design?

Whether you are building something new or scaling something existing, I can help you architect the right path forward.

  1. Share your context and goals through the contact form.
  2. I reply within one business day in most cases.
  3. If aligned, we schedule a focused call and define scope.
Start a Conversation

Frequently Asked Questions

What type of engagements are the best fit?

The best fit is teams with active delivery pressure and architecture decisions that directly impact scalability, reliability, and speed.

How long does a typical engagement take?

Most architecture and acceleration engagements run between 2 and 8 weeks, with clear deliverables and checkpoints.

Do you work with startups and enterprise teams?

Yes. I support funded startups, scale-ups, and enterprise teams modernizing complex systems or launching new products.