Cloud & Microservices Architecture
Design resilient, observable distributed systems on AWS that scale with demand instead of against it.
- Service boundaries & domain design
- AWS reference architectures
- Cost & reliability reviews
Software Architecture & Advisory
Systems that scaleDecisions that hold
We help growing companies modernize legacy platforms, scale on the cloud, and ship AI that works in production. You work directly with a senior architect, not a sales team.
- 15+ years in enterprise architecture
- Senior-led, every engagement
- Somerset, NJ · Remote-first
Services
Architecture for systems that can’t afford to fail.
Focused, senior-level engagements across the full lifecycle of a platform — from the first whiteboard to production and beyond.
Legacy System Modernization
Migrate monoliths and aging platforms incrementally, without freezing the business or betting it on a rewrite.
- Strangler-fig migration plans
- Data migration strategy
- Zero-downtime cutovers
AI & Agentic Workflow Integration
Move AI from prototype to production with evaluation, guardrails, and workflows your team can actually operate.
- Use-case & feasibility assessment
- RAG & agent architectures
- Evaluation & safety guardrails
Marketplace & Platform Engineering
Build multi-sided platforms with the trust layer built in: verification, payments, escrow, and integrity controls.
- Matching & bidding systems
- Payments & escrow flows
- Trust & safety infrastructure
Fractional CTO & Architecture Reviews
Senior technical leadership on demand — for roadmaps, due diligence, hiring, and high-stakes decisions.
- Architecture & code reviews
- Technical due diligence
- Roadmap & team guidance
Not sure where to start?
Most engagements begin with a short conversation about where your system is today. We’ll tell you honestly which of these fits — or whether none do.
Ways to Engage
Clear scope. Clear outcomes.
Three engagement models, each designed to deliver something concrete. Most clients start with an assessment.
Architecture Assessment
2–3 weeks · Fixed fee
A deep review of your current system and a prioritized roadmap you can execute with or without us.
- Stakeholder & codebase review
- Risk, cost & scalability analysis
- Target architecture diagrams
- Written roadmap & readout session
Build Sprint
6–12 weeks · Milestone-based
Hands-on delivery of a defined outcome — a migration phase, a new platform capability, or an AI system.
- Architecture & implementation
- Milestone demos & acceptance
- Documentation & runbooks
- Knowledge transfer to your team
Fractional Architect
Monthly retainer
Ongoing senior guidance for teams that need architectural leadership without a full-time hire.
- Reserved monthly hours
- Design & code reviews
- Roadmap & vendor decisions
- Priority async access
Engineering Talent
Architect-vetted engineers, on demand.
Need hands, not just a blueprint? We supply software engineers screened by a senior architect, on contract or as direct hires.
- Team ExtensionContract
- Direct HirePermanent placement
Approach
A blueprint before a single line of code.
- 01 /04
Discover
Understand the business goals, constraints, and the system as it really is — not as the diagram says.
- 02 /04
Architect
Design the target state and an incremental path to it, with trade-offs made explicit and documented.
- 03 /04
Build
Deliver in verifiable milestones, with working software and measurable progress at every step.
- 04 /04
Hand Off
Leave your team with documentation, runbooks, and the confidence to own what was built.
Proof of Practice
We build what we advise on.
ZetuTech doesn’t only design platforms for clients — we engineer and operate our own. AssignNet is where our architecture principles are tested in production.
Built & Operated In-House
AssignNet: a trust-first, two-sided marketplace
AssignNet matches clients with vetted specialists for research and technical work. We designed, built, and run the whole platform: competitive bidding, milestone-based delivery, real-time collaboration, and a mediation process for when things go wrong.
Read the case study
Live in production
Verification & Integrity Pipeline
Identity and credential checks (KYC) before anyone can bid, and automated AI and plagiarism scanning on every delivery through the Copyleaks API.
Two Payment Rails
Stripe escrow that releases funds only on approval, alongside pay-after-review settlement over M-Pesa or bank transfer.
About
Engineered by Experience.
ZetuTech LLC was founded by Brian Wangila, a Senior Software Architect with more than 15 years of experience in system architecture, cloud microservices, and enterprise digital transformation.
That career has been spent migrating legacy enterprise systems, decomposing monoliths into resilient distributed services, and designing platforms where correctness is not optional.
As a boutique firm, every engagement is led personally by Brian — no hand-offs to junior teams, no layers between you and the person designing your system.
Brian Wangila
Founder · Senior Software Architect
Connect on LinkedInzetutech://leadership
Online$ zetutech query --founder --verbose
- [LOCATION]
- Somerset, NJ
- [EXPERIENCE]
- 15+ years
- [FOCUS]
- B2B Marketplaces, Agentic Workflows, AI
- [STACK]
- Next.js, Python, PostgreSQL, AWS
> 4 records returned
Certificates
Machine Learning
Cornell University
Systems Design
Cornell University
Designing and Building AI Products and Services
MIT xPro
Have a system that needs to scale?
Tell us where you are and where you need to be. You’ll get a straight answer on whether we can help — usually within one business day.