Build
Create robust SaaS and business software.
Turn a complex workflow into a usable product: multi-tenant SaaS, web and mobile apps, and customer portals, with clear architecture, tests and a reviewed release.
Discuss a new buildPrincipal Software Architect · SaaS · AI Automation
Complexsoftware.Cleartechnicalownership.
Work directly with Itzhak Shaul, a Principal Software Architect with 30+ years of hands-on experience. I build SaaS platforms, AI agents and integrations, and modernize the business systems your team depends on.
Next.js/Python/.NET/PostgreSQL/AI agents
Enterprise experience, earned over decades.
Prior professional experience of Itzhak Shaul.
- AIG
- ERN
- Teva
- Clalit
- Shagrir
- Gilat
How we start
Three steps from first message
to working software.
No long forms or sales process. A clear path with a decision point at every step.
- 01
Talk through the problem
Send a short description of what you need. We discuss your goals, constraints and existing systems, and I tell you honestly whether I am the right fit.
- 02
Agree scope and a first milestone
You receive a written scope, a fixed price per milestone and clear acceptance criteria. Anything unclear is settled before work begins.
- 03
Build and review in milestones
You see working software at every milestone and decide whether to continue. Ownership, documentation and handover are agreed in writing.
How I can help
Build. Automate. Modernize.
From a new SaaS product to AI automation and legacy systems—senior judgment for the work that matters to your business.
Automate
Put AI to work where it is dependable.
AI agents with RAG, document extraction, and workflow automation built for production: validation, fallbacks, audit trails and human review for sensitive decisions.
Discuss automationModernize
Move critical legacy systems forward.
Understand the business rules, improve the architecture, and make controlled changes to the systems your team relies on, including legacy .NET, SQL Server and AS/400.
Discuss modernizationFeatured project
One platform for leads, conversations and AI, safely shared by many companies.
A multi-tenant SaaS combining a CRM, an AI agent with a per-customer knowledge base, and WhatsApp automation. Each business gets isolated data, its own knowledge base, and a clean hand-off from AI to a person.
Read the case studySelected projects
Systems built for
real business operations.
Explore the business challenge, the architecture and the software delivered. Selected freelance projects led hands-on by Itzhak Shaul; client identities are confidential.
CRM & operations
One connected platform for complex operations
A unified platform replacing a legacy hotel system, spreadsheets and separate accounting tools across hospitality, education, CRM and finance.
- Origami CRM
- Tranzila API
- WhatsApp Business API
- REST
- Webhooks
Enterprise SaaS & AI
Enterprise SaaS with AI agents and connected commerce
A production-delivered platform connecting web, mobile, e-commerce, AI agents and enterprise systems through a modular architecture.
- NestJS
- FastAPI
- Next.js
- PostgreSQL
- Supabase
- +3
FinTech & production delivery
FinTech platform completion and production hardening
Backend completion, recurring billing, secure access and automated trading-account provisioning for a subscription-based FinTech platform.
- FastAPI
- Django
- PostgreSQL
- Redis
- Celery
- +3
AI workflow automation
AI document extraction and CRM automation
An automation layer that extracts structured data from PDFs and text, routes uncertain information for review and synchronizes validated records with CRM systems.
- n8n
- Make
- OpenAI
- LangChain
- LlamaIndex
- +3
Private AI & decision support
On-premise AI decision support
An air-gapped Hebrew-language decision-support system combining deterministic rules, a local language model and human approval.
- Python
- FastAPI
- vLLM
- Ollama
- Hebrew NLP
- +3
DocuFlow AI · Business automation
Document intake and routing automation
A web and mobile system that collects documents from Gmail, WhatsApp and SMS, classifies them with AI and routes them to the right customer folder.
- Python
- Node.js
- OCR + LLM
- Gmail API
- WhatsApp Business API
- +2
Project details are summarized to protect client confidentiality. Methodspire demos below use synthetic data and are separate from this client work.
Selected enterprise experience
Business systems.
Real complexity.
Experience developed inside established organizations, where continuity, data, and business rules shape every technical decision.
AIGInsurance
Direct employment · 2008–2013
Complex insurance systems. Connected operations.
Business software, document interfaces, Windows Services, and reporting across SQL Server and AS/400 DB2.
.NET · Windows Services · SQL Server · Reporting
ERNFinancial operations
Professional role · 2016–2020
Software where the details have to reconcile.
Collections applications, C# services, and operational reporting, including integration with check-sorting equipment.
C# · Web Services · SQL Server · Equipment integration
A broader enterprise backgroundProject work for Teva, Clalit, and Shagrir through Comtek, and Gilat Satellite Networks through Transtech.
View professional backgroundThese examples describe the founder’s previous employment and project work. They are not Methodspire client case studies or endorsements.
Architecture & modernization
Keep the business moving.
Move the architecture forward.
A full rewrite is not a starting assumption. The first task is finding a practical path from the system you have to the capabilities you need.
Start with what the business depends on.
Map the current system, its data, and the workflows that must keep running. Make hidden dependencies visible before choosing what to change.
System view01 / 03
Current-state assessment
Business applicationMap critical workflows
SQL Server & dataReview dependencies
Services & integrationsIdentify failure points
A shared system map and a prioritized risk list.
Illustrative approach. The architecture is defined around your system.Working demos
See the thinking.
Try the software.
Methodspire demonstration projects with synthetic data. A practical look at business workflows.
Interactive sample · Synthetic data
A clearer path from supplier quote to purchase decision.
Compare offers, surface missing information, and keep the approval behind each decision visible.
Open working demoExplore the sample below, or open the full application.
Supplier quotes & purchasing
QUOTE COMPARISONRFQ-1042
Choose a supplier to review the quote.
Northline Supply: all line prices are available for review.
Delivery process
Clarity at every step.
One accountable technical partner, from the first question to the agreed delivery.
- 01
Understand
Map the business, the existing system, and what success means.
A clear problem definition - 02
Decide
Agree the architecture, scope, risks, and acceptance criteria.
A documented plan - 03
Build & verify
Review working increments and test the business workflows.
Visible, reviewable progress - 04
Deliver
Agree deployment, documentation, ownership, and support responsibilities.
A clear handoff
Meet your principal architect
Your vision.
In experienced hands.
Move your project forward with clear guidance, thoughtful engineering, and confidence in the next step.
I’m Itzhak Shaul, founder of Methodspire and a Principal Software Architect with more than 30 years of hands-on experience. I help businesses turn complex requirements into practical software—from SaaS platforms and AI automation to the enterprise systems they depend on.
Your project starts with understanding your business, agreeing on priorities, and defining a clear first milestone. You get straightforward communication, working software to review along the way, and one accountable technical lead from architecture through implementation. Code review and testing are part of the process, so you can make informed decisions as the work moves forward.
- What you can expect
- Clear scope, agreed milestones, direct communication, and reviewed delivery.
- Working together
- Based in Israel. Working remotely with U.S. and international clients.
Before we talk
A few good
questions.
You don’t need a finished specification to start a conversation.
Ask Itzhak directlyYes. Existing codebases, Windows Services, desktop applications, and SQL Server systems are a central part of my background. We begin by understanding the workflows and dependencies, then agree a focused change and how to verify it.
Yes. A specific integration, technical investigation, bug fix, or architecture review can be the starting point. We define the deliverable, estimate, and acceptance criteria before work starts.
The scope and technical constraints determine the estimate. After the initial conversation, we identify what can be estimated and whether a separate discovery step is needed. You review the proposed scope, cost, and schedule before committing.
I am based in Israel and work remotely with U.S. and international clients. We agree meeting times, communication channels, and review points around your team’s needs. Written decisions and working demonstrations keep the project easy to follow.
AI can assist with implementation, analysis, and automation. It does not replace responsibility for technical decisions. We agree the use of client information and access, and changes are reviewed and tested against the requirements.
Most projects start with an agreed scope, delivered in milestones with a fixed price per milestone, so you can review working software before continuing. Ongoing support or open-ended work can be arranged separately. We agree the terms in writing before work begins.
The engagement agreement defines source-code ownership, documentation, deployment responsibilities, and any follow-on support. These expectations are made explicit before development begins.
Let’s talk about your software
What needs
to work better?
Tell me about your system, your business goal, or the technical problem in the way. We’ll identify a sensible next step.
Speak directly with Itzhak ShaulFounder & Principal Software Architect
Scope, cost, and availability are agreed before an engagement begins.