Fractional CTO, YunoJuno

Job Title: IT Solutions Architect Start Date: ASAP Duration: 5 Days Location: Remote Allocation: Fractional Project: SaaS Platform

Project Overview

We are seeking an experienced Senior Solution Architect to design the commercial architecture for a secure, scalable SaaS platform for the infrastructure and construction sector. A working prototype has already been developed and validated. The next phase is to define the production architecture before development begins.

The initial deployment will support a controlled two-site pilot, with the platform designed to scale to a national rollout.

This engagement is for architecture, security design, and technical specification only.

Proposed Technology Stack The current technology approach includes: FlutterFlow (mobile and web applications) Xano or similar managed backend PostgreSQL database AWS cloud infrastructure GitHub for source control

We're open to alternative recommendations where they provide clear benefits in security, scalability, maintainability, or cost.

Key Platform Features The platform will include: Worker and contractor registration Project and site management Digital inductions and daily briefings Site attendance and access records Competency and certification management Document and RAMS acknowledgements Incident and near-miss reporting Photo and document uploads Dashboards and reporting Role-based access control Mobile and web access Offline capability for low-connectivity sites (preferred)

Future integrations may include SSO, access-control systems, third-party contractor platforms, and AI-powered functionality.

Scope of Work The successful contractor will: Review the existing prototype and workflows Validate or recommend improvements to the proposed architecture Design a secure multi-tenant SaaS architecture Define the data model and permissions structure Design authentication and API architecture Recommend AWS services and infrastructure Define file storage, backup, logging, and disaster recovery Assess offline synchronisation requirements Identify technical risks and platform limitations Produce a detailed development-ready technical specification Create a roadmap for scaling from pilot to enterprise deployment

Deliverables The final package should include: Solution architecture document Architecture and data-flow diagrams Multi-tenant data model User roles and permissions matrix Security architecture API and integration design AWS infrastructure recommendations Backup and disaster recovery strategy Threat model and security risk register GDPR considerations Scalability roadmap Technology recommendations Development standards and implementation guidance

Documentation should be suitable for developers to use for implementation and estimation.

Required Experience Applicants should have proven experience with: Multi-tenant SaaS architecture AWS cloud solutions Secure API design PostgreSQL or similar databases Mobile and web application architecture FlutterFlow, Flutter, Xano, Supabase, or similar platforms Identity and access management (RBAC) Security, audit logging, and GDPR compliance Offline-first application design Enterprise or infrastructure-related systems

Ideal Candidate

We're looking for an independent senior architect or fractional CTO who can: Design practical, scalable solutions Understand the strengths and limitations of low-code platforms Challenge technical assumptions where appropriate Communicate clearly with both technical and non-technical stakeholders Produce professional, implementation-ready documentation