Apadua: Procurement SaaS
Building procurement software for corporate sourcing workflows through modular, event-centric B2B marketplace engineering. Our work focused on building a multi-tenant RFX engine and evaluation platform for professional services in Germany, utilizing Vertical Slice Architecture to deliver a scalable, maintainable procurement platform.
70% Faster
Cycle Time
RFX-As-A-Service Core
Automation
Challenge & Scope
Requirements
Modernizing massive, manual tender processes previously run via spreadsheets
Designing a flexible scoring system for multi-evaluator qualitative analysis
Ensuring extreme data isolation between competing vendors and clients
Maintaining delivery speed in a complex, multi-domain SaaS codebase
Strategic Objectives
Replace fragmented procurement tools with a unified, data-driven RFX and tender management platform.
Key Deliverables
Technical Execution
Vertical Slice Architecture
Organized the entire codebase by domain slices rather than layers, improving maintainability and feature isolation for rapid growth.
Event-Centric RFX Flow
Developed a pluggable 'App' architecture within the platform for Demand Intake, Questions, Comparison, and Awarding logic.
Corporate Multi-Tenancy
Implemented schema-based data isolation to ensure total security for massive corporate tenders and vendor bids.
Technical Stack
Backend
Python 3.13
Django 5.2
Django Ninja
Celery
Frontend
Next.js 15
React 19
Bun
MUI
Infrastructure
PostgreSQL (Schemas)
Redis
Docker
QA/DevOps
Playwright (E2E)
Pytest
GitHub Actions
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Features & Outcomes
Tender Lifecycle
Cut RFX cycles from creation to award by up to 70%.
Comparison Dash
Automated analysis of complex vendor pricing and quality.
Governance Ready
Full audit-trail and transparency for corporate sourcing.
Client Benefits
Access to senior-level architectural thinking and DevOps leadership
Delivery of complex procurement platform features via Domain-Driven Design
Support for local legal and payment compliance requirements of complex multi-tenant corporate data
Direct collaboration sync with European-based leadership (UTC+3)
Strategic Outcomes
Reduced tool sprawl and software licensing costs
Improved transparency and governance in sourcing
Delivered a user experience for procurement teams and vendors for both corporate clients and vendors
Established a technical foundation for continued platform growth
System Interfaces
Project Team
Project Owner
Architect
Domain-Driven Design & Stack Strategy
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