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London - £625 per day Contract Posted by: Konvergent Ltd Posted: Thursday, 22 January 2026
 
 

Solution Architect to take ownership of two related workstreams within an initial 3-month engagement. Both workstreams require retrospective documentation of live systems and forward-looking design work. You must be comfortable challenging existing approaches constructively while building consensus among stakeholders across business units and vendors.

Workstream 1: eInvoicing Solution Architecture

This is a regulatory eInvoicing project that is already live, but the architecture was not really completed. There are no High-Level Design (HLD) or Low-Level Design (LLD) documentation. The system is about to be rolled out across approximately 30 European entities, but currently, only 20% of Europe is transacting through the platform.

There is a concern that the system could fail at scale, particularly as international variations in regulatory requirements have not been fully considered.

Deliverables

  • High-Level Design (HLD) document
  • Low-Level Design (LLD) document
  • Gap analysis ofthe existing design
  • Documentation of international/country variants and their requirements
  • Rejection handling design (invoice flow back to ERP)
  • ETL strategy recommendation (rationalise vs. support multiple)
  • Scalability assessment and recommendations
  • Support model recommendations

The second work stream is focused on the replacement of an automation product, details to follow.

Your Experience

  • Proven Solution Architect with data platform/integration architecture background
  • AWS experience (files land in AWS, AWS Data Warehouse)
  • Integration architecture experience - Boomi and/or similar iPaaS platforms
  • Ability to assess and recommend ETL tooling strategy (familiarity with tools like IBM DataStage)
  • Experience designing for resilience, scalability, and supportability
  • Strong documentation skills - comfortable producing HLD and LLD artefacts
  • Experience working across multiple stakeholder groups and divisions
London, UK
IT
3 months
ASAP
£625 per day
Konvergent Ltd
Ben Clark 
JSBC/EIN/12
22/01/2026 15:58:58
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