Senior Technical Architect, Multi-Tenant SaaS & AI Platform

IMSERV Europe Ltd; Milton Keynes; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Up to 10% bonus

Enhanced pension scheme

Life assurance (6x salary)

Health plan (Simply Health)

Car salary sacrifice

Annual leave buy & sell

Job summary

IMSERV Europe Ltd in the UK is seeking a Senior Architect to own the architecture of the Astral platform, govern data foundation, orchestration, API tier and AI layer, and to drive the technical roadmap from current estate to target multi-tenant state.

You will lead design authority, review major technical decisions, define API strategy, and work with the Head of Development to steer multi-tenant migration while balancing value and risk.

Qualifications

• Significant experience as a technical or solutions architect on customer-facing SaaS platforms.
• Direct experience of multi-tenant SaaS architecture, including migration from single-tenant to multi-tenant.
• Engineering background on or near our stack: C#/.NET, Angular and Azure.
• Practical knowledge of AI: LLMs, retrieval-augmented generation and safe use over customer data.
• Knowledge of the wider Microsoft estate, including Microsoft Fabric; Azure AI services desirable.
• Energy or utilities domain knowledge desirable: metering, MHHS, carbon reporting.

Responsibilities

• Keep the current and target architecture documented, validated and understood across the department.
• Review and approve significant technical decisions: patterns, technology choices, integration approaches and third-party services.
• Define the API strategy: portal, analytics and data-feed APIs treated as products, with entitlement enforced.
• Design the multi-utility data architecture across source systems, integration layer and productisation.
• Design the rules and orchestration layer: event backbone, job lifecycles, DMN-driven decisions, and read models.
• Design the AI layer: retrieval over the data foundation, guardrails, and entitlement-aware models.

Skills

Data architecture depth

SaaS architecture

Multi-tenant architecture

C#/.NET

Angular

Azure

Event-driven architecture

AI knowledge

Decision tables / DMN

Executive communication

Education

Engineering background (CS/Software)

Tools

Microsoft Fabric

Azure Durable Functions

Temporal

Camunda

CQRS/read models

Job description

IMSERV Europe Ltd in the UK is seeking a Senior Architect to own the architecture of the Astral platform, govern data foundation, orchestration, API tier and AI layer, and to drive the technical roadmap from current estate to target multi-tenant state.

You will lead design authority, review major technical decisions, define API strategy, and work with the Head of Development to steer multi-tenant migration while balancing value and risk.