Technical Architect

Technical Architect - Composable Commerce

6-Month Initial Contract | £800/day max | Inside IR35

Remote

We're looking for a highly experienced, hands-on Technical Architect to provide technical leadership for a strategic composable eCommerce platform supporting a major retail and optical client.

The role combines architecture, engineering leadership and production support, with a strong focus on commerce tools, MACH architecture, TypeScript/Node.js and Microsoft Azure. You'll play a key role in transitioning technical ownership from an incumbent supplier while driving platform reliability, continuous improvement and engineering best practice.

The Role

You'll be responsible for:

Providing senior technical leadership across production support, incidents, defects, changes and enhancements

Acting as the senior escalation point for complex technical issues and major incidents

Leading root cause analysis and driving permanent, high-quality fixes

Reviewing architecture, technical approaches, code and pull requests

Investigating complex production issues across applications, APIs, integrations, SaaS and Azure

Supporting knowledge transfer and establishing independent technical ownership

Mentoring engineers and strengthening the team's commerce, cloud and platform capabilities

Improving CI/CD, automated testing, deployment automation, monitoring and observability

Driving automation, platform hardening, resilience and technical debt reduction

Working constructively with suppliers and technical teams to challenge solutions and ensure decisions are evidence-based

Essential Technical Experience

Composable Commerce / commercetools

Proven commercial experience designing, building and supporting commercetools production solutions

Strong understanding of commercetools APIs, configuration, data structures and integration patterns

Experience troubleshooting complex commercetools production issues

Strong understanding of headless, API-first and composable commerceMACH Architecture

Strong practical experience with:

Microservices

API-first design

Cloud-native SaaS

Headless architecture

Event-driven and distributed systems

Integration resilience and failure handlingTypeScript / Node.js

Strong hands-on TypeScript and Node.js development

Ability to read, debug, review and write production-quality TypeScript

API, integration service and serverless development

REST API and third-party SaaS integrations

Commercetools SDK experience highly desirableMicrosoft Azure

Strong experience supporting cloud-native applications on Azure

Hands-on Azure Functions, ideally using TypeScript/Node.js

Azure App Services and serverless/PaaS architectures

NoSQL experience, with Cosmos DB highly desirable

Ability to troubleshoot performance, networking, configuration and integration issuesFrontend / Web Architecture

Strong understanding of modern web and headless commerce architectures

Working knowledge of React and Next.js

Ability to troubleshoot issues across complete customer journeys

Retail & eCommerce Experience - Essential

You'll need significant experience delivering or supporting high-volume B2C retail/eCommerce platforms, ideally across multi-market or multi-region environments.

Experience should include customer journeys such as:

Product discovery and search

Basket/cart and checkout

Customer journeys

Promotions

Payments

Order managementExperience integrating commerce platforms with CMS, PIM, payment, search, promotions, customer and order management systems is highly desirable.

DevOps / SRE / Operational Engineering

Strong experience across:

CI/CD and deployment automation

Infrastructure and configuration as code

Automated unit, integration and regression testing

Monitoring, logging, tracing and observability

Root cause analysis and problem management

Resilience and platform hardening

Technical debt management

Production debugging

Release and rollback strategies

Automated operational runbooks

Vulnerability remediation

Shift-left engineering and continuous improvement

Technology Environment

The platform incorporates technologies including:

commercetools | React / Next.js | TypeScript / Node.js | Azure Functions | Azure App Services | Cosmos DB | Contentful | Algolia | Talon.One | Adyen | Cloudflare | GitHub CI/CD | Infrastructure as Code | OpenTelemetry | Splunk

Equivalent technologies may also be considered where the candidate has strong composable commerce experience.

What We're Looking For

We're looking for someone with strong technical credibility who can operate comfortably between architecture, engineering and live production support.

You should be confident challenging technical decisions constructively, diagnosing complex issues using code, logs and telemetry, remaining calm during major incidents, and balancing rapid service restoration with long-term engineering quality.

Contract Details

Role: Technical Architect - Composable Commerce

Duration: 6 months initially

Rate: Up to £800 per day

IR35: Inside IR35

Location: Remote

Start: September 2026This is a hands-on Technical Architect role - not a purely strategic architecture position. The successful candidate will be expected to get into the technical detail, support production issues and actively guide engineering teams